大型球面天线线馈源结构光机电综合设计研究

结合球面望远镜线馈源结构的特点,提出了一种球面望远镜线馈源结构的光机电一体化设计新方案,并对悬索结构的非线性静动力分析进行了初步探索．     

电网电压无功控制浅析

介绍对电压无功进行合理控制的原则,及实现电能质量最优化的方法。     

电力系统电压稳定灵敏度分析方法综述

本文综述了灵敏度分析方法在电力系统静态电压稳定分析中的应用现地各种灵敏度指标进行了总结和评述，并提出了安装灵敏度分析的建议。     

PLC、变频器在竹节纱装置中的应用

本文介绍了一种以变频器和PLC为核心的竹节纱装置，该系统在同步控制、抗干扰处理和用程序产生定时器等方面的设计具有独到之处，使该系统具有良好的性能。     

遗传算法在过程控制参数拟合中的应用

在简单遗传算法的基础上,对交叉运算和变异运算进行了改进,针对过程控制参数多且要求精确度高的特点,设计了一种快速遗传算法,并在BP神经网络权值训练和热工对象传递函数参数拟合中进行了应用。仿真结果验证了该算法的实用性。     

Agent-based self-healing protection system

This paper proposes an agent-based paradigm for self-healing protection systems. Numerical relays implemented with intelligent electronic devices are designed as a relay agent to perform a protective relaying function in cooperation with other relay agents. A graph-theory-based expert system, which can be integrated with supervisory control and a data acquisition system, has been developed to divide the power grid into primary and backup protection zones online and all relay agents are assigned to specific zones according to system topological configuration. In order to facilitate a more robust, less vulnerable protection system, predictive and corrective self-healing strategies are implemented as guideline regulations of the relay agent, and the relay agents within the same protection zone communicate and cooperate to detect, locate, and trip fault precisely with primary and backup protection. Performance of the proposed protection system has been simulated with cascading fault, failures in communication and protection units, and compared with a coordinated directional overcurrent protection system.     

Determination of capsaicin and dihydrocapsaicin in Capsicum anuum and related products by capillary electrophoresis with a mixed surfactant system

An easy, rapid, sensitive, and cheap capillary electrophoresis (CE) method based a mixed surfactant system formed by sodium dodecyl sulphate (SDS) and polyoxyethylene sorbitan monolaurate (Tween 20) as modifier in the buffer was reported. Quantitative analysis of capsaicin and dihydrocapsaicin in Capsicum anuum, pepper sauce and porous capsicum plaster was demonstrated. After conducting a series of optimisations, baseline separation was obtained for the analytes within 5 min under the optimum conditions (15 mM sodium tetraborate–0.05% (v/v) Tween 20–2.2 mM SDS buffer (pH 10.1), 20 kV voltage, 214 nm UV detection). The method resulted in excellent linearity, with r² of regression equation of 0.9994 and 0.9996 for capsaicin and dihydrocapsaicin, respectively. Recoveries were in the range 90–107% and 92–109% for capsaicin and dihydrocapsaicin, respectively.     

活性炭吸附法联合脱硫脱硝技术分析

分析了活性炭吸附法联合脱硫脱硝的原理、工艺流程及其优缺点的比较,指出活性炭吸附法脱硫脱硝技术是一种先进的烟气净化技术,是未来烟气脱硫脱硝技术的发展方向。     

三电平整流器弃用中矢量的对称三区电压矢量调制策略

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家用电器CCC安全检测中电路结构案例分析

本文对家用电器中的一种不符合安全标准的电路结构案例进行分析,根据GB4706．1—2005标准中相关条款的要求,提出了家用电器CCC安全检测过程中的电路结构分析、试验和整改方法。