Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202332
P. Maurer, Y.-S. Lee
Three techniques for handling cyclic circuits in a compiled unit-delay simulation are presented. These techniques are based on the PC-set method and the parallel technique of compiled unit-delay simulation. The first technique, called the synchronous parallel technique, is applicable only to synchronous circuits, but provides significant performance improvements over interpreted unit-delay simulation. The second and third techniques. called the convergence algorithm and the asynchronous parallel technique, are applicable to all circuits, both synchronous and asynchronous. The convergence algorithm, which is based on the PC-set method, provided significant performance increases for some circuits, but performed poorly on others. The asynchronous parallel technique performed rather poorly, and is covered only briefly.<>
{"title":"Compiled unit-delay simulation for cyclic circuits","authors":"P. Maurer, Y.-S. Lee","doi":"10.1109/SECON.1992.202332","DOIUrl":"https://doi.org/10.1109/SECON.1992.202332","url":null,"abstract":"Three techniques for handling cyclic circuits in a compiled unit-delay simulation are presented. These techniques are based on the PC-set method and the parallel technique of compiled unit-delay simulation. The first technique, called the synchronous parallel technique, is applicable only to synchronous circuits, but provides significant performance improvements over interpreted unit-delay simulation. The second and third techniques. called the convergence algorithm and the asynchronous parallel technique, are applicable to all circuits, both synchronous and asynchronous. The convergence algorithm, which is based on the PC-set method, provided significant performance increases for some circuits, but performed poorly on others. The asynchronous parallel technique performed rather poorly, and is covered only briefly.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134119431","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202321
M. Adjouadi, X.B. Zhang, D.C. Park
The authors present a stereo matching method that matches the Walsh coefficients for the recovery of the depth information in two-dimensional images. In this method, a stereo pair of images is transformed into the Walsh series and then decomposed into a pair of strings, carrying the first eight coefficients of the Walsh series as attributes. In order to explicitly integrate the uniqueness and the ordering constraints into the matching process, a string-to-string matching technique is applied to bring the two strings into correspondence. The experimental results obtained show that this method presents a very effective approach to the recovery of the depth information.<>
{"title":"A stereo matching process for the recovery of depth information","authors":"M. Adjouadi, X.B. Zhang, D.C. Park","doi":"10.1109/SECON.1992.202321","DOIUrl":"https://doi.org/10.1109/SECON.1992.202321","url":null,"abstract":"The authors present a stereo matching method that matches the Walsh coefficients for the recovery of the depth information in two-dimensional images. In this method, a stereo pair of images is transformed into the Walsh series and then decomposed into a pair of strings, carrying the first eight coefficients of the Walsh series as attributes. In order to explicitly integrate the uniqueness and the ordering constraints into the matching process, a string-to-string matching technique is applied to bring the two strings into correspondence. The experimental results obtained show that this method presents a very effective approach to the recovery of the depth information.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134604042","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202402
L.G. Clonts, D. Bouldin
Several advantages for using a hardware description language for logic synthesis are given along with some example programs. Variations in writing style are shown to have a significant effect on the optimization process used by the synthesizer since one style generally results in a physical layout that consumes only half that of another. Based on these experiences, a structured, object-oriented style that separates control and operations is recommended for the writing of area-efficient hardware descriptions.<>
{"title":"Writing area-efficient hardware descriptions for logic synthesis","authors":"L.G. Clonts, D. Bouldin","doi":"10.1109/SECON.1992.202402","DOIUrl":"https://doi.org/10.1109/SECON.1992.202402","url":null,"abstract":"Several advantages for using a hardware description language for logic synthesis are given along with some example programs. Variations in writing style are shown to have a significant effect on the optimization process used by the synthesizer since one style generally results in a physical layout that consumes only half that of another. Based on these experiences, a structured, object-oriented style that separates control and operations is recommended for the writing of area-efficient hardware descriptions.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"25 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131805692","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202331
J. Yuan, K. Pham
The model accounts for high electric field effect in the nMOS transistor and high current effects in the bipolar transistor for a wide temperature range. The analytical equations provide evaluation of the sensitivity of process and device parameters on circuit performance at different temperatures. Computer simulation results of a BiCMOS driver using the present analysis are compared with PISCES simulation in support of physical reasoning.<>
{"title":"BiCMOS gate delay analysis including temperature effect and high current transients","authors":"J. Yuan, K. Pham","doi":"10.1109/SECON.1992.202331","DOIUrl":"https://doi.org/10.1109/SECON.1992.202331","url":null,"abstract":"The model accounts for high electric field effect in the nMOS transistor and high current effects in the bipolar transistor for a wide temperature range. The analytical equations provide evaluation of the sensitivity of process and device parameters on circuit performance at different temperatures. Computer simulation results of a BiCMOS driver using the present analysis are compared with PISCES simulation in support of physical reasoning.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131893295","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202405
P. Pillay, M. Wu
The permanent magnetic synchronous motor (PMSM) drive system is described. The flowchart of a computer program, the application of vector control to the PMSM, and the complete modeling, simulation, and analysis of the drive system are given. State-space models of the motor and speed controller and real-time models of the inverter switches and vector controller are included. The efficiency of the drive system is discussed.<>
{"title":"A computer program to predict the performance of permanent magnet synchronous motor drives","authors":"P. Pillay, M. Wu","doi":"10.1109/SECON.1992.202405","DOIUrl":"https://doi.org/10.1109/SECON.1992.202405","url":null,"abstract":"The permanent magnetic synchronous motor (PMSM) drive system is described. The flowchart of a computer program, the application of vector control to the PMSM, and the complete modeling, simulation, and analysis of the drive system are given. State-space models of the motor and speed controller and real-time models of the inverter switches and vector controller are included. The efficiency of the drive system is discussed.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133567582","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202298
U. Kanitkar, J. Dudgeon
An edge detected two-dimensional image of bubbles dispersed in a flowing liquid was captured in a 256-by-256 pixel window. The image produced was a binary image. Upon consideration of the merits of different spectral transform methods, a Manz sequency ordered Walsh transform was chosen to obtain the power spectrum of the bubble image. Using the spectrum as the input to a three-layer neural network the bubble size distribution was predicted. Histograms showing bubble size distributions were the target outputs corresponding to sets of inputs. Neural network training involved using backpropagation in conjunction with a wide range of deviations. Bubble positions within the photograph were also varied. The input-output training pairs were simulated from images generated with known distributions and used to train the backpropagation network. The trained network was then tested using unseen images and the results were excellent.<>
{"title":"A Walsh transform-neural network method for estimating the size distribution of bubbles in a liquid","authors":"U. Kanitkar, J. Dudgeon","doi":"10.1109/SECON.1992.202298","DOIUrl":"https://doi.org/10.1109/SECON.1992.202298","url":null,"abstract":"An edge detected two-dimensional image of bubbles dispersed in a flowing liquid was captured in a 256-by-256 pixel window. The image produced was a binary image. Upon consideration of the merits of different spectral transform methods, a Manz sequency ordered Walsh transform was chosen to obtain the power spectrum of the bubble image. Using the spectrum as the input to a three-layer neural network the bubble size distribution was predicted. Histograms showing bubble size distributions were the target outputs corresponding to sets of inputs. Neural network training involved using backpropagation in conjunction with a wide range of deviations. Bubble positions within the photograph were also varied. The input-output training pairs were simulated from images generated with known distributions and used to train the backpropagation network. The trained network was then tested using unseen images and the results were excellent.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131321644","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202410
S. He, A. Elsherbeni, C.E. Smith
A numerical analysis of a two-conductor microstrip transmission line with a rectangular notch in the dielectric between two conducting strips is presented. Three media integral equations are derived and are solved for the charge distributions. The decoupling between such two-conductor microstrip transmission lines is investigated. It is found that the coupling between two conducting lines can be reduced significantly by removing dielectric material between the lines that have a rectangular shape. For the best decoupling, the width should be as wide as possible between the conducting lines, but the depth will have an optimum somewhere in the base dielectric substrate.<>
{"title":"Decoupling between two planar microstrip lines","authors":"S. He, A. Elsherbeni, C.E. Smith","doi":"10.1109/SECON.1992.202410","DOIUrl":"https://doi.org/10.1109/SECON.1992.202410","url":null,"abstract":"A numerical analysis of a two-conductor microstrip transmission line with a rectangular notch in the dielectric between two conducting strips is presented. Three media integral equations are derived and are solved for the charge distributions. The decoupling between such two-conductor microstrip transmission lines is investigated. It is found that the coupling between two conducting lines can be reduced significantly by removing dielectric material between the lines that have a rectangular shape. For the best decoupling, the width should be as wide as possible between the conducting lines, but the depth will have an optimum somewhere in the base dielectric substrate.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115362975","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202427
T. Murray, S. Bell, A. Abduljalil
A basic wireless monitoring control system was developed, including prototype modems, which will provide the means to transmit data through a radio link. The modems were connected to an IBM Compatible computer through an RS-232 interface. Two computer programs, generating normal ASCII data, were developed to provide the communications software between the computer and the modems. The hardware, software, and system operation are described.<>
{"title":"Radio frequency monitoring and control of energy and processing systems","authors":"T. Murray, S. Bell, A. Abduljalil","doi":"10.1109/SECON.1992.202427","DOIUrl":"https://doi.org/10.1109/SECON.1992.202427","url":null,"abstract":"A basic wireless monitoring control system was developed, including prototype modems, which will provide the means to transmit data through a radio link. The modems were connected to an IBM Compatible computer through an RS-232 interface. Two computer programs, generating normal ASCII data, were developed to provide the communications software between the computer and the modems. The hardware, software, and system operation are described.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115512387","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202357
M.K. Kasraian, A. Kishk, M. Tew
The radiation characteristics of splash plate feed antennas are studied numerically using the method of moments to solve an exact surface integral equation formulation. A step-by-step procedure was used to improve the radiation characteristics of the feed, resulting in several good feed designs. The feed efficiency was improved significantly. While the cross-polarization level of this feed is acceptable, it is higher than the level achieved by corrugated feeds.<>
{"title":"Radiation characteristics of loaded shaped splash plate antennas","authors":"M.K. Kasraian, A. Kishk, M. Tew","doi":"10.1109/SECON.1992.202357","DOIUrl":"https://doi.org/10.1109/SECON.1992.202357","url":null,"abstract":"The radiation characteristics of splash plate feed antennas are studied numerically using the method of moments to solve an exact surface integral equation formulation. A step-by-step procedure was used to improve the radiation characteristics of the feed, resulting in several good feed designs. The feed efficiency was improved significantly. While the cross-polarization level of this feed is acceptable, it is higher than the level achieved by corrugated feeds.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"223 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124435703","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}
Pub Date : 1992-04-12DOI: 10.1109/SECON.1992.202399
R. Shrivastava, S. Iyengar, D. Carver
An algorithm for reducing the amount of time spent by a production system in its MATCH phase is presented. The algorithm utilizes C language's arithmetic operations, which are not efficiently computed in standard production system languages, and also constricts the activity of the MATCH phase as performed in the OPS5 programming language. The parallelization is achieved by distributing the search amongst the nodes of a hypercube. The MATCH phase is an effort to satisfy the LHS (left hand side) of a PR (production rule) by the contents of a WM (working memory). C programming language was used for the implementation of the monkey-and-banana problem written in OPS5.<>
{"title":"An approach for parallelizing OPS5 production systems and a faster match, C based indexing scheme for hypercube machines","authors":"R. Shrivastava, S. Iyengar, D. Carver","doi":"10.1109/SECON.1992.202399","DOIUrl":"https://doi.org/10.1109/SECON.1992.202399","url":null,"abstract":"An algorithm for reducing the amount of time spent by a production system in its MATCH phase is presented. The algorithm utilizes C language's arithmetic operations, which are not efficiently computed in standard production system languages, and also constricts the activity of the MATCH phase as performed in the OPS5 programming language. The parallelization is achieved by distributing the search amongst the nodes of a hypercube. The MATCH phase is an effort to satisfy the LHS (left hand side) of a PR (production rule) by the contents of a WM (working memory). C programming language was used for the implementation of the monkey-and-banana problem written in OPS5.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128413778","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：