综述

ABSTRACT This paper presents results of online identification of hydrogenerators, a long-term running robust self-tuning regulator of generator excitation, governor power system stabilizer decoupled in multimachine systems, and an adaptive GPSS designed in frequency domain. 1. It presents a step-by-step zero cancellation method , accuracy weighted recursive least squares and approximate RLS algorithms, inferior limit of sampling time.

针对发电机励磁和调速系统建模与控制，针对多机电力系统的稳定性，本文综述了自适应控制理论及其在电力系统中应用的现状和发展方向后，在辨识、自适应控制结构和鲁棒性提高的措施上进行了研究，取得了水轮机调速系统现场辨识的成功，获得了长期稳定运行的鲁棒励磁自校正控制器、多机解耦的调速侧电力系统稳定器和频域设计的自适应GPSS。

E. block-pulse functions , a arbitrary piecewise constant functions which are orthogonal and unconcerned are introduced to analyze and synthesize fluid PWM system to solve some related problems of PWM system.

第一章首先通过对流体脉冲调制及相关技术的研究发展现状综述，阐明了寻求高效的分析与设计手段以推动流体脉冲调制系统研究、发展和应用的必要性和重要意义。

The major results about magnetic petrology of high-grade terrenes of Archean shield areas in the world are reviewed in this article,focusing on the relationship between rock magnetism and deformation, and metamorphism and intensity of magnetization of continental lower crust and its origin.

综述国际上有关太古宙高级地体磁性岩石学研究的主要成果，侧重高级地体岩石磁性与变形、变质等级的相互关系及大陆下地壳磁化强度及其成因机制等；提出了有关高级地体岩石磁性研究中值得注意的几个问题。

This main content of this thesis is divided into three chapters altogether: Chapter one summarizes the current situation of the environmental pollution, concentrate on danger of the aromatic hydrocarbon mainly, discuss the advantage of the biological method among several kinds of methods.

本论文主要内容共分为三章：第一章综述了环境污染的现状，主要集中在芳香烃的危害上，讨论了微生物治理环境污染在几种治理方法上的优势。

This article reviewed the current situation of the MAS of aromatic esters and prospected its future development.

该文综述了微波辅助合成芳香酯的研究进展，并展望了微波技术在芳香酯合成中的发展前景。

The teratogenical effects of arsenate and its negative effects on ecological environment were reviewed in this paper and measures to alleviate or dissolve the adverse effects induced by arsenate were put forward as well.

本文综述了砷制剂的毒副作用及其对生态环境的负面效应，并提出了减轻或消除砷制剂负面影响的应对措施。

Studies on the behavior of arsenic in the environment are very important in order to deal with these problems.

本文从生物地球化学行为的角度综述了关于砷在环境中迁移转化方面的研究进展。

Objective To review the recent research progress on shoulder arthroplasty, and to predict future research direction.

目的 综述肩关节置换术应用于肩关节疾病的现状和研究进展，展望可能的研究方向。

OBJECTIVE: To review the research status of dislocation after total hip arthroplasty.

目的：综述髋关节置换后不稳定的研究现状。

The thesis reviewed the research progress on structure and function of rice arthropod community.

本论文对国内外稻田节肢动物群落的结构和功能的研究进展进行了综述。

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