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Proceedings of ICCS '94最新文献

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Correction of adaptor errors in reflection-coefficient measurements of waveguide devices 波导器件反射系数测量中适配器误差的校正
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474264
L. Qiao, S. Yeo
{"title":"Correction of adaptor errors in reflection-coefficient measurements of waveguide devices","authors":"L. Qiao, S. Yeo","doi":"10.1109/ICCS.1994.474264","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474264","url":null,"abstract":"The present paper describes a technique to remove the adaptor errors in reflection-coefficient measurements of waveguide-devices. It is simple to implement and experimental trials have shown that the corrected reflection-coefficient results are much more accurate than the raw readings (before the adaptor correction).<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129705785","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
Block of cells discarding for congestion control in ATM networks ATM网络中用于拥塞控制的单元块丢弃
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474194
H. Inai
{"title":"Block of cells discarding for congestion control in ATM networks","authors":"H. Inai","doi":"10.1109/ICCS.1994.474194","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474194","url":null,"abstract":"We propose a congestion control scheme for packet-oriented service in ATM networks. In most of the packet-oriented services, the higher protocol layers recover the corrupted or lost packets by retransmission. Under such an error recovery mechanism, when an intermediate node has discarded a cell, all the following cells associated with the same packet is not worth transmitting; because all the cells of the lost packet will be retransmitted. If the switching node removes those cells, the traffic beyond the congestion point must be reduced. We build a queueing model and investigate the performance characteristics of our congestion control scheme via simulation. As compared to the previously proposed congestion control scheme, our scheme provides a better performance.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130548448","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
Comparison of static and dynamic bandwidth allocation schemes for multiple QOS classes in ATM networks ATM网络中多个QOS类别的静态和动态带宽分配方案的比较
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474168
Jimmy H. S. Chan, D. Tsang
{"title":"Comparison of static and dynamic bandwidth allocation schemes for multiple QOS classes in ATM networks","authors":"Jimmy H. S. Chan, D. Tsang","doi":"10.1109/ICCS.1994.474168","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474168","url":null,"abstract":"In ATM networks, the bandwidth of the virtual paths (VPs) are allocated individually for the support of different traffic classes with different quality of service (QOS) requirements within a VP. A VP combination scheme defined by Chan and Tsang (see Proc. of ICCCN 94, San Francisco 11-14 Sept. 1994) is a way to assign traffic classes to different VPs for satisfying all the QOS requirements. It is also referred to as static bandwidth allocation schemes which may not have good utilization of network resources because of not sharing the bandwidth among the VPs. Another approach that makes use of some priority handling mechanism and allows the VP bandwidth to be shared among the VPs can satisfy the different QOS requirements while maintaining efficient network use. This scheme is referred to as dynamic bandwidth allocation schemes. Numerical results of the dynamic schemes are compared to that of the static schemes to evaluate their performance difference (i.e., the total capacity and the total buffer required).<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132049593","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: 8
Neural network approach to seismic signal analysis 地震信号分析的神经网络方法
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474072
Foo Say Wei, Lin Ming Yee
{"title":"Neural network approach to seismic signal analysis","authors":"Foo Say Wei, Lin Ming Yee","doi":"10.1109/ICCS.1994.474072","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474072","url":null,"abstract":"The paper summarises the preliminary findings of a neural network approach to automatic classification of moving objects based on seismic signals detected through a geophone. Four types of moving objects were considered: human beings, motorcycles, cars and buses. A 32-16-4 network structure was used and the data was preprocessed before neural analysis. The results reveal 92% accuracy in classifying human beings from vehicles. However, only 74% accuracy was achieved in classifying the four different types of moving objects.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130442640","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 improved DC- and Nyquist-free error control line code 一个改进的直流和奈奎斯特自由错误控制行代码
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474315
Jeong Goo Kim, S. Lee, E. Joo
{"title":"An improved DC- and Nyquist-free error control line code","authors":"Jeong Goo Kim, S. Lee, E. Joo","doi":"10.1109/ICCS.1994.474315","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474315","url":null,"abstract":"An improved DC- and Nyquist-free error control line code based on the (8,4) extended Hamming code is proposed and its performance is analyzed. To increase its code rate, two blocks of error control codes are used as a line code with simple pre-coding. The proposed code can be well suited for high speed communication links, where DC- and Nyquist-free pulse format, channel error control, and low-complexity encoder-decoder implementations are required. As results of performance analysis, the proposed code shows null points at DC and Nyquist frequency and low levels of complexity. In addition, the proposed code shows wider eyewidth due to its Nyquist-free property.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131309260","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 3-D segmentation-based coding for very low bit rate video transmission 一种用于极低比特率视频传输的基于三维分割的编码
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474108
Sang Mi Lee, Chieteuk Ahn
{"title":"A 3-D segmentation-based coding for very low bit rate video transmission","authors":"Sang Mi Lee, Chieteuk Ahn","doi":"10.1109/ICCS.1994.474108","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474108","url":null,"abstract":"A new 3-D segmentation-based coding technique is proposed, which can transmit a reasonable quality of video through very low bit rate channel. Also, its bit rate regulation is robust to intra frame coding such as scene changes and frame refreshments. Through the experiments, a visually acceptable video quality can be obtained at less than 64 kbps.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125440488","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
Communication network planning using artificial neural networks 利用人工神经网络进行通信网络规划
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474132
M. Ahmad
{"title":"Communication network planning using artificial neural networks","authors":"M. Ahmad","doi":"10.1109/ICCS.1994.474132","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474132","url":null,"abstract":"A strategic plan of a digital communication system for one of the most underdeveloped areas of the world is described in the paper. Communication network planning using the usual computer programs was not effective. A trainable system of artificial neural networks is shown to have advantages in this unusual situation. A neural network switch used for the dimensioning of trunks is shown to give an economical solution to this problem when compared with the estimate by various well known vendors.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126374299","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 error control scheme for multicast communications over an ATM network ATM网络上多播通信的错误控制方案
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474057
P. Godlewski, M. Braneci, A. Serhrouchni
{"title":"An error control scheme for multicast communications over an ATM network","authors":"P. Godlewski, M. Braneci, A. Serhrouchni","doi":"10.1109/ICCS.1994.474057","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474057","url":null,"abstract":"ATM-based transmission systems suffer from cell losses, caused particularly by congestion, which can seriously degrade the transmission quality. Forward error correction (FEC) techniques have been proposed for cell loss recovery but are still limited because congestion cell loss is hard to predict meaningfully. We propose a protocol based on an adaptive forward error correction (AFEC) mechanism. The protocol has been designed especially for minimizing the effect of transmission delays, and to fulfil the delay constraints of services to be provided. The proposed coding is examined for point-to-multipoint communications, and handles cells rather than messages to increase the efficiency.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121564585","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: 6
Numerical analysis of a grid array antenna 网格阵列天线的数值分析
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474173
H. Nakano, I. Oshima, H. Mimaki, J. Yamauchi, K. Hirose
{"title":"Numerical analysis of a grid array antenna","authors":"H. Nakano, I. Oshima, H. Mimaki, J. Yamauchi, K. Hirose","doi":"10.1109/ICCS.1994.474173","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474173","url":null,"abstract":"A grid array antenna printed on a dielectric substrate is analyzed using the method of moments. The impedance matrix element is separated into a singularity term and a perturbation term. To save computing time, an interpolation technique is applied to the perturbation term. Numerical results show that a traveling wave with some decay is dominant in the current distribution on the grid wire. Calculations based on the obtained current distribution reveal that the radiation beam direction moves toward the antenna plane, as the frequency decreases. The gain is found to be lower than that for a grid array antenna on an air substrate.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133227752","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: 20
Adaptive motion compensated vector quantizer for ATM video coding with cell loss compensation 基于小区损失补偿的ATM视频编码自适应运动补偿矢量量化器
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474107
Jian Feng, K. Lo, H. Mehrpour
{"title":"Adaptive motion compensated vector quantizer for ATM video coding with cell loss compensation","authors":"Jian Feng, K. Lo, H. Mehrpour","doi":"10.1109/ICCS.1994.474107","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474107","url":null,"abstract":"In this paper, a hue-layer adaptive motion compensated vector quantizer (AMCVQ) is proposed for ATM video coding. The proposed method classifies image blocks into three different motion classes. Low motion, medium motion and high motion. Only the motion compensated prediction (MCP) error of the medium-motion class and the pixel elements of the high-motion class are to be encoded by specific vector quantizers. Simulation results show that the proposed AMCVQ coder has better MSE performance than the MPEG DCT interframe coder. In addition, a simple compensation method is developed for handling the cell loss problem in ATM environment as well.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133448631","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
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