IPv4与IPv6的比较

通过对目前使用的网络通信协议1Pv4存在的实际问题的讨论，引入对新一代网络通信协议IPv6的新特性及其应用前景的介绍。     

Windows9X下多线程的同步及其实现

简要地分析了Windows9X环境下多线程的同步的概念，然后重点介绍了如何利用Delphi5．0提供的标准多线程类(Thread)来实现windows9X环境下多线程的同步。     

构建高等职业院校全程化就业指导体系的思考

以就业为导向，构建高职院校全程化就业指导体系是当前教育改革和社会发展的必然要求。作者从全体教师参与就业指导工作、以就业为导向的高等职业教育课程体系的设计和实施，注重职业生涯规划指导、破“短期促销式”的高职教育就业指导服务工作现状；作好毕业生跟踪调查和回访等五个方面探讨了构建全程化就业指导体系的思路。     

Effect of Mixed Solvents and Additives on the Habit Modification of 6-APA Crystals

6-aminopenicillanic acid (6-APA) crystals obtained under different physical and chemical conditions of the solutions may present different habits. The habits of diamond-shaped plates are desirable compared with other habits of 6-APA crystals. To obtain ideal 6-APA crystals, the effects of the mixed solvents and additives on 6-APA crystal habits were investigated. Ethanol or acetone was used as the organic solvent, and impurities existing in the ,6-APA purification process were used as the additives. 6-APA growth habits were changed when the concentrations of ethanol, acetone or phenyl acetic acid were increased to exceed their critical concentration. The observed results show that the dominant face on 6-APA crystals was identified to be , {020}, but the overall habit was controlled by the relative growth rates of the : 101 and {002} faces. Crystal growth rates and habits can be appreciably changed by specific adsorption of additives on crystal faces. In some cases solvent molecules can act in a similar way and may be regarded as bulk additives. The effects of additives and organic solvents on 6-APA crystal habits were the results of adsorption effect,which fitted the experimental results quite well.     

钢琴四、五度与三、六度调律法

钢琴调律，精确度是不容忽视的问题。目前，调律师普遍采用的是四、五度调律法。但这种调律法的整个过程彼此依赖，形成一个闭合环，二旦某个步骤出现误差，将会带入下一环节，而三、六度调律法可减少人为误差，有助于提高调律的速度及精确度。     

L-fuzzy相对T-1,相对T0与相对次T0分离性

定义了L-fuzzy拓扑空间中的相对T-1，相对T0与相对次T0分离性，讨论了相对T-1，相对T0与相对次T0分离性的一系列性质．证明了相对T-1，相对T0与相对次T0分离性是遗传的、传递的、弱同胚不变的及可乘性等性质，并给出了一些例子。     

基于PROFIBUS现场总线的装配生产线的设计与实现

介绍了PROFIBUS现场总线在多站点装配生产线上的应用,根据各站点工艺上的要求,主站选用了SIEMENS的S7-300、从站选用了S7-200PLC,采用W INCC监控软件构成了一个多用途的控制网络,可实现逻辑控制、模拟量控制、运动控制等.     

洗衣机时序控制器及线束检测系统

文章中讨论了采用微机系统设计实现的洗衣机时序控制器及线束检测系统,给出了该系统的硬件和软件设计方案.     

6RA70在直流传动系统中的应用

介绍SIMOREG 6RA70的特点,对系统各主要模块的功能进行了论述,介绍了它的工作原理,系统具有安全、可靠等特点。