电话会议系统中电话事件状态及状态转移设计

以一个电话会议汇接系统的设计开发为例，针对电话会议汇接系统的实时性、多任务的特点，运用有限状态机模型，从状态和状态转移的设计入手，结合面向对象程序语言编程，探讨此类系统的软件设计的思路和方法。     

基于TDI的网络安全存储系统研究与实现

提出了传输层网络安全存储系统的体系结构和实现方法 ,将用户管理、访问控制、数据加密和审计日志等安全措施集中到普通网络存储系统中 ,并重点对系统中基于TDI的过滤驱动程序原理和实现进行了分析 .该系统为提高目前网络存储系统的安全性提供了一种方便安全、管理集中、高效可靠的解决方案     

Efficient expression of human factor Ⅸ cDNA in liver mediated by hydrodynamics-based plasmid administration

The transfection of plasmid DNA into mammalian cells is an indispensable tool in the study of gene transfer and gene function. Since the original report in 1990 on the successful expression of a reporter gene in muscle[1], plasmid DNA injection has been widely used to mediate gene transfer study. As a gene transfer vector, naked DNA has many obvious advantages. It is easy and cheap to be prepared and more safe after transfection. But the plasmid mediated gene expression is low because of t…     

Parallel Mechanisms with Two or Three Degrees of Freedom

Parallel manipulators for the machine tool industry have been studied extensively for various industrial applications. However, limited useful workspace areas, the poor mobility, and design difficulties of more complex parallel manipulators have led to more interest in parallel manipulators with less than six degrees of freedom (DoFs). Several parallel mechanisms with various numbers and types of degrees of freedom are described in this paper, which can be used in parallel kinematics machines, motion simulators, and industrial robots.     

解决图像监控系统中图像传输质量的关键

在图像监控系统中，图像的传输是一个关键问题．图像在传输过程中容易出现延时、抖动、失真等现象．在较全面地分析图像传输中的压缩标准、传输协议、传输方式，以及传输软件设计等一些关键技术的基础上，提出了提高图像传输质量的有效方法．     

Novel Hyper-Redundant Manipulator-. Design, Study and Experiment

A novel hyper-redundant manipulator named RT1 is designed and studied. The unique feature of RT1 is all degrees of freedom (DOF) are actuated with only one motor via special designed hinge bar universal joints. The mechanisms of RT1 are introduced in detail. Some experiments are carried out in order to test the movability and adaptability of the manipulator. RT1 is actuated by pulse string and acts discretely. The discrete working space of RT1 is described and the parameter optimization for kinematical redundancy resolution is studied also. The optimization criterion is altering the design parameter as little as possible during manipulator's motion from the initial position to the expected position. An optimization example is given that is realized with Matlab optimize tool-box.     

Recent progress in polymer-based gene delivery vectors

The gene delivery system is one of the three components of a gene medicine, which is the bottle neck of current gene therapy. Nonviral vectors offer advantages over the viral system of safety, ease of manufacturing, etc. As important nonviral vectors, polymer gene delivery systems have gained increasing attention and have begun to show increasing promising. In this review, the fundamental and recent progress of polymer-based gene delivery vectors is reviewed.     

利用多径环境中的电场极化提高无线传输速率

论述了多径环境中无线信号传播的特殊极化方式，并通过仿真计算与理论分析说明了利用多径环境中的多种电场极化状态提高无线传输速率的可能性，提出了相应的实现方案。根据实测数据计算对比了采用不同极化状态时的传输速率，结果显示了这一技术对于充分利用无线频率资源的巨大潜力。     

乳状液膜法提取废水中柠檬酸传质模型的研究

在探讨乳状液膜法提取废水中柠檬酸的基础上，建立了恒界面状况下的非稳态平板传质模型，经过合理假设，推导出易于求解的拟稳态平板传质模型；利用恒界面条件下的实验数据，拟合了拟稳态平板传质模型。     

1,3-苯二氧基二乙酸二芳酯的合成及植物生长调节活性

以PEG 4 0 0为催化剂 ,在液 液相转移催化条件下合成了一系列新的 1,3 苯二氧基二乙酸二芳酯 .用元素分析、IR以及1 HNMR确定了它们的结构 .初步生物活性试验表明 ,该类化合物对小麦幼苗的生长有一定的促进作用 .