英文文献原文+翻译

智能交通系统中英文对照外文翻译文献(文档含英文原文和中文翻译)原文:Traffic Assignment Forecast Model Research in ITS IntroductionThe intelligent transportation system (ITS) develops rapidly along with the city sustainable development, the digital city construction and the development of transportation. One of the main functions of the ITS is to improve transportation environment and alleviate the transportation jam, the most effective method to gain the aim is to forecast the traffic volume of the local network and the important nodes exactly with GIS function of path analysis and correlation mathematic methods, and this will lead a better planning of the traffic network. Traffic assignment forecast is an important phase of traffic volume forecast. It will assign the forecasted traffic to every way in the traffic sector. If the traffic volume of certain road is too big, which would bring on traffic jam, planners must consider the adoption of new roads or improving existing roads to alleviate the traffic congestion situation. This study attempts to present an improved traffic assignment forecast model, MPCC, based on analyzing the advantages and disadvantages of classic traffic assignment forecast models, and test the validity of the improved model in practice.1 Analysis of classic models1.1 Shortcut traffic assignmentShortcut traffic assignment is a static traffic assignment method. In this method, the traffic load impact in the vehicles’ travel is not considered, and the traffic impedance (travel time) is a constant. The traffic volume of every origination-destination couple will be assigned to the shortcut between the origination and destination, while the traffic volume of other roads in this sector is null. This assignment method has the advantage of simple calculation; however, uneven distribution of the traffic volume is its obvious shortcoming. Using this assignment method, the assignment traffic volume will be concentrated on the shortcut, which isobviously not realistic. However, shortcut traffic assignment is the basis of all theother traffic assignment methods.1.2 Multi-ways probability assignmentIn reality, travelers always want to choose the shortcut to the destination, whichis called the shortcut factor; however, as the complexity of the traffic network, thepath chosen may not necessarily be the shortcut, which is called the random factor.Although every traveler hopes to follow the shortcut, there are some whose choice isnot the shortcut in fact. The shorter the path is, the greater the probability of beingchosen is; the longer the path is, the smaller the probability of being chosen is.Therefore, the multi-ways probability assignment model is guided by the LOGIT model:∑---=n j ii i F F p 1)exp()exp(θθ (1)Where i p is the probability of the path section i; i F is the travel time of thepath section i; θ is the transport decision parameter, which is calculated by the followprinciple: firstly, calculate the i p with different θ (from 0 to 1), then find the θwhich makes i p the most proximate to the actual i p .The shortcut factor and the random factor is considered in multi-ways probabilityassignment, therefore, the assignment result is more reasonable, but the relationshipbetween traffic impedance and traffic load and road capacity is not considered in thismethod, which leads to the assignment result is imprecise in more crowded trafficnetwork. We attempt to improve the accuracy through integrating the several elements above in one model-MPCC.2 Multi-ways probability and capacity constraint model2.1 Rational path aggregateIn order to make the improved model more reasonable in the application, theconcept of rational path aggregate has been proposed. The rational path aggregate,which is the foundation of MPCC model, constrains the calculation scope. Rationalpath aggregate refers to the aggregate of paths between starts and ends of the trafficsector, defined by inner nodes ascertained by the following rules: the distancebetween the next inner node and the start can not be shorter than the distance betweenthe current one and the start; at the same time, the distance between the next innernode and the end can not be longer than the distance between the current one and theend. The multi-ways probability assignment model will be only used in the rationalpath aggregate to assign the forecast traffic volume, and this will greatly enhance theapplicability of this model.2.2 Model assumption1) Traffic impedance is not a constant. It is decided by the vehicle characteristicand the current traffic situation.2) The traffic impedance which travelers estimate is random and imprecise.3) Every traveler chooses the path from respective rational path aggregate.Based on the assumptions above, we can use the MPCC model to assign thetraffic volume in the sector of origination-destination couples.2.3 Calculation of path traffic impedanceActually, travelers have different understanding to path traffic impedance, butgenerally, the travel cost, which is mainly made up of forecast travel time, travellength and forecast travel outlay, is considered the traffic impedance. Eq. (2) displaysthis relationship. a a a a F L T C γβα++= (2)Where a C is the traffic impedance of the path section a; a T is the forecast traveltime of the path section a; a L is the travel length of the path section a; a F is theforecast travel outlay of the path section a; α, β, γ are the weight value of that threeelements which impact the traffic impedance. For a certain path section, there aredifferent α, β and γ value for different vehicles. We can get the weighted average of α,β and γ of each path section from the statistic percent of each type of vehicle in thepath section.2.4 Chosen probability in MPCCActually, travelers always want to follow the best path (broad sense shortcut), butbecause of the impact of random factor, travelers just can choose the path which is ofthe smallest traffic impedance they estimate by themselves. It is the key point ofMPCC. According to the random utility theory of economics, if traffic impedance is considered as the negativeutility, the chosen probability rs p of origination-destinationpoints couple (r, s) should follow LOGIT model:∑---=n j jrs rs bC bC p 1)exp()exp( (3) where rs p is the chosen probability of the pathsection (r, s);rs C is the traffic impedance of the path sect-ion (r, s); j C is the trafficimpedance of each path section in the forecast traffic sector; b reflects the travelers’cognition to the traffic impedance of paths in the traffic sector, which has reverseratio to its deviation. If b → ∞ , the deviation of understanding extent of trafficimpedance approaches to 0. In this case, all the travelers will follow the path whichis of the smallest traffic impedance, which equals to the assignment results withShortcut Traffic Assignment. Contrarily, if b → 0, travelers ’ understanding error approaches infinity. In this case, the paths travelers choose are scattered. There is anobjection that b is of dimension in Eq.(3). Because the deviation of b should beknown before, it is difficult to determine the value of b. Therefore, Eq.(3) is improvedas follows:∑---=n j OD j OD rsrs C bC C bC p 1)exp()exp(，∑-=n j j OD C n C 11（4） Where OD C is the average of the traffic impedance of all the as-signed paths; bwhich is of no dimension, just has relationship to the rational path aggregate, ratherthan the traffic impedance. According to actual observation, the range of b which is anexperience value is generally between 3.00 to 4.00. For the more crowded cityinternal roads, b is normally between 3.00 and 3.50.2.5 Flow of MPCCMPCC model combines the idea of multi-ways probability assignment anditerative capacity constraint traffic assignment.Firstly, we can get the geometric information of the road network and OD trafficvolume from related data. Then we determine the rational path aggregate with themethod which is explained in Section 2.1.Secondly, we can calculate the traffic impedance of each path section with Eq.(2),Fig.1 Flowchart of MPCC which is expatiated in Section 2.3.Thirdly, on the foundation of the traffic impedance of each path section, we cancalculate the respective forecast traffic volume of every path section with improvedLOGIT model (Eq.(4)) in Section 2.4, which is the key point of MPCC.Fourthly, through the calculation processabove, we can get the chosen probability andforecast traffic volume of each path section, but itis not the end. We must recalculate the trafficimpedance again in the new traffic volumesituation. As is shown in Fig.1, because of theconsideration of the relationship between trafficimpedance and traffic load, the traffic impedanceand forecast assignment traffic volume of everypath will be continually amended. Using therelationship model between average speed andtraffic volume, we can calculate the travel timeand the traffic impedance of certain path sect-ionunder different traffic volume situation. For theroads with different technical levels, therelationship models between average speeds totraffic volume are as follows: 1) Highway: 1082.049.179AN V = (5) 2) Level 1 Roads: 11433.084.155AN V = (6) 3) Level 2 Roads: 66.091.057.112AN V = (7) 4) Level 3 Roads: 3.132.01.99AN V = (8) 5) Level 4 Roads: 0988.05.70A N V =(9) Where V is the average speed of the path section; A N is the traffic volume of thepath section.At the end, we can repeat assigning traffic volume of path sections with themethod in previous step, which is the idea of iterative capacity constraint assignment,until the traffic volume of every path section is stable.译文智能交通交通量分配预测模型介绍随着城市的可持续化发展、数字化城市的建设以及交通运输业的发展，智能交通系统（ITS）的发展越来越快。

外文文献翻译译稿1卡尔曼滤波的一个典型实例是从一组有限的，包含噪声的，通过对物体位置的观察序列（可能有偏差）预测出物体的位置的坐标及速度。

在很多工程应用（如雷达、计算机视觉）中都可以找到它的身影。

同时，卡尔曼滤波也是控制理论以及控制系统工程中的一个重要课题。

例如，对于雷达来说，人们感兴趣的是其能够跟踪目标。

但目标的位置、速度、加速度的测量值往往在任何时候都有噪声。

卡尔曼滤波利用目标的动态信息，设法去掉噪声的影响，得到一个关于目标位置的好的估计。

这个估计可以是对当前目标位置的估计（滤波），也可以是对于将来位置的估计（预测），也可以是对过去位置的估计（插值或平滑）。

命名[编辑]这种滤波方法以它的发明者鲁道夫.E.卡尔曼（Rudolph E. Kalman）命名，但是根据文献可知实际上Peter Swerling在更早之前就提出了一种类似的算法。

斯坦利。

施密特（Stanley Schmidt）首次实现了卡尔曼滤波器。

卡尔曼在NASA埃姆斯研究中心访问时，发现他的方法对于解决阿波罗计划的轨道预测很有用，后来阿波罗飞船的导航电脑便使用了这种滤波器。

关于这种滤波器的论文由Swerling（1958）、Kalman (1960)与Kalman and Bucy（1961）发表。

目前，卡尔曼滤波已经有很多不同的实现。

卡尔曼最初提出的形式现在一般称为简单卡尔曼滤波器。

除此以外，还有施密特扩展滤波器、信息滤波器以及很多Bierman, Thornton开发的平方根滤波器的变种。

也许最常见的卡尔曼滤波器是锁相环，它在收音机、计算机和几乎任何视频或通讯设备中广泛存在。

以下的讨论需要线性代数以及概率论的一般知识。

卡尔曼滤波建立在线性代数和隐马尔可夫模型（hidden Markov model）上。

其基本动态系统可以用一个马尔可夫链表示，该马尔可夫链建立在一个被高斯噪声（即正态分布的噪声）干扰的线性算子上的。

系统的状态可以用一个元素为实数的向量表示。

3000字英文参考文献及其翻译【注意：选用的英文一定要与自己的论文题目相关。

如果文章太长，可以节选（用省略号省略一些段略）。

如果字数不够，可以选2至3篇，但要逐一注明详细出处。

英文集中在一起放前面，对应的中文翻译放后面。

中文翻译也要将出处翻译，除非是网页。

对文献的翻译一定要认真！对英文文献及其翻译的排版也要和论文正文一样！特别注意：英文文献应该放在你的参考文献中。

】TOY RECALLS——IS CHINA THE PROBLEM？Hari. Bapuji Paul W. BeamishChina exports about 20 billion toys per year and they are the second most commonly imported item by U.S. and Canada. It is estimated that about 10,000 factories in China manufacture toys for export. Considering this mutual dependence, it is important that the problems resulting in recalls are addressed carefully.Although the largest portion of recalls by Mattel involved design flaws, the CEO of Mattel blamed the Chinese manufacturers by saying that the problem resulted ‘in this case （because）one of our manufacturers did not follow the rules’. Several analysts too blamed the Chinese manufacturers. By placing blame where it did not belong, thereis a danger of losing the opportunity to learn from the errors that have occurred. The first step to learn from errors is to know why and where the error occurred. Further, the most critical step in preventing the recurrence of errors is to find out what and who can prevent it.……From:/loadpage.aspx?Page=ShowDoc&Category Alias=zonghe/ggmflm_zh&BlockAlias=sjhwsd&filename=/doc/sjhwsd/2 00709281954.xml, Sep. 2007玩具召回——是中国的问题吗？哈里·巴普基保罗·比密什中国每年大约出口20亿美元的玩具，最常见是从美国和加拿大进口项目。

消费者行为心理学中英文外文文献翻译(含：英文原文及中文译文)英文原文Frontiers of Social PsychologyArie W. Kruglanski 、Joseph P. ForgasFrontiers of Social Psychology is a new series of domain-specific handbooks. The purpose of each volume is to provide readers with a cutting-edge overview of the most recent theoretical, methodological, and practical developments in a substantive area of social psychology, in greater depth than is possible in general social psychology handbooks. The editors and contributors are all internationally renowned scholars whose work is at the cutting-edge of research.Scholarly, yet accessible, the volumes in the Frontiers series are an essential resource for senior undergraduates, postgraduates, researchers, and practitioners, and are suitable as texts in advanced courses in specific subareas of social psychology.Some Social Asp ects of Living in a Consumer SocietyThe following sketches will illustrate that in a consumer society much of the behavior studied by social psychologists relates to consumer stimuli and consumer behavior. Thus, the consumer context provides a rich field for the study of social phenomena and behavior.Consumer Decisions Are UbiquitousWhether we are in the supermarket or not, we are constantly making consumer decisions. We enroll in gyms, use our frequent-flyer miles for a vacation resort, buy health care, choose a restaurant, skip dessert for a healthier lifestyle. In fact, most of our daily decisions do not involve existential decisions such as whom to marry or whether to have children or not, but whether to have tea or coffee, use our credit card or pay cash, or other seemingly trivial decisions. Moreover, many of our daily (consumer) behaviors do not even require intentional decisions. Rather, they may be habitual, such as switching to CNN to get the news or accessing Google when looking up some information. A typical day of a typical person is filled with countless minor consumer decisions or the consequences of previous decisions, starting with the brand of toothpaste in the morning to choosing a movie after work.Consumer Choices Fulfill a Social-Identity FunctionAlthough for most people being a consumer may not be central to their identity, many of their consumer decisions are nevertheless highly identity-relevant insofar as they correspond to a larger set of values and beliefs and express important aspects of the self. Eating a vegetarian diet because one does not want to endorse cruelty to animals and boycotting clothes potentially made by child laborers are some examples. Some people buy a Prius out of environmental concerns; others boycott Japanese cars —such as the Prius —in order to help the local carindustry. In this respect, even the choice between Coke and Pepsi is not necessarily trivial. People who cannot discriminate Coke from Pepsi in a blind test, or who prefer Pepsi, may nevertheless adhere to Coke as a cultural icon. Attempts to change the formula of Coke met with angry protests and opposition. Clearly, consumer products and brands do not only fulfill utilitarian needs (Olson & Mayo, 2000; Shavitt, 1990). In a world of oversupply and differentiating brands, many consumers choose brands in order to express their personality or to affiliate themselves with desired others. They do not simply use a Mac; they are Mac users, and switching to another brand of PC would be akin to treason. From soft drinks to computers, brands may become an ideology. People may also perceive of products as extended selves (Belk, 1988); for example, they may identify with their cars just as they do with pets. Likewise, brands may define social groups. The Harley-Davidson Club is a legendary example; an Internet search revealed clubs for almost every car brand and model. In my hometown, I found a V olkswagen New Beetle Club whose stated purpose is to cultivate contacts between New Beetle Drivers by organizing social events (among others, a visit to a car cemetery). On the road, drivers of the same car model often greet each other. Apparently, driving the same model is sufficient to establish social closeness. Brands, products, and consumption habits not only help to establish social connectivity but also serve as status symbols, defining vertical andhorizontal social boundaries. By using particular brands or consuming specific products, people can express a certain lifestyle or attempt to convey a particular social impression. Subscribing to the opera conveys one’s social position just as going to a monster truck race does. Whether your choice of drink is wine or beer, cappuccino or herbal tea, your order expresses more than merely your taste in beverages.Consumer Choices Affect Social PerceptionGiven that brands and products are part of social expression, it is not surprising that people are judged by the brands and products they use. In particular, products of a social-identity function are used as bases for inferences about a target’s personality traits (Shavitt & Nelson, 2000). Likewise, smoking, food choice and amount of food intake have all been shown to affect social impressions. Depending on the subculture of the perceiver (age, country), different personality traits are assumed in smokers compared with nonsmokers (e.g., Cooper & Kohn, 1989; Jones & Carroll, 1998). Various studies found that eaters of a healthier diet are perceived as more feminine and in general judged more favorably than eaters of unhealthy foods (for a review see V artanian, Herman, & Polivy, 2007). Arguing that a Pepsi drinker is to a Coke drinker what a Capulet was to a Montague is, of course, an exaggeration, but clearly brands may distinguish ingroup from out-group members. Possibly this is most extreme among teenagers, where the brand of jeans is perceived todetermine coolness and popularity. Nevertheless, the phenomenon is not limited to teen culture, as testified by the previous examples of social communities defined by shared brands. In sum, from wet versus dry shaving to driving a Porsche versus a Smart, consumer behavior is used as a cue in person perception. Most likely, such cues also manifest in behavior toward these consumers. Physical attacks on women who wear fur are a most extreme example.Affective Consequences of Consumer BehaviorObviously, consumption and the use of products and services may give pleasure and satisfaction or displeasure and dissatisfaction. People may experience joy from wearing a new sweater or suffer emotional consequences when products or services fail or cause inconvenience. Product use is only one source of affective consumer experiences. The mere act of choosing and acquisition is another. People enjoy or dislike the experience of shopping. They may take pleasure from the freedom of simply choosing between different options (e.g., Botti & Iyengar, 2004), feel overwhelmed and confused by an abundance of options (e.g., Huffman & Kahn, 1998), or feel frustrated by a limited assortment that does not meet their particular needs (e.g., Chernev, 2003). They may experience gratification and a boost in self-esteem from the fact that they can afford a particular consumer lifestyle or grudge the fact that they cannot. Many daily sources of affective experiences involve consumerbehavior in one way or another.The Consumer Context Provides Unique Social InteractionsGranted, we rarely form deep and meaningful relationships with our hairdressers and waiters. Still, the consumer context affords many social interactions over a day. Again, these interactions— even if brief— may constitute a source of affective experiences. The smile of the barista, the compliment from the shop-assistant, and the friendly help from the concierge are just a few examples of how such consumerrelated interactions may make us feel good, worthy, and valued, whereas snappy and rude responses have the opposite effect. Besides, the social roles defined by the consumer context may provide unique opportunities for particular behaviors, interactions, and experiences not inherent in other roles. Being a client or customer makes one expect respect, courtesy, and attendance to one’s needs. For some, this may be the only role in their life that gives them a limited sense of being in charge and having others meet their demands. To give another example, complaining is a form of social interaction that mostly takes place within the consumer context. A search for ―complaint behavior‖ in the PsycI NFO database found that 34 out of 50 entries were studies from the consumer context. (The rest mostly related to health care, which may to some extent also be viewed as consumer context.) Given the importance of the consumer context to social experiences and interactions, it provides a prime opportunity forstudying these social behaviors.•How consumers think, feel, reason, and the psychology of screening for different items (such as brands, products); • Consumer behavior when they shop or make other marketing decisions;•Limits in consumer knowledge or access to information affect decisions and marketing outcomes;•How can marketers adapt and improve their marketing competitiveness and marketing strategies to attract consumers more efficiently?Bergi gives an official definition of consumer behavior: the process and the activities people perform when they research, select, purchase, use, evaluate, and deal with products and services in order to meet their needs. The behavior occurs in a group or an organization where individuals or individuals appear in this context. Consumer behavior includes using and handling products and studying how products are bought. The use of products is generally of great interest to marketers because it may affect how a product is in the best position or how we can encourage increased consumption.The Nicosia model focuses on the relationship between the company and its potential customers. The company communicates with consumers through its marketing messages or advertisements and consumers' reactions to the information they want to buy. Seeing this pattern, we willfind that companies and consumers are interconnected. Companies want to influence consumers. Consumers influence company decisions through their decisions.Consumer sentiment refers to a unique set of emotional reactions to the use of or eliciting a consumer experience in the product, a unique class or relationship of the emotional experience described and expressed (such as joy, anger and fear), such as the structural dimensions of the emotional category or pleasant/unpleasant, Relax/action, or calm/excited. Goods and services are often accompanied by emotional reactions (such as the fear caused by watching a horror movie). Emotional values are often associated with aesthetic choices (such as religion, reason). However, more material and utilitarian products also seem to have emotional value. For example, some foods cause childhood experiences and feel comfortable with them. Izad (1977) developed a method of emotional experience and introduced basic emotions. He uses ten words to distinguish the basic types of emotions: interest, joy, surprise, sadness, anger, disgust, contempt, fear, shame, and guilt. This method has been widely used by consumer research.In order to implement the interpersonal and personal construction in this framework, we use the concept of self-awareness to express the influence of consumer response on society. Self-awareness is defined as the individual's consistent trend to focus directly on inward or outward.This theory identifies two different types of people with self-consciousness. The open self-conscious person pays special attention to other people's views on their outside. The private self-conscious person pays more attention to their inner thoughts and feelings. In this case, we assume that the reputation of consumption may be different based on sensitivity to other people. This proposal is also consistent with previous research. It shows that people with different personal behaviors depend on their sensitivity to interpersonal influences. Dubois and Dikena emphasized that "we believe that the analysis of the direct relationship between consumers and brands is a key to improving understanding of such a market." This original assumption is that of private or The value of the open superior product comes from the inherent social status of these objects. Many existing studies emphasize the role of the role played in the exchange of information about their owners and social relationships.中文译文社会心理学前沿艾瑞·克鲁格兰斯基，约瑟夫·弗加斯社会心理学的前沿是一个新的领域专用手册系列。

外文文献翻译(含：英文原文及中文译文)文献出处：Y Miyazaki. A Brief Description of Interior Decoration [J]. Building & Environment, 2005, 40(10):41-45.英文原文A Brief Description of Interior DecorationY Miyazaki一、An interior design element1 Spatial elementsThe rationalization of space and giving people a sense of beauty is the basic task of design. We must dare to explore the new image of the times and technologies that are endowed with space. We should not stick to the spatial image formed in the past.2 color requirementsIn addition to affecting the visual environment, indoor colors also directly affect people's emotions and psychology. Scientific use of color is good for work and helps health. The proper color processing can meet the functional requirements and achieve the beauty effect. In addition to observing the general laws of color, interior colors also vary with the aesthetics of the times.3 light requirementsHumans love the beauty of nature and often direct sunlight into theinterior to eliminate the sense of darkness and closure in the interior, especially the top light and the soft diffuse light, making the interior space more intimate and natural. The transformation of light and shadow makes the interior richer and more colorful, giving people a variety of feelings.4 decorative elementsThe indispensable building components such as columns, walls, and the like in the entire indoor space are combined with the function and need to be decorated to jointly create a perfect indoor environment. By making full use of the texture characteristics of different decorative materials, you can achieve a variety of interior art effects with different styles, while also reflecting the historical and cultural characteristics of the region.5 furnishingsIndoor furniture, carpets, curtains, etc., are all necessities of life. Their shapes are often furnished and most of them play a decorative role. Practicality and decoration should be coordinated with each other, and the functions and forms of seeking are unified and changed so that the interior space is comfortable and full of personality.6 green elementsGreening in interior design is an important means to improve the indoor environment. Indoor flowering trees are planted, and the use ofgreenery and small items to play a role in diffusing indoor and outdoor environments, expanding the sense of interior space, and beautifying spaces all play an active role.二、The basic principles of interior design1 interior decoration design to meet the functional requirementsThe interior design is based on the purpose of creating a good indoor space environment, so as to rationalize, comfort, and scientize the indoor environment. It is necessary to take into account the laws of people's activities to handle spatial relationships, spatial dimensions, and spatial proportions; to rationally configure furnishings and furniture, and to properly resolve indoor environments. V entilation, lighting and lighting, pay attention to the overall effect of indoor tone.2 interior design to meet the spiritual requirementsThe spirit of interior design is to influence people's emotions and even influence people's will and actions. Therefore, we must study the characteristics and laws of people's understanding; study the emotions and will of people; and study the interaction between people and the environment. Designers must use various theories and methods to impact people's emotions and sublimate them to achieve the desired design effect. If the indoor environment can highlight a certain concept and artistic conception, then it will have a strong artistic appeal and better play its role in spiritual function.3 Interior design to meet modern technical requirementsThe innovation of architectural space is closely related to the innovation of structural modeling. The two should be harmonized and unified, fully considering the image of the structural Sino-U.S. and integrating art and technology. This requires that interior designers must possess the necessary knowledge of the type of structure and be familiar with and master the performance and characteristics of the structural system. Modern interior design is in the category of modern science and technology. To make interior design better meet the requirements of spiritual function, we must maximize the use of the latest achievements in modern science and technology.4 Interior design must meet the regional characteristics and national style requirementsDue to differences in the regions where people live, geographical and climatic conditions, the living habits of different ethnic groups are not the same as cultural traditions, and there are indeed great differences in architectural styles. China is a multi-ethnic country. The differences in the regional characteristics, national character, customs, and cultural literacy of various ethnic groups make indoor decoration design different. Different styles and features are required in the design. We must embody national and regional characteristics to evoke people’s national self-respect and self-confidence.三、Points of interior designThe interior space is defined by the enclosure of the floor, wall, and top surface, thus determining the size and shape of the interior space. The purpose of interior decoration is to create a suitable and beautiful indoor environment. The floor and walls of the interior space are the backdrop for people and furnishings and furnishings, while the differences on the top surface make the interior space more varied.1 Base decoration ----- Floor decorationThe basic surface ----- is very important in people's sights. The ground floor is in contact with people, and the line of sight is near, and it is in a dynamic change. It is one of the important factors of interior decoration. Meet the following principles:2 The base should be coordinated with the overall environment to complement each other and set off the atmosphereFrom the point of view of the overall environmental effect of space, the base should be coordinated with the ceiling and wall decoration. At the same time, it should play a role in setting off the interior furniture and furnishings.3 Pay attention to the division, color and texture of the ground patternGround pattern design can be roughly divided into three situations: The first is to emphasize the independent integrity of the pattern itself,such as meeting rooms, using cohesive patterns to show the importance of the meeting. The color should be coordinated with the meeting space to achieve a quiet, focused effect; the second is to emphasize the pattern of continuity and rhythm, with a certain degree of guidance and regularity, and more for the hall, aisle and common space; third It emphasizes the abstractness of the pattern, freedom, and freedom, and is often used in irregular or layout-free spaces.4 Meeting the needs of the ground structure, construction and physical properties of the buildingWhen decorating the base, attention should be paid to the structure of the ground floor. In the premise of ensuring safety, it is convenient for construction and construction. It cannot be a one-sided pursuit of pattern effects, and physical properties such as moisture-proof, waterproof, thermal insulation, and thermal insulation should be considered. need. The bases are available in a wide variety of types, such as: wooden floors, block floors, terrazzo floors, plastic floors, concrete floors, etc., with a wide variety of patterns and rich colors. The design must be consistent with the entire space environment. Complementary to achieve good results.四、wall decorationIn the scope of indoor vision, the vertical line of sight between the wall and the person is in the most obvious position. At the same time, thewall is the part that people often contact. Therefore, the decoration of the wall is very important for the interior design. The following design principles must be met: 1 IntegrityWhen decorating a wall, it is necessary to fully consider the unity with other parts of the room, and to make the wall and the entire space a unified whole.2 PhysicalThe wall surface has a larger area in the interior space, and the status is more important and the requirements are higher. The requirements for sound insulation, warmth protection, fire prevention, etc. in the interior space vary depending on the nature of the space used, such as the guest room, high requirements. Some, while the average unit canteen, requiresa lower number.3 ArtistryIn the interior space, the decorative effect of the wall plays an important role in rendering and beautifying the indoor environment. The shape of the wall, the partition pattern, the texture and the interior atmosphere are closely related to each other. In order to create the artistic effect of the interior space, the wall The artistry of the surface itself cannot be ignored.The selection of wall decoration styles is determined according to the above principles. The forms are roughly the following: plasteringdecoration, veneering decoration, brushing decoration, coil decoration. Focusing on the coil decoration here, with the development of industry, there are more and more coils that can be used to decorate walls, such as: plastic wallpaper, wall cloth, fiberglass cloth, artificial leather, and leather. These materials are characterized by the use of It is widely used, flexible and free, with a wide variety of colors, good texture, convenient construction, moderate prices, and rich decorative effects. It is a material that is widely used in interior design.五、Ceiling decorationThe ceiling is an important part of the interior decoration, and it is also the most varied and attractive interface in the interior space decoration. It has a strong sense of perspective. Through different treatments, the styling of lamps and lanterns can enhance the space appeal and make the top surface rich in shape. Colorful, novel and beautiful.1 Design principlesPay attention to the overall environmental effects.The ceiling, wall surface and base surface together make up the interior space and jointly create the effects of the indoor environment. The design should pay attention to the harmonization of the three, and each has its own characteristics on a unified basis.The top decoration should meet the applicable aesthetic requirements.In general, the effect of indoor space should be lighter and lighter. Therefore, it is important to pay attention to the simple decoration of the top decoration, highlight the key points, and at the same time, have a sense of lightness and art.The top decoration should ensure the rationality and safety of the top structure. Cannot simply pursue styling and ignore safety2 top design(1) Flat roofThe roof is simple in construction, simple in appearance, and convenient in decoration. It is suitable for classrooms, offices, exhibition halls, etc. Its artistic appeal comes from the top shape, texture, patterns, and the organic configuration of the lamps.(2) Convex ceilingThis kind of roof is beautiful and colorful, with a strong sense of three-dimensionality. It is suitable for ballrooms, restaurants, foyers, etc. It is necessary to pay attention to the relationship between the primary and secondary relationships and the height difference of various concavo-convex layers. It is not appropriate to change too much and emphasize the rhythm of rhythm and the artistry of the overall space. .(3) Suspended ceilingV arious flaps, flat plates or other types of ceilings are hung under the roof load-bearing structures. These ceilings are often used to meetacoustic or lighting requirements or to pursue certain decorative effects. They are often used in stadiums, cinemas, and so on. In recent years, this type of roof has also been commonly used in restaurants, cafes, shops, and other buildings to create special aesthetics and interests.(4) Well format ceilingIt is in the form of a combined structural beam, in which the main and secondary beams are staggered and the relationship between the wells and beams, together with a ceiling of lamps and gypsum floral designs, is simple and generous, with a strong sense of rhythm.(5) Glass ceilingThe halls and middle halls of modern large-scale public buildings are commonly used in this form, mainly addressing the needs of large-scale lighting and indoor greening, making the indoor environment richer in natural appeal, and adding vitality to large spaces. It is generally in the form of a dome, a cone, and a zigzag. In short, interior decoration design is a comprehensive discipline, involving many disciplines such as sociology, psychology, and environmental science, and there are many things that we need to explore and study. This article mainly elaborated the basic principles and design methods of interior decoration design. No matter what style belongs to the interior design door, this article gives everyone a more in-depth understanding and comprehension of interior design. If there are inadequacies, let the criticism correct me.中文译文室内装饰简述Y Miyazaki一室内装饰设计要素1 空间要素空间的合理化并给人们以美的感受是设计基本的任务。

附录一、英文原文：Detecting Anomaly Traf?c using Flow Data in the realVoIP networkI. INTRODUCTIONRecently, many SIP[3]/RTP[4]-based VoIP applications and services haveappeared and their penetration ratio is gradually increasing due to the freeor cheap call charge and the easy subscription method. Thus, some of the subscribers to the PSTN service tend to change their home telephone servicesto VoIP products. For example, companies in Korea such as LGDacom, SamsungNet- works, and KT have begun to deploy SIP/RTP-based VoIP services. It is reportedthat more than ?ve million users have subscribed the commercial VoIP servicesand 50% of all the users are joined in 2009 in Korea [1]. According to IDC, itis expected that the number of VoIP users in US will increase to 27 millionsin 2009 [2]. Hence, as the VoIP service becomes popular, it is not surprisingthat a lot of VoIP anomaly traf ?c has been already known [5]. So, Most commercial service such as VoIP services should provide essential security functions regarding privacy, authentication, integrity and non-repudiation for preventing malicious traf ?c. Particu- larly, most of current SIP/RTP-based VoIP servicessupply the minimal security function related with authentication. Though secure transport-layer protocols such as Transport Layer Security (TLS) [6] or Secure RTP(SRTP) [7] have been standardized, they have not been fully implemented anddeployed in current VoIP applications because of the overheads of implementation and performance. Thus, un-encrypted VoIP packets could be easily sniffed andforged, especially in wireless LANs. In spite of authentication,the authentication keys such as MD5in the SIP header could be maliciously exploited, because SIP is a text-based protocol and unencrypted SIP packets are easilydecoded. Therefore, VoIP services are very vulnerable to attacks exploiting SIP and RTP. We aim at proposing a VoIP anomaly traf ?c detection method using the?ow-based traf ?c measurement archi-tecture. We consider three representativeVoIP anomalies called CANCEL,BYEDenial of Service (DoS) and RTP?ooding attacks in this paper, because we found that malicious users in wireless LANcould easily perform these attacks in the real VoIP network. For monitoring VoIP packets,we employ the IETF IP Flow Information eXport (IPFIX) [9] standard that is based on NetFlow v9. This traf ?c measurement method provides a ?exible and extensible template structure for various protocols, which is useful for observing SIP/RTP ?ows [10]. In order to capture and export VoIP packets into IPFIX ?ows, we de?ne two additional IPFIX templates for SIP and RTP ?ows. Furthermore, we add four IPFIX ?elds to observe packets which are necessary to detect VoIP source spoo?ng attacks in WLANs.II. RELATED WORK[8] proposed a ?ooding detection method by the Hellinger Distance (HD) concept. In [8], they have pre- sented INVITE, SYN and RTP?ooding detection meth-ods.The HD is the difference value between a training data set and a testing dataset. The training data set collected traf?c over n sampling period of duration testing data set collected traf?c next the training data set in the sameperiod. If the HD is close to ‘1’, this testing data set is regarded as anomaly traf ?c. For using this method, they assumed that initial training data set didnot have any anomaly traf ?c. Since this method was based on packet counts, itmight not easily extended to detect other anomaly traf ?c except ?ooding. On the other hand, [11] has proposed a VoIP anomaly traf ?c detection method using Extended Finite State Machine (EFSM). [11] has suggested INVITE ?ooding, BYEDoS anomaly traf ?c and media spamming detection methods. However, the statemachine required more memory because it had to maintain each ?ow. [13] has presented NetFlow-based VoIP anomaly detection methods for INVITE, REGIS-TER,RTP?ooding, and REGISTER/INVITEscan. How-ever, the VoIP DoSattacks consideredin this paper were not considered. In [14], an IDS approach to detect SIPanomalies was developed, but only simulation results are presented. For monitoring VoIP traf ?c, SIPFIX [10] has been proposed as an IPFIX extension.The key ideas of the SIPFIX are application-layer inspection and SDP analysisfor carrying media session information. Yet, this paper presents only the possibility of applying SIPFIX to DoS anomaly traf ?c detection and prevention. Wedescribed the preliminary idea of detecting VoIP anomaly traf ?c in [15]. This paper elaborates BYEDoSanomaly traf ?c and RTP?ooding anomaly traf ?c detec-tion method based on IPFIX. Based on [15], we have considered SIP and RTP anomalytraf ?c generated in wireless LAN. In this case, it is possible to generate thesimiliar anomaly traf ?c with normal VoIP traf ?c, because attackers can easilyextract normal user information from unencrypted VoIP packets. In this paper,we have extended the idea with additional SIP detection methods using informationof wireless LAN packets. Furthermore, we have shown the real experiment resultsat the commercial VoIP network.III. THE VOIP ANOMALY TRAFFIC DETECTION METHOD A. CANCEL DoS Anomaly Traf ?c DetectionAs the SIP INVITE message is not usually encrypted, attackers could extract ?elds necessary to reproduce the forged SIP CANCELmessage by snif ?ng SIP INVITE packets, especially in wireless LANs. Thus, wecannot tell the difference between the normal SIP CANCEL message and the replicated one, because the faked CANCEL packet includes the normal ?elds inferred from the SIP INVITE message. Theattacker will perform the SIP CANCELDoS attack at the samewireless LAN, because the purpose of the SIP CANCELattack is to prevent the normal call estab-lishment when a victim is waiting for calls. Therefore, as soon as the attacker catchesa call invitation message for a victim, it will send a SIP CANCELmessage, which makes the call establishment failed. Wehave generated faked SIP CANCELmessage using sniffed a SIP INVITE in SIP header of this CANCEL message is the sameas normal SIP CANCEL message, because the attacker can obtain the SIP header?eld from unencrypted normal SIP message in wireless LANenvironment. Therefore it is impossible to detect the CANCEL DoS anomaly traf ?c using SIP headers, we use the different values of the wireless LANframe. That is, the sequence number in the frame will tell the difference between a victim host and an attacker.Welook into source MACaddress and sequence number in the MAC frame including a SIP CANCEL messageas shown in Algorithm 1. We compare the source MAC address of SIP CANCEL packets with that of the previously saved SIP INVITE ?ow. If the source MAC address of a SIP CANCEL ?ow is changed, it will be highly probablethat the CANCEL packet is generated by a unknown user. However, the source MAC address could be spoofed. Regarding source spoo ?ng detection, we employ the method in [12] that uses sequence numbers of frames. We calculate the gapbetween n-th and (n-1)-th frames. As the sequence number ?eld in a MAC header uses 12 bits, it varies from 0 to 4095. When we ?nd that the sequence number gap between a single SIP ?ow is greater than the threshold value of N that willbe set from the experiments, we determine that the SIP host address as beenspoofed for the anomaly traf ?c.B. BYE DoS Anomaly Traf ?c DetectionIn commercial VoIP applications, SIP BYE messages use the same authentication ?eld is included in the SIP IN-VITE message for security andaccounting purposes. How-ever, attackers can reproduce BYEDoS packets through snif ?ng normal SIP INVITE packets in wireless faked SIP BYE message is samewith the normal SIP BYE. Therefore, it is dif ?cult to detect the BYEDoS anomaly traf ?c using only SIP header snif ?ng SIP INVITE message, the attacker at the same or different subnets could terminate the normal in- progress call, because it could succeed in generating a BYE message to the SIP proxy server. In theSIP BYE attack, it is dif ?cult to distinguish from the normal call termination procedure. That is, we apply the timestamp of RTP traf ?c for detecting the SIP BYE attack. Generally, after normal call termination, the bi-directional RTP?ow is terminated in a bref space of time. However, if the call terminationprocedure is anomaly, we can observe that a directional RTP media ?ow is still ongoing, whereas an attacked directional RTP?ow is broken. Therefore, in order to detect the SIP BYE attack, we decide that we watch a directional RTP ?ow for a long time threshold of N sec after SIP BYEmessage. The threshold of N is also set from the 2 explains the procedure to detect BYE DoS anomal traf ?c using captured timestamp of the RTPpacket. Wemaintain SIP session information between clients with INVITE and OK messages including the same Call-ID and 4-tuple(source/destination IP Address and port number) of the BYEpacket. Weset a time threshold value by adding Nsec to the timestamp value of the BYE message. Thereason why we use the captured timestamp is that a few RTP packets are observed under second. If RTP traf ?c is observed after the time threshold, this willbe considered as a BYE DoS attack, because the VoIP session will be terminatedwith normal BYEmessages. C. RTPAnomaly Traf ?c Detection Algorithm 3 describes an RTP ?ooding detection method that uses SSRC and sequence numbers of the RTP header. During a single RTPsession, typically, the sameSSRCvalue is maintained. If SSRCis changed, it is highly probable that anomaly has occurred. In addition,if there is a big sequence number gap between RTP packets, we determine thatanomaly RTPtraf ?c has happened. As inspecting every sequence number for a packet is dif ?cult, we calculate the sequence number gap using the ?rst, last, maximum and minimum sequence numbers. In the RTP header, the sequence number ?eld uses 16 bits from 0 to 65535. When we observe a wide sequence number gap in our algorithm, we consider it as an RTP ?ooding attack.IV. PERFORMANCE EVALUATIONA. Experiment EnvironmentIn order to detect VoIP anomaly traf ?c, we established an experimental environment as ?gure 1. In this envi-ronment, we employed two VoIP phones with wireless LANs, one attacker, a wireless access router and an IPFIX ?ow collector.For the realistic performance evaluation, we directly used one of the workingVoIP networks deployed in Korea where an 11-digit telephone number (070-XXXX-XXXX) has been assigned to a SIP wireless SIP phones supporting ,we could make calls to/from the PSTNor cellular phones. In the wireless access router, we used two wireless LAN cards- one is to support the AP service, andthe other is to monitor packets. Moreover, in order to observe VoIP packetsin the wireless access router, we modi ?ed nProbe [16], that is an open IPFIX?ow generator, to create and export IPFIX ?ows related with SIP, RTP, and information. As the IPFIX collector, we have modi ?ed libip ?x so that it could provide the IPFIX ?ow decoding function for SIP, RTP, and templates. We used MySQL for the ?ow DB.B. Experimental ResultsIn order to evaluate our proposed algorithms, we gen-erated 1,946 VoIP callswith two commercial SIP phones and a VoIP anomaly traf ?c generator. Table I showsour experimental results with precision, recall, and F-score that is the harmonic mean of precision and recall. In CANCEL DoS anomaly traf ?c detection, our algorithm represented a few false negative cases, which was related with thegap threshold of the sequence number in MAC header. The average of the F-score value for detecting the SIP CANCEL anomaly is %.For BYE anomaly tests, wegenerated 755 BYEmes-sages including 118 BYEDoSanomalies in the exper-iment. The proposed BYE DoS anomaly traf ?c detec-tion algorithm found 112 anomalieswith the F-score of %. If an RTP?ow is terminated before the threshold, we regard the anomaly ?ow as a normal one. In this algorithm, we extract RTP sessioninformation from INVITE and OK or session description messages using the sameCall-ID of BYE message. It is possible not to capture those packet, resultingin a few false-negative cases. The RTP ?ooding anomaly traf ?c detection experiment for 810 RTP sessions resulted in the F score of 98%.The reason offalse-positive cases was related with the sequence number in RTP header. If the sequence number of anomaly traf ?c is overlapped with the range of the normaltraf ?c, our algorithm will consider it as normal traf ?c.V. CONCLUSIONSWe have proposed a ?ow-based anomaly traf ?c detec-tion method against SIP and RTP-based anomaly traf ?c in this paper. We presented VoIP anomaly traf ?c detection methods with ?ow data on the wireless access router. Weused the IETF IPFIX standard to monitor SIP/RTP ?ows passing through wireless access routers, because its template architecture is easily extensible to several protocols.For this purpose, we de ?ned two new IPFIX templates for SIP and RTP traf ?c and four new IPFIX ?elds for traf ?c. Using these IPFIX ?ow templates,we proposed CANCEL/BYE DoS and RTP?ooding traf ?c detection algorithms. From experimental results on the working VoIP network in Korea, we showed that our method is able to detect three representative VoIP attacks on SIP phones. In CANCEL/BYE DoS anomaly traf ?cdetection method, we employed threshold values about time and sequence numbergap for class ?cation of normal and abnormal VoIP packets. This paper has notbeen mentioned the test result about suitable threshold values. For the futurework, we will show the experimental result about evaluation of thethreshold values for our detection method.二、英文翻译：交通流数据检测异常在真实的世界中使用的VoIP 网络一.介绍最近 , 许多 SIP[3],[4]基于服务器的VoIP应用和服务出现了,并逐渐增加他们的穿透比及由于自由和廉价的通话费且极易订阅的方法。

外文文献翻译(含：英文原文及中文译文)英文原文Hydraulic systemW Arnold1 IntroductionThe hydraulic station is called a hydraulic pump station and is an independent hydraulic device. It is step by step to supply oil. And control the direction of hydraulic oil flow, pressure and flow, suitable for the host and hydraulic equipment can be separated on the various hydraulic machinery.After the purchase, the user only needs to connect the hydraulic station and the actuator (hydraulic or oil motor) on the mainframe with different tubings. The hydraulic machine can realize various specified actions and working cycles.The hydraulic station is a combination of manifolds, pump units or valve assemblies, electrical boxes, and tank electrical boxes. Each part function is:The pump unit is equipped with a motor and an oil pump, which is the power source of the hydraulic station and can convert mechanical energy into hydraulic oil pressure energy.V alve combination - its plate valve is mounted on the vertical plate, and the rear plate is connected with the same function as the manifold.Oil manifolds - assembled from hydraulic valves and channel bodies. It regulates hydraulic oil pressure, direction and flow.Box--a semi-closed container for plate welding. It is also equipped with an oil screen, an air filter, etc., which is used for cooling and filtering of oil and oil.Electrical box - divided into two types: one is to set the external lead terminal board; one is equipped with a full set of control appliances.The working principle of the hydraulic station: The motor drives the oil pump to rotate, then the pump sucks oil from the oil tank and supplies oil, converts the mechanical energy into hydraulic pressure energy, and the hydraulic oil passes through the manifold (or valve assembly) to adjust the direction, pressure and flow and then passes through the external tube. The way to the hydraulic cylinder or oil motor in the hydraulic machinery, so as to control the direction of the hydraulic motor, the strength of the speed and speed, to promote all kinds of hydraulic machinery to do work.(1) Development history of hydraulic pressureThe development history of hydraulics (including hydraulic power, the same below), pneumatics, and seals industry in China can be roughly divided into three stages, namely: the starting stage in the early 1950s to the early 60s; and the professional in the 60s and 70s. The growth stage of the production system; the 80-90's is a stage of rapid development. Among them, the hydraulic industry began in the early 1950s with thedevelopment of hydraulic machines such as Grinding Machines, broaching machines, and profiling lathes, which were produced by the machine tool industry. The hydraulic components were produced by the hydraulic workshop in the machine tool factory, and were produced for self use. After entering the 1960s, the application of hydraulic technology was gradually promoted from the machine tool to the agricultural machinery and engineering machinery. The original hydraulic workshop attached to the main engine plant was independent and became a professional manufacturer of hydraulic components. In the late 1960s and early 1970s, with the continuous development of mechanization of production, particularly in the provision of highly efficient and automated equipment for the second automobile manufacturing plant, the hydraulic component manufacturing industry witnessed rapid development. The batch of small and medium-sized enterprises also began to become specialized manufacturers of hydraulic parts. In 1968, the annual output of hydraulic components in China was close to 200,000 pieces. In 1973, in the fields of machine tools, agricultural machinery, construction machinery and other industries, the professional factory for the production of hydraulic parts has grown to over 100, and its annual output exceeds 1 million pieces. Such an independent hydraulic component manufacturing industry has taken shape. At this time, the hydraulic product has evolved from the original imitation Su product intoa combination of imported technology and self-designed products. The pressure has been developed towards medium and high pressures, and electro-hydraulic servo valves and systems have been developed. The application of hydraulics has been further expanded. The pneumatic industry started a few years later than hydraulics, and it was only in 1967 that it began to establish a professional pneumatic components factory. Pneumatic components began to be manufactured and sold as commodities. Its sealing industry including rubber seals, flexible graphite seals, and mechanical seals started from the production of common O-rings, oil seals, and other extruded rubber seals and asbestos seal products in the early 1950s. In the early 1960s, it began to develop and produce flexible products. Graphite seals and mechanical seals and other products. In the 1970s, a batch of batches of professional production plants began to be established one after another in the systems of the former Ministry of Combustion, the Ministry of Agriculture, and the Ministry of Agricultural Machinery, formally forming the industry, which laid the foundation for the development of the seal industry.In the 1980s, under the guidance of the national policy of reform and opening up, with the continuous development of the machinery industry, the contradiction between the basic components lags behind the host computer has become increasingly prominent and caused the attention of all relevant departments. To this end, the former Ministry of Machinesestablished the General Infrastructure Industry Bureau in 1982, and unified the original pneumatic, hydraulic, and seal specialties that were scattered in the industries of machine tools, agricultural machinery, and construction machinery, etc. The management of a piece of office, so that the industry in the planning, investment, the introduction of technology and scientific research and development and other aspects of the basic parts of the bureau's guidance and support. This has entered a period of rapid development, it has introduced more than 60 foreign advanced technology, of which more than 40 hydraulic, pneumatic 7, after digestion and absorption and technological transformation, are now mass production, and has become the industry's leading products . In recent years, the industry has intensified its technological transformation. From 1991 to 1998, the total investment of national, local, and corporate self-raised funds totaled about 2 billion yuan, of which more than 1.6 billion were hydraulic. After continuous technological transformation and technological breakthroughs, the technical level of a group of major enterprises has been further improved, and technological equipment has also been greatly improved, laying a good foundation for forming a high starting point, specialization, and mass production. In recent years, under the guidance of the principle of common development of multiple ownership systems in the country, various small and medium-sized enterprises with different ownership have rapidly emerged and haveshown great vitality. With the further opening up of the country, foreign-funded enterprises have developed rapidly, which plays an important role in raising industry standards and expanding exports. So far China has established joint ventures with famous manufacturers in the United States, Germany, Japan and other countries or directly established piston pumps/motors, planetary speed reducers, hydraulic control valves, steering gears, hydraulic systems, hydrostatic transmissions, and hydraulic components. The company has more than 50 manufacturing enterprises such as castings, pneumatic control valves, cylinders, gas processing triplets, rubber seals, and mechanical seals, and has attracted more than 200 million U.S. dollars in foreign capital.(2) Current statusBasic profileAfter more than 40 years of hard work, China's hydraulics, pneumatics and seals industry has formed a complete industrial system with a certain level of production capacity and technical level. According to the statistics of the third n ational industrial census in 1995, China’s state-owned, privately-owned, cooperative, village-run, individual, and “funded enterprises” have annual sales income of more than 1 million yuan in hydraulic, pneumatic, and seal industrial townships and above. There are a total of more than 1,300 companies, including about 700 hydraulics, and about 300 pneumatic and sealing parts. According to thestatistics of the international industry in 1996, the total output value of the hydraulic industry in China was about 2.448 billion yuan, accounting for the 6th in the world; the total output value of the pneumatic industry was about 419 million yuan, accounting for the world’s10 people.2. Current supply and demand profileWith the introduction of technology, independent development and technological transformation, the technical level of the first batch of high-pressure plunger pumps, vane pumps, gear pumps, general hydraulic valves, oil cylinders, oil-free pneumatic components and various types of seals has become remarkable. Improve, and can be stable mass production, provide guarantees for all types of host to improve product quality. In addition, certain achievements have also been made in the aspects of CAD, pollution control, and proportional servo technology for hydraulic pneumatic components and systems, and have been used for production. So far, the hydraulic, pneumatic and seal products have a total of about 3,000 varieties and more than 23,000 specifications. Among them, there are about 1,200 types of hydraulic pressure, more than 10,000 specifications (including 60 types of hydrodynamic products, 500 specifications); about 1350 types of pneumatic, more than 8,000 specifications; there are also 350 types of rubber seals, more than 5000 The specifications are now basically able to adapt to the general needs ofvarious types of mainframe products. The matching rate for major equipment sets can reach more than 60%, and a small amount of exports has started.In 1998, the domestic production of hydraulic components was 4.8 million pieces, with sales of about 2.8 billion yuan (of which mechanical systems accounted for 70%); output of pneumatic components was 3.6 million pieces, and sales were about 550 million yuan (including mechanical systems accounting for about 60%) The production of seals is about 800 million pieces, and the sales volume is about 1 billion yuan (including about 50% of mechanical systems). According to the statistics of the annual report of the China Hydraulic and Pneumatic Sealing Industry Association in 1998, the production and sales rate of hydraulic products was 97.5% (101% of hydraulic power), 95.9% of air pressure, and 98.7% of seal. This fully reflects the basic convergence of production and sales.Although China's hydraulic, pneumatic and sealing industries have made great progress, there are still many gaps compared with the development needs of the mainframe and the world's advanced level, which are mainly reflected in the variety, performance and reliability of products. . Take hydraulic products as an example, the product varieties are only 1/3 of the foreign country, and the life expectancy is 1/2 of that of foreign countries. In order to meet the needs of key hosts, imported hosts, and majortechnical equipment, China has a large number of imported hydraulic, pneumatic, and sealing products every year. According to customs statistics and relevant data analysis, in 1998, the import volume of hydraulic, pneumatic and seal products was about 200 million U.S. dollars, of which the hydraulic pressure was about 140 million U.S. dollars, the pneumatics were 30 million U.S. dollars, and the seal was about 0.3 billion U.S. dollars. The year is slightly lower. In terms of amount, the current domestic market share of imported products is about 30%. In 1998, the total demand for hydraulic parts in the domestic market was about 6 million pieces, and the total sales volume was 4 billion yuan; the total demand for pneumatic parts was about 5 million pieces, and the total sales volume was over 700 million yuan; the total demand for seals was about 1.1 billion yuan. Pieces, total sales of about 1.3 billion yuan. (3) Future developments1. The main factors affecting development(1) The company's product development capability is not strong, and the level and speed of technology development can not fully meet the current needs for advanced mainframe products, major technical equipment and imported equipment and maintenance;(2) Many companies have lagged behind in manufacturing process, equipment level and management level, and their sense of quality is not strong, resulting in low level of product performance, unstable quality,poor reliability, and insufficiency of service, and lack of user satisfaction. And trusted branded products;(3) The degree of professional specialization in the industry is low, the power is scattered, the duplication of the low level is serious, the product convergence between the region and the enterprise leads to blind competition, and the prices are reduced each other, thus the efficiency of the enterprise is reduced, the funds are lacking, and the turnover is difficult. Insufficient investment in development and technological transformation has severely restricted the overall level of the industry and its competitive strength.(4) When the degree of internationalization of the domestic market is increasing, foreign companies have gradually entered the Chinese market to participate in competition, coupled with the rise of domestic private, cooperative, foreign-funded, and individual enterprises, resulting in increasing impact on state-owned enterprises. .2. Development trendWith the continuous deepening of the socialist market economy, the relationship between supply and demand in the hydraulic, pneumatic and sealed products has undergone major changes. The seller market characterized by “shortage” has basically become a buyer’s market characterized by “structured surplus”. Replaced by. From the perspective of overall capacity, it is already in a trend of oversupply, and in particular,general low-grade hydraulic, pneumatic and seals are generally oversupply; and like high-tech products with high technological content and high value and high value-added products that are urgently needed by the host, Can not meet the needs of the market, can only rely on imports. After China's entry into the WTO, its impact may be greater. Therefore, during the “10th Five-Y ear Plan” period, the growth of the industry’s output value must not only rely on the growth of quantity. Instead, it should focus on the structural contradiction of the industry and intensify efforts to adjust the industrial structure and product structure. It should be based on the improvement of quality. Product technology upgrades in order to adapt to and stimulate market demand, and seek greater development.2. Hydraulic application on power slide(1) Introduction of Power Sliding TableUsing the binding force curve diagram and the state space analysis method to analyze and study the sliding effect and the smoothness of the sliding table of the combined machine tool, the dynamics of the hydraulic drive system of the sliding table—the self-regulating back pressure regulating system are established. mathematical model. Through the digital simulation system of the computer, the causes and main influencing factors of the slide impact and the motion instability are analyzed. What kind of conclusions can be drawn from those, if we canreasonably design the structural dimensions of hydraulic cylinders and self-regulating back pressure regulators ——The symbols used in the text are as follows:s 1 - flow source, that is, the flow rate of the governor valve outlet;S el —— sliding friction of the sliding table;R - the equivalent viscous friction coefficient of the slide;I 1 - quality of slides and cylinders;12 - self-adjusting back pressure valve core quality;C 1, c 2 - liquid volume without cylinder chamber and rod chamber;C 2 - Self-adjusting back pressure valve spring compliance;R 1, R2 - Self-adjusting back pressure valve damping orifice fluid resistance;R 9 - Self-adjusting back pressure valve valve fluid resistance;S e2——initial pre-tightening force of self-adjusting back pressure valve spring;I 4, I5 - Equivalent liquid sense of the pipeline;C 5, C 6 - equivalent liquid capacity of the pipeline;R 5, R7 - Equivalent liquid resistance of the pipeline;V 3, V4 - cylinder rodless cavity and rod cavity volume;P 3, P4—pressure of the rodless cavity and rod cavity of the cylinder;F - the slide bears the load;V - speed of slide motion;In this paper, the power bond diagram and the state space splitting method are used to establish the system's motion mathematical model, and the dynamic characteristics of the slide table can be significantly improved.In the normal operation of the combined machine tool, the magnitude of the speed of the slide, its direction and the load changes it undergoes will affect its performance in varying degrees. Especially in the process of work-in-process, the unsteady movement caused by the advancing of the load on the slide table and the cyclical change of the load will affect the surface quality of the workpiece to be machined. In severe cases, the tool will break. According to the requirements of the Dalian Machine Tool Plant, the author used the binding force curve diagram and the state space analysis method to establish a dynamic mathematical model of a self-adjusting back pressure and speed adjustment system for the new hydraulic drive system of the combined machine tool slide. In order to improve the dynamic characteristics of the sliding table, it is necessary to analyze the causes and main influencing factors of the impetus and movement of the sliding table. However, it must pass the computer's digital simulation and the final results obtained from the research.(2) Dynamic Mathematical ModelThe working principle diagram of the self-adjusting back pressure speedregulation system of the combined machine tool slide hydraulic drive system is shown in the figure. This system is used to complete the work-cycle-stop-rewind. When the sliding table is working, the three-position four-way reversing valve is in the illustrated position. The oil supply pressure of the oil pump will remain approximately constant under the effective action of the overflow valve, and the oil flow passes through the reversing valve and adjusts the speed. The valve enters the rodless chamber of the cylinder to push the slide forward. At the same time, the pressurized oil discharged from the rod chamber of the cylinder will flow back to the tank through the self-regulating back pressure valve and the reversing valve. During this process, there was no change in the operating status of both the one-way valve and the relief valve. The complex and nonlinear system of the hydraulic drive system of the self-adjusting back pressure governor system is a kind of self-adjusting back-pressure governor system. To facilitate the study of its dynamic characteristics, a simple and reasonable dynamic mathematical model that only considers the main influencing factors is established. Especially important [1][2]. From the theoretical analysis and the experimental study, we can see that the system process time is much longer than the process time of the speed control valve. When the effective pressure bearing area of the rodless cavity of the fuel tank is large, the flow rate at the outlet of the speed control valve is instantaneous. The overshoot is reflected in thesmall change in speed of the slide motion [2]. In order to further broaden and deeply study the dynamic characteristics of the system so that the research work can be effectively performed on a miniature computer, this article will further simplify the original model [2], assuming that the speed control valve is output during the entire system pass. When the flow is constant, this is considered to be the source of the flow. The schematic diagram of the dynamic model structure of this system is shown in Fig. 2. It consists of a cylinder, a sliding table, a self-adjusting back pressure valve, and a connecting pipe.The power bond graph is a power flow graph. It is based on the transmission mode of the system energy, based on the actual structure, and uses the centralized parameters to represent the role of the subsystems abstractly as a resistive element R, a perceptual element I, and a capacitive element. Three kinds of role of C. Using this method, the physical concept of modeling is clear, and combined with the state-space analysis method, the linear system can be described and analyzed more accurately. This method is an effective method to study the dynamic characteristics of complex nonlinear systems in the time domain. According to the main characteristics of each component of the self-adjusting back pressure control system and the modeling rules [1], the power bond diagram of the system is obtained. The upper half of each key in the figure represents the power flow. The two variables that makeup the power are the force variables (oil pressure P and force F) and the flow variables (flow q and velocity v). The O node indicates that the system is connected in parallel, and the force variables on each key are equal and the sum of the flow variables is zero; 1 The nodes represent the series connection in the system, the flow variables on each key are equal and the sum of the force variables is Zero. TF denotes a transformer between different energy forms. The TF subscripted letter represents the conversion ratio of the flow variable or the force variable. The short bar on the key indicates the causal relationship between the two variables on the key. The full arrow indicates the control relationship. There are integral or differential relationships between the force and flow variables of the capacitive and perceptual elements in the three types of action elements. Therefore, a complex nonlinear equation of state with nine state variables can be derived from Fig. 3 . In this paper, the research on the dynamic characteristics of the sliding table starts from the two aspects of the slide's hedging and the smoothness of the motion. The fourth-order fixed-length Runge-Kutta is used for digital simulation on the IBM-PC microcomputer.(3) Slide advanceThe swaying phenomenon of the slide table is caused by the sudden disappearance of the load acting on the slide table (such as drilling work conditions). In this process, the table load F, the moving speed V, and thepressure in the two chambers of the cylinder P3 and P4 can be seen from the simulation results in Fig. 4. When the sliding table moves at a uniform speed under the load, the oil pressure in the rodless cavity of the oil cylinder is high, and a large amount of energy is accumulated in the oil. When the load suddenly disappears, the oil pressure of the cavity is rapidly reduced, and the oil is rapidly reduced. When the high-pressure state is transferred to the low-pressure state, a lot of energy is released to the system, resulting in a high-speed forward impact of the slide. However, the front slide of the sliding table causes the pressure in the rod cavity of the oil cylinder to cause the back pressure to rise, thereby consuming part of the energy in the system, which has a certain effect on the kicking of the slide table. We should see that in the studied system, the inlet pressure of the self-adjusting back pressure valve is subject to the comprehensive effect of the two-chamber oil pressure of the oil cylinder. When the load suddenly disappears, the pressure of the self-adjusting back pressure valve rapidly rises and stably exceeds the initial back pressure value. It can be seen from the figure that self-adjusting back pressure in the speed control system when the load disappears, the back pressure of the cylinder rises more than the traditional speed control system, so the oil in the rod cavity of the cylinder absorbs more energy, resulting in the amount of forward momentum of the slide It will be about 20% smaller than traditionalspeed control systems. It can be seen from this that the use of self-adjusting back-gear speed control system as a drive system slider has good characteristics in suppressing the forward punch, in which the self-adjusting back pressure valve plays a very large role.(4) The smoothness of the slideWhen the load acting on the slide changes periodically (such as in the case of milling), the speed of the slide will have to fluctuate. In order to ensure the processing quality requirements, it must reduce its speed fluctuation range as much as possible. From the perspective of the convenience of the discussion of the problem, assume that the load changes according to a sine wave law, and the resulting digital simulation results are shown in Figure 5. From this we can see that this system has the same variation rules and very close numerical values as the conventional speed control system. The reason is that when the change of the load is not large, the pressure in the two chambers of the fuel tank will not have a large change, which will eventually lead to the self-regulating back pressure valve not showing its effect clearly.(5) Improvement measuresThe results of the research show that the dynamic performance of a sliding table with self-regulating back pressure control system as a drive system is better than that of a traditional speed control system. To reduce the amount of kick in the slide, it is necessary to rapidly increase the backpressure of the rod cavity when the load disappears. To increase the smoothness of the sliding table, it is necessary to increase the rigidity of the system. The main measure is to reduce the volume of oil. From the system structure, it is known that the cylinder has a large volume between the rod cavity and the oil discharge pipe, as shown in Fig. 6a. Its existence in terms of delay and attenuation of the self-regulating back pressure valve function, on the other hand, also reduces the rigidity of the system, it will limit the further improvement of the propulsion characteristics and the smoothness of the motion. Thus, improving the dynamic characteristics of the sliding table can be handled by two methods: changing the cylinder volume or changing the size of the self-regulating back pressure valve. Through the simulation calculation of the structural parameters of the system and the comparison of the results, it can be concluded that the ratio of the volume V4 between the rod cavity and the oil discharge pipe to the volume V3 between the rodless cavity and the oil inlet pipe is changed from 5.5 to 5.5. At 1 oclock, as shown in the figure, the diameter of the bottom end of the self-adjusting back pressure valve is increased from the original 10mm to 13mm, and the length of the damper triangle groove is reduced from the original lmm to 0.7mm, which will enable the front of the slide table. The impulse is reduced by 30%, the transition time is obviously shortened, and the smoothness of the slide motion will also be greatly improved.中文译文液压系统W Arnold1. 绪论液压站称液压泵站,是独立的液压装置。

外文文献翻译(含：英文原文及中文译文)文献出处：Nuclear Instruments & Methods in Physics Research, 2015, 3(2):281-294.英文原文Importance of construction organization designG BaeckerAbstractDuring the construction process of a construction project, the advantages and disadvantages of the construction organization scheme not only directly affect the quality of the project, but also have an important impact on the duration and the safety of the personnel during the construction process. The construction organization is an important technical and economic document for the project construction and guidance of project construction. Can adjust the contradiction of personnel, machinery, raw materials, environment, process, equq)ment9 civil construction, installation, management, production, etc. in construction. It is necessary to supervise and control the construction organization design so as to ensure the project quality with high quality, low cost, and lessEnergy consumption is conpleted.Key words: Project Management, Construction Organization, Program ImportanceConstruction organization design is the conception and specific arrangement of the entire construction process of the engineering construction project. It is the core and soul of the construction organization management work. Its purpose is to make the project faster, better quality, and more efficient. Make the whole project get relatively optimal results in the construction.1.The reason for the importance of the design of construction organizationThe construction project and its construction have three characteristics: fixed and fluidity, diversity and individuality, large body and long construction period. Therefore, the construction of each construction project must be carried out. This is because: The production of other general industrial products has its own fixed, long-term factory. The construction of the building is fluid, and it is impossible to establish such a factory. It is only when each construction project is constructed that a corresponding, temporary construction site preparation like thenature of the plant is employed・The unique features of construction and the characteristics of construction mobility determine that each construction project must select the appropriate equipment and labor organization. The selection of construction methods, the formulation of construction technology plans, and the organization of workforces and implements are collectively referred to as construction work capacity allocation. The characteristics of the construction cycle have determined that the supply of various labors, equq)ment and many materials and materials technologies will take a long time・ This will result in the construction and design of materials and technologies that are compatible with the overall construction schedule・From this we can see that construction organization design is very important in project management.2.The importance of construction organization designAs a product, building products play an extremely important role in project management throughout the construction process. The construction organization of the engineering construction project has a close relationship with its engineering cost. The basic contents of the construction organization design include:project overview and construction condition analysis, construction plan, construction process, construction schedule plan, and general plan of construction. There are also economic analysis and construction preparation work plans. Among them, the determination of the construction plan and construction process is more important. For examp le, the selection of construction machinery, the selection of horizontal transportation methods, the construction methods of the earthwork, the construction methods of the main structure and the selection of the construction technology all directly affect the project budget. The price changes・ Under the premise of guaranteeing project quality and satisfying the owners use requirements and construction period requirements, optimizing the construction plan and construction process is an important measure and method to control investment and reduce construction project cost2.1The construction organization plan affects the quality of the project to a great extent. Therefore, a reasonable project organization plan is not only the basis for ensuring the successful completion of the project, but also the basis for project safety. The construction organization design is an important part of theconstruction engineering design documents・ It is the main basis for prq)aring the project investment budget and the main reference for the preparation of bidding documents・ Therefore, careful construction of the construction organization will have a very important role in determining the project cost and reducing the investment in the project, which will help control the construction cost.2.2The construction organization plan is an important means for scientific management of construction activities. It has the dual role of strategic deployment and tactical arrangements・ It embodies the requirements for realizing the basic construction plan and design, provides the contents of the construction preparation work in each phase, and coordinates the mutual relations between each construction work area, each construction work type, and each voluntary work in the construction process. The construction organization plan must be able to determine the basic combination of various factors of production based on the characteristics and requirements of the engineering product and the current and possible winning construction conditions. It is impossible to carry out any production without effectively solvingthe problem・・3.Index calculation and analysis of construction organizationdesignAt present, what indicators should be established in the construction organization design are not uniform and the calculation method is not standardized・ As it is a yardstick for evaluating the overall effect of construction organization design and evaluation of implementation status, it is also the basis for examining the level and effect of production, operation and management of the unit (project department) that undertakes construction. We should pay attention to the following suggestions ・3. 1 indicator system. The index system should be set up to reflect the level reached by the construction organization's design goals and provide convenience for evaluation, assessment, and implementation.3. 2 Index calculations・(1) Construction preparation period. From the start of site preparation to the full time of formal project start-up. (2) Unit project duration. The construction period arranged by the unit construction schedule・(3) Labor。

中英文对照外文翻译文献(文档含英文原文和中文翻译)原文：Heat treatment of metalThe generally accepted definition for heat treating metals and metal alloys is “heating and cooling a solid metal or alloy in a way so as to obtain specific conditions or properties.” Heating for the sole purpose of hot working (as in forging operations) is excluded from this definition．Likewise，the types of heat treatment that are sometimes used for products such as glass or plastics are also excluded from coverage by this definition．Transformation CurvesThe basis for heat treatment is the time-temperature-transformation curves or TTT curves where，in a single diagram all the three parameters are plotted．Because of the shape of the curves，they are also sometimes called C-curves or S-curves．To plot TTT curves，the particular steel is held at a given temperature and the structure is examined at predetermined intervals to record the amount of transformation taken place．It is known that the eutectoid steel (T80) under equilibrium conditions contains，all austenite above 723℃，whereas below，it is the pearlite．To form pearlite，the carbon atoms should diffuse to form cementite．The diffusion being a rate process，would require sufficient time for complete transformation of austenite to pearlite．From different samples，it is possible to note the amount of the transformation taking place at any temperature．These points are then plotted on a graph with time and temperature as the axes．Through these points，transformation curves can be plotted as shown in Fig.1 for eutectoid steel．The curve at extreme left represents the time required for the transformation of austenite to pearlite to start at any given temperature．Similarly，the curve at extreme right represents the time required for completing the transformation．Between the two curves are the pointsrepresenting partial transformation. The horizontal lines Ms and Mf represent the start and finish of martensitic transformation.Classification of Heat Treating ProcessesIn some instances，heat treatment procedures are clear-cut in terms of technique and application．whereas in other instances，descriptions or simple explanations are insufficient because the same technique frequently may be used to obtain different objectives．For example, stress relieving and tempering are often accomplished with the same equipment and by use of identical time and temperature cycles．The objectives，however，are different for the two processes． The following descriptions of the principal heat treating processes are generally arranged according to their interrelationships．Normalizing consists of heating a ferrous alloy to a suitable temperature (usually 50°F to 100°F or 28℃ to 56℃) above its specific upper transformation temperature．This is followed by cooling in still air to at least some temperature well below its transformation temperature range．For low-carbon steels, the resulting structure and properties are the same as those achieved by full annealing；for most ferrous alloys, normalizing and annealing are not synonymous.Normalizing usually is used as a conditioning treatment, notably for refining the grains of steels that have been subjected to high temperatures for forging or other hot working operations. The normalizing process usually is succeeded by another heat treating operation such as austenitizing for hardening, annealing, or tempering.Annealing is a generic term denoting a heat treatment that consists of heating to and holding at a suitable temperature followed by cooling at a suitable rate. It is used primarily to soften metallicmaterials, but also to simultaneously produce desired changes in other properties or in microstructure. The purpose of such changes may be, but is not confined to, improvement of machinability, facilitation of cold work (known as in-process annealing), improvement of mechanical or electrical properties, or to increase dimensional stability. When applied solely to relive stresses, it commonly is called stress-relief annealing, synonymous with stress relieving.When the term “annealing” is applied to ferrous alloys without qualification, full annealing is applied. This is achieved by heating above the alloy’s transformation temperature, then applying a cooling cycle which provides maximum softness. This cycle may vary widely, depending on composition and characteristics of the specific alloy.Quenching is a rapid cooling of a steel or alloy from the austenitizing temperature by immersing the work piece in a liquid or gaseous medium. Quenching medium commonly used include water, 5% brine, 5% caustic in an aqueous solution, oil, polymer solutions, or gas (usually air or nitrogen).Selection of a quenching medium depends largely on the hardenability of material and the mass of the material being treating (principally section thickness).The cooling capabilities of the above-listed quenching media vary greatly. In selecting a quenching medium, it is best to avoid a solution that has more cooling power than is needed to achieve the results, thus minimizing the possibility of cracking and warp of the parts being treated. Modifications of the term quenching include direct quenching, fog quenching, hot quenching, interrupted quenching, selective quenching, spray quenching, and time quenching.Tempering. In heat treating of ferrous alloys, tempering consists of reheating the austenitized and quench-hardened steel or iron to some preselected temperature that is below the lower transformation temperature (generally below 1300 ℃ or 705 ℃ ). Tempering offers a means of obtaining various combinations of mechanical properties. Tempering temperatures used for hardened steels are often no higher than 300 ℃(150 ℃). The term “tempering” should not be confused with either process annealing or stress relieving. Even though time and temperature cycles for the three processes may be the same, the conditions of the materials being processed and the objectives may be different.Stress relieving. Like tempering, stress relieving is always done by heating to some temperature below the lower transformation temperature for steels and irons. For nonferrous metals, the temperature may vary from slightly above room temperature to several hundred degrees, depending on the alloy and the amount of stress relief that is desired.The primary purpose of stress relieving is to relieve stresses that have been imparted to the workpiece from such processes as forming, rolling, machining or welding. The usual procedure is toheat workpiece to the pre-established temperature long enough to reduce the residual stresses (this is a time-and temperature-dependent operation) to an acceptable level; this is followed by cooling at a relatively slow rate to avoid creation of new stresses.The generally accepted definition for heat treating metals and metal alloys is “heating and cooling a solid metal or alloy in a way so as to obtain specific conditions or properties.” Heating for the sole purpose of hot working (as in forging operations) is excluded from this definition．Likewise，the types of heat treatment that are sometimes used for products such as glass or plastics are also excluded from coverage by this definition．Transformation CurvesThe basis for heat treatment is the time-temperature-transformation curves or TTT curves where，in a single diagram all the three parameters are plotted．Because of the shape of the curves，they are also sometimes called C-curves or S-curves．To plot TTT curves，the particular steel is held at a given temperature and the structure is examined at predetermined intervals to record the amount of transformation taken place．It is known that the eutectoid steel (T80) under equilibrium conditions contains，all austenite above 723℃，whereas below，it is pearlite．To form pearlite，the carbon atoms should diffuse to form cementite．The diffusion being a rate process，would require sufficient time for complete transformation of austenite to pearlite．From different samples，it is possible to note the amount of the transformation taking place at any temperature．These points are then plotted on a graph with time and temperature as the axes．Through these points，transformation curves can be plotted as shown in Fig.1 for eutectoid steel．The curve at extreme left represents the time required for the transformation of austenite to pearlite to start at any given temperature．Similarly，the curve at extreme right represents the time required for completing the transformation．Between the two curves are the points representing partial transformation. The horizontal lines Ms and Mf represent the start and finish of martensitic transformation.Classification of Heat Treating ProcessesIn some instances，heat treatment procedures are clear-cut in terms of technique and application．whereas in other instances，descriptions or simple explanations are insufficient because the same technique frequently may be used to obtain different objectives．For example, stress relieving and tempering are often accomplished with the same equipment and by use of identical time and temperature cycles．The objectives，however，are different for the two processes．The following descriptions of the principal heat treating processes are generally arranged according to their interrelationships．Normalizing consists of heating a ferrous alloy to a suitable temperature (usually 50°F to 100°F or 28℃ to 56℃) above its specific upper transformation temperature．This is followed by cooling in still air to at least some temperature well below its transformation temperature range．For low-carbon steels, the resulting structure and properties are the same as those achieved by full annealing；for most ferrous alloys, normalizing and annealing are not synonymous.Normalizing usually is used as a conditioning treatment, notably for refining the grains of steels that have been subjected to high temperatures for forging or other hot working operations. The normalizing process usually is succeeded by another heat treating operation such as austenitizing for hardening, annealing, or tempering.Annealing is a generic term denoting a heat treatment that consists of heating to and holding at a suitable temperature followed by cooling at a suitable rate. It is used primarily to soften metallic materials, but also to simultaneously produce desired changes in other properties or in microstructure. The purpose of such changes may be, but is not confined to, improvement of machinability, facilitation of cold work (known as in-process annealing), improvement of mechanical or electrical properties, or to increase dimensional stability. When applied solely to relive stresses, it commonly is called stress-relief annealing, synonymous with stress relieving.When the term “annealing” is applied to ferrous alloys without qualification, full annealing is applied. This is achieved by heating above the alloy’s transformation temperature, then applying a cooling cycle which provides maximum softness. This cycle may vary widely, depending on composition and characteristics of the specific alloy.Quenching is a rapid cooling of a steel or alloy from the austenitizing temperature by immersing the workpiece in a liquid or gaseous medium. Quenching medium commonly used include water, 5% brine, 5% caustic in an aqueous solution, oil, polymer solutions, or gas (usually air or nitrogen).Selection of a quenching medium depends largely on the hardenability of material and the mass of the material being treating (principally section thickness).The cooling capabilities of the above-listed quenching media vary greatly. In selecting aquenching medium, it is best to avoid a solution that has more cooling power than is needed to achieve the results, thus minimizing the possibility of cracking and warp of the parts being treated. Modifications of the term quenching include direct quenching, fog quenching, hot quenching, interrupted quenching, selective quenching, spray quenching, and time quenching.Tempering. In heat treating of ferrous alloys, tempering consists of reheating the austenitized and quench-hardened steel or iron to some preselected temperature that is below the lower transformation temperature (generally below 1300 ℃ or 705 ℃). Tempering offers a means of obtaining various combinations of mechanical properties. Tempering temperatures used for hardened steels are often no higher than 300 ℃(150 ℃). The term “tempering” should not be confused with either process annealing or stress relieving. Even though time and temperature cycles for the three processes may be the same, the conditions of the materials being processed and the objectives may be different.Stress relieving. Like tempering, stress relieving is always done by heating to some temperature below the lower transformation temperature for steels and irons. For nonferrous metals, the temperature may vary from slightly above room temperature to several hundred degrees, depending on the alloy and the amount of stress relief that is desired.The primary purpose of stress relieving is to relieve stresses that have been imparted to the workpiece from such processes as forming, rolling, machining or welding. The usual procedure is to heat workpiece to the pre-established temperature long enough to reduce the residual stresses (this is a time-and temperature-dependent operation) to an acceptable level; this is followed by cooling at a relatively slow rate to avoid creation of new stresses.The generally accepted definition for heat treating metals and metal alloys is “heating and cooling a solid metal or alloy in a way so as to obtain specific conditions or properties.” Heating for the sole purpose of hot working (as in forging operations) is excluded from this definition．Likewise，the types of heat treatment that are sometimes used for products such as glass or plastics are also excluded from coverage by this definition．Transformation CurvesThe basis for heat treatment is the time-temperature-transformation curves or TTT curves where，in a single diagram all the three parameters are plotted．Because of the shape of the curves，they are also sometimes called C-curves or S-curves．To plot TTT curves，the particular steel is held at a given temperature and the structure is examined at predetermined intervals to record the amount of transformation taken place．It is known that the eutectoid steel (T80) under equilibrium conditions contains，all austenite above 723℃，whereas below，it is pearlite．To form pearlite，the carbon atoms should diffuse to form cementite．The diffusion being a rate process，would require sufficient time for complete transformation of austenite to pearlite．From different samples，it is possible to note the amount of the transformation taking placeat any temperature．These points are then plotted on a graph with time and temperature as the axes．Through these points，transformation curves can be plotted as shown in Fig.1 for eutectoid steel．The curve at extreme left represents the time required for the transformation of austenite to pearlite to start at any given temperature．Similarly，the curve at extreme right represents the time required for completing the transformation．Between the two curves are the points representing partial transformation. The horizontal lines Ms and Mf represent the start and finish of martensitic transformation.Classification of Heat Treating ProcessesIn some instances，heat treatment procedures are clear-cut in terms of technique and application．whereas in other instances，descriptions or simple explanations are insufficient because the same technique frequently may be used to obtain different objectives．For example, stressrelieving and tempering are often accomplished with the same equipment and by use of identical time and temperature cycles．The objectives，however，are different for the two processes．The following descriptions of the principal heat treating processes are generally arranged according to their interrelationships．Normalizing consists of heating a ferrous alloy to a suitable temperature (usually 50°F to 100°F or 28℃ to 56℃) above its specific upper transformation temperature．This is followed by cooling in still air to at least some temperature well below its transformation temperature range．For low-carbon steels, the resulting structure and properties are the same as those achieved by full annealing；for most ferrous alloys, normalizing and annealing are not synonymous.Normalizing usually is used as a conditioning treatment, notably for refining the grains of steels that have been subjected to high temperatures for forging or other hot working operations. The normalizing process usually is succeeded by another heat treating operation such as austenitizing for hardening, annealing, or tempering.Annealing is a generic term denoting a heat treatment that consists of heating to and holding at a suitable temperature followed by cooling at a suitable rate. It is used primarily to soften metallic materials, but also to simultaneously produce desired changes in other properties or in microstructure. The purpose of such changes may be, but is not confined to, improvement of machinability, facilitation of cold work (known as in-process annealing), improvement of mechanical or electrical properties, or to increase dimensional stability. When applied solely to relive stresses, it commonly is called stress-relief annealing, synonymous with stress relieving.When the term “annealing” is applied to ferrous alloys without qualification, full annealing is applied. This is achieved by heating above the alloy’s transformation temperature, then applying a cooling cycle which provides maximum softness. This cycle may vary widely, depending on composition and characteristics of the specific alloy.Quenching is a rapid cooling of a steel or alloy from the austenitizing temperature by immersing the workpiece in a liquid or gaseous medium. Quenching medium commonly used include water, 5% brine, 5% caustic in an aqueous solution, oil, polymer solutions, or gas (usually air or nitrogen).Selection of a quenching medium depends largely on the hardenability of material and the mass of the material being treating (principally section thickness).The cooling capabilities of the above-listed quenching media vary greatly. In selecting a quenching medium, it is best to avoid a solution that has more cooling power than is needed to achieve the results, thus minimizing the possibility of cracking and warp of the parts being treated. Modifications of the term quenching include direct quenching, fog quenching, hot quenching, interrupted quenching, selective quenching, spray quenching, and time quenching.Tempering. In heat treating of ferrous alloys, tempering consists of reheating the austenitized and quench-hardened steel or iron to some preselected temperature that is below the lower transformation temperature (generally below 1300 ℃ or 705 ℃). Tempering offers a means of obtaining various combinations of mechanical properties. Tempering temperatures used for hardened steels are often no higher than 300 oF (150 ℃). The term “tempering” should not be confused with either process annealing or stress relieving. Even though time and temperature cycles for the three processes may be the same, the conditions of the materials being processed and the objectives may be different.Stress relieving. Like tempering, stress relieving is always done by heating to some temperature below the lower transformation temperature for steels and irons. For nonferrous metals, the temperature may vary from slightly above room temperature to several hundred degrees, depending on the alloy and the amount of stress relief that is desired.The primary purpose of stress relieving is to relieve stresses that have been imparted to the workpiece from such processes as forming, rolling, machining or welding. The usual procedure is to heat workpiece to the pre-established temperature long enough to reduce the residual stresses (this is a time-and temperature-dependent operation) to an acceptable level; this is followed by cooling at a relatively slow rate to avoid creation of new stresses.金属热处理对于热处理金属和金属合金普遍接受的定义是对于热处理金属和金属合金普遍接受的定义是“加热和冷却的方式了坚实的金“加热和冷却的方式了坚实的金属或合金，以获得特定条件或属性为唯一目的。

外文文献翻译(含：英文原文及中文译文)文献出处：Y Hassan. Geometric Design of Highways[J] Advances in Transportation Studies, 2016, 6(1):31-41.英文原文Geometric Design of HighwaysY HassanA. Alignment DesignThe alignment of a road is shown on the plane view and is a series of straight lines called tangents connected by circular curves. In modern practice it is common to interpose transition or spiral curves between tangents and circular curves.The line shape should be continuous, sudden changes from flat line to small radius curve or sudden change of long line end connected to small radius curve should be avoided, otherwise a traffic accident may occur. Similarly, arcs with different radii end-to-end (complex curves) or short straight lines between two arcs with different radii are bad lines unless an easing curve is inserted between arcs. The long, smooth curve is always a good line because it is beautifully lined and will not be abandoned in the future. However, it is not ideal that the two-way road line shape is composed entirely of curves, because some drivers always hesitate to pass through curved road segments. The long and slow curve is used in thesmaller corners. If you use a short curve, you will see "kinks." In addition, the design of the flat and vertical sections of the line should be considered comprehensively and should not be only one. No matter which, for example, when the starting point of the flat curve is near the vertex of the vertical curve, serious traffic accidents will occur.V ehicles driving on curved sections are subjected to centrifugal force, and they need a force of the same magnitude in the opposite direction due to the height and lateral friction to offset it. From the viewpoint of highway design, the high or horizontal friction cannot exceed a certain value. The maximum, these control values for a certain design speed may limit the curvature of the curve. In general, the curvature of a circular curve is represented by its radius. For the linear design, the curvature is often described by the curvature, ie, the central angle corresponding to the 100-foot curve, which is inversely proportional to the radius of the curve.A normal road arch is set in a straight section of the road, and the curve section is set to a super high, and an excessively gradual road section must be set between the normal section and the super high section. The usual practice is to maintain the design elevation of each midline of the road unchanged. By raising the outer edge and lowering the inner edge to form a super high, for the line shape where the straight line is directly connected with the circle curve, the super high should never start on the straight line before reaching the curve. At the other end of the curve at acertain distance to reach all the ultra-high.If the vehicle is driving at a high speed on a restricted section of road, such as a straight line connected with a small radius circle curve, driving will be extremely uncomfortable. When the car enters the curve section, the super high starts and the vehicle tilts inward, but the passenger must maintain the body because it is not subjected to centrifugal force at this time. When the car reaches the curve section, centrifugal force suddenly occurs, forcing passengers to make further posture adjustments. When the car leaves the curve, the above process is just the opposite. After inserting the relaxation curve, the radius gradually transitions from infinity to a certain fixed value on the circle curve, the centrifugal force gradually increases, and ultra-high levels are carefully set along the relaxation curve, and the centrifugal force is gradually increased, thereby avoiding driving bumps.The easement curve has been used on railways for many years, but it has recently been applied on highways. This is understandable. The train must follow a precise orbit, and the uncomfortable feeling mentioned above can only be eliminated after the ease curve is used. However, the driver of a car can change the lateral position on the road at will, and he can provide a relaxation curve for himself by making a roundabout curve. But doing this in one lane (sometimes in other lanes) is very dangerous. A well-designed relaxation curve makes the above roundaboutnessunnecessary. Multi-cluster safety is a measure, and roads are widely used as transition curves.For a circular curve with the same radius, adding an easing curve at the end will change the relative positions of the curve and the straight line. Therefore, whether or not to use an easing curve should be determined before final alignment survey. The starting point of the general curve is labeled PC or BC and the end point is labeled PT or EC. For curves with transition curves, the usual marker configurations are: TC, SC, CS, and ST.For two-way roads, the road width should be increased at sharp bends. This is mainly based on the following factors: 1. The driver is afraid to get out of the edge of the road. 2. Due to the difference in the driving trajectory of the front and rear wheels of the vehicle, the effective lateral width of the vehicle increases; 3. The width of the front of the vehicle that is inclined relative to the centerline of the road. For roads that are 24 feet wide, the added width is negligible. Only if the design speed is 30 mil / h and the curvature is up to 2 ft. However, for narrow roads, widening is very important even on smooth curve sections. The recommended widening values and widened designs are shown in ". Highway linear design."B. Longitudinal slope lineThe vertical alignment of the highway and its impact on the safety andeconomy of vehicle operation constitute one of the most important elements in highway design. V ertical lines consist of straight lines and vertical parabolas or circular lines called vertical slope lines. When a grade line rises gradually from a horizontal line, it is called an uphill, and vice versa, it is called a downhill slope. In the analysis of slope and slope control, designers usually have to study the effect of changes in slope on the midline profile. In determining the slope, the ideal situation is the balance of excavation and filling, and there is no large amount of borrowers and abandoned parties. All the earth moving is carried down as far as possible and the distance is not long. The slope should change with the terrain and be consistent with the direction of ascent and descent of the existing drainage system. In the mountains, the slopes should be balanced to minimize the total cost. In the plain or grassland areas, the slope is approximately parallel to the surface, but higher than the surface at a sufficient height to facilitate drainage of the surface. If necessary, winds can be used to remove surface snow. If the road is approaching or running along a river, the current height of the slope is determined by the expected flood level. In any case, the gentle slope should be set at the excavation section compared to the short vertical section connecting the short vertical curve due to the upslope downslope, and the section from the downslope upslope should be set at the fill. Road section. Such a good linear design can often avoid the formation of a mound or depressionopposite to the current landscape. Other considerations are much more important when determining the vertical slope line than when filling the balance. Study and make more detailed adjustments to advanced issues. In general, the slope of the design that is consistent with the existing conditions is better, which can avoid some unnecessary costs.In slope analysis and control, the impact of slope on motor vehicle operating costs is one of the most important considerations. As the slope increases, the fuel consumption will obviously increase and the speed will slow down. A more economical solution can balance the annual increase in the annual cost of reducing the slope and increasing the annual cost of running the vehicle without increasing the slope. The exact solution to this problem depends on the understanding of traffic flow and traffic type, which can only be known through traffic investigations.In different states, where the maximum longitudinal gradient is also very different, AASHTO recommends that the maximum longitudinal slope be selected based on the time and terrain. The current design has a maximum longitudinal gradient of 5% at a design speed of 70 mil / h. At a design speed of 30 mil / h, the maximum longitudinal slope is generally 7% - 12% depending on the topography.When using longer sustained climbs, the slope length cannot exceed the critical slope length when no slow-moving vehicle is provided. The critical slope length can vary from 1700 ft in 3% grade to 500 ft in 8%grade. The slope of the continuous long slope must be less than the maximum slope of any end surface of the highway. Usually the long continuous single slope is disconnected and the lower part is designed as a steep slope, while approaching the top of the slope allows the slope to decrease. At the same time, it is necessary to avoid obstruction of the view due to the inclination of the longitudinal section.The maximum longitudinal gradient of the highway is 9%. Only when the drainage of the road is a problem, if the water must be drained to the side ditch or the drainage ditch, the minimum gradient criterion is of importance. In this case, AASHTO recommends a minimum gradient of0.35%.C. sight distanceIn order to ensure the safety of driving, the road must be designed to have a sufficient distance in front of the driver's line of sight, so that they can avoid obstacles other than the obstacles, or safely overtake. The line-of-sight is the length of the road visible to the driver of the vehicle. Two meanings: "parking distance" or "non-passing sight distance" or "overtaking sight distance."No matter what happens, reasonable design requires the driver to see this danger outside a certain distance, and brake the car before hitting it. In addition, it is not safe to think that the vehicle can avoid danger by leaving the driving lane. Because this can cause the vehicle to lose controlor to collide with another car.The parking distance is composed of two parts: The first part is the distance that the driver takes before the driver finds an obstacle and brakes. In this detection and reaction phase, the vehicle travels at its initial speed; the second part is the driver’s Part of the pa rking distance depends on the speed of the vehicle and the driver's visual time and braking time. The second part of the parking distance depends on the speed, the brakes, the tires, the conditions of the road surface, and the line shape and slope of the road.Otherwise, the capacity of the highway will be reduced, and the accident will increase, because the irritable driver would risk a collision and overtake the vehicle if he cannot safely overtake the vehicle. The minimum distance in front of which the driver can safely be seen is called the overtaking distance.When making a decision on whether to pass or not, the driver must compare the visibility distance ahead and the distance required to complete the overtaking movement. The factors that influence him to make a decision are the degree of caution in driving and the acceleration performance of the vehicle. Due to the significant differences between humans, the overtaking behavior, which is mainly determined by human judgments and actions rather than the mechanical theorem, varies greatly from driver to driver. In order to establish the line-of-sight value forovertaking, engineers observed many drivers’ overtaking behavior. Between 1938 and 1941, a basic survey was established to establish a standard of over- sight distance. Assume that the operating conditions are as follows:1. It is driven at a uniform speed by the overtaking vehicle.2. Overtaking When entering the overtaking area, decelerate after being overtaken.3. When arriving at the overtaking area, the driver needs to observe the passing area for a short time and start overtaking.4. In the face of the opposite vehicle, the overtaking is completed in a delayed start-up and a hurried turn. In the overtaking process, overtaking accelerates in the overtaking lane and the average speed is 10 mil / h faster than being overtaken.5. When overtaking returns to its original lane, there must be a safe distance between it and the opposite vehicle on the other lane.The sum of the above five items is the over sight distance.中文译文公路线形设计作者：Y HassanA. 平面设计道路的线形反映在平面图上是由一系列的直线和与直线相连的圆曲线构成的。