车用柴油机的工作特性与调速器的参数选择

本对车用柴油机的工作特性，即速度特性－调速特性，进行了分析探讨，并提出了该特性曲线的预测计算程序，为喷油系统和柴油机的匹配提供了一个辅助工具，通过计算和分析，还阐明了获得理想工作特性的条件。     

柴油机飞锤式离心调速器动态特性的研究

本文按自动控制原理,建立起由四个环节组成框图的数学模型。通过对RSV 型调速器配2100柴油发电机组的计算结果与实测值对比,两者基本一致,说明此数学模型精度较高。文中应用此模型研究了调速器的几个主要参数对动态特性的影响,为设计调速系统提供了有用的依据。     

高速弹性调速器调节系统现场问题分析

针对采用高速弹性调速器为转速敏感元件的调速系统在实际运行中遇到的问题,从理论上分析了其机理,或提出解决方案,可以作为电厂和制造厂的参考。     

Automatic generation control of power system using a novel quasi-oppositional harmony search algorithm

The present work approaches a novel quasi-oppositional harmony search (QOHS) algorithm, as an optimization technique, for its optimum performance in the subject area of automatic generation control (AGC) of power system. The proposed QOHS algorithm is applied with an aim to converge rapidly towards the optimal solution(s) that houses both the characters of two guesses, i.e. opposite-point and quasi-opposite point. The area of concern of this study is to discuss the multi-objective problems of an interconnected power system for the benefits of AGC. The proposed QOHS algorithm is, individually, applied to single-area, precede to two-area considering the non-linearity effects of governor dead band and generation rate constraint and, finally, extended to four-area power system showing the consequences of multiple load disturbances. A case of robustness and stability analysis are also investigated for the studied two-area power system model. The control strategy, for the dynamic power system model, is based on area control error. The simplicity of the structure and acceptability responses of the well-known proportional–integral–derivative controller enforces to implement as a controller in this work. The comparative evaluation of the proposed QOHS algorithm is carried out by the way of comparing the dynamic performances of the studied power system model with those offered by other algorithms reported in the recent state-of-the-art literature. The simulation works, presented in the paper, reveal that the proposed QOHS algorithm may be effectively utilized for the purpose of AGC study of power system having varying degrees of complexities and non-linearities. Moreover, the proposed QOHS based control strategy adopted in this work provides a robust and stable speed control mechanism.     

论周馥在两江总督任期的经济改革举措

两江总督的辖区是清代全国的财赋重心,社会经济出现了各种新气象,但到晚清时期也暴露出许多问题,如外国资本主义的经济侵略日甚一日、两淮盐政废驰、金融市场混乱、矿业弊病丛生等等。周馥于1904年11月至1906年9月担任两江总督。在近2年的任期内,周馥整饬盐政;勘查三江矿藏,发展民族矿业;整顿海关,发展对外贸易;学习西方,发展新式渔业;竭力稳定金融市场秩序等,这些措施取得了一些成效,对江苏、安徽、江西3省社会经济的发展起了一定的推动作用。     

2301A电子调速器原理与应用初探

本文介绍了2301A电子调速器的型式、结构与原理，有助于用户灵活应用，方便用户操作与维修。     

New Territories: Deconstructing and Constructing Countryside – The Great Divide of Rural and Urban In Hong Kong

When mass immigration led to a sixfold population increase in the first two postwar decades, the Hong Kong government's response was to build nine new towns, designate 40 per cent of the land as country parks for urban dwellers' benefit, and allocate buildable plots as compensation to displaced villagers. Guest-Editor Christiane Lange examines how these well meaning efforts broke the cultural and social ties between people and the land that are essential to sustaining a productive rural landscape: a cautionary tale for designers and planners involved in developing the countryside.     

浅谈漫湾电厂二期调速器的调试

调速器是发电厂的主要设备之一。调速器运行参数是否满足要求直接关系到电网的安全、电能的品质。调速器的改进、更新是对电网质量的改善。总结了漫湾电厂二期调速器系统的调试、维护经验。     

一种新型限速器

本文所述的是一种新途径，其中，传感器，电子部件以及与安全性能相关的软件取代了传统的机械式限速器。特别要关注的是与安全性能相关的软件的开发过程，还有此类电子系统的硬件结构，不仅要考虑安全问题．还要考虑其可靠性。