NET-BASED TASK MANAGEMENT SYSTEM
Hector Garcia-Molina, Jeffrey D. Ullman, Jennifer Wisdom
ABSTRACT
In net-based collaborative design environment, design resources become more and more varied and complex. Besides common information management systems, design resources can be organized in connection with design activities.
A set of activities and resources linked by logic relations can form a task. A task has at least one objective and can be broken down into smaller ones. So a design project can be separated into many subtasks forming a hierarchical structure.
Task Management System (TMS) is designed to break down these tasks and assign certain resources to its task nodes．As a result of decomposition.al1 design resources and activities could be managed via this system.
KEY WORDS：Collaborative Design, Task Management System (TMS), Task Decomposition, Information Management System
1 Introduction
Along with the rapid upgrade of request for advanced design methods, more and more design tool appeared to support new design methods and forms. Design in a web environment with multi-partners being involved requires a more powerful and efficient management system .Design partners can be located everywhere over the net with their own organizations. They could be mutually independent experts or teams of tens of employees. This article discusses a task management system (TMS) which manages design activities and resources by breaking down design objectives and re-organizing design resources in connection with the activities. Comparing with common
information management systems (IMS) like product data management system and document management system, TMS can manage the whole design process. It has two tiers which make it much more f1exible in structure.
The 1ower tier consists of traditional common IMSS and the upper one fulfills logic activity management through controlling a tree-like structure, allocating design resources and making decisions about how to carry out a design project. Its functioning paradigm varies in diffe rent projects depending on the project’s scale and purpose. As a result of this structure, TMS can separate its data model from its logic mode1.It could bring about structure optimization and efficiency improvement, especially in a large scale project.
2 Task Management in Net-Based Collaborative Design Environment
2.1 Evolution of the Design Environment
During a net-based collaborative design process, designers transform their working environment from a single PC desktop to LAN, and even extend to WAN. Each design partner can be a single expert or a combination of many teams of several subjects, even if they are far away from each other geographically. In the net-based collaborative design environment, people from every terminal of the net can exchange their information interactively with each other and send data to authorized roles via their design tools. The Co Design Space is such an environment which provides a set of these tools to help design partners communicate and obtain design information. Code sign Space aims at improving the efficiency of collaborative work, making enterprises increase its sensitivity to markets and optimize the configuration of resource.
2.2 Management of Resources and Activities in Net-Based Collaborative Environment
The expansion of design environment also caused a new problem of how to organize the resources and design activities in that environment. As the number of design partners increases, resources also increase in direct proportion. But relations between resources increase in square ratio. To organize these resources and their
relations needs an integrated management system which can recognize them and provide to designers in case of they are needed.
One solution is to use special information management system (IMS).An IMS can provide database, file systems and in/out interfaces to manage a given resource. For example there are several IMS tools in Co Design Space such as Product Data Management System, Document Management System and so on. These systems can provide its special information which design users want.
But the structure of design activities is much more complicated than these IM S could manage, because even a simple design project may involve different design resources such as documents, drafts and equipments. Not only product data or documents, design activities also need the support of organizations in design processes. This article puts forward a new design system which attempts to integrate different resources into the related design activities. That is task management system (TMS).
3 Task Breakdown Model
3.1 Basis of Task Breakdown
When people set out to accomplish a project, they usually separate it into a sequence of tasks and finish them one by one. Each design project can be regarded as an aggregate of activities, roles and data. Here we define a task as a set of activities and resources and also having at least one objective. Because large tasks can be separated into small ones, if we separate a project target into several lower—level objectives, we define that the project is broken down into subtasks and each objective maps to a subtask. Obviously if each subtask is accomplished, the project is surely finished. So TMS integrates design activities and resources through planning these tasks.
Net-based collaborative design mostly aims at products development. Project managers (PM) assign subtasks to designers or design teams who may locate in other cities. The designers and teams execute their own tasks under the constraints which are defined by the PM and negotiated with each other via the collaborative design environment. So the designers and teams are independent collaborative partners and have incompact coupling relationships. They are driven together only by theft design tasks. After the PM have finished decomposing the project, each designer or team leader who has been assigned with a subtask become a 1ow-class PM of his own task.
And he can do the same thing as his PM done to him, re-breaking down and re-assigning tasks.
So we put forward two rules for Task Breakdown in a net-based environment, incompact coupling and object-driven. Incompact coupling means the less relationship between two tasks. When two subtasks were coupled too tightly, the requirement for communication between their designers will increase a lot. Too much communication wil1 not only waste time and reduce efficiency, but also bring errors. It will become much more difficult to manage project process than usually in this situation. On the other hand every task has its own objective. From the view point of PM of a superior task each subtask could be a black box and how to execute these subtasks is unknown. The PM concerns only the results and constraints of these subtasks, and may never concern what will happen inside it.
3.2 Task Breakdown Method
According to the above basis, a project can be separated into several subtasks. And when this separating continues, it will finally be decomposed into a task tree. Except the root of the tree is a project, all eaves and branches are subtasks. Since a design project can be separated into a task tree, all its resources can be added to it depending on their relationship. For example, a Small-Sized-Satellite.
Design (3SD) project can be broken down into two design objectives as Satellite Hardware. Design (SHD) and Satellite-Software-Exploit (SSE). And it also has two teams. Design team A and design team B which we regard as design resources. When A is assigned to SSE and B to SHD. We break down the project as shown in Fig 1.
It is alike to manage other resources in a project in this way. So when we define a collaborative design project’s task model, we should first claim the project’s targets. These targets include functional goals, performance goals, and quality goals and so on. Then we could confirm how to execute this project. Next we can go on to break down it. The project can be separated into two or more subtasks since there are at 1east two partners in a collaborative project. Either we could separate the project into stepwise tasks, which have time sequence relationships in case of some more complex projects and then break down the stepwise tasks according to their phase-to-phase goals.
There is also another trouble in executing a task breakdown. When a task is broken into severa1 subtasks; it is no t merely “a simple sum motion” of other tasks. In
most cases their subtasks could have more complex relations.
To solve this problem we use constraints. There are time sequence constraint (TSC) and logic constraint (LC). The time sequence constraint defines the time relationships among subtasks. The TSC has four different types, FF, FS, SF and SS. F means finish and S presents start. If we say Tabb is FS and lag four days, it means Tb should start no later than four days after Ta is finished.
The logic constraint is much more complicated. It defines logic relationship among multiple tasks.
Here is given an example:
“Task TA is separated into three subtasks, Ta, T b and Tc. But there are two more rules.
Tb and Tc can not be executed until Ta is finished.
Tb and Tc can not be executed both，that means if Tb was executed, Tc should not be executed, and vice versa. This depends on the result of Ta.”
So we say Tb and Tc have a logic constraint. After finishing breaking down the tasks, we can get a task tree as Fig, 2 illustrates.
4 TMS Realization
4.1 TMS Structure
According to our discussion about task tree model and task breakdown basis, we can develop a Task Management System (TMS) based on Co Design Space using Java language, JSP technology and Microsoft SQL 2000. The task management system’s structure is shown in Fig. 3.
TMS has four main modules namely Task Breakdown, Role Management, Statistics and Query and Data Integration. The Task Breakdown module helps users to work out task tree. Role Management module performs authentication and authorization of access control. Statistics and Query module is an extra tool for users to find more information about their task. The last Data Integration Module provides in/out interface for TMS with its peripheral environment.
4.2 Key Points in System Realization
4.2.1 Integration with Co Design Space
Co Design Space is an integrated information management system which stores, shares and processes design data and provides a series of tools to support users. These tools can share all information in the database because they have a universal Data Mode1. Which is defined in an XML (extensible Markup Language) file, and has a hierarchical structure. Based on this XML structure the TMS h data mode1 definition is organized as following.
Notes: Element “Pros” is a task node ob ject, and “Process” is a task set object which contains subtask objects and is belongs to a higher class task object. One task object can have no more than one “Presses” objects. According to this definition, “Prcs” objects are organized in a tree-formation process. The other objects are resources, such as task link object (“Presage”), task notes (“Pros Notes”), and task documents (“Attachments”) .These resources are shared in Co Design database.
文章出处：计算机智能研究[J],47卷，2007：647-703
基于网络的任务管理系统
摘要
在网络与设计协同化的环境下，设计资源变得越来越多样化和复杂化。随着信息管理系统的普及，设计资源在各种设计活动的相互联系过程中被迅速组织起来。
一整套在逻辑关系中联接的活动和资源可以组成一个任务。一个任务至少有一个对象，并且可被拆分为很多小的子任务。所以设计项目可分为许多子任务，并由它们形成一个严谨的层次结构。
任务管理系统（TMS）是被设计来打破这些任务，并指定某些资源去协调其相关工作。这样做的结果就是所有的设计资源和活动都通过这个系统被管理起来。
关键词：协同设计，任务管理系统（TMS），任务分解，信息管理系统
1 简介
随着对先进设计方法的要求的不断提高，支持新的设计方法和形式的设计工具不断涌现。在网络环境下多伙伴参与的设计活动，需要一个更强大和有效率的管理系统。设计伙伴可以在任何地点锁定自己的组织，它们可以让专家或团队数千员工相互独立起来。本文论述了一种通过打破并重组设计资源与活动来管理设计和活动资源的任务管理系统（TMS）。与普通信息管理系统(IMS)比较，例如产品数据管理系统和文件管理系统，任务管理系统能够管理整个设计过程。它的双层结构使之结构更加灵活。
底层由传统的普通信息管理系统结构（IMSS）组成，而高层通过控制树形结构来实现逻辑活动的管理，配置资源以及就如何开展设计项目展开设计和决策。其运作模式也会根据项目的规模和目的产生变化。正是由于这种结构，任务管理系统可以把它的数据模型从其逻辑模型中分离出来，这样将会带来结构优化和效益改善，尤其对一个大型项目来说，作用更加明显。
2 基于网络的任务管理系统开发环境
2.1 设计环境的演进
在网络化协同设计过程中，设计师不断变换着自己的工作环境，从个人电脑到局域网等,甚至延伸至广域网。每个设计伙伴，可以是一个单独专家或结合许多项目的几个科研小组，即使在地理位置上相距遥远。在这样网络化协同设计环境中，来自不同网络终端的人们都可以通过协同的设计空间互动的互相交流信息和发送数据。这种环境提供了一整套工具来帮助设计伙伴沟通和获取设计资料。协同空间旨在提高效率的协同工作，使企业增加敏感的市场,优化配置资源。
2.2 在互动的网络环境下对资源和活动的管理
设计环境的扩展同样造成了一系列新的问题，比如在这种环境下怎么样组织资源和活动。随着设计伙伴数量的不断增加。资源也在成比例的不断增加着。但是不同资源之间的联系也在不断的随着它们的增加而不断提高。如何组织资源间的联系就需要一个综合的管理系统，一个可以组织它们并在各种条件下将其提供给那些需要它的设计师的管理系统。
一个解决方法是使用特殊的信息管理系统（IMS）。这种信息管理系统能够提供数据库,文件系统和输入/输出接口来管理已知的资源。举个例子，在工作空间中有各种不同的ISM工具，如产品数据管理系统文件管理系统等。这些系统可以给他们的用户提供他们需要的各种特殊的信息。
但是结构的设计活动是一项比IMS所能管理的极限还要复杂的多的活动，因为即使一个简单的设计工作可能也需要处理不同的设计资源比如说文件、汇票和各种设备。不仅仅只有产品的数据或者文件，设计活动同样也需要设计过程所提供的各种组织过程。这篇文章提出了一种新的设计系统，它试图把不同的设计资源放进相关的设计活动中，这个就是任务管理系统（TMS）。
3 任务分解模型
3.1 任务分解的依据
当人们去完成一个项目时，他们通常会先把它分解成一个个的小任务，然后再去一个个的完成它。每个设计的项目都可以看作是一个整体的活动，各种对象和数据。我们定义的这个任务同样也需要一系列的活动和资源，并最少拥有一个活动。因为大的任务可以被分解成小的任务，如果我们将一个项目目标分解成几个低级别的目标，我们定义了将这个项目分解成不同的子任务同时每个目标也都映射到一个子任务。显然，如果每个子任务都完成，这个项目肯定已经被完成掉，所以TMS根据这些任务规划了资源和活动的分配。
大多数的网络化协同设计都将他们的目标定在产品的发展上。项目的管理者将这些子任务交给设计师或者设计团队。这些设计师或者团队在项目主管指定的条件下进行他们各自任务的设计。所以这些设计师和设计团队是相互独立的伙伴并且组织松散。当项目主管完成对这些项目的分解时，每个设计师或者设计团队的领队都会被指派一个已经低级别的子任务，并且他们可以做和他们主管同样的事，将这些子任务打破并且重新分配给他的设计师或者团队。
因此，在网络环境下我们为任务分解提出了两项规则，松散的组合和有目的的项目。松散的组合指得是两项任务之间的联系很少，当两个子任务被捆绑的很紧的话，它们的设计者之间的通信量将会增加很多。大量的通信只会浪费时间和降低效率，与此同时也会带来错误。管理项目的过程也会变得比平常更加的困难。另一方面，每个任务都有它自己的工作对象。从项目主管的角度来看，每个子任务都是未知的。他们的注意力只会放在结果和这些子任务的内容上，并且可能永远都不会关心这个小黑匣子里面会发生什么。
3.2 任务分解模式
根据上面的基础,一个项目能被分解为一些子任务，并且当这些分解继续进行时，它最终会组成一个任务树。除非树的结点是一个项目，所有其他的树叶和树枝都是一个个子任务，正是由于一个设计项目可以被分解成一个任务树，所有这些资源都能根据它们之间的关系被添加到适当的位置上，举个例子来说，一个小型的卫星。
设计项目可以像卫星一样被分解成2个设计项目。硬件，设计和软件。并且他也可以有2个团队，设计团队A和设计团队B，这些我们都可以把他们看作设计资源，当A被映射到SSE，B映射到SHD时，我们就像图1一样将这个项目分解掉。
管理一个项目中的其他资源用的也是这种方法，所以当我们确定了一个设计项目的任务模型时，我们应该首先搞清楚这个项目的目的。这些目标包括系统的目的，业绩的目标，质量的目标等等。然后我们应该确定如何执行这个项目，紧接着我们可以开始将它细化。因为有最少2个的设计伙伴，这些项目可以被分解成一个或者更多的子任务。或者当我们遇到一些更复杂的项目时，可以将这项项目分解成有层次感的任务，并按它们相互间的目标来逐步的实现这些任务。
当我们对一个任务进行细化时还将遇到一个难题。当我们将一个任务分解为几个子任务时，我们所要做的并不仅仅是“一个简单运算”，在大多数情况下，这项被细化的子任务具有更加复杂的关联。
为了解决这一难题，我们使用了一些约束条件。这项约束条件可分为时分约束（TSC）和逻辑约束（LC）。时分约束定义了子任务间的时间关系。时分约束有四种类型，FF，FS，SF和SS。F的意思是完成，S的意思是开始。当我们说TaTb并且延时四天，它的意思就是Tb应该在Ta结束后四天之内开始。
逻辑约束就比较复杂了，它规定了这些多任务之间的逻辑关系。
这里举一个例子：
“任务TA被分解成3个子任务，Ta，Tb和Tc。但是这里有2个规则需要遵守。
Ta结束前，Tb和Tc不能被执行。
Tb和Tc不可以同时被执行，这就表示Tb被执行的时候Tc不应该被执行，反之亦然，并且这些都建立在Ta运行结果的基础上。”
所以我们说Tb和Tc有逻辑的约束，在完成对这些任务的约束后，我们得到了如图2所示的一个任务树。
4 TMS简介
4.1 TMS结构
通过对任务树模型和任务分解基础的讨论，我们可以想象出一个基于用JA V A 语言表达的工作空间的任务管理系统，JSP技术和Microsoft SQL 2000。这些任务系统的结构我们在图3中有表达。
TMS有4种主要功能模块，即任务分解，角色管理，统计查询和数据整合。任务分解模块可以帮助用户设计出任务树。角色管理模块进行人证并授权管理权限。统计查询模块提供给用户一个额外的寻找信息的工具，最后的数据整合模块用它的集成环境提供给TMS一个输入/输出接口。
4.2 系统要点简介
4.2.1 工作空间的整合
工作空间是对被存储的信息管理系统的整合、共享，并提供给用户的一系列工具。因为有一个通用的数据模型，所以这些工具可以共享定义在XML中的所有信息。基于这些XML结构，TMS的数据模型就被下面所组织的信息所定义。（下方英文为程序代码）
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外文文献： Knowledge of the stepper motor What is a stepper motor： Stepper motor is a kind of electrical pulses into angular displacement of the implementing agency. Popular little lesson: When the driver receives a step pulse signal, it will drive a stepper motor to set the direction of rotation at a fixed angle (and the step angle). You can control the number of pulses to control the angular displacement, so as to achieve accurate positioning purposes; the same time you can control the pulse frequency to control the motor rotation speed and acceleration, to achieve speed control purposes. What kinds of stepper motor sub-： In three stepper motors: permanent magnet (PM), reactive (VR) and hybrid (HB) permanent magnet stepper usually two-phase, torque, and smaller, step angle of 7.5 degrees or the general 15 degrees; reaction step is generally three-phase, can achieve high torque output, step angle of 1.5 degrees is generally, but the noise and vibration are large. 80 countries in Europe and America have been eliminated; hybrid stepper is a mix of permanent magnet and reactive advantages. It consists of two phases and the five-phase: two-phase step angle of 1.8 degrees while the general five-phase step angle of 0.72 degrees generally. The most widely used Stepper Motor. What is to keep the torque (HOLDING TORQUE) How much precision stepper motor? Whether the cumulative： The general accuracy of the stepper motor step angle of 3-5%, and not cumulative.
附录A Lathe fixture design and analysis Ma Feiyue (School of Mechanical Engineering, Hefei, Anhui Hefei 230022, China) Abstract: From the start the main types of lathe fixture, fixture on the flower disc and angle iron clamp lathe was introduced, and on the basis of analysis of a lathe fixture design points. Keywords: lathe fixture; design; points Lathe for machining parts on the rotating surface, such as the outer cylinder, inner cylinder and so on. Parts in the processing, the fixture can be installed in the lathe with rotary machine with main primary uranium movement. However, in order to expand the use of lathe, the work piece can also be installed in the lathe of the pallet, tool mounted on the spindle. THE MAIN TYPES OF LATHE FIXTURE Installed on the lathe spindle on the lathe fixture
广东工业大学华立学院 本科毕业设计（论文） 外文参考文献译文及原文 系部经济学部 专业经济学 年级 2007级 班级名称 07经济学6班 学号 16020706001 学生姓名张瑜琴 指导教师陈锶 2011 年05月
目录 1挑战：小额贷款中的进入和商业银行的长期承诺 (1) 2什么商业银行带给小额贷款和什么把他们留在外 (2) 3 商业银行的四个模型进入小额贷款之内 (4) 3.1内在的单位 (4) 3.2财务子公司 (5) 3.3策略的同盟 (5) 3.4服务公司模型 (6) 4 合法的形式和操作的结构比较 (8) 5 服务的个案研究公司模型：厄瓜多尔和Haiti5 (9)
1 挑战：小额贷款中的进入和商业银行的长期承诺 商业银行已经是逐渐重要的运动员在拉丁美洲中的小额贷款服务的发展2到小额贷款市场是小额贷款的好消息客户因为银行能提供他们一完整类型的财务的服务，包括信用，储蓄和以费用为基础的服务。整体而言，它也对小额贷款重要，因为与他们广泛的身体、财务的和人类。如果商业银行变成重的运动员在小额贷款，他们能提供非常强烈的竞争到传统的小额贷款机构。资源，银行能廉宜地发射而且扩张小额贷款服务rela tively。如果商业广告银行在小额贷款中成为严重的运动员，他们能提出非常强烈的竞争给传统的小额贷款机构。然而，小额贷款社区里面有知觉哪一商业银行进入进入小额贷款将会是短命或浅的。举例来说，有知觉哪一商业银行首先可能不搬进小额贷款因为时候建立小额贷款操作到一个有利润的水平超过银行的标准投资时间地平线。或，在进入小额贷款，银行之后可能移动在－上面藉由增加贷款数量销售取利润最大值－或者更坏的事，退出如果他们是不满意与小额贷款的收益性的水平。这些知觉已经被特性加燃料商业银行的情形进入小额贷款和后来的出口之内。在最极端的，一些开业者已经甚至宣布，”降低尺度死！”而且抛弃了与主意合作的商业银行。 在最 signific 看得到的地方，蚂蚁利益商业银行可能带给小额贷款，国际的ACCION 发展发射而且扩张的和一些商业银行的关系小额贷款操作。在这些情形的大部分方面， ACCION 和它的合伙人正在使用方法，已知的当做服务公司模型，表演早答应当做一个能工作的方法克服真正的。 商业银行的障碍进入和穿越建立长命的小额贷款操作一个商业银行 这论文描述如何服务公司模型、住址商业银行中的主要议题进入进小额贷款，监定成功建立的因素动作井小额贷款服务公司，和礼物结果和小额贷款的课servic e 公司用最长的经验，在海地和审判官席 del 的 SOGEBANK│ SOGESOL 初期结果指出那这服务公司模型表现一重要的突破在促成商业银行进入和留在小额贷款。在厄瓜多尔的 Pichincha│ CREDIFE。初期结果指出服务公司模型在促成商业广告中表现一次重要的突破银行进入而且留在小额贷款。
at89c52单片机简介 中英文资料对照外文翻译文献综述 A T89C52 Single-chip microprocessor introduction Selection of Single-chip microprocessor 1. Development of Single-chip microprocessor The main component part of Single-chip microprocessor as a result of by such centralize to be living to obtain on the chip，In immediate future middle processor CPU。Storage RAM immediately﹑memoy read ROM﹑Interrupt system、Timer /'s counter along with I/O's rim electric circuit awaits the main microcomputer section，The lumping is living on the chip。Although the Single-chip microprocessor r is only a chip，Yet through makes up and the meritorous service be able to on sees，It had haveed the calculating machine system property，calling it for this reason act as Single-chip microprocessor r minisize calculating machine SCMS and abbreviate the Single-chip microprocessor。 1976Year the Inter corporation put out 8 MCS－48Set Single-chip microprocessor computer，After being living more than 20 years time in development that obtain continuously and wide-ranging application。1980Year that corporation put out high performance MCS －51Set Single-chip microprocessor。This type of Single-chip microprocessor meritorous service capacity、The addressing range wholly than early phase lift somewhat，Use also comparatively far more at the moment。1982Year that corporation put out the taller 16 Single-chip microprocessor MCS of performance once
1. Introduction America is one of the countries that speak English. Because of the special North American culture, developing history and the social environment, American English has formed its certain unique forms and the meaning. Then it turned into American English that has the special features of the United States. American English which sometimes also called United English or U.S English is the form of the English language that used widely in the United States .As the rapid development of American economy, and its steady position and strong power in the world, American English has become more and more widely used. As in 2005, more than two-thirds of English native speakers use various forms of American English. The philologists of the United States had divided the English of the United States into four major types: “America n creating”; “Old words given the new meaning”; “Words that eliminated by English”;“The phonetic foreign phrases and the languages that are not from the English immigrates”[1]. Compared to the other languages, American English is much simple on word spelling, usage and grammar, and it is one of the reasons that American English is so popular in the world. The thesis analyzes the differences between American English and British English. With the main part, it deals with the development of American English, its peculiarities compared to that of British English, its causes and tendency. 2. Analyses the Differences As we English learners, when we learning English in our junior or senior school, we already came across some words that have different spellings, different pronunciations or different expressions, which can be represented by following contrasted words: spellings in "color" vs. "colour"; pronunciations in "sec-re-ta-ry" vs. "sec-re-try";
关于毕业设计说明书（论文）英文文献及中文翻译撰写格式 为提高我校毕业生毕业设计说明书（毕业论文）的撰写质量，做到毕业设计说明书（毕业论文）在内容和格式上的统一和规范，特规定如下: 一、装订顺序 论文（设计说明书）英文文献及中文翻译内容一般应由3个部分组成，严格按以下顺序装订。 1、封面 2、中文翻译 3、英文文献（原文） 二、书写格式要求 1、毕业设计（论文）英文文献及中文翻译分毕业设计说明书英文文献及中文翻译和毕业论文英文文献及中文翻译两种，所有出现相关字样之处请根据具体情况选择“毕业设计说明书” 或“毕业论文”字样。 2、毕业设计说明书（毕业论文）英文文献及中文翻译中的中文翻译用Word 软件编辑，英文文献用原文，一律打印在A4幅面白纸上，单面打印。 3、毕业设计说明书（毕业论文）英文文献及中文翻译的上边距:30mm；下边距:25mm；左边距:3Omm；右边距:2Omm；行间距1.5倍行距。 4、中文翻译页眉的文字为“中北大学2019届毕业设计说明书” 或“中北大学××××届毕业论文”，用小四号黑体字，页眉线的上边距为25mm；页脚的下边距为18mm。 5、中文翻译正文用小四号宋体，每章的大标题用小三号黑体，加粗，留出上下间距为：段前0.5行，段后0.5行；二级标题用小四号黑体，加粗；其余小标题用小四号黑体，不加粗。 6、文中的图、表、附注、公式一律采用阿拉伯数字分章编号。如图1.2，表2.3，附注3.2或式4.3。 7、图表应认真设计和绘制,不得徒手勾画。表格与插图中的文字一律用5号宋体。
每一插图和表格应有明确简短的图表名，图名置于图之下，表名置于表之上，图表号与图表名之间空一格。插图和表格应安排在正文中第一次提及该图表的文字的下方。当插图或表格不能安排在该页时，应安排在该页的下一页。 图表居中放置，表尽量采用三线表。每个表应尽量放在一页内，如有困难，要加“续表X.X”字样，并有标题栏。 图、表中若有附注时，附注各项的序号一律用阿拉伯数字加圆括号顺序排，如:注①。附注写在图、表的下方。 文中公式的编号用圆括号括起写在右边行末顶格，其间不加虚线。 8、文中所用的物理量和单位及符号一律采用国家标准，可参见国家标准《量和单位》(GB3100~3102-93)。 9、文中章节编号可参照《中华人民共和国国家标准文献著录总则》。
MCS-51系列单片机 中英文资料对照外文翻译文献综述 Structure and function of the MCS-51 series Structure and function of the MCS-51 series one-chip computer MCS-51 is a name of a piece of one-chip computer series which Intel Company produces. This company introduced 8 top-grade one-chip computers of MCS-51 series in 1980 after introducing 8 one-chip computers of MCS-48 series in 1976. It belong to a lot of kinds this line of one-chip computer the chips have, such as 8051, 8031, 8751, 80C51BH, 80C31BH,etc., their basic composition, basic performance and instruction system are all the same.8051 daily representatives-51 serial one-chip computers. A one-chip computer system is made up of several following parts: (1) One microprocessor of 8 (CPU). ( 2) At slice data memory RAM (128B/256B),it use not depositing not can reading /data that write, such as result not middle of operation, final result and data wanted to show, etc. (3) Procedure memory ROM/EPROM (4KB/8K B ), is used to preserve the
2604130359 CNC Cutting Technology Review Numerical control high speed cutting technology (High Speed Machining, HSM, or High Speed Cutting, HSC), is one of the advanced manufacturing technology to improve the machining efficiency and quality, the study of related technology has become an important research direction of advanced manufacturing technology at home and abroad. China is a big manufacturing country, in the world of industry transfer to accept the front instead of back-end of the transfer, to master the core technology of advanced manufacturing, or in a new round of international industrial structure adjustment, our country manufacturing industry will further behind. Imminent research on the theory and application of advanced technology. 1, high-speed CNC machining meaning High speed cutting theory put forward by the German physicist Carl.J.Salomon in the last century and early thirty's. He concluded by a lot of experiments: in the normal range of cutting speed, cutting speed if the increase, will cause the cutting temperature rise, exacerbating the wear of cutting tool; however, when the cutting speed is increased to a certain value, as long as more than the inflection point, with the increase of the cutting speed, cutting temperature can not rise, but will decline, so as long as the cutting speed is high enough, it can be solved very well in high cutting temperature caused by tool wear is not conducive to the cutting problem, obtained good processing efficiency. With the development of manufacturing industry, this theory is gradually paid more attention to, and attracted a lot of attention, on the basis of this theory has gradually formed the field of high-speed cutting technology of NC, relatively early research on NC High-speed Machining Technology in developed countries, through the theoretical basis of the research, basic research and applied research and development application, at present applications have entered the substantive stage in some areas. The high-speed cutting processing category, generally have the following several kinds of classification methods, one is to see that cutting speed, cutting speed over conventional cutting speed is 5-10 times of high speed cutting. Also has the scholar to spindle speed as the definition of high-speed processing standards, that the spindle speed is higher than that of 8000r\/min for high speed machining. And from the machine tool spindle design point of view, with the product of DN diameter of spindle and spindle speed, if the value of DN to (5~2000) * 105mm.r\/min, is considered to be of high speed machining. In practice, different processing methods, different materials, high speed cutting speed corresponding to different. Is generally believed that the turning speed of (700~7000) m\/min, milling speed reaches m\/min (300~6000), that is in the high-speed cutting. In addition, from the practical considerations, high-speed machining concept not only contains the high speed cutting process, integration and optimization also contains the process of cutting, is a
英语专业文献翻译 题目: 基于交通服务感知质量的效用评价方法姓名: 丁贞钰 学院: 工学院 专业: 交通运输 班级: 101班 学号: 30210101 指导教师: 陈青春职称: 副教授 2013年11月25日 南京农业大学教务处制
基于交通服务感知质量的效用评价方法 Hideyuki Kita a Akira Kouchi b a Department of Civil Engineering, Graduate School of Engineering, University of Kobe, 1-1, Rokkodai-cho, Nada-ku, Kobe, 658-8501, Japan b Infrastructural Planning Department, Chodai Co. Ltd., 2-20-6, Shin-machi, Nishi-ku, Osaka, 550-0013, Japan 摘要：本研究旨在开发一个通过宏观交通状态数据评价微观驾驶环境的模型，并且展示一系列基于驾驶员视觉的交通服务质量估算方法的模型。该方法由三部分组成，第一部分通过宏观数据评价行驶速度和时间间隔分配，第二部分评价作为行驶速度和时间间隔联合概率的基点效用。第三部分通过利用经验公式的基点概率分布估计基段效用。通过一个研究案列论证所提出的方法。 关键词：驾驶员感知；交通服务质量；基础效用评价；估计方法；交通调查数据；相关函数 1 引言 交通服务质量直接关系到驾驶员的利益。为了提高交通服务质量，应采取必要措施提高驾驶员对道路规划和交通管理的满意度。采取适当的基于驾驶员感知的方法来评价路用性能是必要的。弄清驾驶员服务质量感知结构对区分驾驶员感知服务质量也是必要的。 从驾驶员感知的角度对服务质量的评价已经有了很大成就,研究人员对评价驾驶员感知结构的感知服务质量做了比以前更多的尝试，但是感知服务质量的层次结构依旧很少被人认识。基于驾驶员的感知结构的层次结构，包括基点服务质量、基段服务质量和基面服务质量。通过参考感知结构的服务质量，Kita(2000)提出了测量服务质量的方法的基本框架。这个框架的基本思想是服务质量的最小单位是微观驾驶环境，比如在每个路段驾驶员的视野范围内相对速度和空间时间间隔。驾驶员对于特定路段的服务质量感知是这些基点服务质量的集合。然而关于感知服务质量的重要因素—微观驾驶环境的数据却很难获得。另一方面，宏观交通状态变量，比如由微观交通状况变量集合的数据—速率，可以很容易的通过车辆检测器。在给定宏观交通状况下，捕捉发生在什么样的微观环境和到什么程度是必要的。但是，没有研究与以上观点相关，直到本文作者对他的认识。 本研究的目的是开发一个通过宏观交通状况变量评价微观驾驶环境的方法，并提出一系列对宏观交通状态变量的基点服务质量的测量和对根据驾驶感知结构和服务质量层次结构基点服务质量的基段服务质量的测量方法。通过使用上面的方法，获得有关驾驶员感知结构的宏观交通状况数据，评价基于驾驶员感知的基段服务质量。 本文组织如下。第2部分，概括评价服务质量领域的相关文献。第3部分，表述包括提出的方法论的一系列方法的概要和基本思想。第4部分，概述运用宏观交通状态变量估计微观驾驶环境的方法。第5部分，开发了一种联系基点感知服务质量和考虑认知倾向的基段感知服务质量的模型，并对概率分布之间的关系效用进行微观分析。第6部分，通过运用从车辆检测器上获得的实际交通状况数据检测本文所表述的理论模型的有效性。第7部分，结论。 2 文献综述 已经做过很多关于驾驶员感知的服务质量评价工作。但由于篇幅有限，只把文献大纲列出如下。更多信息可以从Kita and Kouchi(2010)中获得。有一些研究阐述了交通服务质量应该基于驾驶员的微观驾驶环境的感知评价交通服务质量(Morrall and Werner (1990), Ishibashi et al. (2006))。有一些研究试图找到一个可以展现与感知交通服务质
Advantages of Managed Code Microsoft intermediate language shares with Java byte code the idea that it is a low-level language witha simple syntax , which can be very quickly translated intonative machine code. Having this well-defined universal syntax for code has significant advantages. Platform independence First, it means that the same file containing byte code instructions can be placed on any platform; atruntime the final stage of compilation can then be easily accomplished so that the code will run on thatparticular platform. In other words, by compiling to IL we obtain platform independence for .NET, inmuch the same way as compiling to Java byte code gives Java platform independence. Performance improvement IL is actually a bit more ambitious than Java bytecode. IL is always Just-In-Time compiled (known as JIT), whereas Java byte code was ofteninterpreted. One of the disadvantages of Java was that, on execution, the process of translating from Javabyte code to native executable resulted in a loss of performance. Instead of compiling the entire application in one go (which could lead to a slow start-up time), the JITcompiler simply compiles each portion of code as it is called (just-in-time). When code has been compiled.once, the resultant native executable is stored until the application exits, so that it does not need to berecompiled the next time that portion of code is run. Microsoft argues that this process is more efficientthan compiling the entire application code at the start, because of the likelihood that large portions of anyapplication code will not actually be executed in any given run. Using the JIT compiler, such code willnever be compiled.
中文资料原文 单片机 单片机也被称为微控制器（Microcontroller Unit），常用英文字母的缩写MCU表示单片机，它最早是被用在工业控制领域。单片机由芯片内仅有CPU的专用处理器发展而来。最早的设计理念是通过将大量外围设备和CPU集成在一个芯片中，使计算机系统更小，更容易集成进复杂的而对体积要求严格的控制设备当中。INTEL的Z80是最早按照这种思想设计出的处理器，从此以后，单片机和专用处理器的发展便分道扬镳。 早期的单片机都是8位或4位的。其中最成功的是INTEL的8031，因为简单可靠而性能不错获得了很大的好评。此后在8031上发展出了MCS51系列单片机系统。基于这一系统的单片机系统直到现在还在广泛使用。随着工业控制领域要求的提高，开始出现了16位单片机，但因为性价比不理想并未得到很广泛的应用。90年代后随着消费电子产品大发展，单片机技术得到了巨大提高。随着INTEL i960系列特别是后来的ARM系列的广泛应用，32位单片机迅速取代16位单片机的高端地位，并且进入主流市场。而传统的8位单片机的性能也得到了飞速提高，处理能力比起80年代提高了数百倍。目前，高端的32位单片机主频已经超过300MHz，性能直追90年代中期的专用处理器，而普通的型号出厂价格跌落至1美元，最高端[1]的型号也只有10美元。当代单片机系统已经不再只在裸机环境下开发和使用，大量专用的嵌入式操作系统被广泛应用在全系列的单片机上。而在作为掌上电脑和手机核心处理的高端单片机甚至可以直接使用专用的Windows和Linux操作系统。 单片机比专用处理器更适合应用于嵌入式系统，因此它得到了最多的应用。事实上单片机是世界上数量最多的计算机。现代人类生活中所用的几乎每件电子和机械产品中都会集成有单片机。手机、电话、计算器、家用电器、电子玩具、掌上电脑以及鼠标等电脑配件中都配有1-2部单片机。而个人电脑中也会有为数不少的单片机在工作。汽车上一般配备40多部单片机，复杂的工业控制系统上甚至可能有数百台单片机在同时工作！单片机的数量不仅远超过PC机和其他计算的总和，甚至比人类的数量还要多。 单片机又称单片微控制器,它不是完成某一个逻辑功能的芯片,而是把一个计算机系统集成到一个芯片上。相当于一个微型的计算机，和计算机相比，单片机只缺少了I/O设备。概括的讲：一块芯片就成了一台计算机。它的体积小、质量轻、价格便宜、为学习、应用和开发提供了便利条件。同时，学习使用单片机是了解计算机原理与结构的最佳选择。
A review and analysis of current computer-aided fixture design approaches Iain Boyle, Yiming Rong, David C. Brown Keywords: Computer-aided fixture design Fixture design Fixture planning Fixture verification Setup planning Unit design ABSTRACT A key characteristic of the modern market place is the consumer demand for variety. To respond effectively to this demand, manufacturers need to ensure that their manufacturing practices are sufficiently flexible to allow them to achieve rapid product development. Fixturing, which involves using fixtures to secure work pieces during machining so that they can be transformed into parts that meet required design specifications, is a significant contributing factor towards achieving manufacturing flexibility. To enable flexible fixturing, considerable levels of research effort have been devoted to supporting the process of fixture design through the development of computer-aided fixture design (CAFD) tools and approaches. This paper contains a review of these research efforts. Over seventy-five CAFD tools and approaches are reviewed in terms of the fixture design phases they support and the underlying technology upon which they are based. The primary conclusion of the review is that while significant advances have been made in supporting fixture design, there are primarily two research issues that require further effort. The first of these is that current CAFD research is segmented in nature and there remains a need to provide more cohesive fixture design support. Secondly, a greater focus is required on supporting the detailed design of a fixture’s physical structure. 2010 Elsevier Ltd. All rights reserved. Contents 1. Introduction (2) 2. Fixture design (2) 3. Current CAFD approaches (4) 3.1 Setup planning (4) 3.1.1 Approaches to setup planning (4) 3.2 Fixture planning (4) 3.2.1 Approaches to defining the fixturing requirement (6) 3.2.2 Approaches to non-optimized layout planning (6) 3.2.3 Approaches to layout planning optimization (6) 3.3 Unit design (7) 3.3.1 Approaches to conceptual unit design (7)