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Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering最新文献

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Impact of single and double Rayleigh backscattering on available system gain in optically amplified fiber systems without isolators 无隔离器的光纤系统中单、双瑞利后向散射对系统增益的影响
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548081
P. Wan, J. Conradi
{"title":"Impact of single and double Rayleigh backscattering on available system gain in optically amplified fiber systems without isolators","authors":"P. Wan, J. Conradi","doi":"10.1109/CCECE.1996.548081","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548081","url":null,"abstract":"Rayleigh backscattering in optically amplified fiber systems without optical isolators is discussed, and its impact on these systems is quantified in terms of a receiver power penalty. We show that amplifiers with large gain should be avoided in these system. On the other hand, using moderate gain amplifiers, large system gains can be obtained with little power penalties.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128895234","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
Computational-RAM implementation of mean-average scalable vector quantization for real-time progressive image transmission 用于实时渐进图像传输的平均可扩展矢量量化的计算ram实现
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548131
T.M. Le, S. Panchanathan, M. Snelgrove
{"title":"Computational-RAM implementation of mean-average scalable vector quantization for real-time progressive image transmission","authors":"T.M. Le, S. Panchanathan, M. Snelgrove","doi":"10.1109/CCECE.1996.548131","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548131","url":null,"abstract":"A new progressive image transmission algorithm using vector quantization is proposed. The algorithm has been implemented on the parallel architecture of the computational-RAM. Simulation results have shown that good quality multi-resolution images can be reconstructed with no extra effort in the codebook generation, and real-time compression is possible with low computational complexity.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116966080","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: 5
Image compression with singularity preservation 基于奇异点保存的图像压缩
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548297
A. Langi, W. Kinsner
{"title":"Image compression with singularity preservation","authors":"A. Langi, W. Kinsner","doi":"10.1109/CCECE.1996.548297","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548297","url":null,"abstract":"This paper presents a new approach to lossy image compression through singularity preservation to obtain high compression ratios. The concept of this approach is based on a conjecture that image singularities carry most of the perceptual information, hence the essential part of an image should be represented by its singularity as opposed to its energy alone. Wavelet maxima have been chosen to represent signal singularity because of their ability to characterize image singularity fully. There are algorithms to reconstruct the original image faithfully from wavelet maxima. A compression scheme can then be designed to reduce the bit rate while preserving singularities. The resulting low bit-rate image has sharp edges without distortions, such as blockiness or blurs. This approach has been used to compress aerial ortho images, in which the perceptual quality of a 27 peak signal-to-noise ratio (PSNR) singularity-preserving image outperforms that of a 30 dB PSNR energy-preserving joint-photographic expert group (JPEG) image at a 15:1 compression ratio.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123473916","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
The response of observer based regulators designed by the separation principle 根据分离原理设计的基于观测器的调节器的响应
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548201
V. Polotski
{"title":"The response of observer based regulators designed by the separation principle","authors":"V. Polotski","doi":"10.1109/CCECE.1996.548201","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548201","url":null,"abstract":"Transition processes in the system incorporating an observer are analyzed. The symmetry of transition matrix with respect to the eigenvalues assigned for controller and observer is proved using state space methods. The interrelation with peaking phenomenon is discussed, and the asymptotic behavior of the system for the case of fast observer dynamics is investigated. Some illustrative examples and application to the tracking control of an autonomous vehicle are presented.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"4 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122080908","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
Reduction filters for minimizing data transfers in distributed query optimization 用于减少分布式查询优化中的数据传输的约简过滤器
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548071
J. Morrissey
{"title":"Reduction filters for minimizing data transfers in distributed query optimization","authors":"J. Morrissey","doi":"10.1109/CCECE.1996.548071","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548071","url":null,"abstract":"It has long been recognized that query optimization in distributed database systems is an important research issue. The challenge is to determine a sequence of operations which will process the query while minimizing the chosen cost function. Finding the optimal optimization for a general query is an NP-hard problem so, in general, heuristics are employed to find a cost-effective and efficient processing method. We present a novel approach to the problem, which uses reduction filters, with the objective of minimizing the total volume of data transferred in the network. We assume a distributed relational database management system and select-project-join queries. This means that we have a number of relations, each located at a different site in the network, which must be joined and the result made available at some distinct query site. Our technique is to reduce the relations, before shipment to the query site, using reduction filters and thereby significantly reduce the total communication cost.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116848934","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: 9
Technology transfers: strategies for entering the twenty-first century 技术转让:进入二十一世纪的战略
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548303
J.T. Imai
{"title":"Technology transfers: strategies for entering the twenty-first century","authors":"J.T. Imai","doi":"10.1109/CCECE.1996.548303","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548303","url":null,"abstract":"Technology and technology based industries are becoming the economic backbone which drives the economy. As a result, technology is increasingly becoming a saleable commodity for transfer and export. The purpose of this paper is to highlight some of the forms that a technology transfer can take and the pitfalls to avoid when negotiating a technology transfer agreement.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128448682","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 multi-carrier CDMA system using a concatenated orthogonal/PN spreading scheme 一种采用串联正交/PN扩展方案的多载波CDMA系统
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548072
Won-Sik Youn, L. Freiberg, V. Bhargava
{"title":"A multi-carrier CDMA system using a concatenated orthogonal/PN spreading scheme","authors":"Won-Sik Youn, L. Freiberg, V. Bhargava","doi":"10.1109/CCECE.1996.548072","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548072","url":null,"abstract":"Direct sequence code division multiple access (DS-CDMA) is currently of great interest for mobile communications applications. It provides reasonable privacy and security, and good immunity to interference and fading. We propose a new communication scheme combining both multi-carrier (MC) modulation and DS-CDMA with a concatenated orthogonal/pseudo-noise (PN) spreading scheme. This scheme incorporates the advantages of both DS-CDMA with a concatenated scheme, and an MC modulation technique to combat the effect of a multipath fading channel. The system performance is investigated for a single correlator and a maximal ratio combiner. The performance analysis is carried out under a multiuser and multipath Rayleigh/Rician fading environment. It is shown that the proposed system outperforms the MC-CDMA system with a conventional PN sequence.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128175548","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
An approach to quality of service control in telecommunication networks 电信网络服务质量控制的一种方法
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548314
A. Rueda
{"title":"An approach to quality of service control in telecommunication networks","authors":"A. Rueda","doi":"10.1109/CCECE.1996.548314","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548314","url":null,"abstract":"This paper presents a simple approach to quality of service control in telecommunication networks. A new model is proposed which is analyzed using concepts from perturbation theory. It is shown that under certain assumptions the model is exponentially stable. The application of optimal control to the proposed model is outlined.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128235820","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
LAM: another Prolog abstract machine LAM:另一个Prolog抽象机器
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548099
X. Li, Y. Yao
{"title":"LAM: another Prolog abstract machine","authors":"X. Li, Y. Yao","doi":"10.1109/CCECE.1996.548099","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548099","url":null,"abstract":"The Warren Abstract Machine has been accepted as the de facto standard for implementing Prolog for more than ten years. The WAM adopts structure copying to represent Prolog terms. It flattens nested structures and expands them into efficient WAM instructions which either copy terms into the heap or unify terms along the heap pointer. When two terms to be unified are structure instances in the heap, the WAM must invoke a built-in procedure to carry out the stack based full unification. We propose a new Prolog execution model-the Lakehead Abstract Machine. The LAM is designed to retain the control features of the WAM, but the structure copying is replaced by program sharing for implementing unification. The idea of program sharing is originated from the structure sharing used in the DEC-10 Prolog. The significant difference, however, is that the shared resources are no longer structure prototypes, but executable LAM code. With the LAM, nested structures are flattened and then translated into a set of subprograms. In constructing a structure, the LAM only puts its corresponding subprogram pointer into the heap. When two terms to be unified are structures, their bound subprograms will be invoked. We have implemented an experimental LAM emulator in C. Benchmarks show that the LAM based Prolog implementation is quite competitive with the WAM based systems, such as SICStus and BIN-Prolog.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128296489","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
Integration of GCAC and SPF for connection management in ATM networks 集成GCAC和SPF的ATM网络连接管理
Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering Pub Date : 1996-05-26 DOI: 10.1109/CCECE.1996.548280
Jianli Wang, H. Mouftah
{"title":"Integration of GCAC and SPF for connection management in ATM networks","authors":"Jianli Wang, H. Mouftah","doi":"10.1109/CCECE.1996.548280","DOIUrl":"https://doi.org/10.1109/CCECE.1996.548280","url":null,"abstract":"GCAC (generic call admission control) has been adopted by the ATM Forum in its PNNI specification to reduce call setup delay. In the current version of PNNI specification, GCAC is separated from the route computation. All links within the network must be checked against GCAC even if they are not involved in the route computation. To further reduce call setup delay, a new mechanism, the integrated path selection (IPS), is proposed in this paper. In the IPS mechanism, only the links involved in the route computation need to be checked against GCAC. Analysis shows that by using IPS, the number of link checks can be reduced by 30% on the average.","PeriodicalId":269440,"journal":{"name":"Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129830941","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
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