系统的

And control problems such as optimal import rate control, optimal harvesting control, optimal birth control are investigated. By means of nonlinear functional analysis, differential equations, integral equations, and modern control theory, a number of research results are obtained, which are theoretically valuable and provide a solid ground for the practical use of our models.

本文系统讨论了几类年龄依赖的单种群和多种群动力系统，综合应用非线性泛函分析、微分方程、积分方程以及分布参数系统控制论等理论与方法，深入地研究了这些系统的解的存在性、唯一性以及非负有界性；研究了这些种群动力系统的最优输入率、收获率和出生率控制问题，获得了一批重要的理论成果。

The sufficient conditions to guarantee robust exponential stability for the closed-loop systems are obtained based on Linear Matrix Inequality, moreover, the approach of design of robust H# output feedback controller is introduced.3 The problem of reliable H# control for a class of Lur"e systems with polytopic uncertainties is studied when all control components are operational as well as when some control components experience failures, the design approach of reliable H# controller is also obtained.4 Considering a class of uncertain Lur"e singular system with time-delays, the problem of robust stability is investigated based on Barbalats Lemma and nonsingular linear transformation of model reduction.

针对一类不确定Lur'e奇异时滞系统，基于Barbalat引理以及非奇异降阶变换，讨论了Lur'e奇异时滞系统的鲁棒稳定问题，提出了鲁棒H_∞状态浙江大学博士学位论文反馈控制器的设计方法。5、针对一类具有饱和执行器的不确定Lur'e奇异系统，提出了时滞依赖的鲁棒稳定与鲁棒二次镇定的充分条件，所的结果不需要参数的整定。6、针对任意协方差有界的有色噪声，讨论了一类不确定Lur'e奇异系统的鲁棒凡滤波问题，得出了鲁棒几滤波器设计的充分条件。7、针对一类不确定Lur'e时滞系统，通过线性变换，把它转换成奇异系统，根据奇异系统鲁棒控制理论所得出的鲁棒稳定与鲁棒镇定控制器设计的充分条件具有很小的保守性。

In the system of high precision and low speed, Because of the existence of the nonlinear friction, the static and dynamic performance of the servo system is very bad, such as stick slip, hunting, large error and so on, Because the traditional control of PID is hard to solve the nonlinear problem of the servo system, so this paper begins to introduce a new control method which is named adaptive fuzzy PID, It utilizes the rule of the fuzzy control to adjust the parameter of proportion, integral and differential on line, So this control method has some intelligence to improve the static and dynamic performance of the servo system.

在高精度、超低速伺服系统中，由于非线性摩擦环节的存在，使系统的动态及静态性能受到很大程度的影响，主要表现为低速时出现爬行现象，稳态时有较大的静差或出现极限环振荡；由于传统的PID 控制很难解决伺服系统中的非线性问题，因而不能适用于高精度、超低速伺服系统；本文通过引入模糊自适应整定PID控制，利用模糊规则在线调整比例、积分、微分环节，使系统具有一定的智能，从而非常明显的改善伺服系统的静态及动态性能。

Based on the analysis of the requirements for process industry, development, implement, and maintaining of software system project are considered. The function and performance specification, which is the aid of software system designing, are shown.

1分析了流程工业实时数据库系统的需求背景，从项目开发、实施、维护、质量等角度考虑系统的非功能性需求，系统地分析了实时数据库系统应当具有的功能，并给出了性能指标的要求，明确了系统设计的目标。

The study on simulation model of 12-pulse transformation rectifier with equilibrium reactor was proposed. The effect and principle of equilibrium reactor in rectifying circuit was analyzed.

引言1将计算机仿真技术应用于飞机电源系统的研究，可以降低系统的研制成本，提高系统实验、调试过程的安全性，还可以不受研究系统的规模和复杂性的限制，因此，用系统仿真的方法研究飞机电气系统，近年来受到国内外的普遍关注。

Based on the fact that it lacks of quantification about the theory at present, this paper puts forward the new idea about mechanism of system coupling using emergy method in the ecotone between agriculture and pasture in North China as an example, where has serious dilemma of economical and ecological.

以农牧交错带为例，针对在生态经济系统目前该理论的定量化方面研究不足的事实，提出用能值方法考虑农牧交错带系统耦合的机制，并指出农牧交错带系统耦合机制应建立在土地利用方式、子系统间能值转化过程和生态系统的能值储备上；同时影响系统耦合机制的主要因素有初级生产力的大小、畜牧业的内部结构和畜牧业的发展规模以及生态系统服务价值的大小。

By deep researching into the intelligent controls-oriented virtual instrument and its development system,the quintuple systematic model based on computer is introduced into system modeling of developing system of ICVI,the model of development system of ICVI is built up and dissertated it in detail.

介绍了智能虚拟控件及其仪器的有关概念、原理；讨论了基于计算机的系统建模的五元模型；通过对智能控件化虚拟仪器及其开发系统的深入研究，将基于计算机的系统五元模型引入到智能控件化虚拟仪器开发系统的系统建模，提出并详细论述了智能控件化虚拟仪器开发系统的模型。

The dissertation gives a brief description about the developing situation and control theory of robot firstly, and then the underlying idea and characteristic of CTC are introduced in detail. Subsequently three classes of control strategies with compensation control structure which are based on CTC are proposed. The overall idea is that the system of robotic manipulators is decomposed as two parts: one is nominal system with perfect knowledge of dynamic model and the other is system with uncertainties. CTC is used to control nominal system. For uncertainties system, we utilize the regressor of robotic system or bounding function on uncertainties to design different compensation controllers. The outputs of the two parts control the robotic

本论文首先介绍机器人的发展概论概况，然后对计算力矩控制算法的基本思想和主要特点作详细的阐述，紧接着探讨基于计算力矩结构不确定性机器人的补偿控制方案，其中的基本思想都是将不确定性机器人系统分解成标称系统和不确定系统：对于标称系统，采用计算力矩控制；对于不确定系统，利用机器人系统的回归矩阵或集中不确定性上界的包络函数，设计不同的补偿控制器。

Compare with other traditional data acquisition modules, the salient point of this system is that it can access Ethernet, achieved remote data acquisition. At the same time embedded by the uC/OS-II operating system, achieved a multi-task operating environment. In addition the system construct a kind of flexible 32-bit embedded hardware system composed by SOPC technology. The system can add or reduce components freely according to the requirement of customers.

与传统的数据采集模块相比，本系统的主要特点是可接入以太网，实现远程数据采集；同时系统嵌入uC/OS-II操作系统，实现了多任务的操作环境；另外本系统结合了SOPC技术在FPGA上构建了一个灵活的32位嵌入式硬件系统，该系统可以根据用户的需求进行自由裁剪。

Finally, we design a series of module and system testing. From the result of these testing, we get the conclusion: in our Centrifuge Experiment System which is based on Wireless Optical Communication and Electrical Slip Ring, both data and power can be transmitted well between the stator and the rotor of Centrifuge, So the validity of our design can be proved.

最后，本课题设计了充分的实验，分别从功能模块和系统的角度，对本无线光传输系统和能量传输系统进行了测试，从测试结果可以看出：在以无线光传输作为信息传输方式和以导电滑环作为能量传输方式的离心机系统中，无论是信息传递，还是能量传递，均能满足系统的设计性能指标，由此证明了本论文研究工作的正确性和有效性。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。