遥控数据编码方式分析与应用

分析了专用编码芯片NT66P20A的性能和通用编码、解码芯片PT2262和PT2272的作用以及智能芯片的编解码方法。介绍了常用无线遥控信息的两种收发方法和无线编码和解码的电路图,分析了多路智能温度遥控电路和编码程序设计方法。     

基于MATLAB的哈夫曼编码设计

利用哈夫曼压缩编码的原理及方法,采用MATLAB软件对两幅图片进行压缩编码程序设计,获得压缩信息及哈夫曼编码表,分析压缩后的图像像素数据及压缩比。结果表明,哈夫曼编码是一种无损压缩编码。     

浅析Internet区分服务中组播技术

本文主要研究Internet区分服务体系提供服务质量保证问题,分析了端到端服务质量体系结构、纽播技术,以及区分服务中存在着一些问题,以此,结合网络编码技术,本文提了基于网络编码的最大流单源组播路由算法。     

计算机中信息的表示

计算机内存储的信息包括数值数据和非数值数据两类,非数值数据主要包括文字、图片、声音等;在计算机中,各种信息都是以二进制编码的形式存在的,即都是以0和1组成的二进制代码表示的。本文讨论了各种非数值数据的表示形式。     

县域电子商务发展定位研究——以R县为例

运用扎根理论,通过编码方式分析R县域电子商务定位情况,分别从政府和企业的视角识别出县域电子商务定位的核心要素,建立一套系统的县域电子商务定位框架,为县域政府相关人员和企业提供关于电子商务发展的可靠建议。     

一种基于二进制编码的频繁项集查找算法

在数据挖掘中频繁项集的查找时间是影响挖掘关联规则效率的关键因素,Apriori算法是用来找出频繁项集的典型算法,本文针对Apriori算法需反复扫描数据库、产生大量候选项集的不足,提出一种效率更高的基于二进制编码的频繁项集查找算法,该算法找出频繁项集只需一次数据库扫描,不产生候选项集,与Apriori算法相比,算法效率更高.     

女大学生800 m跑量化配置组合教学试验研究

通过对1999级123名女大学生800 m跑三因素二水平的正交试验[L4(23)],揭示女大学生800 m跑教学练习的最佳科学量化配置组合;2000级102名女大学生在1999级正交试验的基础上,对所揭示的最佳配置组合又进行了验证试验,以论证其可靠性和实效性.     

Voices from the Ground Up: Transfer of Learning within the Context of Research and Study Activities

A mid-sized university library system conducted a large-scale mixed-methods research project intended to understand better the student library experience and ways to enhance it. One aspect of the project included a detailed and iterative analysis of interview data. Using a grounded theory (GT) approach, researchers analyzed empirical data from student interviews and identified patterns of behavior. The results of data analyses suggested that students used knowledge and interactions from library class to inform them of how to study academic content and complete non-research tasks and vice versa. As a result, researchers generated an inductive (emerging from the data) theory that asserts that some research and study activities are mutually informative. The article describes the approach used to develop the theoretical construct in hopes that it will provide a deeper understanding of the relationship between research and studying behaviors and how academic libraries contribute to the greater academic landscape in ways not previously recognized.     

Congestion control for ATM multiplexers using neural networks: multiple sources/single buffer scenario

A new neural network based method for solving the problem of congestion control arising at the user network interface (UNI) of ATM networks is proposed in this paper. Unlike the previous methods where the coding rate for all traffic sources as controller output signals is tuned in a body, the proposed method adjusts the coding rate for only a part of the traffic sources while the remainder sources send the cells in the previous coding rate in case of occurrence of congestion. The controller output signals include the source coding rate and the percentage of the sources that send cells at the corresponding coding rate. The control methods not only minimize the cell loss rate but also guarantee the quality of information (such as voice sources) fed into the multiplexer buffer. Simulations with 150 ADPCM voice sources fed into the multiplexer buffer showed that the proposed methods have advantage over the previous methods in the aspect of the performance indices such as cell loss rate (CLR) and voice quality.     

Video over IP using standard-compatible multiple description coding: an IETF proposal

INTRODUCTION Communication networks are growing quickly. Throughput, delays and losses become unpredictable because of heterogeneity and congestion. This results in lack of quality of service. Today’s solution is based on standard video codecs (as MPEG-2) that do not allow scalability and yield low quality at low bit-rates, complex forward error correction (FEC) codes that are not easily used with time-varying channels and must be set to face the worst case, and automatic repeat re- q…