课题

Secondly, regarding the diffusion rate as a bifurcation parameter, we show that the one-dimensional competition diffusion system with infinite delay and Dirichlet boundary condition exhibits the spatiotemporal structure near the steady state of the system.

介绍问题的生物学背景，概述Logistic模型和Volterra模型的研究历程并提出我们所研究的课题，另外还给出了所需的基础理论。

Swithced reluctance machine is a new structure of electromotor. Combining this new structure with the modem power electronics technique and modem control technique, swithced reluctance drive has been one of the pop issues of the development of modem electric dirve.

开关型磁阻电动机调速系统融开关型磁阻电动机与现代电力电子技术、控制技术为一体，兼有异步电动机变频调速系统和直流电动机调速系统的优点，已经成为当代电气传动发展的热门课题之一。

With promotion of quality education, the study on the disadvantaged student group is very important.

随着素质教育的推进，学生弱势群体现象是一个非常紧迫的研究课题。

Hepatic diseases are common, about 10% of them die of acute liver failure , ALF is a sever clinical pathophysiological syndrome of metabolic, secretic and immune disarrangement caused by severe hepatocyte dysfunction and decompensation, caused by drug, toxin, severe hepatitis and cirrhosis, liver injury or/and hepatectomy.

本课题为国家"863"计划生物项目的系列研究之一肝病是多发病，其中大约10％患者死于急性肝功能衰竭（acuteliver failure，ALF），是由药物、毒物、重症肝炎或肝硬变、肝外伤或／和肝切除术后致肝细胞功能严重受损、失代偿，引起机体代谢、内分泌、免疫等功能紊乱的一种严重临床病理生理综合症。

So, the research on assembly and disassembly of furniture design is a very valuable problem.

为此，面向装配和拆卸的家具设计研究是一个十分有价值的课题。

Product return and product disassembly play an important role in the remanufacturing system, so they are the main issues to be discussed in this thesis.

产品的回收和拆卸是再制造系统的重要环节，也是传统制造中所没有的课题。

The topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent AC to transfer DC module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2The feedback self-checking module is constructed by singlechip compositive 16 high accuracy A/D , established a closed-loop control system through this module and improved system's overall precision effectively.

本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度A/D构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.

匹配装置自动测试台是检测匹配装置性能的检测工具，其重要的技术指标是精度与可靠性，其高精度是作为检测匹配装置的前提，可靠性是决定了检测结果的可靠度。本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度a/d构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

This paper is mainly about research and design on charger, discharger and single phase PWM rectifier of this scheme.

本文主要对课题方案中的充电模块、放电模块、单相PWM整流器进行了研究设计。

Because of reasons pointed before, a suit of new solution of GPS intelligent inspection system is presented in this paper. This system integrates PPC and GPS receive module compactly, conquers some problems such as instability of system work, fallibility and discommodity of operation. These problems are lead by PPC link GPS through inserting card or line.

鉴于以上原因，结合掌上电脑和GPS的新技术，本课题针对GPS智能巡检系统提出了一套新的解决方案，将掌上电脑和GPS接收模块高度集成为一体，克服了以前插卡或连线式GPS产品导致的系统工作不稳定、不可靠和操作不方便等问题。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐