高峰值功率重频脉冲固体激光器

综述了高峰值功率重频脉冲固体激光器的发展现状，对其中的Ｑ开关、腔倒空、锁模等窄脉冲技术和放大技术进行了分析，展示了高峰值功率重频脉冲固体激光器的发展前景。     

步进式加热炉炉温优化设定模型及软件开发

针对线材厂步进式加热炉实际工况，提出了基于经验规则的炉温优化设定模型和在线自学习获取知识的思想，并以炉温优化设定模型为核心，开发出加热炉计算机控制系统的优化运行软件。     

燃煤MHD发电Cr25Al5电极材料的腐蚀行为研究

采用Ｃｒ＿（２５）Ａｌ＿５合金进行煤渣／种子条件下静态腐蚀试验（温度１３７３－１５７３ｋ，时间５０－１５０ｈｒ），试验后得出三种温度下腐蚀重量变化与腐蚀时间的关系，并借助金相显微镜、扫描电镜和俄歇分析进行有关形貌及成份分析，试验表明，温度是材料腐蚀的主要因素，在１４７３ｋ条件下材料的抗蚀性最好，Ａｌ、Ｓｉ元素在腐蚀过渡层中富集，Ｃｒ元素变化不大，但有从基体向外扩散的趋势。由此，这一材料若能进一步改进，可望在控制壁面温度的半热壁型通道中进行试验研究。     

人工神经元网络测井解释软件系统

王大力，何清源．人工神经元网络测井解释软件系统．测井技术，１９９４，１８（４）：２５７～２６４在复杂岩性地层的测井解释中，常规的方法常把岩石的矿物成分设想得比较简单，评价地层岩性时需要大量的人工分析。本文提出运用人工神经元网络理论的测井解释软件系统。系统用自然伽玛能谱测井，结合实验室资料可准确确定粘土类型和求出粘土含量。选用了一种稳定性好、快速的优化算法，使用孔隙度测井资料求出孔隙度值，整个系统算法上力求快准、解释上力求尽可能减少人工干预，该软件系统经试用效果较好。     

Transient analysis of an advanced static var compensator using quad-series voltage-source PAM inverters

This paper deals with an advanced static Var compensator (ASVC) using quad-series voltage-source PAM inverters. The ASVC consists of four three-phase voltage-source inverters with a common dc capacitor and four three-phase transformers, each primary winding of which is connected in series with each other. Each inverter outputs a square-wave voltage, while the synthesized output voltage of the ASVC has a 24-step wave shape. This results not only in a great reduction of harmonic currents and dc voltage ripples but also in fewer switching and snubbing losses. In this paper, transient analysis is performed with the focus on the response of reactive power and the resonance between the dc capacitor and ac reactors. Experimental results obtained from a small-rated laboratory model of 10 kVA are also shown to verify analytical results based on the p-q transformation. The analytical results help in the design of system parameters such as the capacity of the dc capacitor and feedback gains.     

Onset of gas self-induction and power consumption after gas induction in an agitated tank

The behavior of inducted gas from liquid surface and the; power requirements in an agitated tank using a mechanical agitator are studied in order to increase the amount of gas self-induction and the gas retention time for gas absorption. A 45° six-blade downward impeller turbine was utilized in this study. Air and water, air and 40 wt% 60 wt%, and 80 wt% of glycerin water, and air and 106 cP silicon oil were employed as gas and liquid phases. Variables which were studied included geometrical factors (immersed depth of impeller, baffle with and diameter of impeller) and the physical properties of the liquid (viscosity, density, and surface tension). The correlations for the onset speed of impeller and power consumption after gas induction in the agitated tank are established from our experimental results. The amount of gas self-induction from the liquid surface in the agitated tank increases with increasing impeller diameter and speed and decreases with increasing baffle width, depth of impeller and viscosity of liquid.     

Hierarchical intelligent control with flexible AC transmission systems application

A novel hierarchical intelligent controller configuration is proposed using an artificial neural network as a control-mode classifier in the supervisory level and a set of pre-designed controllers in the lower level. Controller outputs are modified nonlinearly by the classifying signals in a structure resembling one artificial neuron with adaptively changed weights. The lower-level local controllers are implemented using neural networks. An illustrative example of this approach is based on the transient stabilization of a single-machine infinite-bus system studied in Flexible AC Transmission Systems (FACTS) research.     

解Job－Shop调度问题的一个遗传算法

本文首先介绍了遗传算法的基本概念和流程，然后叙述了如何把Ｊｏｂ－Ｓｈｏｐ调度问题编码成为遗传算法的形式，并解释了对于实现这一算法中一些问题的考虑．最后给出了算法运行结果并对结果与算法做了总结。     

最新水冷式全固态数字调幅600kW中波发射机

数字调幅制式是当前国际上较先进的调制技术，ＤＸ系列全固态数字调幅中波发射机的电声指标和工业效率都是很先进的，过去的ＤＸ大功率机采用风冷方式，本文介绍了最新水冷ＤＸ－６００发射机的设备情况和技术特点。