用灵敏电流计测量高电阻

介绍了用灵敏电阻计测量高电阻的方法。它依据欧姆定律原理，二级分压控制电源输出电压，用伏安法测高电阻，由灵敏电流计读出数据。实测结果被测电阻的标准误差小于０．０３ＭΩ，相对误差小于１％。     

Crosslinked chitosan doped with Y2(CO3)3 and surface energy and electrorheological properties

Novel electrorheological materials based on crosslinked chitosan doped with Y₂(CO₃)₃ were synthesized with biocompatible chitosan as the substrate of the materials. The electrorheological performance, surface energy, and thermal decomposition behavior of the materials were investigated as functions of the composition change. The results show that doping Y₂(CO₃)₃ can improve effectively the electrorheological performance of crosslinked chitosan with the formation of a metal–polymer complex when the doping degree is suitable. The surface energy plays an important role in influencing the electrorheological properties of the material. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

一种智能型单象限斩波器

本文提出一种智能型单象限斩波器以克服传统可控整流方式的不足。应用于直流传动的实验表明该斩波器对电网有良好的适应性，高功率因数，甚至在低速轻载条件下仍然具有良好的性能．     

声诱发反应的时变滤波处理

由听觉电生理与电子计算机技术的结合而诞生的电反应测听术,是听力学近十余年的一个重要发展,目前在耳科临床及生理学研究中已得到了广泛的应用。此类方法最大的缺点是速度慢:通常需要百次甚至千次的重复采样和叠加,才能得到一个反应的结果。对叠加效率的提高,不同作者提出了不同的方案,其中有所谓选择性叠加,互相关叠加,计权叠加,潜伏期校准叠加等等,而时变滤波(Time varying filtering)叠加则是较值得探索的技术之一[1—3] 通用的平均叠加仪器或设备都有按诱发电位类型而异的固定通带滤波选择,以期得到降低噪声、使信号清晰的效果。此种…     

VOD系统中一种机顶盒的解决方案

提出了一种 VOD系统中机顶盒的解决方案 ,包括硬件和软件结构 .硬件包括网络接口 NIU和机顶单元 STU,NIU为一特定的 ATM接口 ,STU为一通用的与网络无关的硬件平台 .在软件结构中 ,详细描述了系统网络协议和 DAVID系统软件 .     

Direct analytical methods for solving Poisson equations in computervision problems

Direct analytical methods are discussed for solving Poisson equations of the general form Δu=f on a rectangular domain. Some embedding techniques that may be useful when boundary conditions (obtained from stereo and occluding boundary) are defined on arbitrary contours are described. The suggested algorithms are computationally efficient owing to the use of fast orthogonal transforms. Applications to shape from shading, lightness and optical flow problems are also discussed. A proof for the existence and convergence of the flow estimates is given. Experiments using synthetic images indicate that results comparable to those using multigrid can be obtained in a very small number of iterations     

基于CB220的AT指令式GSM远程安全系统的设计与实现

分析了现有汽车报警器的缺点,详细阐述了基于CB220的GSM汽车报警器的系统设计,硬件设计和软件设计.发射部分采用GSM编码.该报警器利用可编程PLC器件CB220的性价比,使用支持GSM的专用通信模块,具有防盗拷能力佳、网络容量大、手机号码资源丰富、通话清晰、稳定性强不易受干扰、信息灵敏、通话死角少、手机耗电量低的优点.     

数字化管理与数字出版探索

浙江教育出版社建于1983年，始终以“服务教育．繁荣学术，积累文化”为宗旨．坚持改革精神，注重文化学术积累．努力完成国家重点出版项目．积极拓展对外版权贸易，坚持为教育事业服务．为广大读者特别是中小学师生服务．形成以教材建设为基础．以高品位的学术著作和有特点的中小学生课外读物及工具书为两翼的出版思路。从20世纪90年代起，浙江教育出版社步入了一条高速发展的轨道．     

Delay-Dependent Approaches to Globally Exponential Stability for Recurrent Neural Networks

This brief deals with the stability analysis problem for recurrent neural networks with delay. An improved stability condition is derived to guarantee the existence of the unique equilibrium point and its globally exponential stability, which is shown with novel methods. Both delay-dependent and delay-independent stability conditions are obtained. Expressed in terms of LMIs, they can be checked using the numerically efficient Matlab LMI toolbox. Examples are provided to demonstrate the effectiveness and the reduced conservatism of the analysis results.