用富集培养技术分离具有PAL活性的酵母菌

为获取具有ＰＡＬ活性的菌株，设计了从天然源分离酵母菌的定集培养技术，并从中国西南地区采集２０个样品中得到菌株１４０余株，结果表明本富集培养技术用于从天然源分离具有苯丙氨酸解氨酶活性的菌株是有效、可行的。     

影响冷弯型槽钢临界弯曲角因素综合分析

计算、分析了带材弹性模量，槽钢腿部长度，腰部宽度，厚度，强度极限和弹性极限对冷弯型槽钢临界弯曲角的影响，其结果对提高产品质量，降低生产成本有参考价值。     

薄壁黄铜天线套管成型的试验研究

介绍了开发研制薄壁黄铜小直径天线套管的拉伸工艺及理论，并对拉伸断裂的塑性变形理论进行了分析探讨，进而对游动芯头拉伸与应用，提出工艺改进和提高管材表面质量的措施。     

65Mn冷切锯片齿部电接触淬火的研究

试验研究了６５Ｍｎ钢制冷切锯片齿部重新电接触加热淬火工艺参数，齿部显微组织，硬化层深度，硬度及耐磨性，并进行了电接触淬火锯片实际寿命考核以及经济效益分析。     

一种求解W(s)=0的有效算法

复变函数的幅角原理[1]给出了方程W（s）=0的根存在的充分和必要条件，但如何有效地确定这些根，还需要进一步探索。本文给出一种在复域解决这一问题的数值方法─—正交搜索法。该方法利用解析函数保角映射的特性，通过沿复变量s的实部和虚部交替搜索，逐步逼近和达到所求方程的根．该方法不需计算任何导数，直观、简便，且能在计算机上自动完成。应用该方法解决某工程问题，获得了满意的结果．     

计算机会议流控制通道协议研究

目前同步计算机会议系统控制方面的能力有限，本文提出了一种会议控制协议，基于开放分布式处理参考模型控制通道概论，在分析协议需求的基础上，设计了一种组合域名协议原语，并用于协议的形式化描述，同时采用带时间和控制的有色Ｐｅｔｒｉ网描述了控制协议实体以进行协议的验证。文章最后简述该协议的设计和实现。     

基于应用网关的防火墙安全系统的设计与实现

文中给出了一和中基于应用网关的防火墙安全系统的设计与实现的方法。重点介绍了系统安全策略以及所采用的分组滤波，基于ＩＰ层的 密这两种主要技术。     

Chain Vibration and Dynamic Stress in Three-Dimensional Multibody Tracked Vehicles

A three-dimensional computational finite element procedure for the vibration and dynamic stress analysis of the track link chains of off-road vehicles is presented in this paper. The numerical procedure developed in this investigation integrates classical constrained multibody dynamics methods with finite element capabilities. The nonlinear equations of motion of the three-dimensional tracked vehicle model in which the track link s are considered flexible bodies, are obtained using the floating frame of reference formulation. Three-dimensional contact force models are used to describe the interaction of the track chain links with the vehicle components and the ground. The dynamic equations of motion are first presented in terms of a coupled set of reference and elastic coordinates of the track links. Assuming that the structural flexibility of the track links does not have a significant effect on their overall rigid body motion as well as the vehicle dynamics, a partially linearized set of differential equations of motion of the track links is obtained. The equations associated with the rigid body motion are used to predict the generalized contact, inertia, and constraint forces associated with the deformation degrees of freedom of the track links. These forces are introduced to the track link flexibility equations which are used to calculate the deformations of the links resulting from the vehicle motion. A detailed three-dimensional finite element model of the track link is developed and utilized to predict the natural frequencies and mode shapes. The terms that represent the rigid body inertia, centrifugal and Coriolis forces in the equations of motion associated with the elastic coordinates of the track link are described in detail. A computational procedure for determining the generalized constraint forces associated with the elastic coordinates of the deformable chain links is presented. The finite element model is then used to determine the deformations of the track links resulting from the contact, inertia, and constraint forces. The results of the dynamic stress analysis of the track links are presented and the differences between these results and the results obtained by using the static stress analysis are demonstrated.     

多媒体视频会议系统的关键技术研究

多媒体视频会议系统是近年来国际上将“视频图像、语音等多媒体信息数字处理”与“数字通信传输技术”最新成果相结合的产物，它集计算机的交互性、通信的分布性以及电视的真实性为一体，具有明显的优越性，因而成为当今计算机领域的一个研究热点。本文主要讨论了该系统的组成、原理及关键技术，尤其是图像压缩技术的研究。     

群件技术在质量管理中的应用研究

本文介绍了一些典型的群件技术和一个以取得ＩＳＯ９０００质量认证为目的的质量管理方法，对群件技术和质量管理过程两者的结合作了探讨，并以两个流行的群件软件ＬｏｔｕｓＮｏｔｅｓ和ＭｉｃｒＯｓｏｆｔＮｅｔＭｅｅｔｉｎｇ为例说明了群件技术在质量管理过程的作用。