西北电网水电参与市场化运营若干问题的研究

随着我国市场化的推进，水电正酝酿逐步参与到电力市场化运营中去。水电参与电力市场竞争，有利于市场的有效性，可以在更大范围内利用市场机制优化资源配置，健全电价机制，优化水能源的利用，更好地为经济社会的协调发展服务。在详细分析西北电网水电参与市场化运营问题的基础上，针对水电的特有规律，提出了相应的建议。     

激光切割工艺参数优化数据库系统

用Visual Basic 6.0和用SQL server 7.0设计了激光切割工艺参数数据查询系统.能实现对常用材料的激光切割工艺参数进行查询.同时,提供了方便的数据库维护方法,提出用户基于Web技术的数据库更新方法.     

纺织花型准备系统

这篇论文介绍一个智能花型准备系统,简介它的硬件配置,该系统既可用于提花又可用于 印花织物的花型准备,它的花型设计特点是:对输入图案素材进行轮廓抽取,等倾压缩存入 素材库,按某一数学模型采用随机定变方法自动创作图案,创作好的图案经过计算机作工艺处 理后输出,以加工花型载体.     

对构建高校后勤危机管理体系的思考

本文根据高校后勤服务的特点，引出高校后勤危机和高校后勤危机管理的概念，并在进一步分析了高校后勤危机的诱因、主要特点、特殊性和构建高校后勤危机管理体系的必要性等基础上，提出了构建高校后勤危机管理体系所依据的理念、原则和三个阶段。     

Power-handling capability for RF filters

A simplified method for evaluating the power-handling capability inside an RF filter has been introduced based on the general cross-coupled prototype network theory, modern EM modeling techniques, and well-established breakdown threshold analysis. The electrical field strength and voltages evaluated using either the single-cavity resonator (eigen mode) model or simply the prototype model have been presented and compared against the direct EM computation of the complete filter structure. Close agreement has been found between the full EM modeling and the scaling of a single resonator or even prototype network analysis only. This procedure is expected to simplify the multipaction and ionization breakdown analysis of filters and filter-based diplexers and multiplexers. The method presented is general and is applicable to all filter types that can be described in a circuit model. Practical issues such as the multicarrier operation, sharp edge condition, design margin, and prevention techniques are also covered.     

Characteristics of tunneling and impact ionization in ZnS:Mn-based thin-film electroluminescent structures

A method for measuring the characteristics of tunneling and impact ionization in thin-film electroluminescent emitters is suggested. This method makes it possible to find time dependences of the space-charge layer thickness near the anode and the length of the impact ionization region, to determine more exactly the time dependence of the field in the potential barrier at the cathode interface, the maximum depth of the surface states from which electron tunneling occurs, the minimum thickness of the barrier, and the electron tunneling probability, as well as the impact ionization rate for the deep centers related to structural defects of the phosphor layer.     

Structural transformations and strain effects in copper and copper-base alloys due to dynamic loading

The strain behavior and phase transformations in Cu-37 wt.% Zn brass, Cu-12.5 wt.% Al bronze, and copper (99.97%) are studied under two variants of pulse loading, i.e., converging shock waves and a flux of powder particles accelerated by explosion. The effects connected with uniform and localized strain caused by the action of shock waves are determined and the disperse structures formed in the materials under dynamic loading are analyzed. __________ Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 28–34, March, 2007.