发布求助
文献互助 智能选刊 最新文献

IEEE AFRICON. 6th Africon Conference in Africa,最新文献

筛选
英文 中文
Higher order adaptive arithmetic coding using the prediction by partial match algorithm 采用部分匹配预测算法的高阶自适应算术编码
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1146829
K. Soyjaudah, I. Jahmeerbacus, M. Oolun, C. Bhurtun
{"title":"Higher order adaptive arithmetic coding using the prediction by partial match algorithm","authors":"K. Soyjaudah, I. Jahmeerbacus, M. Oolun, C. Bhurtun","doi":"10.1109/AFRCON.2002.1146829","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1146829","url":null,"abstract":"Arithmetic coding completely bypasses the traditional coding paradigm that replaces an input symbol by a specific code. Arithmetic coding represents a stream of input symbols by a single codeword. The modelling paradigm is a key aspect in effective data compression. We present an adaptive higher order arithmetic coding scheme using the prediction by partial match (PPM) algorithm as well as a framework for the comparison of the different compression techniques. Simulation study conducted with this framework shows that compressive effectiveness and implementing complexity increases as the order increases but above a certain order there is no gain in compression with increasing costs.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126715963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Optical buffering and switching in packet switched optical networks 分组交换光网络中的光缓冲与交换
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1146844
R. Geldenhuys, F. Leuschner
{"title":"Optical buffering and switching in packet switched optical networks","authors":"R. Geldenhuys, F. Leuschner","doi":"10.1109/AFRCON.2002.1146844","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1146844","url":null,"abstract":"Optical packet switching provides the advantages of transparency and the efficient use of the bandwidth provided by WDM on optical transport networks. There are however various impediments to deploying this technology in an all-optical fashion: optical buffering is inefficient, and all-optical signal processing has not been implemented in networks. It is possible to utilise optical signal processing for all-optical header processing and all-optical switching, and proof of concept experiments have been done to verify this.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114602614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An operations research approach to the electrical transmission network demand forecasting 输电网需求预测的运筹学方法
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1160033
D. Payne, J. Pretorius, P. D. Pretorius
{"title":"An operations research approach to the electrical transmission network demand forecasting","authors":"D. Payne, J. Pretorius, P. D. Pretorius","doi":"10.1109/AFRCON.2002.1160033","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1160033","url":null,"abstract":"This paper considers the relevance of operations research to electrical transmission network demand forecasting. It provides a solution on how to structure the transmission networks so that a number of expert views in the South African electrical industry can be modelled mathematically and then uses those outputs for network load flow studies. The outputs (point loads) should include all future demand growth trends so that the electrical networks can be expanded in the most cost-effective manner.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114764696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
AC transmission line corona noise issues in a small corona cage 小型电晕笼中交流传输线电晕噪声问题
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1159985
R. Urban, H. Reader, J. Holtzhausen
{"title":"AC transmission line corona noise issues in a small corona cage","authors":"R. Urban, H. Reader, J. Holtzhausen","doi":"10.1109/AFRCON.2002.1159985","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1159985","url":null,"abstract":"The corona performance of AC transmission line designs must be determined since conducted corona. noise affects power line carrier communication used for teleprotection on the line. Such studies have been performed in large corona cages in a narrow frequency band. Issues related to wideband studies in a small corona. cage are examined in this paper.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116610227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Digital reference generation for a series active filter integrated with a diode rectifier 与二极管整流器集成的串联有源滤波器的数字基准生成
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1160011
A. le Roux, H. Mouton, H. Akagi
{"title":"Digital reference generation for a series active filter integrated with a diode rectifier","authors":"A. le Roux, H. Mouton, H. Akagi","doi":"10.1109/AFRCON.2002.1160011","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1160011","url":null,"abstract":"This paper considers the control of a series active filter integrated with a double-series diode rectifier. It is shown that, as result of delays introduced by digital control, current-mode control is preferred to voltage-mode control for digital implementations. A Fourier-based method for generating balanced current references with optimized power factor is presented. The advantage of current-mode control is illustrated by simulation and the Fourier-based method is verified by experiment.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116967077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A broadband microwave amplifier design by means of immittance based data modelling tool 利用基于阻抗的数据建模工具设计宽带微波放大器
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1159965
A. Kilinc, H. Pinarbas, M. Sengul, B. Yarman
{"title":"A broadband microwave amplifier design by means of immittance based data modelling tool","authors":"A. Kilinc, H. Pinarbas, M. Sengul, B. Yarman","doi":"10.1109/AFRCON.2002.1159965","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1159965","url":null,"abstract":"In this paper a practical broadband microwave amplifier design algorithm is introduced utilizing the immittance data-modelling tool. In the course of design, first, the optimum input and output terminations for the active device are produced employing the real frequency technique. Then, these terminations are modelled utilizing the new immittance-modelling tool to synthesize the front-end and back-end matching networks. An example is included to exhibit the implementation of the proposed design algorithm to construct a single stage BJT amplifier over a wide frequency band. It is expected that the proposed design algorithm will rind applications to realize wideband microwave amplifiers put on MMIC for mobile communication.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123338771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The effect of thermal characteristics of power line insulators on pollution performance 电力线绝缘子热特性对污染性能的影响
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1159979
W. Vosloo, J. Holtzhausen, Eskom
{"title":"The effect of thermal characteristics of power line insulators on pollution performance","authors":"W. Vosloo, J. Holtzhausen, Eskom","doi":"10.1109/AFRCON.2002.1159979","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1159979","url":null,"abstract":"Power line insulators are heated by the sun and cool down during the night. The heating and cooling characteristics depend on the insulator material. The wetting of polluted insulators depends on various factors, such as humidity, ambient temperature and the temperature of the insulator surface. In this paper this phenomenon is investigated in the laboratory and on site for insulators made of various materials.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123734553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Development of an electrochemical sensor array for determination of food analytes 用于食品分析物测定的电化学传感器阵列的研制
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1146871
S. Jawaheer, H. Rughooputh, S. White, D. Cullen
{"title":"Development of an electrochemical sensor array for determination of food analytes","authors":"S. Jawaheer, H. Rughooputh, S. White, D. Cullen","doi":"10.1109/AFRCON.2002.1146871","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1146871","url":null,"abstract":"With modern techniques of sensor fabrication and the processing power of modern microelectronic, sensors can be conferred a degree of miniaturisation and integrated into a small portable devices to allow in situ real-time monitoring. We report here the development of a multi-analyte electrochemical sensor array tailored to monitor the quality of fruits of economical importance to tropical countries. The array sensor has the ability to simultaneously monitor a range of food quality indicator analytes offering a robust analytical output. For this work, one-shot array sensors were mass fabricated using screen-printing (thick film) technology.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"50 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122731442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A micro-controller based intelligent controller for a composting plant 一种基于微控制器的堆肥厂智能控制器
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1146814
M. Oolun, M. I. Jahmeerbacus, K. Soyjaudah, C. Bhurtun
{"title":"A micro-controller based intelligent controller for a composting plant","authors":"M. Oolun, M. I. Jahmeerbacus, K. Soyjaudah, C. Bhurtun","doi":"10.1109/AFRCON.2002.1146814","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1146814","url":null,"abstract":"The paper presents the design of an intelligent controller for a composting plant, based on a micro-controller platform. This system enables the composting process to take place under the optimum conditions so as to reach maturity in an optimum time. It is designed around a PIC16C71 micro-controller chip, and comprises some simple hardware components and low-level target embedded firmware. Hence, a very compact, fast, flexible, and more importantly cost-effective solution is achieved for the control of the two important parameters, notably temperature and air-flow, of interest in the composting process. Results of tests show that this system provides significantly good levels of autonomous control, and can be easily upgraded into a network controlled system.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"23 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123557056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Application of extended Huygens' principle to scattering discontinuities in waveguide 扩展惠更斯原理在波导散射不连续中的应用
IEEE AFRICON. 6th Africon Conference in Africa, Pub Date : 2002-10-02 DOI: 10.1109/AFRCON.2002.1159969
Geschke Rh, R. L. Ferrari, David B. Davidson, Petrie Meyer
{"title":"Application of extended Huygens' principle to scattering discontinuities in waveguide","authors":"Geschke Rh, R. L. Ferrari, David B. Davidson, Petrie Meyer","doi":"10.1109/AFRCON.2002.1159969","DOIUrl":"https://doi.org/10.1109/AFRCON.2002.1159969","url":null,"abstract":"A recently proposed extended Huygens' principle for scattering objects in a waveguide is reviewed. This technique allows the coupling of a finite element discretisation with a quasi method of moments (MM) surface element approach. Perfectly conducting posts are considered as test cases. Implementational details are discussed and results for the conducting post are presented.","PeriodicalId":185871,"journal":{"name":"IEEE AFRICON. 6th Africon Conference in Africa,","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128594101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书