地方热电联产企业发展对策的探讨

介绍了泰州热电企业的运行情况，分析了各热电厂在技术改造、扩大热用户和强化内部考核管理方面的措施，探讨了地方热电企业应采取的对策和发展思路。     

脉冲电镀的正向电流密度对深镀能力的影响

主要通过在正反向电流比、频率、脉冲宽度一定的条件下,改变正向电流密度的大小来研究其对PCB整板电镀铜深镀能力的影响。从测得的数据可知随着正向电流密度的增大,深镀能力先变大后变小,并对这个问题进行了理论分析。     

铝电解电容器用橡皮塞中铁的测定

主要研究了用硫氰酸钾作显色剂，用分光光度法测定橡皮塞中铁含量的方法。并对国产和进口橡皮塞做了比较，为铝电解电容器质量水平的提高提供一条新思路。     

Environmental Effects of Hydro-Electric Power Generation in Africa and the Potential for Artificial Floods

Electricity is a fundamental requirement for economic growth, and hydro-electric power is often thought to be environmentally benign. However, the construction and operation of many hydro-power dams in Africa have had significant negative impacts on the environment and rural economies. Reduced downstream flooding has destroyed fisheries and starved the floodplain soils of moisture and nutrients. Often the worst-affected areas have no electrification and therefore do not benefit from power generation. New dams which are planned in Kenya and Tanzania have been specifically designed to make flood releases. This will allow electricity to be generated whilst maintaining a dynamic flooding pattern for the short-term economic importance of fisheries and agriculture and the longer-term importance of soil fertility and biodiversity. Involvement of local community representatives in deciding when flood waters should be released on the Phongolo River in South Africa has resulted in substantial benefits to floodplain users.     

中高频小功率电子元器件用非晶材料的开发与应用

随着电力和电子技术的飞速发展，相应的元器件向高频化，小型化，高效率和节能的方向发展，从而对元器件用材料也提出了更高要求。为此，本文概述了冶金部钢铁研究总院近年来所研究的用于开关电源，脉冲变压器，传感器，电流互感器和电感器等方面的非晶软磁合金的性能及其应用概况。     

西电东送战略研究

西电东送战略系在对我国东、西部地区自然资源和经济资源的差异性与互补重构的必要性研究的基础上形成与发展的。对西北、华北联网工程和西南水电能源基地建设的研究。主要围绕西部水电开发规模、时序、可能外送电力的能力、流向、，以及其经济合理性技术可行性展开。加强国家的产业、行业政策引导，实施多元资源互补策略，必将促进西电东送事业的发展。     

Monitoring Power Dissipation for Fault Detection

In this paper, we suggest that the dynamic power dissipation of acircuit can be used for fault detection. Even those faults which do notaffect static power dissipation can be detected by monitoring dynamic powerdissipation. We discuss how stuck-at, stuck-open, and redundant faults maybe detected by monitoring dynamic power dissipation. In many cases, theFourier spectra of the supply currents in the good and faulty circuits willalso be very different. Further, specific tests can be applied so as toimprove fault coverage. Power monitoring is verified using simulation, andalso experimentally, for example circuits.     

套管动力钳转矩监测系统

下套管作业时，套管螺纹联接质量的好坏直接影响着油井寿命，因此有必要研制一种套管动力钳转矩监测系统。以目前国内常用的ＴＱ－２０型套管动力钳为例，介绍了一种与之相配套的套管钳转矩监测系统的功能特点，测试原理，结构设计，并对实测各类紧扣曲线进行了分析。该系统采用主从机结构，主机为工业控制微机，从机为单片机系统，主从机采用远距离通信传输，大大地改善了工业控制微机的工况条件。该系统实现无人监控、自动记录、绘     

Series resonant ZCS‐PFM DC‐DC power converter with high‐frequency high‐voltage transformer link for high‐power magnetron drive

This paper presents a single lossless inductive snubber‐assisted ZCS‐PFM series resonant DC‐DC power converter with a high‐frequency high‐voltage transformer link for industrial‐use high‐power magnetron drive. The current flowing through the active power switches rises gradually at a turned‐on transient state with the aid of a single lossless snubber inductor, and ZCS turn‐on commutation based on overlapping current can be achieved via the wide range pulse frequency modulation control scheme. The high‐frequency high‐voltage transformer primary side resonant current always becomes continuous operation mode, by electromagnetic loose coupling design of the high‐frequency high‐voltage transformer and the magnetizing inductance of the high‐frequency high‐voltage transformer. As a result, this high‐voltage power converter circuit for the magnetron can achieve a complete zero current soft switching under the condition of broad width gate voltage signals. Furthermore, this high‐voltage DC‐DC power converter circuit can regulate the output power from zero to full over audible frequency range via the two resonant frequency circuit design. Its operating performances are evaluated and discussed on the basis of the power loss analysis simulation and the experimental results from a practical point of view. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(3): 79–87, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20126     

对新闻专业主义“现实性”的思考

新闻专业主义在西方拥有很大的理论市场,但这一理念所具有的理想主义色彩也不容忽视。多年来,新闻专业主义在其发展过程中不断受到严峻的现实挑战。本文分析了新闻媒体新闻专业主义缺失的深层原因,认为政治权力和市场机制等制度性框缚是新闻专业主义难以发挥其预期效果的根源所在。同时指出,新闻专业主义并非新闻改革的唯一出路。