Pub Date : 1998-05-24DOI: 10.1109/CCECE.1998.685585
N. Al-Mutawaly, R. Findlay
Magnetic nerve stimulation is a non-invasive method of exciting neural tissue. Stimulation can be achieved by exposing the body to a transient magnetic field which is generated by passing a high current through a coil over short period of time. By positioning the coil in a specific orientation over the targeted nerve, the magnetic field will create an electric field in the conductive milieu of the body. Induced currents will result from that electric field. If those currents reach a certain amplitude within a specific time period this will cause a neural depolarization. This depolarization will enable us to test and examine the excited nerve providing the necessary data for an effective treatment. In this paper we describe a new design for the stimulating coil with the aim of achieving a more focused magnetic field. This resultant field will excite deep targeted nerves with minimum excitation to the surrounding nerves.
{"title":"A novel coil design for magnetic nerve stimulation","authors":"N. Al-Mutawaly, R. Findlay","doi":"10.1109/CCECE.1998.685585","DOIUrl":"https://doi.org/10.1109/CCECE.1998.685585","url":null,"abstract":"Magnetic nerve stimulation is a non-invasive method of exciting neural tissue. Stimulation can be achieved by exposing the body to a transient magnetic field which is generated by passing a high current through a coil over short period of time. By positioning the coil in a specific orientation over the targeted nerve, the magnetic field will create an electric field in the conductive milieu of the body. Induced currents will result from that electric field. If those currents reach a certain amplitude within a specific time period this will cause a neural depolarization. This depolarization will enable us to test and examine the excited nerve providing the necessary data for an effective treatment. In this paper we describe a new design for the stimulating coil with the aim of achieving a more focused magnetic field. This resultant field will excite deep targeted nerves with minimum excitation to the surrounding nerves.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121283528","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 : 1998-05-24DOI: 10.1109/CCECE.1998.682752
K. Fregene, D. Kennedy
Balanced transformations, in which an input property of a linear system (e.g. controllability) is 'symmetrized' or 'balanced' with an output properly (e.g. observability) by making a suitable choice of basis, are considered. Some algorithms available for computing these transformations are examined for both the first-order and second-order forms of linear time-invariant systems. An important feature of these methods is the simultaneous diagonalization of the controllability/observability Gramians by solving two Lyapunov equations. Different application areas of balanced transformations are highlighted and some limitations and/or problems are pointed out.
{"title":"Balanced transformations: their computation and some applications","authors":"K. Fregene, D. Kennedy","doi":"10.1109/CCECE.1998.682752","DOIUrl":"https://doi.org/10.1109/CCECE.1998.682752","url":null,"abstract":"Balanced transformations, in which an input property of a linear system (e.g. controllability) is 'symmetrized' or 'balanced' with an output properly (e.g. observability) by making a suitable choice of basis, are considered. Some algorithms available for computing these transformations are examined for both the first-order and second-order forms of linear time-invariant systems. An important feature of these methods is the simultaneous diagonalization of the controllability/observability Gramians by solving two Lyapunov equations. Different application areas of balanced transformations are highlighted and some limitations and/or problems are pointed out.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127623535","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 : 1998-05-24DOI: 10.1109/CCECE.1998.685541
N. Jaeger, C. Jaeger, H. Kato, F. Rahmatian, S. Cherukupalli, A. J. Vandermaar, G. S. Polovick
A prototype on-line, real-time relative dissipation factor system is described. Selected data recorded during a long-term, more than a year, experiment, conducted in a high-voltage laboratory, is presented. Data taken on "good" current transformers, data indicating the resolution of the system, and data taken during the actual failure of a current transformer are presented. The data presented illustrate the potential for on-line, real-time relative dissipation factor monitoring of fluid-paper insulation systems to help utilities maximize their use of capital intensive assets and reduce the risk of disruptive failures.
{"title":"An on-line real-time relative dissipation factor monitoring system","authors":"N. Jaeger, C. Jaeger, H. Kato, F. Rahmatian, S. Cherukupalli, A. J. Vandermaar, G. S. Polovick","doi":"10.1109/CCECE.1998.685541","DOIUrl":"https://doi.org/10.1109/CCECE.1998.685541","url":null,"abstract":"A prototype on-line, real-time relative dissipation factor system is described. Selected data recorded during a long-term, more than a year, experiment, conducted in a high-voltage laboratory, is presented. Data taken on \"good\" current transformers, data indicating the resolution of the system, and data taken during the actual failure of a current transformer are presented. The data presented illustrate the potential for on-line, real-time relative dissipation factor monitoring of fluid-paper insulation systems to help utilities maximize their use of capital intensive assets and reduce the risk of disruptive failures.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127708801","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 : 1998-05-24DOI: 10.1109/CCECE.1998.685587
M. Pande, S. Dewan
This paper presents dynamic analysis of a three-phase PWM voltage source rectifier based AC/DC power supply system using a feedforward/feedback control algorithm proposed by the authors previously. A small signal model of the power supply in s-domain is derived. This model is used in obtaining transfer functions describing the response of the DC output voltage following load, line and reference changes. The dynamic analysis is verified by transfer function simulation using MATLAB and time domain simulation of the power supply system.
{"title":"Modeling and dynamic analysis of a fast response three phase PWM voltage source rectifier","authors":"M. Pande, S. Dewan","doi":"10.1109/CCECE.1998.685587","DOIUrl":"https://doi.org/10.1109/CCECE.1998.685587","url":null,"abstract":"This paper presents dynamic analysis of a three-phase PWM voltage source rectifier based AC/DC power supply system using a feedforward/feedback control algorithm proposed by the authors previously. A small signal model of the power supply in s-domain is derived. This model is used in obtaining transfer functions describing the response of the DC output voltage following load, line and reference changes. The dynamic analysis is verified by transfer function simulation using MATLAB and time domain simulation of the power supply system.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128078852","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 : 1998-05-24DOI: 10.1109/CCECE.1998.682754
R.S. Pira, J. Robinson
This paper investigates the development and implementation of an asynchronous telemedicine application for the purposes of tele-consultation in remote regions. Three applications were developed: MailTeleMed, WebTeleMed and MCLTeleMed utilizing various communication and database models.
{"title":"Supporting asynchronous telemedicine: multimedia mail vs. the World Wide Web vs. replicated databases","authors":"R.S. Pira, J. Robinson","doi":"10.1109/CCECE.1998.682754","DOIUrl":"https://doi.org/10.1109/CCECE.1998.682754","url":null,"abstract":"This paper investigates the development and implementation of an asynchronous telemedicine application for the purposes of tele-consultation in remote regions. Three applications were developed: MailTeleMed, WebTeleMed and MCLTeleMed utilizing various communication and database models.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132695466","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 : 1998-05-24DOI: 10.1109/CCECE.1998.682750
E.Y.O. Sidi, P. Sicard, D. Massicotte, S. Lesueur
Dynamic position-control of a flexible joint is proposed by applying adaptive control and artificial neural networks (ANNs). A flexible joint is modeled, including Coulomb and static frictions and the model is represented as an ANN. The control strategy is based on a dual loop strategy. An outer load state feedback is used to compute desired load torque and motor state. An inner motor state feedback loop is used to control the motor. Both loops use feedforward compensation of friction. The controllers are represented as an ANN, the system parameters being the weights of the output layer. Parameter identification is achieved using the recursive least squares algorithm. Simulation results show that the proposed controller can suppress vibrations.
{"title":"Adaptive high precision position control for a flexible joint with friction and parameter uncertainties using neural networks","authors":"E.Y.O. Sidi, P. Sicard, D. Massicotte, S. Lesueur","doi":"10.1109/CCECE.1998.682750","DOIUrl":"https://doi.org/10.1109/CCECE.1998.682750","url":null,"abstract":"Dynamic position-control of a flexible joint is proposed by applying adaptive control and artificial neural networks (ANNs). A flexible joint is modeled, including Coulomb and static frictions and the model is represented as an ANN. The control strategy is based on a dual loop strategy. An outer load state feedback is used to compute desired load torque and motor state. An inner motor state feedback loop is used to control the motor. Both loops use feedforward compensation of friction. The controllers are represented as an ANN, the system parameters being the weights of the output layer. Parameter identification is achieved using the recursive least squares algorithm. Simulation results show that the proposed controller can suppress vibrations.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133209280","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 : 1998-05-24DOI: 10.1109/CCECE.1998.685646
Y. Zhao, M. Swamy
A technique for tracking the time-varying minimum of a time-dependent function is proposed. It ensures the tracking process converge exponentially. It also enables the tracking to move from the minimum at one instant of time to the minimum at the next instant of time, without any error. Examples are given to show that this technique is effective for tracking the time-varying minimum. Application of this technique to on-line continuous system identification, on-line neural network learning, etc. gives rise to improved results.
{"title":"A novel technique for tracking time-varying minimum and its applications","authors":"Y. Zhao, M. Swamy","doi":"10.1109/CCECE.1998.685646","DOIUrl":"https://doi.org/10.1109/CCECE.1998.685646","url":null,"abstract":"A technique for tracking the time-varying minimum of a time-dependent function is proposed. It ensures the tracking process converge exponentially. It also enables the tracking to move from the minimum at one instant of time to the minimum at the next instant of time, without any error. Examples are given to show that this technique is effective for tracking the time-varying minimum. Application of this technique to on-line continuous system identification, on-line neural network learning, etc. gives rise to improved results.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134229905","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 : 1998-05-24DOI: 10.1109/CCECE.1998.682708
Xiangqun Sun, C. Carter
Search and rescue satellite-aided tracking (SARSAT) involves the use of satellites in low-polar orbits which relay the emergency signals of distressed vehicles to an earth station for signal analysis. We compare three methods of spectral estimation for coherent emergency locator transmitter signals.
{"title":"Spectrum averaging in ELT signal processing","authors":"Xiangqun Sun, C. Carter","doi":"10.1109/CCECE.1998.682708","DOIUrl":"https://doi.org/10.1109/CCECE.1998.682708","url":null,"abstract":"Search and rescue satellite-aided tracking (SARSAT) involves the use of satellites in low-polar orbits which relay the emergency signals of distressed vehicles to an earth station for signal analysis. We compare three methods of spectral estimation for coherent emergency locator transmitter signals.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134397981","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 : 1998-05-24DOI: 10.1109/CCECE.1998.682783
S. Wesolkowski, P. Bowman, David Tunnah
This paper describes a potential implementation of a high speed colour cheque image processing system. The description starts with the overall architecture of a colour image capture system. The system's image processing capabilities include gray balancing, colour space conversion, colour image binarization to segment the text from the background and could include in the future cheque amount recognition from the binary image. An original algorithm based on colour clustering is introduced to improve the image binarization process. To test various components of the system, a prototype colour image capture system was built. Initial results on image binarization are shown.
{"title":"A high speed colour cheque image capture and processing system","authors":"S. Wesolkowski, P. Bowman, David Tunnah","doi":"10.1109/CCECE.1998.682783","DOIUrl":"https://doi.org/10.1109/CCECE.1998.682783","url":null,"abstract":"This paper describes a potential implementation of a high speed colour cheque image processing system. The description starts with the overall architecture of a colour image capture system. The system's image processing capabilities include gray balancing, colour space conversion, colour image binarization to segment the text from the background and could include in the future cheque amount recognition from the binary image. An original algorithm based on colour clustering is introduced to improve the image binarization process. To test various components of the system, a prototype colour image capture system was built. Initial results on image binarization are shown.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132592427","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 : 1998-05-24DOI: 10.1109/CCECE.1998.682534
Yuping Ding, Xining Li
The paper presents the cache performance analysis of the Chronological Garbage Collection algorithm used in the LVM system. The LVM is a new Logic Virtual Machine for Prolog. It adopts one stack policy for all dynamic memory requirements and cooperates with an efficient garbage collection algorithm, Chronological Garbage Collection to recuperate space, not as deliberate garbage collection operation but as a natural activity of the LVM engine to gather useful objects. This algorithm takes advantages of the traditional copying, mark-compact, generational, and incremental garbage collection schemes. In order to determine the improvement of cache performance under our garbage collection algorithm, we developed an emulator to do the trace driven cache simulation. Direct mapped cache and set-associative cache with different cache sizes, block sizes and set associativities are simulated and measured. The objectives of this simulation are to verify and validate our experimental results, and to find important factors which influence the performance of the CGC algorithm.
{"title":"Cache performance of chronological garbage collection","authors":"Yuping Ding, Xining Li","doi":"10.1109/CCECE.1998.682534","DOIUrl":"https://doi.org/10.1109/CCECE.1998.682534","url":null,"abstract":"The paper presents the cache performance analysis of the Chronological Garbage Collection algorithm used in the LVM system. The LVM is a new Logic Virtual Machine for Prolog. It adopts one stack policy for all dynamic memory requirements and cooperates with an efficient garbage collection algorithm, Chronological Garbage Collection to recuperate space, not as deliberate garbage collection operation but as a natural activity of the LVM engine to gather useful objects. This algorithm takes advantages of the traditional copying, mark-compact, generational, and incremental garbage collection schemes. In order to determine the improvement of cache performance under our garbage collection algorithm, we developed an emulator to do the trace driven cache simulation. Direct mapped cache and set-associative cache with different cache sizes, block sizes and set associativities are simulated and measured. The objectives of this simulation are to verify and validate our experimental results, and to find important factors which influence the performance of the CGC algorithm.","PeriodicalId":177613,"journal":{"name":"Conference Proceedings. IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.98TH8341)","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117333745","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}
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