系统的

The fourth chapter analyses the state of ecological, economic and social in Yuli oasis system from 1991, it is found that Yuli oasis system was in over loading state according to half richness, richness and modernization level from 1991, the fundamental reasons were fragility of environment, level lowness of economy development, draggling of basic establishment, lowness of population stuff, and lowness of living standard.

第四章对尉犁绿洲系统近10年来的承压超载状况进行了分析，结果发现，自1991年以来，在小康、富裕与现代化等不同生活水平约束下，尉犁绿洲系统都处于超载状态，生态环境脆弱、经济发展水平低下、基础设施落后、人口素质低下与生活水平处于较低水平是尉犁绿洲系统处于超载状态的根本原因；但从整体看，尉犁绿洲系统的承载状况趋向好转，主要原因在于尉犁绿洲人口规模小、人均资源利用指标处于较高水平、水利设施条件进一步改善和绿洲居民预期寿命始终处于较高水平。

From data real time requirement, system flexibility, system reliability, maintainability, and information construction in water supply system, it essentialized the specialty of the modern intelligent RTU.

从供水系统的数据实时性、系统柔韧性、系统可靠性、可维护性以及系统信息化建设等五个方面的要求出发，扼要说明了新一代智能RTU的主要特点。

In order to integrate the multi-earth stations,achieve the source shared and centralized management,and increase the synthetical benefits of the multi-earth stations and the system reliability,a matrix source-shared system for multi-earth station is designed,and the design method and the application condition are expatriated in the article.

为了把多个地球站有机地集成到一起，实现资源共享和集中管理，进一步发挥多个地球站的综合效益，提高系统可靠性，文中设计了多地球站矩阵化资源共享系统，阐述了系统的设计思想和应用条件，并在工程中实现了多地球站矩阵化资源共享系统的改造项目。

To make an analysis of the system feature of the intellectualized sorting system, it is proposed to the method of system modeling employing the fuzzy control theory.

分析了智能化分拣系统的系统特性，提出了用模糊控制理论建立系统模型的方法，设计了基于PLC分拣系统的模糊控制器。

The model of control system under voltage regulation mode on excitation system of synchronous generator is introduced,theoretical analysis and experimental study is then conducted for studying the control scheme of excitation,parallelling and improving the stability of grid,using high precision simulation software – Saber Designer.

本文首先建立了同步发电机励磁控制系统电压调节模式下的控制系统模型，并应用新型高精度数模混合仿真软件Saber Designer对该模型进行理论分析与仿真验证，对励磁控制系统的起励、并网切换及改善电力系统工作稳定性的控制策略进行了研究。

At first, setting up the arith relation between the signal input and the signal output of the generalized multi-carrier system of the Discrete Fourier Test spread-spectrum; then setting equilibria parameters of the frequency field equilibria subcarrier of the generalized multi-carrier system of the DFT spread-spectrum according to channel frequency response, channel noise variance and equilibria method; then calculating average power of useful signal, interferential average power between signals as well as noise variance of the generalized multi-carrier system receiving terminal of the DFT spread-spectrum according to the arith relation as well as the frequency field equilibria parameter, and recomputing available signal information noise ratio, so as to calculate the available signal information noise ratio of the generalized multi-carrier transmission system accurately, the method for estimating the available signal information noise ratio can be used for link self-adapting transmission solution of the generalized multi-carrier system based on Discrete Fourier Test spread-spectrum and radio material management.

一种DFT扩频的广义多载波系统的SINR估计方法，其通过首先建立所述离散傅立叶变换扩频的广义多载波传输系统的信号输入输出之间的数学关系，然后根据信道频率响应、信道噪声方差和均衡方法，设定所述DFT扩频的广义多载波传输系统的频域均衡子载波的均衡系数，再根据所述数学关系及所述频域均衡系数分别计算所述DFT扩频的广义多载波传输系统接收端有用信号的平均功率、信号间干扰的平均功率以及噪声方差，再计算有效信干噪比，如此以实现对广义多载波传输系统的有效信干噪比的准确计算，该有效信干噪比估计方法可用于基于离散傅立叶变换扩频的广义多载波传输系统的链路自适应传输方案和无线资源管理方面。

He wrote in 1954:"Feedback is a method of controlling a system by reinserting into it the results of its past performance."

他在1954年这样写到：&反馈是这样一种对系统进行控制的方式：它通过把系统过去的表现重新输入系统之中而完成对系统的控制。&

But methods of data assignment on homogeneous disk systems, such as striping, do not adapt to heterogeneous disk systems any more.

如果采用同构系统的数据分配和放置方法如 striping来管理异构系统，并不能针对异构系统中各个磁盘的性能差异来进行数据分配，降低了异构系统的性能。

If the XLPE cable on-line monitoring system, which is based on the method of superposing a low DC voltage on the neutral point of PT ,is used in 6-35 kV power system, the way of grounding of potential transformers and the shielding layer of cable must be changed.

PE电缆在线检测系统应用于6～35 kV中性点不接地系统时，改变了PT中性点和电缆屏蔽层的接地方式，因此必须分析系统正常运行及故障状态下检测装置对电力系统的影响，以评价检测设备的实用性进行讨论。

It syncretizes the excellency of early OO modeling method and language, and is a rich, precise and extensible modeling language for system development. Therefore, UML is used used in the whole course of software development.

因此，本文将UML应用于系统开发的整个进程中，通过其提供的多种视图从不同角度表现系统的静态和动态特征，完成系统的设计和实现，从而对整个系统有清晰的认识，并为最终的系统提供了相关的细节文档资料。

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