Signal averaging in gas chromatography

Ensemble or signal averaging, and the use of the technique for the solution of some unique problems with minimum sample handling, have previously been reported. The capability of the technique has been evaluated with microbore gas chromatography for the fast handling of a large number of analyses: ca 20–30 replicate injections are easily attainable in a reasonable analysis time. The implementation of the signal averaging technique with other concentration techniques for improving detection limits is also demonstrated.     

网络信息安全技术综述

阐述了网络信息安全的三个组成方面,具体分析了在实际应用中的网络安全技术手段,探讨了国内外研究开发网络信息安全技术的现状、发展趋势及我们所应着重采取的策略.     

AAL层抗信元丢失技术

ＡＴＭ网络中传输视频信号存在的信元丢失会严重影响接收图象的质量，可以从视频编解码端与ＡＴＭ适配层采取抗信元丢失技术以减少该影响。不同ＡＡＬ有不同的抗信元丢失原理。本文分别对用ＡＡＬ１，ＡＡＬ２，ＡＡＬ５适配ＭＰＥＧ－２视频信号时在ＡＡＬ层采取的抗信元丢失技术进行了分析。     

TV信号的多路传输及带宽压缩

本文阐述了时间压缩信号及其频谱、各种差分信号的产生方法及频带压缩过程.最后对图象带宽为4.2MHz的TV系统用8.4MHz带宽传送三个TV信号的具体执行力式作了介绍.     

The minimum squared euclidean distance of multi-h phase codes

The minimum squared Euclidean distance(MSED) of binary multi-h phase codes is presented. The signal segregation degree(SSD) has been put forward to determine MSED of multi-h phase codes. In order to maximize MSED, SSD should be as large as possible. The necessary and sufficient conditions of maximizing SSD are derived. Finally, SSD and the exact formulae for MSED of binary 2-h phase codes are also presented.     

GENERALIZED INVERSE GROUP OF SIGNAL AND ITS IMPLEMENTATION WITH NEURAL NETWORKS

A new concept, the generalized inverse group (GIG) of signal, is firstly proposed and its properties, leaking coefficients and implementation with neural networks are presented. Theoretical analysis and computational simulation have shown that (1) there is a group of finite length of generalized inverse signals for any given finite signal, which forms the GIG; (2) each inverse group has different leaking coefficients, thus different abnormal states; (3) each GIG can be implemented by a grouped and improved single-layer perceptron which appears with fast convergence. When used in deconvolution, the proposed GIG can form a new parallel finite length of filtering deconvolution method. On off-line processing, the computational time is reduced to O(N) from O(N2). And the less the leaking coefficient is, the more reliable the deconvolution will be.     

基于TMS320C5410EVM板的IIR数字滤波器的设计

本文研究DSP中的IIR数字滤波器的原理和用MATLAB在TMS320C5410EVM中设计IIR数字滤波器的过程和设计方法以及程序的调试方法。     

相关噪声中随机信号的Robust检测

本文重点讨论了在平稳ｍ相依噪声中弱随机信号的最佳无记忆Ｒｏｂｕｓｔ检测问题；并且以渐近功效函数为测度准则得到了最大最小无记忆非线性Ｒｏｂｕｓｔ检测器。     

一种异地库房管理中远程数据维护方法的研究与应用

介绍了在异地库房管理中，采用C／S结构和远程数据库访问技术等实现的对远程数据维护的一种方法。通过该方法开发的远程数据传输系统，实现了远程客户端对服务器的通信，完成了远程数据在后台服务器的集中管理和服务器对远程数据的格式、类型等的控制，同时保证了远程客户端对服务器操作的并发性，客户端数据和服务器数据的完整性、安全性以及远程客户端数据与后台服务器数据的一致性，有效地维护了远程数据。该系统已成功运用于库房管理之中。     

铁电存储器FM3808在TMS320VC5402系统中的应用

FM3808是Ramtron公司生产的新型超低功耗非易失铁电存储器，该器件可支持对存储区的高速读写，并可进行近乎无限次的写入。FM3808内部除具有256kB的存储阵列外还集成了实时时钟和系统监控模块，因而功能十分强大。文中介绍了FM3808的性能特点、内部结构和工作原理，分析了TMS320VC5402 DSP的并行引导装载模式。给出了DSP与FM3808组成的并行引导接口方案。