系统的

In Chapter 4, using the points of view of dissipative theory, the dissipative structure characteristics of ecological-economic system in the Changjiang River basin is analyzed, the development course and evolution characteristic of the ecological-economic system in the Changjiang River basin is demonstrated, and at last the negentropy sources and the entropy value of the ecological-economic system in the Changjiang River basin is radicated.

第四章运用耗散结构观分析研究了长江流域生态经济系统耗散结构特征，并用耗散结构理论论证了长江流域生态经济系统演变过程与演化特征，最后确立了长江流域生态经济系统的负熵源与熵值。

At first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu-lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band-pass filter, alternating amplifier, phase sensitive demodulatorn, pulse-width modulation, frequency scale circuit, moment current generator. Finally, using the graphics program language LabV-IEW which is designed for testing field especially by NI accomplishes the solfware design of testing system,realized the testing functions.

首先对加速度计及其测试技术的发展历史和现状，液浮摆式加速度计的工作原理和数学模型等作了简要的介绍，然后确定了以二元调宽脉冲再平衡测试回路为设计方案，并从控制理论的角度进行了分析，着重研究了系统中各部分的传递函数，利用系统开环传递函数分析了系统的稳定性，同时设计了系统的校正网络；分析了二元调宽脉冲再平衡测试回路的分辨率、采样约束以及测试精度等基本问题，并按照系统分析的结果设计了包括前置放大、带通滤波、交流放大、相敏解调、脉宽调制、频标电路以及力矩电流发生器等测试系统各部分硬件电路，验证了电路的正确性，最后按照测试系统的要求，采用了美国NI公司专为测试领域所开发的虚拟仪器工具——LabVIEW作为测试软件开发工具，利用该图形化编程语言完成了测试系统软件部分的设计，实现了测试功能。

Water cycle system revampment of the plant is introduced in detail, the application of high voltage inverter in water cycle system revampment is stated.

重点介绍了川西北净化厂循环水系统的改造方案和应用高压变频器实现温差控制与压力低值钳位选择性控制系统，分析了循环水系统改造后节能情况。

Key factors influencing urban agglomeration highway transport network system are sought out by using systematic structure model analysis method. Three hierarchies of urban agglomeration highway transport network are abstracted such as metropolitan district, inter city and external highway transport. Four kinds of structure morphology such as network of ringy and radial road surrounding one central city, decentralized network with multiple central cities, zonal and stretchy network, and combined network are studied out.

采用系统结构模型分析法寻找影响城市群公路交通网络系统的关键因素；提炼出城市群公路交通网络市域、城际、对外交通三个层次系统；拟定了单中心环放式、多中心分散式、带状伸长式、组合型四种城市群公路交通网络结构形态。

Experiments are done. The results of experiments are satisfactional and consistent with theory. The results of experiments indicate the design of the hydraulic loading is right.

利用所开发的单片机测控系统对液压加载系统进行了阶跃响应和频域响应试验研究，试验结果表明，液压加载系统完全能满足液压悬挂系统的要求，并且与理论分析结果一致，说明液压加载系统的设计和控制方法是正确的。

On the ecosystem health, definitions from utilization and ecosystem views are introduced, the contents and difficulties in assessing it are discussed. On the biodiversity enhancement, the relationship between forest structural complexity and forest biodiversity are discussed, the significance of old growth structure are highlighted, and measures of changing forest structure to promote forest biodiversity are put forward. On the landscape planning in forest management, some patterns, theoretical foundations and models are introduced, especially three conceptual models, i.e., key habitat\|corridors model, nature landscape model, and supportive features model. On the alternative silvicultural systems, reasons for developing alternative silvicultural system by mimic of nature disturbance are discussed, and some advanced techniques and their ecological basis are noted. Finally, on the ecosystem service, its contents and importance of assessment are illustrated.

关于森林生态系统健康，讨论了不同角度对生态系统健康的定义和不同层次上的生态系统健康的内容及评价生态系统健康的困难所在；②关于森林生物多样性，探讨了森林结构复杂性与生物多样性的关系，老龄林结构对森林生态系统的意义和作用，以及如何通过经营调整结构促进生物多样性；③关于森林经营的景观规划，描述了进行景观规划的途径、理论和模型，并对三种概念模型进行了介绍；④关于森林经营的替代技术体系，介绍了模拟自然干扰设计替代技术体系的原理，分析了替代经营技术体系产生的原因和有关最新技术研究进展；⑤关于森林生态系统服务，讨论了生态系统服务的基本内容和评价在森林生态系统管理中的重要意义。

From the view of carrying capacity, we advanced the concept of carrying relationship : sociometric activity is the driving factor, while ecological environment is passive; the interface relationship between them is the press are an.

为深入地探讨城市生态系统内部各要素的相互作用关系，将自然生态系统承载力理论扩展到城市生态系统，提出城市生态系统的承载机制概念。

This project is aimed at those two hot points and has developed the modeling and algorithm on nonsmooth problems into stochastical and in fluied enviroument fields.

本项目针对上述两个热点问题展开系统研究，研究领域涉及随机非光滑系统和流体环境中非光滑系统的建模方法和算法。

Application need for analysis books management information system, design the theories according to the database one-step one-steply give outed the systemed the needed the manual, partial ered the diagram, overall situation ered the diagram, systemed the relationed the mode, son moded, and make use ofed the Access to establish the database.

第四章分析了图书管理信息系统的应用需求，按照数据库设计理论一步一步地给出了系统需求说明书、局部ER图、全局ER图、系统关系模式，子模式，利用Access建立了数据库。

Combining the Global Positioning System and Geographic Information System in rail traffic, which could increase positioning precision, reduce trackside equipment, decrease the cost of construction and maintenance, has become a development direction in Train Control System.

将全球定位系统和地理信息系统结合在一起应用于轨道交通中，可以提高列车定位精度、减少轨旁设备、降低建设和维护成本，这已经成为列车运行控制系统的一个发展方向。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。