附录
Engine plastic intake manifold application and
development trend
Because plastic products unique advantages, plastic intake manifold will become aluminium alloy intake manifold alternative products.
Since always, as the key components, domestic engine intake manifold are using aluminum alloy products. And according to understand, foreign plastic intake manifold application in a wide range, such as BMW, modern, nissan, which upscale automobile use plastic intake manifold.
According to the auto air-intake system manufacturing company a technology expert introduction, compared with traditional aluminum alloy intake manifold, plastic intake manifold weighs just for aluminum manifold 1/2, its at low speed, low load power, torque increase was can reach above 10%. Meanwhile, the airway smooth plastic intake maifold, improve the engine performance, compared with aluminium alloy manifold fuel can reduce 6% to 8%, in addition, still can improve engine performance and emission function, reduce engine noise, and with the aluminum alloy intake manifold interchangeability strong.
Domestic to automotive plastics intake manifold research startting evening, plastic intake manifold manufacturing and r&d technology is still in the blank, in this field technical level is low, its market share is less than 2%. Some of the country's auto manufacturers have to import from abroad plastic intake manifold high. "A technology expert says.
Changan group technology development center of a personage thinks, along with the market competition, reduce automobile manufacturing costs into the central focus of automobile enterprise, new materials, new technology products are more valued and cheap plastic intake manifold replace traditional heavy metal intake manifold become an inevitable trend. Meanwhile, plastic intake manifold demand, will accompany the increases production
car increases, its market prospect synchronization is nottaken lightly.
In recent years, functional plastic application in automobile engine has made breakthrough progress, more and more engine components to begin using a plastic material production, especially with plastic intake manifold replace metal intake manifold has become an inevitable trend of automobile engine.
With the traditional metal intake manifold, plastic intake manifold compared with what strengths?
Metal intake manifold generally USES is cast iron or alloy material. In order to satisfy the engine intake and efi system installation requirements, and in manufacturing complex metal intake manifold often faced manufacturing difficulties, its yield is very difficult to guarantee.
In 1990, the German BMW company USES molten core method successfully produce plastic intake manifold.
Later, plastic intake manifold with its light weight, low cost, performance is good wait for a characteristic quickly replaced the gold
Belong to intake manifold, become the new engine of choice. In European and American countries, about 90% of the exhaust from the opposite side of naturally aspirated engines use plastic intake manifold. Specifically, the plastic intake manifold main With four advantages:
(1) in weight, because plastic intake manifold generally USES the nylon PA66 material, the proportion is about 50% of aluminum alloy material.
(2) in addition, the thickness of the plastic intake manifold for 2.5 ~ 3mm commonly, and aluminum alloy intake manifold wall thickness generally greater than 4mm. Therefore, plastic intake manifold weight relative to light many, usually only for aluminum alloy around 40% of the intake manifold.
(3) in power, because plastic intake manifold wall smoother, therefore to improve air filling quantity. Compared with aluminium alloy the intake manifold, engine performance can improve the 3% ~ 5%.
(4) in the economic aspect, plastic intake manifold brings good airflow, thus helping to gasoline engine cylinder in full within the engine burn, the fuel consumption and emissions could have been improved obviously.
(5) in cost, although the intake manifold of plastic materials used with aluminum alloy material cost basic same, but because plastic intake manifold can once moldings, forming the rate of high, while the aluminum alloy casting and into the yield of inlet manifold blank much lower, and the machining cost is relatively high, therefore plastic intake manifold production usually cost more than aluminum alloy intake manifold low 20% ~ 35%.
At present, the plastic intake manifold preferred materials are nylon. Nylon is the advantage of high temperature resistant, chemical stability, but its shortcoming is larger, the percentage of ethylene glycol resistance performance also not too good, and its water is too strong, bibulous the strength will decline after nylon nearly 40%. Therefore, the widely-spreading use increased 25% ~ 35% of PA6 or PA66 fiberglass reinforced polyamide. Nylon before joining fiberglass, its shrinkage after obviously improved. For internal including cooling channel intake manifold, suggest using special anti glycol nylon formula.
Although the world many plastic material supplier in continuously develops new intake manifold plastic materials, plastic materials in order to enhance the various performance, but nylon material is still the best choice at present.
Plastic intake manifold production process
Currently the world what are the main types of plastic intake manifold production technology? What are the strengths and weaknesses of each?
At present more mature plastic intake manifold processing technology is mainly molten core injection molding technology and vibration friction welding technology. The two technologies have different features.
(1) molten core injection technology is the earliest, the most mature used plastic intake manifold production process. Its principle is: use the low melting point of solder alloy intake manifold inner cavity, and then the core nuclear assembly into a mold, again to mold to infuse nylon. Injection molding process is completed, a by nylon molding the shapes of the intake manifold in upcoming lumen core nuclear claddings inside. At this time, with internal metal core nuclear inlet manifold into melting in the pool, to make metal core nuclear melting. Because of the metal core nuclear melting point lower (generally), and nylon 110 ℃the melting point of relatively high, so in internal core in the process of nuclear melting plastic intake manifold
Shape remain unchanged.
Molten core method produce plastic intake manifold advantage is: intake manifold wall complete smooth, thereby improving the gas liquidity, can maximize the engine performance; Because be once the intake manifold injection molding, good air-tightness, high-yield; Molten core process can eliminate plastic intake manifold in injection molding process produces the residual stress, making intake manifold has better mechanical properties.
Molten core method shortcoming is: in the metal core nuclear fusion molten core and core process, to consume large amounts of energy, thus make molten core method the cost of producing plastic intake manifold are relatively high.
(2) vibration friction welding technology is also called "more pieces of welding method". When the intake manifold in design plastic complex structure, can be in the intake manifold due to relatively simple, can a structure of the injection molding, then two or more pieces of each piece by friction welder welding up, to form a complete plastic intake manifold.
At present, most plastic intake manifold manufacturers are using vibration friction welding technology. Its main advantage is: high production efficiency, low cost. Its defect is the weld seams low intensity, appearance is bad, gas liquidity are relatively poor.
Plastic intake manifold domestic production status
Plastic intake manifold of the nationalization process can be roughly divided into three stages:
The first stage for imported stage. In the early 1990s, as some of the establishment of joint venture automobile enterprises, foreign advanced product line with the engine was introduced some introduction of domestic cars. In this one phase, plastic intake manifold as engine, its core of important component technology from foreign party control, imports cost is high.
The second phase is mainly for some enterprises directly in domestic production. At this stage, the foreign-capital enterprise in foreign plastic intake manifold production line and complete mould to the home, use of domestic and cheap labor, for in the domestic provide matching the webuton of plastic intake manifold, and plastic intake manifold design &development work still at abroad.
The third stage, with the domestic automobile manufacturing technology advances, some domestic enterprise started plastic intake manifold research and development work.
Plastic intake manifold is a kind of high-tech products, including many engine aspects of key technology. But at present domestic most plastic intake manifold production enterprise past just ordinary plastic products factory, most of them do not have design and production engine technical ability, it could only be modelled some have outdated plastic intake manifold, their technical level the good and bad are intermingled.
Overall, the current domestic production of plastic intake manifold ubiquitous technology level is low, and can not meet the requirements engine.
毕业设计（论文）外文参考文献及译文 英文题目Component-based Safety Computer of Railway Signal Interlocking System 中文题目模块化安全铁路信号计算机联锁系统 学院自动化与电气工程学院 专业自动控制 姓名葛彦宁 学号 200808746 指导教师贺清 2012年5月30日
Component-based Safety Computer of Railway Signal Interlocking System 1 Introduction Signal Interlocking System is the critical equipment which can guarantee traffic safety and enhance operational efficiency in railway transportation. For a long time, the core control computer adopts in interlocking system is the special customized high-grade safety computer, for example, the SIMIS of Siemens, the EI32 of Nippon Signal, and so on. Along with the rapid development of electronic technology, the customized safety computer is facing severe challenges, for instance, the high development costs, poor usability, weak expansibility and slow technology update. To overcome the flaws of the high-grade special customized computer, the U.S. Department of Defense has put forward the concept：we should adopt commercial standards to replace military norms and standards for meeting consumers’demand [1]. In the meantime, there are several explorations and practices about adopting open system architecture in avionics. The United Stated and Europe have do much research about utilizing cost-effective fault-tolerant computer to replace the dedicated computer in aerospace and other safety-critical fields. In recent years, it is gradually becoming a new trend that the utilization of standardized components in aerospace, industry, transportation and other safety-critical fields. 2 Railways signal interlocking system 2.1 Functions of signal interlocking system The basic function of signal interlocking system is to protect train safety by controlling signal equipments, such as switch points, signals and track units in a station, and it handles routes via a certain interlocking regulation. Since the birth of the railway transportation, signal interlocking system has gone through manual signal, mechanical signal, relay-based interlocking, and the modern computer-based Interlocking System. 2.2 Architecture of signal interlocking system Generally, the Interlocking System has a hierarchical structure. According to the function of equipments, the system can be divided to the function of equipments; the system
forced concrete structure reinforced with an overviewRein Since the reform and opening up, with the national economy's rapid and sustained development of a reinforced concrete structure built, reinforced with the development of technology has been great. Therefore, to promote the use of advanced technology reinforced connecting to improve project quality and speed up the pace of construction, improve labor productivity, reduce costs, and is of great significance. Reinforced steel bars connecting technologies can be divided into two broad categories linking welding machinery and steel. There are six types of welding steel welding methods, and some apply to the prefabricated plant, and some apply to the construction site, some of both apply. There are three types of machinery commonly used reinforcement linking method primarily applicable to the construction site. Ways has its own characteristics and different application, and in the continuous development and improvement. In actual production, should be based on specific conditions of work, working environment and technical requirements, the choice of suitable methods to achieve the best overall efficiency. 1、steel mechanical link 1.1 radial squeeze link Will be a steel sleeve in two sets to the highly-reinforced Department with superhigh pressure hydraulic equipment (squeeze tongs) along steel sleeve radial squeeze steel casing, in squeezing out tongs squeeze pressure role of a steel sleeve plasticity deformation closely integrated with reinforced through reinforced steel sleeve and Wang Liang's Position will be two solid steel bars linked Characteristic: Connect intensity to be high, performance reliable, can bear high stress draw and pigeonhole the load and tired load repeatedly.
https://www.doczj.com/doc/334638030.html,/finance/company/consumer.html Consumer finance company The consumer finance division of the SG group of France has become highly active within India. They plan to offer finance for vehicles and two-wheelers to consumers, aiming to provide close to Rs. 400 billion in India in the next few years of its operations. The SG group is also dealing in stock broking, asset management, investment banking, private banking, information technology and business processing. SG group has ventured into the rapidly growing consumer credit market in India, and have plans to construct a headquarters at Kolkata. The AIG Group has been approved by the RBI to set up a non-banking finance company (NBFC). AIG seeks to introduce its consumer finance and asset management businesses in India. AIG Capital India plans to emphasize credit cards, mortgage financing, consumer durable financing and personal loans. Leading Indian and international concerns like the HSBC, Deutsche Bank, Goldman Sachs, Barclays and HDFC Bank are also waiting to be approved by the Reserve Bank of India to initiate similar operations. AIG is presently involved in insurance and financial services in more than one hundred countries. The affiliates of the AIG Group also provide retirement and asset management services all over the world. Many international companies have been looking at NBFC business because of the growing consumer finance market. Unlike foreign banks, there are no strictures on branch openings for the NBFCs. GE Consumer Finance is a section of General Electric. It is responsible for looking after the retail finance operations. GE Consumer Finance also governs the GE Capital Asia. Outside the United States, GE Consumer Finance performs its operations under the GE Money brand. GE Consumer Finance currently offers financial services in more than fifty countries. The company deals in credit cards, personal finance, mortgages and automobile solutions. It has a client base of more than 118 million customers throughout the world
Inventory management Inventory Control On the so-called "inventory control", many people will interpret it as a "storage management", which is actually a big distortion. The traditional narrow view, mainly for warehouse inventory control of materials for inventory, data processing, storage, distribution, etc., through the implementation of anti-corrosion, temperature and humidity control means, to make the custody of the physical inventory to maintain optimum purposes. This is just a form of inventory control, or can be defined as the physical inventory control. How, then, from a broad perspective to understand inventory control? Inventory control should be related to the company's financial and operational objectives, in particular operating cash flow by optimizing the entire demand and supply chain management processes (DSCM), a reasonable set of ERP control strategy, and supported by appropriate information processing tools, tools to achieved in ensuring the timely delivery of the premise, as far as possible to reduce inventory levels, reducing inventory and obsolescence, the risk of devaluation. In this sense, the physical inventory control to achieve financial goals is just a means to control the entire inventory or just a necessary part; from the perspective of organizational functions, physical inventory control, warehouse management is mainly the responsibility of The broad inventory control is the demand and supply chain management, and the whole company's responsibility. Why until now many people's understanding of inventory control, limited physical inventory control? The following two reasons can not be ignored: First, our enterprises do not attach importance to inventory control. Especially those who benefit relatively good business, as long as there is money on the few people to consider the problem of inventory turnover. Inventory control is simply interpreted as warehouse management, unless the time to spend money, it may have been to see the inventory problem, and see the results are often very simple procurement to buy more, or did not do warehouse departments . Second, ERP misleading. Invoicing software is simple audacity to call it ERP, companies on their so-called ERP can reduce the number of inventory, inventory control, seems to rely on their small software can get. Even as SAP, BAAN ERP world, the field of
流动的：一个快速的，多平台的开放源码的同步化多媒体整合语言唱机Dick C.A. Bulterman, Jack Jansen, Kleanthis Kleanthous, Kees Blom and Daniel Benden CWI: Centrum voor Wiskunde en Informatica Kruislaan 413 1098 SJ Amsterdam, The Netherlands +31 20 592 43 00 Dick.Bulterman@cwi.nl 摘要： 本文概述了一个出现在早期的流动性的同步化多媒体唱机。不同于其它同步化的实现，早期的播放器是一个可重组的同步化引擎，可以定制作为一个实验媒体播放器的核心。同步化唱机是一个引用了同步化多媒体引擎并可以集成在一个广泛的媒体播放器的项目。本文是以我们要创造一个新的同步化引擎为动机的综述开始的。然后论述的是早期媒体播放器的核心架构（包括可扩展性，播放器自定义的集成装置）。我们以一个关于我们在windows，Mac，Linux版本应用于台式机以及PDA设备上实施流动性例子的体验的讨论结束。 类别和主题描述符： H.5.2 多媒体的信息系统。 H.5.4 超级文本/超级媒体。 一般词汇： 试验，性能，验证。 关键词： 同步化多媒体整合语言，唱机，公开源代码，演示。 1.动机： 早期公开的同步化媒体播放器是一个非常有特色的公开源代码的同步化 2.0播放器，它以研究团体的意图被使用（在我们的研究团体内外）目的是为了研究项目的团体在需要源代码的时候可以访问生产特性的同步化播放器的网站。它也被用作一个独立的不需要专有的媒体格式的同步化播放器使用，播放器支持一系列同步化2.0配置文件（包括台式机和移动的配置）可以被分配利用在Linux，Macintosh，windows系统的台式机，PDA设备和掌上电脑。 同时现存的几个同步化播放器，包括网络视频播放软件,IE浏览器,小型同步化播放器, GRiNS ,X- GRiNS ，以及各种各样专有移动设备，我们发展流动性唱机有三个原因： 准许制作数字以及个人或者课堂使用中的的全部硬拷贝即时没有提供拷贝权限或者商业性的利益分摊，而且在第一页有这种拷贝的注意事项。服务器上有关于复制以及翻版的分发列表的通知。需要事先明确具体的许可权以及费用。 'MM’04, October 10-16, 2004, New Y ork, New Y ork, USA. Copyright 2004 ACM 1-58113-893-8/04/0010...$5.00. 现有的同步化播放器没有提供一个完整同步化2.0播放器的正确实现。早期的播放器所有的同步化工具，是以同步化2.0语言的属性为基础加上扩展功能能够支持高级的动画以及规范可移动设备以3GPP/PSS-6同步化使用. 所有的同步化播放器都是针对商业SMIL表达专有媒介。早期的播发器使用开源的媒体解码器和开源的网络传输协议,以便播放器可以轻松定制广泛的使用范围的研究计划。 我们的目标是建立一个鼓励发展类似的多媒体研究输出的平台,，我们期望的是一个标准的基线播放器的供给,其他研究人员和开发机构可以集中精力到基线播放器的集成扩展(从新媒体的解码器或新的网络控制算法任何一个中)。这些扩展可以在其它的平台上被共享。 在2004年中期，与螺旋形客户机对照，同时移动到一个GPL核心，早期的播放器支持一个广阔的范围的同步化应用指标构架，它提供了一个准确实现的更完整的同步化语言，它在低资源配置下提供了更好的性能，提供了更多可扩展的媒体播放器架构。它也提供了一个包含所有媒体解码作为部分开放的客户基础。
中等分辨率制备分离的 快速色谱技术 W. Clark Still,* Michael K a h n , and Abhijit Mitra Departm(7nt o/ Chemistry, Columbia Uniuersity,1Veu York, Neu; York 10027 ReceiLied January 26, 1978 我们希望找到一种简单的吸附色谱技术用于有机化合物的常规净化。这种技术是适于传统的有机物大规模制备分离，该技术需使用长柱色谱法。尽管这种技术得到的效果非常好，但是其需要消耗大量的时间，并且由于频带拖尾经常出现低复原率。当分离的样本剂量大于1或者2g时，这些问题显得更加突出。近年来，几种制备系统已经进行了改进，能将分离时间减少到1-3h，并允许各成分的分辨率ΔR f≥（使用薄层色谱分析进行分析）。在这些方法中，在我们的实验室中，媒介压力色谱法1和短柱色谱法2是最成功的。最近，我们发现一种可以将分离速度大幅度提升的技术，可用于反应产物的常规提纯，我们将这种技术称为急骤色谱法。虽然这种技术的分辨率只是中等（ΔR f≥），而且构建这个系统花费非常低，并且能在10-15min内分离重量在的样本。4 急骤色谱法是以空气压力驱动的混合介质压力以及短柱色谱法为基础，专门针对快速分离，介质压力以及短柱色谱已经进行了优化。优化实验是在一组标准条件5下进行的，优化实验使用苯甲醇作为样本，放在一个20mm*5in.的硅胶柱60内，使用Tracor 970紫外检测器监测圆柱的输出。分辨率通过持续时间（r）和峰宽（w,w/2）的比率进行测定的（Figure 1），结果如图2-4所示，图2-4分别放映分辨率随着硅胶颗粒大小、洗脱液流速和样本大小的变化。
专业资料 学院： 专业：土木工程 姓名： 学号： 外文出处：Structural Systems to resist (用外文写) Lateral loads 附件：1.外文资料翻译译文；2.外文原文。
附件1：外文资料翻译译文 抗侧向荷载的结构体系 常用的结构体系 若已测出荷载量达数千万磅重，那么在高层建筑设计中就没有多少可以进行极其复杂的构思余地了。确实，较好的高层建筑普遍具有构思简单、表现明晰的特点。 这并不是说没有进行宏观构思的余地。实际上，正是因为有了这种宏观的构思，新奇的高层建筑体系才得以发展，可能更重要的是：几年以前才出现的一些新概念在今天的技术中已经变得平常了。 如果忽略一些与建筑材料密切相关的概念不谈，高层建筑里最为常用的结构体系便可分为如下几类： 1.抗弯矩框架。 2.支撑框架，包括偏心支撑框架。 3.剪力墙，包括钢板剪力墙。 4.筒中框架。 5.筒中筒结构。 6.核心交互结构。 7. 框格体系或束筒体系。 特别是由于最近趋向于更复杂的建筑形式，同时也需要增加刚度以抵抗几力和地震力，大多数高层建筑都具有由框架、支撑构架、剪力墙和相关体系相结合而构成的体系。而且，就较高的建筑物而言，大多数都是由交互式构件组成三维陈列。 将这些构件结合起来的方法正是高层建筑设计方法的本质。其结合方式需要在考虑环境、功能和费用后再发展，以便提供促使建筑发展达到新高度的有效结构。这并
不是说富于想象力的结构设计就能够创造出伟大建筑。正相反，有许多例优美的建筑仅得到结构工程师适当的支持就被创造出来了，然而，如果没有天赋甚厚的建筑师的创造力的指导，那么，得以发展的就只能是好的结构，并非是伟大的建筑。无论如何，要想创造出高层建筑真正非凡的设计，两者都需要最好的。 虽然在文献中通常可以见到有关这七种体系的全面性讨论，但是在这里还值得进一步讨论。设计方法的本质贯穿于整个讨论。设计方法的本质贯穿于整个讨论中。 抗弯矩框架 抗弯矩框架也许是低，中高度的建筑中常用的体系，它具有线性水平构件和垂直构件在接头处基本刚接之特点。这种框架用作独立的体系，或者和其他体系结合起来使用，以便提供所需要水平荷载抵抗力。对于较高的高层建筑，可能会发现该本系不宜作为独立体系，这是因为在侧向力的作用下难以调动足够的刚度。 我们可以利用STRESS，STRUDL 或者其他大量合适的计算机程序进行结构分析。所谓的门架法分析或悬臂法分析在当今的技术中无一席之地，由于柱梁节点固有柔性，并且由于初步设计应该力求突出体系的弱点，所以在初析中使用框架的中心距尺寸设计是司空惯的。当然，在设计的后期阶段，实际地评价结点的变形很有必要。 支撑框架 支撑框架实际上刚度比抗弯矩框架强，在高层建筑中也得到更广泛的应用。这种体系以其结点处铰接或则接的线性水平构件、垂直构件和斜撑构件而具特色，它通常与其他体系共同用于较高的建筑，并且作为一种独立的体系用在低、中高度的建筑中。
数据库外文参考文献及翻译 数据库外文参考文献及翻译数据库管理系统——实施数据完整性一个数据库，只有用户对它特别有信心的时候。这就是为什么服务器必须实施数据完整性规则和商业政策的原因。执行SQL Server的数据完整性的数据库本身，保证了复杂的业务政策得以遵循，以及强制性数据元素之间的关系得到遵守。因为SQL Server的客户机/服务器体系结构允许你使用各种不同的前端应用程序去操纵和从服务器上呈现同样的数据，这把一切必要的完整性约束，安全权限，业务规则编码成每个应用，是非常繁琐的。如果企业的所有政策都在前端应用程序中被编码，那么各种应用程序都将随着每一次业务的政策的改变而改变。即使您试图把业务规则编码为每个客户端应用程序，其应用程序失常的危险性也将依然存在。大多数应用程序都是不能完全信任的，只有当服务器可以作为最后仲裁者，并且服务器不能为一个很差的书面或恶意程序去破坏其完整性而提供一个后门。SQL Server使用了先进的数据完整性功能，如存储过程，声明引用完整性（DRI），数据类型，限制，规则，默认和触发器来执行数据的完整性。所有这些功能在数据库里都有各自的用途;通过这些完整性功能的结合，可以实现您的数据库的灵活性和易于管理，而且还安全。声明数据完整性声明数据完整原文请找腾讯3249114六,维-论'文.网 https://www.doczj.com/doc/334638030.html, 定义一个表时指定构成的主键的列。这就是所谓的主键约束。SQL Server使用主键约束以保证所有值的唯一性在指定的列从未侵犯。通过确保这个表有一个主键来实现这个表的实体完整性。有时，在一个表中一个以上的列（或列的组合）可以唯一标志一行，例如，雇员表可能有员工编号（ emp_id ）列和社会安全号码（ soc_sec_num ）列，两者的值都被认为是唯一的。这种列经常被称为替代键或候选键。这些项也必须是唯一的。虽然一个表只能有一个主键，但是它可以有多个候选键。 SQL Server的支持多个候选键概念进入唯一性约束。当一列或列的组合被声明是唯一的， SQL Server 会阻止任何行因为违反这个唯一性而进行的添加或更新操作。在没有故指的或者合适的键存在时，指定一个任意的唯一的数字作为主键，往往是最有效的。例如，企业普遍使用的客户号码或账户号码作为唯一识别码或主键。通过允许一个表中的一个列拥有身份属性，SQL Server可以更容易有效地产生唯一数字。您使用的身份属性可以确保每个列中的值是唯一的，并且值将从你指定的起点开始，以你指定的数量进行递增（或递减）。（拥有特定属性的列通常也有一个主键或唯一约束，但这不是必需的。）第二种类型的数据完整性是参照完整性。 SQL Server实现了表和外键约束之间的逻辑关系。外键是一个表中的列或列的组合，连接着另一个表的主键（或着也可能是替代键）。这两个表之间的逻辑关系是关系模型的基础;参照完整性意味着这种关系是从来没有被违反的。例如，一个包括出版商表和标题表的简单的select例子。在标题表中，列title_id （标题编号）是主键。在出版商表，列pub_id （出版者ID ）是主键。 titles表还包括一个pub_id列，这不是主键，因为出版商可以发布多个标题。相反， pub_id是一个外键，它对应着出版商表的主键。如果你在定义表的时候声明了这个关系， SQL Server由双方执行它。首先，它确保标题不能进入titles表，或在titles表中现有的pub_id无法被修改，除非有效的出版商ID作为新pub_id出现在出版商表中。其次，它确保在不考虑titles表中对应值的情况下，出版商表中的pub_id的值不做任何改变。以下两种方法可
新媒体营销外文翻译文献 (文档含英文原文和中文翻译) 译文: 研究微博中承诺和信用对消费者行为倾向的影响 ——基于关系营销的角度 摘要：本研究的目的是探索消费者对企业通过微博进行关系营销的观点。这项研究是以承诺-信用理论以及消费者对企业微博形象、承诺、信用、满意度和社群意识对消费者的行为倾向的研究为基础的。这项研究的成果可以成为企业利用微博进行关系营销的准则。这项研究显示消费者的满意度对承诺、信用、社群意识和消费者的行为倾向具有积极影响。企业形象对承诺和信用的影响是成立的，但对行为倾向的影响需须经由承诺和信用产生中介效果。信用对承诺和社群意识的影响是存在的，但是对行为倾向的影响须经由承诺和社群意识产生中介效果。最后，承诺和社群意识对行为倾向的影响是成立的。 关键词：微博、关系营销、满意度、企业形象、承诺、信用、社群意识、行为倾向 1、引言 当我们在新的经济时代面临着现今的商业环境时，许多企业在短时间内就变成了一个以顾客为中心的企业。为了提高竞争力，企业必须了解他们的顾客，了解顾客的需求，并且通过专项服务满足顾客的需求。随着技术时代环境的改变，企业已经通过信息系统与客
户建立了关系。随着顾客上网历史的增加，企业可以提供给他们更多的产品信息并且在第一时间获得顾客的回复。通过这种方法，客户服务的成本可以降低；企业与客户的关系可以变得稳定；企业与客户之间可以建立更多的联系；企业与客户之间的沟通可以个性化。 基于格朗鲁斯的研究，他认为关系营销意味着企业通过发展、维护和提高与顾客的关系来达到企业的目的。越来越多的企业发展其吸引力来构建自己的形象以留住和吸引新的顾客。因此，一个企业的专业性和企业形象的构建对企业来说是很重要的。一个公司是否可以提供服务或产品以满足客户的需求影响着客户对企业的信任和忠诚度。 基于Web2.0大流行，大众媒体已经覆盖了许多拥有新颖、有趣故事的网站，吸引了更多的公众关注互联网。这些问题对因特网的常用用户来说都不是问题。因特网发展很迅速。近来微博服务供应商例如Facebook、Twitter和Plurk是新闻的热点话题，已经聚集了大量用户。根据市场研究公司的成员尼尔森最近的一份报告，在2008年二月到2009年二月间，Twitter是用户增长速度最快的一个社交网站（从475000个用户到17600000个用户）。它的绝对访客增长率在美国是1382%。在2009年五月，全国用户数量达到37300000，这是一个令人吃惊的数据。博客用户一直在讨论是否微博可以取代博客。因特网用户最关注的是微博是否可以缩短他们与朋友们之间的距离，是否可以帮助他们交到新朋友。然而，商人们最关注的是微博是否可以替代博客变为一个新的营销武器。 博客营销是指不仅让因特网用户变的亲密，也是指需要“可信的”网络发言人的赞语。博客成为值得信赖的网络发言人是由于他们长时间在某些话题上努力花费时间。通过写文章，他们在互联网用户的心中构建了“大师”的形象。结果，即使他们的一个“好”字也对有科技非常强大的影响力。这就是博客营销的有效性。博客的权利：检查实际操作者在博客上的使用对公共关系产生的影响。 对于微博，我们可以在Twitter上看到谷歌。在谷歌在Twitter上的账户建立后，立马就有16000个追随者。现在谷歌在Twitter上的追随者有1670000人。这意味着谷歌每在Twitter上发表一条新闻，1760000个人在下一秒将在互联网或手机短信上被通知。这种传播新闻的速度和范围是令人吃惊的。 再来说说戴尔，一个主要的国际电脑制造商，例如，通过微博的能力来提供信息，特别提供了可以通过短信迅速传递给所有微博用户信息的功能。因为价钱很合理，许多用户已经立即决定变成戴尔的追随者。并且戴尔继续提供给追随者们更多的第一手优惠券。结果，通过微博达到的总订单金额已经达到了新台币100000000元。通过微博，消息可以更加迅速地传递给互联网用户。然而，这并不意味着任何一种营销信息都可以通过微博随意
毕业设计说明书 英文文献及中文翻译 学院：专 2011年6月 电子与计算机科学技术软件工程
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（ 二 〇 一 二 年 六 月 外文文献及翻译 题 目： About Buiding on the Structure Design 学生姓名： 学 院：土木工程学院 系 别：建筑工程系 专 业：土木工程(建筑工程方向) 班 级：土木08-4班 指导教师：
英文原文： Building construction concrete crack of prevention and processing Abstract The crack problem of concrete is a widespread existence but again difficult in solve of engineering actual problem, this text carried on a study analysis to a little bit familiar crack problem in the concrete engineering, and aim at concrete the circumstance put forward some prevention, processing measure. Keyword:Concrete crack prevention processing Foreword Concrete's ising 1 kind is anticipate by the freestone bone, cement, water and other mixture but formation of the in addition material of quality brittleness not and all material.Because the concrete construction transform with oneself, control etc. a series problem, harden model of in the concrete existence numerous tiny hole, spirit cave and tiny crack, is exactly because these beginning start blemish of existence just make the concrete present one some not and all the characteristic of quality.The tiny crack is a kind of harmless crack and accept concrete heavy, defend Shen and a little bit other use function not a creation to endanger.But after the concrete be subjected to lotus carry, difference in temperature etc. function, tiny crack would continuously of expand with connect, end formation we can see without the