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IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings最新文献

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Multiresolution 2-dimensional edge analysis using wavelets 基于小波的多分辨率二维边缘分析
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270519
K. Takaya, G. Sarty, X. Li
{"title":"Multiresolution 2-dimensional edge analysis using wavelets","authors":"K. Takaya, G. Sarty, X. Li","doi":"10.1109/WESCAN.1993.270519","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270519","url":null,"abstract":"The authors show that wavelet transforms can be used in an empirical way to improve edge-detected pictures. Specifically, the first derivative of a Gaussian distribution function is used as the wavelet for detecting edges. The wavelet transforms are calculated using integer scales instead of dyadic scales. This empirical approach is justified by comparing the method with an exact reconstruction process that uses wavelet transforms of the original image. The approach was demonstrated in an experiment that used a magnetic resonance image of a brain.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131499401","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: 10
Adequacy evaluation in generation, transmission and distribution systems of an electric power system 电力系统的发电、输电和配电系统的充分性评估
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270563
R. Billinton, J. Satish
{"title":"Adequacy evaluation in generation, transmission and distribution systems of an electric power system","authors":"R. Billinton, J. Satish","doi":"10.1109/WESCAN.1993.270563","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270563","url":null,"abstract":"Reliability analysis is not usually conducted on a complete power system, and reliability evaluations of generating facilities, transmission systems, and of distribution system segments are usually conducted independently. The reliability indices obtained for each segment are then used to make decisions. A more realistic procedure involves categorizing the generating, transmission and distribution zones into hierarchical levels and performing reliability analysis of these levels. The authors illustrate the reliability indices which can be obtained at these hierarchical levels. The analysis considers element outages in all parts of an electric power system to provide a comprehensive appraisal of the overall system. The concepts involved in the reliability evaluation of a complete power network are presented using an educational test system developed at the University of Saskatchewan.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132319961","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
ATM framing acquisition ATM帧采集
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270554
D. Dodds, Lejin Du
{"title":"ATM framing acquisition","authors":"D. Dodds, Lejin Du","doi":"10.1109/WESCAN.1993.270554","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270554","url":null,"abstract":"There are two kinds of framing strategies in asynchronous transfer mode (ATM) networks: special word framing (SWF) and cell delineation framing (CDF). A simple design for the realization of cell delineation framing is proposed. In contrast to SWF which may include many cells to a frame, the CDF technique has only one cell per frame. Both framing methods detect the frame boundary using correlation. The SWF method directly compares the incoming data with a known special word. In contrast, the proposed CDF technique uses a sliding window cycle redundancy check (CRC) for the previous 40 b to produce an 8-b syndrome byte. This syndrome byte will be zero in all bit positions when a 5-byte cell header is positional within the 40-b window. The authors describe the concept and framing acquisitions model for CDF, and give a practical framing receiver design. The mathematical analysis and the synchronization performance are considered.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130012353","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 fuzzy seeding depth monitoring and control system 一种模糊播种深度监测控制系统
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270587
W. Kinsner, G. Gamby, R. Froese, T. Tessier
{"title":"A fuzzy seeding depth monitoring and control system","authors":"W. Kinsner, G. Gamby, R. Froese, T. Tessier","doi":"10.1109/WESCAN.1993.270587","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270587","url":null,"abstract":"Depth of seeding is an important factor affecting seedling vigor and crop yield. The authors propose a fuzzy-logic seeding depth controller which combines an accurate measurement and data collection technique with a human decision process to provide optimum depth control, with minimal human operator involvement. The system has been designed to be simple in operation by using automatic sensitivity and gain adjustments, based on the Fourier transform to allow Nyquist sampling and adjustment periods. The depth monitor system utilizes a novel electromechanical depth monitor, with a microcomputer-based controller utilizing a Motorola MC68HC11.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130136024","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
Current-mode CMOS realization of a multiple-valued logic neurode 多值逻辑神经网络的电流模CMOS实现
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270575
M. Abd-El-Barr, R. Bolton, A.K. Jain
{"title":"Current-mode CMOS realization of a multiple-valued logic neurode","authors":"M. Abd-El-Barr, R. Bolton, A.K. Jain","doi":"10.1109/WESCAN.1993.270575","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270575","url":null,"abstract":"A new circuit is proposed for the realization of a multiple-valued logic (MVL) neurode, an electronic approximation of a human neuron, in a current-mode CMOS logic (CMCL) technology. A set of multiple-valued logic operators is presented. These operators include min, tsum, window literal, cycle, and complement. Basic circuits used to realize the MVL-neurode are also given. HSPICE simulation results to verify the operation of the MVL-neurode circuit are reported.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115405604","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
Universal isochronous payload multiplexing 通用等时负载复用
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270553
T. Friesen, W. Grover
{"title":"Universal isochronous payload multiplexing","authors":"T. Friesen, W. Grover","doi":"10.1109/WESCAN.1993.270553","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270553","url":null,"abstract":"The authors describe a technique to transport arbitrary-rate isochronous digital signals over the existing telecommunication network. Universal isochronous payload multiplexing (UIPM) uses re-configurable hardware under the control of an arbitrary-rate plesiochronous multiplexing algorithm. Simulation and hardware measurements are presented to validate the concept. The method provides a novel alternative to asynchronous transfer mode (ATM) packetization/depacketization for isochronous payloads that would be particularly sensitive to delay, delay variation, and cell loss effects from ATM networks. UIPM operates over existing network facilities and is thereby feasible prior to widespread broadband ISDN deployment. The primary technical challenges of UIPM are in the control of waiting time jitter and in the design of an arbitrary-rate desynchronizer circuit.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131767451","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
Comparison of methods for building a capacity model in generation capacity adequacy studies 发电能力充分性研究中建立容量模型的方法比较
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270566
D. Morrow, L. Gan
{"title":"Comparison of methods for building a capacity model in generation capacity adequacy studies","authors":"D. Morrow, L. Gan","doi":"10.1109/WESCAN.1993.270566","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270566","url":null,"abstract":"The authors provide a comparison of different methods of preparing a capacity outage probability distribution in generating capacity adequacy studies. The recursive method, also referred to as the unit addition algorithm, with different rounding steps and rounding methods is analyzed. Capacity rounding techniques are typically utilized when dealing with units of noninteger capacities to reduce execution time. A new capacity rounding technique is proposed, in which the outage capacities of a unit are rounded to the nearest capacity steps before the unit is added to the system. It is found that this method yields very good results while requiring less computing time. The cumulant method based on the well-known Gram-Charlier or Edgeworth expansion is studied and compared with the recursive method. The convergence behavior of the cumulant method as a function of unit forced outage rate (FOR) values is examined. The accuracy and computing requirements of each method are discussed.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127375715","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: 13
A technique for measuring inter-area damping contributions from power system stabilizers 一种测量电力系统稳定器区域间阻尼贡献的技术
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270581
K. Bollinger
{"title":"A technique for measuring inter-area damping contributions from power system stabilizers","authors":"K. Bollinger","doi":"10.1109/WESCAN.1993.270581","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270581","url":null,"abstract":"Some underlying causes of interarea oscillations between power pools consisting of steam and hydro units are outlined, and measurement techniques that facilitate the design of controllers to ameliorate the problem are described. The problem of lightly dampled oscillations on power systems is of interest to utilities in Canada and the US since interarea oscillations in some regions have meant derated power transfer on large interconnecting transmission lines. Simulation studies, eigenvalue analysis and state-space techniques, on-site transfer function measurement and controller design, and other analysis and design approaches have been applied in various approaches to designing power system stabilizers (PSSs) to damp these oscillations. One of the difficulties in designing and testing control strategies for damping interarea oscillations is measuring the relative interarea damping contribution from the control strategy being tested at a particular generator. Factors contributing to negative damping are reviewed, along with power system stabilizer tuning strategies. One approach to assessing damping contributions from PSSs during on-site testing is outlined.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927707","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
3-dimensional rendering of MR (magnetic resonance) images 磁共振图像的三维渲染
IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings Pub Date : 1993-05-17 DOI: 10.1109/WESCAN.1993.270569
C. Chu, K. Takaya
{"title":"3-dimensional rendering of MR (magnetic resonance) images","authors":"C. Chu, K. Takaya","doi":"10.1109/WESCAN.1993.270569","DOIUrl":"https://doi.org/10.1109/WESCAN.1993.270569","url":null,"abstract":"The authors deal with the perspective display of skin, skull, and brain surfaces from magnetic resonance (MR) head image data. To achieve the three-dimensional (3-D) rendering of MR images, the thresholding method and Laplacian of Gaussian (LoG) edge detector were employed to detect edges involved in the pictures. An automatic tracking scheme was also devised to extract the tissue boundaries from the detected edges. An existing surface shading method, called gradient shading, was implemented to display the extracted boundaries.<<ETX>>","PeriodicalId":146674,"journal":{"name":"IEEE WESCANEX 93 Communications, Computers and Power in the Modern Environment - Conference Proceedings","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127028865","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
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