微电机与微加工

简述了和微电机相关的微加工生产中的方法，介绍了微型机电部件成型的实现途径。     

ANN valuation model of material LCIA profile

Weighting model is the only valuation model of life cycle impact assessment(LCIA) profile now. It simplifies evaluation function into linear function, and makes the determination of weighting factor complicated. Therefore the valuation of LCIA profile is the most critical and controversial step in life cycle assessment(LCA). Development on valuation models, which are understood easily and accepted widely, is urgently needed in the field of LCA.The modeling approaches for the linear evaluation function were summed up. The modeling approaches for the nonlinear evaluation function were set up by function approximation theory, which include choosing preference products, forming preference data, establishing artificial neural network(ANN) and training ANN by preference data.By selecting 7 material products as preference product, experience was done with modeling approaches of the nonlinear evaluation function. The results show that the modeling approaches and valuation model of the nonlinear evaluation function are more practical than the weighting model.     

金刚石薄锯片切割石材中力和功率变化过程研究

文章研究金刚石薄锯片切割花岗岩过程中的力和功率变化特征.通过测量主轴功率、垂直与水平锯切力,分析了功率和锯切力随锯切面积的变化,计算了单颗磨粒法向力.并就金刚石薄锯片的耐磨性与常规锯片进行了比较.结果表明,功率和锯切力的变化与常规锯片切割相似,并未出现异常振动.单颗磨粒承受载荷与常规锯片切割也无显著增加.     

Three-dimensional combined finite-discrete element approach for simulation of single layer powder Compaction process

The application of a combined finite-discrete element modeling approach to simulate the three-dimensional microscopic compaction behavior of single-layer metal powder system was described. The process was treated as a static problem, with kinematical component being neglected. Due to ill condition, Cholesky‘s method failed to solve the system equations, while conjugate gradient method was tried and yielded good results. Deformation of the particles was examined and compared with the results of physical modeling experiments. In both cases, the inner particles were deformed from sphere to polygonal column, with the edges turning from arc to straight line. The edge number of a particle was equal to the number of particles surrounding it. And the experiments show that the ductile metal particles can be densified only by their plastic deformation without the occurrence of rearrangement phenomenon.     

有色合金连续铸造设备的发展状况

主要从设备类型、结晶器和控制系统三方面介绍了有色合金连续铸造设备的发展状况,同时简单介绍了复合材料连续铸造设备的开发情况,最后提出了有色合金连续铸造设备的发展方向.     

白腐菌去除造纸废水中木质素的机理及研究进展

阐述了白腐菌对造纸废水中木质素去除的应用现状及研究进展,并对白腐菌产生的木素过氧化物酶、锰过氧化物酶、漆酶对木质素的降解机理进行了分析和探讨。     

多媒体MP3音乐网上点播系统的设计与实现

文章介绍了基于B／S模式开发Web数据库管理系统的实现原理和技术，提出了多媒体MP3音乐网上点播系统的设计思想，并使用PHP MySql技术实现该系统的主要功能。     

教学网络的安全性研究

针对实验室教学网络的安全性需求进行了详细的分析，提出了解决其安全性问题的具体实现方法，并在实验教学过程中予以应用，取得了很好的效果。     

基于C51的氨含量监测系统软件设计

本文提出了使用C51高级语言将浮点数转换为BCD码的算法和实现过程。提出对具有指数特性的电化学传感器的快速校正算法。详细论述了存储、查询和打印函数的设计思想。     

电力电缆接头温度远程在线监测网络系统

论述了系统的拓扑结构、功能和应用场合。阐述了主机和从机之间的通信机理并自定制了双方的通信协议。提出了主机获取数据及其对数据的处理方法。设计了数据库的管理、查询、统计、报表生成和打印等子系统。论述了从机的硬件组成以及各模块功能 ,从机主程序和通信中断服务程序的功能及实现思想