面向公共机房的收费管理系统

上机计费是公共机房管理的重要组成部分。本文从应用的角度出发,给出了一个基于SQL Server数据库的面向公共机房的计费系统的设计,对其中的几个主要模块进行了介绍。本系统功能设计较为完善,具有良好的应用前景。     

节瓜简易基质栽培试验初探

以菌渣和河砂为供试材料．配制成复合基质，进行节瓜无士栽培。结果表明，植株生长健壮，生育期提前，成本低，产量高．操作简单方便；当河砂、菇渣配比为6：4时，比砂培增产43．0％，净利润增幅达120．8％。     

Fermat数的若干结论

是根据数论中著名的数之一—— Fermat数的定义 ,探讨了它的一些结论 ,并逐一加以证明 .通过研究 Fermat数的若干结论 ,可帮助我们加深对 Fermat数的理解 .     

经热处理的Fe80Cu20亚稳合金的电阻特性研究

采用机械合金化方法制备了Fe80Cu20亚稳合金粉末，压制成片状后分别在150℃、250℃、500℃进行了热处理，对500℃处理的样品进行了低温电阻测量。结果表理，样品的电阻表现为类似近藤效应的现象。     

乙型肝炎母婴垂直传播(综述)

综述乙肝母婴传播的途径及其阻断方法。乙肝母婴传播主要通过胎盘、乳汁、羊水及唾液传播。目前主要阻断方法为应用乙肝免疫球蛋白、乙肝疫苗及拉米夫定等治疗     

基于多散射中心模型的雷达目标识别方法

针对宽带毫米波雷达目标识别要求 ,提出了一种基于目标光学区多散射中心模型进行目标匹配识别的新方法。该方法首先基于多散射中心理论建立待识别目标的模型、利用遗传算法的全局优化能力进行目标识别。与常规的全姿态角匹配识别方法比较 ,具有需要的存储量、计算量较少的特点。仿真试验验证了该算法的有效性。     

纳米SnO2材料的低温电阻特性

本文研究了纳米SnO2材料在低温下（15－290K）的电阻特性，以及颗粒度对样品电阻特性变化的影响，并给出了材料的导电机理。     

A survey on routing in wireless sensor networks

One of the most important issues in wireless sensor networks is data delivery service between sensors and the data collection unit (called sink). Although sensor networks and mobile ad hoc networks are similar to some extent, they are radically distinct in many aspects. Sensor networks have many unique features, making them more challenging and need further research efforts. The existing routing protocols for sensor networks can be classified as indicator-based and indicator-free. In this survey, we make a comparative study of these protocols. Open issues and research directions are pointed out as guidelines for our future work.     

Recovery Properties of Polysulfone Hollow Fiber Chelating Membrane Modified with Thiourea for Mercury （ Ⅱ ）

The adsorption isotherms of the polysulfone hollow fiber chelating membrane modified with thionrea as chelating groups for Hg^2＋ were determined. The effects of mobile phase conditions and the operating parameters on removal performance of the chelating membrane for Hg^2＋ were also investigated. The recovery of Hg^2＋ decreased at low pH and the optimum range of pH was from 6 to 7. The feed concentration effected on recovery of Hg^2＋ at the specified loading amount of Hg^2＋. The Hg^2＋ could be removed from different concentration feed solution by chelating membrane. The increase of feed flow rate led to slight decrease of recovery of Hg^2＋ at the specified loading amount of Hg^2＋. The chelating membrane could be operated at height feed flow rate and a large-scale removal of H^2＋ could be realized. With the increase of load amount, Hg^2＋ recovery decreased, but the saturation degree of chelating membrane increased. According to required recovery of H^2＋ and the saturation degree of chelating membrane, the optimum loading amount of Hg^2＋ should be selected in the actual removal of H^2＋.     

《孙子兵法》在体育教学中的运用

《孙子兵法》虽为古代兵书，但它所蕴含的军事、哲学、管理等思想也适用于体育教学，对于体育教师的教学有很好的借鉴和指导作用。从“五事七计”的内容论述教学之道，以计为首；体育教师要具备的基本素质是智、信、仁、勇、严；备课要做到“知彼知己、百战不殆”；教学管理体现“令之以，齐之以武”的原则；利用“造势”来创造良好的课堂教学气氛。