大鱼际掌纹图像细化算法分析

使用基于像素标记的并行细化方法,采用删除边缘点和保留内点相结合的迭代方法,对大鱼际掌纹图像进行细化,该算法提取出的骨架线较好地保持了原图的拓扑特征.     

复合式膜生物反应器处理城市污水中水力停留时间的确定

本文在以复合式膜生物反应器系统为基础,以模拟城市污水为处理对象。通过运行条件优化研究,综合脱氮除磷效果及经济因素,将复合区水力停留时间控制在7h左右。此时系统总去除率为:CODcr≧96.28%、NH3-N≧97.54%、TN≧74.87%、TP≧74.34%,出水可以稳定保证在CODcr≦14.35mg/L、NH3-N≦0.74mg/L、TN≦9.02mg/L、TP≦1.05mg/L。效果较好。     

大同市建筑物通风方法研究

介绍了建筑中常用的几种通风方式,分析了大同市建筑物通风的现状及存在的问题,并提出了适合于大同市气候特点的通风方式．     

一种可适时监控的风光互补用逆变器研究与设计

研制了一种适用于风光互补发电系统的逆变器,介绍了该逆变器的电路拓扑结构、工作原理和实现方法。该逆变器由前级基于UC3875的Boost型隔离型全桥变换电路和后级基于单极性倍频SPWM调制的DC/AC全桥逆变电路组成,设计了两种监控方式,可实时监控逆变器的运行状态。研制了一台48 V/50 Hz/1 kW的样机,已成功应用于风光互补发电系统,为风光互补发电的的应用提供了一种理想的解决方案。     

The prospects for using the Internet in collaborative design education with China

The Internet has become widely available in higher educationinstitutions all over the world offering new possibilities incommunication, collaboration and delivery. This paper examines theprospects for using the Internet in the context of collaborative designeducation with China, using the School of Design of the Hong KongPolytechnic University as a case study. The critical success factors arediscussed. These involve serious investment of resources and changes atgovernment, institutional and personal levels on both sides of thecollaborative institutions. It is important to look into theinfrastructure and policy issues, access to information technology,curriculum adaptation and instructional design as well as staff andstudent attitudes in order to achieve the collaborative objectivesthrough an Internet supported strategy. Although the Internet is a costeffective delivery mechanism, the School does not intend to deliver itsdesign course materials to China purely online. Pedagogically, theSchool believes in a dynamic interaction between real and virtuallearning environments for quality student learning. Technically, thereare many impediments to overcome before teaching staff and students arefamiliar with the use of information technology and it will take sometime before most people in China can make full access of the Internet toconnect freely to electronic education. Therefore, a hybrid approach isproposed to train design educators and practitioners in Mainland Chinaby utilising traditional face-to-face teaching method and establishedtechnologies while developing the use of the Internetgradually.     

基于混合遗传算法的关系型数据库多连接查询优化

该文分析了关系型数据库的查询优化问题，针对多连接查询提出将遗传算法和爬山法结合，从而构造了关系型数据库多连接查询优化问题的混合遗传算法，并进行了实验计算。结果表明，用混合遗传算法解决多连接查询优化问题，可以发挥遗传算法和爬山法的不同优势，从而得到较满意的查询优化性能。     

梯度退火混合优化算法

通过对梯度法与模拟退火算法优缺点的分析,提出了一种梯度退火新型混合全局优化算法。该算法利用梯度法的快速寻优特性得到某一局部极值,然后采用模拟退火算法的全局搜索寻优能力跳出该局部极值,经过反复混合迭代最终获得全局最优解。仿真实验表明,该新型混合优化算法显著提高了求解全局优化问题的计算效率。     

复合图书馆:未来图书馆的发展方向

主要论述了复合图书馆的概念、特征及优点,并对其发展的前景做了展望。     

凸度量空间中非线性映象不动点迭代程序的稳定性

本文在凸度量空间中讨论非线性映象不动点迭代程序的稳定性,得到了一些新的稳定性定理,丰富和发展了引文[2]中的一些主要结果。     

浅析未来图书馆发展模式

本文简单论述了复合图书馆是未来图书馆发展的新模式，分析了复合图书馆的优越性并提出了发展复合图书馆的策略。