系统发生的

In this paper, the theory and approach of differential geometry are employed systematieally and the analytic expression of the nonlinear excitation eonrtol stratege is worked out.

由于电力系统强非线性的影响，当系统状态发生较大变化时，这些控制器的效果都难以令人满意。

Based on the equilibrium equation of an arch element the cubic nonlinear dynamic model with second order is established and the nonlinear differential dynamic system without constant term is obtained through a transfer process of T=U+b. Hence three fixed points and the homoclinic orbits are found. The critical condition of the chaotic vibration of the elastic arch is given by using the method of Melnikov function. The numerical results of the stationary and chaotic motion are given and discussed.

首先利用拱的单元平衡方程建立了拱的二阶三次非线性动力学模型；然后通过变换使方程转化为不含常数项的非线性微分动力系统，并由此得到无扰动系统的3个不动点与同宿轨道；再用Melnikov函数法给出了发生混沌的临界条件；最后给出了该系统出现定常运动和混沌运动的数值结果。

ABSTRACT This thesis investigated the technology of error diagnosis and error recovery in flexible assembly systems .

柔性装配系统中所固有的不确定性常导致系统工作发生故障，这是影响其得以实际应用的一个关键。

The research advance on organogenesis, somatic embryogenesis and protoplast regeneration system of soybean are introduced in this paper.

终于在20世纪80年代初期有了转机，人们选择了幼胚、幼胚子叶或胚轴为外植体，用异常高浓度的植物生长调节物质，建立了大豆的体细胞胚胎发生和器官发生再生系统。

Siltp expresses in stem, leaves and grains. Using software PAUP to analyze evolution of LTP from 17 different plants, phylogenetic tree allows the conclusion that LTP has four groups. Differentiation happened earlier in wheat,while in the other monocots such as maize, millet,barley and rice happened later.

利用软件PAUP对17种植物的LTP进行进化分析，从进化系统树可以看出LTP有4个分支，其中，小麦发生分化较早，其它几种单子叶植物如玉米、谷子、大麦和水稻分化较晚，说明发生了早期的基因复制事件。

The variations of machine parameters, due to operation temperature, saturation level of rotor flux , rotor time constant, etc., lead to poor dynamic performance and incorrect stationary point of operation.

由于系统运行过程中的温升、磁饱和等因素会导致电机的参数发生变化，参数变化势必会影响拖动系统的动态性能并且可能会导致系统的不稳定运行。

With lots of calamitousness which is coursed by IT system breakdown occurred these years, people gradually know that they need a set of tools and systems to management the IT infrastructure facilities to make sure IT system can offer good IT service, reduce load of IT manager and increase effectiveness of IT management.

随着近年来形形色色IT系统故障导致的灾难事件的发生，人们开始认识到需要一套工具、制度和体系去管理企业的IT基础设施，保证IT系统为企业业务提供良好的IT服务、减轻IT管理人员的负担、提高IT系统管理效率。

The so-called intelligent fire auto alarm system, must be: The smoke which the use survey component has period produces, warm the fire, the light equisignal to simulate the quantity form, transmits together with the outside related environment parameter for the alarm apparatus, the alarm apparatus again the mass # which saves according to the gain # and the interior, judges the fire using the fire model criterion whether to exist, such system is called the intelligent fire auto alarm system.

所谓智能火灾自动报警系统，应当是：使用探测器件将火灾发生期间所产生的烟、温、光等信号以模拟量形式，连同外界相关的环境参数一起传送给报警器，报警器再根据获取的数据及内部存储的大量数据，利用火灾模型判据来判断火灾是否存在，这样的系统称为智能火灾自动报警系统。

To avoid the collision accidents of ships at sea, with the universalizing and application of computer, and the development and maturity of the technology of Expert System and Artificial Intelligent, this paper developed an intelligent collision avoidance expert system for navigation. The main research work centers on several aspects, which will be represented as below:By the navigation rules" understanding and analyzing, and by the navigation experience and navigation samples" collecting and trimming, we put forth and build a multi-unit and layering KB systematic structure, and implement the KBM. According to features of different knowledge, we adopt multifarious KR, such as: frame KR, production rule KR, procedure KR. We also build a multi-inference system, which based on analog inference, forward illation inference, conversion inference and meta-rule inference. At the same time, we develop each reasoning algorithm. For some problems in collision avoidance region during the building of the expert system, we put forth and build a set of models to solve them using neural network technology.

为了避免船舶间碰撞事故的发生，结合计算机技术在各类船舶中的普及与应用、专家系统技术及人工智能技术的发展、成熟，本文研制、开发了一种具有一定智能的航海避碰专家系统，主要内容包括以下几个方面：通过对航海规则的理解与分析，对航海经验、航海实例的搜集、整理，提出并建立起了航海避碰专家系统的多元分层知识库体系结构，并实现了知识库的管理；根据不同知识的特点，分别采用了框架、产生式规则、过程等多种知识表示方法；提出了一种基于类比推理、正向演绎推理、换位推理及元级推理等的多种推理机制，并建立起了相应的推理算法；引入神经网络技术，针对在建立专家系统过程中所遇到的有关避碰领域内的一些难题，提出并建立了相应解决问题的模型，其中包括：船舶类型的识别，会遇态势的分类及避碰危险的评估。

The 450/80t casting hoist crane host lifts the organization disposition emergency brake goal is prevented after the work brake transmission chain appears the question or the host lift the system overspeed,the emergency brake can the rapid ground floodgate,thus avoids having the molten steel pot effectively to crash and so on significant acci.

450／80t 铸造起重机主起升机构配置紧急制动器目的是防止当工作制动器之后的传动链出现问题或主起升系统超速时，紧急制动器能迅速地上闸，从而有效避免发生钢水罐坠落等重大事故的发生。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。