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The main content of this thesis is as follows: 1The structures of EPS are analyzed. The main components of EPS are introduced in detail. Then the distributed torque in EPS is analyzed and the control system model is set up. 2Three control modes are discussed and the control strategy of EPS is studied in detail. Three principal modules in the control strategy are discussed—the predicted module which predicts motor rotational speed and steering rotational speed, the power-assistant module and the return control module. 3The assistant torque curves of the motor are designed by using the B-spline, so that any kind of custom-built assistant torque curves can be designed according to different kinds of automobiles. 4The hardware frame of EPS is studied. The developed controller based on 8-bit MCU MC68HC908MR8 is introduced and many related circuit units are designed, including the control circuit, the driver control circuit and so on. The software structure is discussed, then the steering control program flowchart is given.

本文的主要工作有: 1分析了EPS 的总体构成,对EPS 的各个部件作了详细的介绍,并在此基础上分析了EPS 的受力情况,建立了控制系统模型,并研究了EPS 的安全性能; 2讨论了EPS 的三种控制方式,提出了控制策略,并讨论了其中三个关键模块的作用:预估模块包括对电机转速和方向盘角速度的预估,助力控制模块以及回正模块; 3用B 样条插值方法进行EPS 助力曲线的设计,可按照用户的要求设计任意形状的助力曲线,以满足不同车型和不同用户的要求; 4研究了控制系统的硬件结构,以MC68HC908MR8 为核心设计了控制器,详细讨论了控制器的控制电路、驱动电路等;设计了控制系统的软件,给出了控制程序流程图,并对要点进行了详细的说明。

In this thesis, how to study and apply of system of CRM based on Web are discussed. Firstly, we summarize the principle of CRM, beginning with the current research condition, and introduce the concept, features and management principle of CRM. Secondly, we illustrate the basic architecture of web-based CRM system to form the basis of the further research and propose the integration of CRM system to the front end of enterprise, namely, the study on the business process re-engineering of CRM system. Then we discuss the key technique knowledge on CRM system based on Web, which included the technology of system interface, system safety and the design of net framework. And explain the technology of web service is a good solution to the problem of system interface in the Internet and the advantage of the develop way based on the B/S pattern. According to an application of CRM system based on Web, this thesis explains how to set up a CRM system based on Web, which include the customer requirement, analyzing the business process, system framework and system safety. At last, this thesis puts forward the extensive foreground of the system of web-based CRM with the expanding of the web technology and explains that there are some questions are to be resolve stilly in this thesis.

本文的研究内容首先从客户关系管理的研究现状出发,对客户关系管理加以概述,阐述CRM系统概念、系统特点和核心管理思想;并阐明了基于Web的CRM系统的基本架构为进一步的研究作铺垫,提出CRM系统对企业前端的整合,即对CRM系统的业务流程重构的研究;接下来说明基于Web的CRM系统开发的关键技术,包括系统体系结构的选择,系统接口以及系统安全三方面的技术要求,具体说明了B/S模式的原理及优点,Web Service是解决基于B/S模式系统的接口问题的最好方案;然后以一个销售管理CRM系统为例,说明如何构建一个基于Web的CRM系统,包括了系统设计要求、系统实现、系统功能框架和系统安全机制;最后根据当前通信和网络技术的发展,展望基于Web的CRM系统应用的广泛前景,并对在本文研究中还存在需要改进的地方进行了探讨。

Luckily, all the designs were rejected and the judges asked for fresh ideas, including some from Telford himself.

不过,幸运的是,所有的设计方案都遭到否决,评判们要求有新意(包括要求泰尔福特本人提出一些新意)。

It will expose the design problem of maintainability of civil airplane to the early stage of design. This paper discusses the composing of the virtual maintenance environment, builds non-immersion virtual maintenance environment of undercarriage, and establishes a part library management system. The characteristic of maintainability models and maintainability analysis based on virtual technique is researched to give the maintainability frame model of civil airplane virtual maintainability analysis. All levels of maintenance time model and maintenance man-hour model are established. Analog-Huffman code is proposed to optimize space partition method in traditional collision detection arithmetic."Maintenance therblig"is brought into the broken down of maintenance tasks, and the new maintenance tasks broken down method is proposed. The demands of human measure, position, and equipment layout in human engineering are discussed, and the verification methods of human measure, position and equipment layout in virtual maintenance are given. Basic principle and verification procedure of maintainability virtual verification is developed primarily, and the reachablity, the visibility, and posture-comfortability are verified.

本文论述了虚拟维修环境的组成,构建了某型飞机主起落架非沉浸式虚拟维修环境,建立了维修对象的零件库管理系统;研究了基于虚拟技术的维修性模型特点及维修性分析流程,给出了基于虚拟技术的民机维修性分析框架模型,并结合传统维修性模型,建立了各级维修时间模型和维修工时模型;提出类HUFFMAN编码,结合人因工程的要求,优化了传统碰撞检测算法中的空间分割法,使之适用于柔体;在维修性分解中引入"维修动素",给出了与CATIA、DELMIA等应用软件结合紧密的维修任务分解方法;论述了人因工程中对人体尺寸、姿势、设备布局的要求,给出了虚拟维修中人体尺寸、姿势分析、民机内设备布局的验证方法;初步制订了维修性虚拟验证的基本原则和验证程序,并结合具体实例对可达性、可视性、干涉性以及人体姿态舒适性进行了验证,较清晰、真实地反映了维修人员的维修状态。

Large high-power solid-state laser facilities have a very high requirement for the total positioning error budget (0μm in general), so it is a very important to improve the stability of structure design.

大型高功率固体激光装置通常要求总的打靶精度为几十微米,这对结构的稳定性设计提出了很高的要求。

In this paper,the optimitun process of design and construction of a super-shallow overburden multi- arch underpass is introduced.

介绍了一座超浅埋双联拱过街地道的设计和施工方案优化过程;针对该地道的使用要求、地质条件及地表环境要求,分析了原设计在结构形式、支护措施及施工方法等方面存在的缺陷;并提出了相应的改进措施。

After giving a brief analysis of pressure hazards and accident simulation methods, the authors introduce the system of European PED - EN system for pressure equipment in order to eliminate or reduce pressure hazards by studying 97/23/EC Pressure Equipment Directive and EN13445 Unfired Pressure Vessels and describe the impacts of PED - EN system on the ASME pressure vessel codes and the...

本文在简要分析压力危险以及事故后果模拟方法的基础上,先结合97/23/EC《承压设备指令》、EN13445《非火焰接触压力容器》等规范标准,介绍以消除或降低压力危险为出发点的欧盟承压设备规范标准体系,再介绍美国应对欧盟97/23/EC《承压设备指令》的对策措施,最后提出按压力危险程度确定承压设备的范畴、以标准应满足法规要求的理念建立承压设备法规标准体系、开展承压设备基本安全要求研究、研究承压设备最新规范标准和我国应对策略、成立中国承压设备研究委员会等建议。

And through analyzing the problemsexisting in China at present, it indicates that there is a far-reaching strategic meaning of city ecology environmentalimpact assessment for the realization of the sustainable development of city ecology environment, and points out apivotal and effective way of the realization of the sustainable development of city ecology environment, that isdeveloping green economy unshakably.

随着城市化进程的加快和人们物质生活水平的不断提高,城市人对生活环境品质的要求越来越高,这就给城市生态环境影响评价提出了更高的要求,即如何形成一个可持续发展的良好生态环境。

For technology projects, it's a good idea to specify a warranty or support clause so that you are assured of some amount of continuing support from the vendor after the project is complete.

对于技术含量高的工程,你应该要求承包商在工程完成后,提供正当的后续服务,所以在工程完成之前需要提出这个要求,避免拖到工程完工后。

The others are Mucuna sempervirens,Parthenocissus trcuspidata,Wistaria sinensis Sweet in turn.According to the distinction of ecological functional of these four plants,the kind of plants which should be chosen under various ecological environment conditions or for different demands of ecological function of the plants were given.1. The most suitable plants for the area which get serious pollution such as factory,roadway and so on is Mucuna sempervirens.the other plant which more suitable is Rosa banksiae Ait.2. The most suitable plants for the hospital and the area for the children and the old is Mucuna sempervirens. And we can also select Parthenocissus trcuspidata.3. In the green area of modern enterprise that produce precision instrument,Rosa banksiae Ait is the best selection.4. Rosa banksiae Ait is the most suitable plants in resident green area. Planting Mixed with Mucuna sempervirens has better effectiveness.

以四种植物的生态功能性差异评价为依据,提出不同生态环境条件下和对植物不同的生态功能性要求的垂直绿化应选择的植物: 1 在道路、工厂等污染较严重的地区搞垂直绿化,最合适的植物是油麻藤,其次可选择木香; 2 医院及儿童、老人活动区的垂直绿化首选是油麻藤,其次是爬山虎; 3 生产精密仪器的现代企业绿地,垂直绿化植物选择以木香为首选,可结合大面积的爬山虎墙面绿化; 4 居住区绿地的垂直绿化植物选择以木香最符合要求,再以油麻藤进行混植,效果较好。

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推荐网络例句

They go to town. Would you just ask them?

他们在城里你能问他们吗?

Ossein pretreated for a2 weeks period exhibited the maximum% yield incase of bone gelatin, while the yield from intact skin was higher than that realized incase of de-scaled skin.

预处理时间达2星期的骨胶原表现出最高的骨明胶百分产量,然而从未处理鱼皮中得到的产率比去鳞的鱼皮得到的要高。

Add in realistic voice acting, and you're about to get emotionally attached toa whole platoon of charactersEvery object on the battlefield is destructible - and once it's destroyed, it stays destroyedIn addition to the rich 1-player storyline, Pathway to Glory features the kind of multiplayer options that N-Gage was made for: go against another player using the same game deck with the Hot Seat option, or connect via Bluetooth technology and go head-to-head.

在现实的声音演戏方面增加,而且你正要拿个性的整个排给在情绪上附上的 toa在战场上的每个物体是可破坏的-而且一经资讯科技被破坏,它停留破坏发现你站着哪里:钮扣的推给你一个概览,如此你能很快地恢复一种不稳定的情形控制除了富有的 1个运动员的剧情之外,通往光荣的道路以可多人玩的选项类型为特色 N-规格被有益:去对抗和困境选项一起使用相同的游戏甲板的另外一个运动员,否则经由 Bluetooth 技术连接而且去头-到-头。