Pub Date : 1995-08-13DOI: 10.1109/MWSCAS.1995.504469
Tsurng-Jehng Shen, F. Mora-Camino, K. Achaibou
Proposes a new neural network structure to design a robust controller for non-exactly known nonlinear systems. Based on input-output data, the neural network structure provides a global affine model of the controlled system which is compatible with well known nonlinear control techniques. An affine neural tracking controller is developed and applied to an inverted pendulum submitted to random perturbations. The performance of the controller and the main advantage of the proposed approach are discussed.
{"title":"A new neural network structure dedicated to the control of nonlinear systems","authors":"Tsurng-Jehng Shen, F. Mora-Camino, K. Achaibou","doi":"10.1109/MWSCAS.1995.504469","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504469","url":null,"abstract":"Proposes a new neural network structure to design a robust controller for non-exactly known nonlinear systems. Based on input-output data, the neural network structure provides a global affine model of the controlled system which is compatible with well known nonlinear control techniques. An affine neural tracking controller is developed and applied to an inverted pendulum submitted to random perturbations. The performance of the controller and the main advantage of the proposed approach are discussed.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130609890","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510354
A. Klemt, A. Infantosi
A method for reduction of processing time in 3D visualization is proposed, in which normals and hence visibility of surfaces are precalculated by dividing the space into equal-angled units. This is suitable for tutorial systems for human anatomy based on standard microcomputers. In the case of a simple anatomic structure (mandible), average reduction of 60% in computation time for visibility determination was achieved. For complex objects, as is the case of the skull, average reduction for visibility determination was 67%, maintaining the quality of 3D reconstruction.
{"title":"Classification of surface normals in a tutorial microcomputer-based system for anatomy","authors":"A. Klemt, A. Infantosi","doi":"10.1109/MWSCAS.1995.510354","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510354","url":null,"abstract":"A method for reduction of processing time in 3D visualization is proposed, in which normals and hence visibility of surfaces are precalculated by dividing the space into equal-angled units. This is suitable for tutorial systems for human anatomy based on standard microcomputers. In the case of a simple anatomic structure (mandible), average reduction of 60% in computation time for visibility determination was achieved. For complex objects, as is the case of the skull, average reduction for visibility determination was 67%, maintaining the quality of 3D reconstruction.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128156743","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510209
A.K. Barros, N. Ohnishi, M. Yoshizawa
A simple analysis of the mean squared error (MSE) behavior for Fourier linear combiner (FLC) based filters is presented, using the independence assumption. The advantage of this analysis is its simplicity if compared with previous results. The MSE transient behavior for this kind of filters is also studied for the first time. With this assumption, we can design the filter without a priori knowledge of the signal or noises's statistics.
{"title":"Learning characteristics of event-related filters","authors":"A.K. Barros, N. Ohnishi, M. Yoshizawa","doi":"10.1109/MWSCAS.1995.510209","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510209","url":null,"abstract":"A simple analysis of the mean squared error (MSE) behavior for Fourier linear combiner (FLC) based filters is presented, using the independence assumption. The advantage of this analysis is its simplicity if compared with previous results. The MSE transient behavior for this kind of filters is also studied for the first time. With this assumption, we can design the filter without a priori knowledge of the signal or noises's statistics.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128167558","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510224
J. S. Neto, S.doN. Neto, Francisco Nascimento
A Self-Organizing Map (SOM) Neural Network for dynamic bit allocation in Adaptive Image Transform Coding is presented. The results shown in this paper are for nets with 30, 96 and 128 neurons in the input layer and 100 (10/spl times/10) neurons in the competition layer. The Learning Vector Quantization LVQ1 algorithm was used to enhance the clustering in the map.
{"title":"Dynamic bit allocation in image coding using a Self-Organizing Map with Learning Vector Quantization","authors":"J. S. Neto, S.doN. Neto, Francisco Nascimento","doi":"10.1109/MWSCAS.1995.510224","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510224","url":null,"abstract":"A Self-Organizing Map (SOM) Neural Network for dynamic bit allocation in Adaptive Image Transform Coding is presented. The results shown in this paper are for nets with 30, 96 and 128 neurons in the input layer and 100 (10/spl times/10) neurons in the competition layer. The Learning Vector Quantization LVQ1 algorithm was used to enhance the clustering in the map.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131907555","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510348
M. H. Costa, M. C. Tavares, C. M. Richter, L. Castagno
The vestibular system is important to the maintenance of the static and dynamic equilibrium system of the human body. Disfunctions within this system may lead to abnormal reflex eye movements named nystagmus. The study and analysis of these nystagmus are needed to the precise diagnosis of various pathologies, and is best done with electronystagmography (ENG). Manual analysis of the ENG record is time-consuming, therefore a computerized system was developed for data processing and an algorithm for the automatic evaluation of the nystagmus' slow-component velocity. This algorithm allows a faster and precise evaluation of the nystagmus, through artifact rejection techniques. Comparisons among results obtained with the computerized algorithm and analysis of four specialists over a collection of selected signals presented an error lower than 1/spl deg//s (degrees per second) related to the clinically obtained mean.
{"title":"Automatic analysis of electronystagmographic signals","authors":"M. H. Costa, M. C. Tavares, C. M. Richter, L. Castagno","doi":"10.1109/MWSCAS.1995.510348","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510348","url":null,"abstract":"The vestibular system is important to the maintenance of the static and dynamic equilibrium system of the human body. Disfunctions within this system may lead to abnormal reflex eye movements named nystagmus. The study and analysis of these nystagmus are needed to the precise diagnosis of various pathologies, and is best done with electronystagmography (ENG). Manual analysis of the ENG record is time-consuming, therefore a computerized system was developed for data processing and an algorithm for the automatic evaluation of the nystagmus' slow-component velocity. This algorithm allows a faster and precise evaluation of the nystagmus, through artifact rejection techniques. Comparisons among results obtained with the computerized algorithm and analysis of four specialists over a collection of selected signals presented an error lower than 1/spl deg//s (degrees per second) related to the clinically obtained mean.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132240831","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510344
C. Hwang, A. Motamed, M. Ismail
In this paper we propose a new implementation method for the design of op amp input stage with rail-to-rail constant-g/sub m/. The new implementation is based on processing signal currents rather than handling DC tail currents. As a result, it is universal in that the constant-g/sub m/ can be obtained independent of input transistor types (MOS or bipolar) and their operating regions (weak or strong inversion for MOS and active for bipolar). To demonstrate the idea, a new MOS-type input stage has been designed with a 2-/spl mu/m CMOS process and simulation results of input stage transconductance are provided. The common mode input voltage can even exceed the positive and the negative rails by 300 mV.
本文提出了一种轨对轨常数为g/sub / m/的运放输入级设计的新实现方法。新的实现是基于处理信号电流，而不是处理直流尾电流。因此，它是通用的，因为常数g/sub m/可以独立于输入晶体管类型(MOS或双极)及其工作区域(MOS为弱反转或强反转，双极为有源)而获得。为了验证这一思想，采用2-/spl μ m CMOS工艺设计了一种新型mos型输入级，并给出了输入级跨导的仿真结果。共模输入电压甚至可以超过正负轨300毫伏。
{"title":"A new implementation of constant-g/sub m/ op amp input stage for CMOS low voltage applications","authors":"C. Hwang, A. Motamed, M. Ismail","doi":"10.1109/MWSCAS.1995.510344","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510344","url":null,"abstract":"In this paper we propose a new implementation method for the design of op amp input stage with rail-to-rail constant-g/sub m/. The new implementation is based on processing signal currents rather than handling DC tail currents. As a result, it is universal in that the constant-g/sub m/ can be obtained independent of input transistor types (MOS or bipolar) and their operating regions (weak or strong inversion for MOS and active for bipolar). To demonstrate the idea, a new MOS-type input stage has been designed with a 2-/spl mu/m CMOS process and simulation results of input stage transconductance are provided. The common mode input voltage can even exceed the positive and the negative rails by 300 mV.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134502120","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510172
M. Jordan
This paper presents a new approach to adaptive predictive control systems with robust characteristics based on nonparametric descriptions. The estimator deals with a parsimonious model of a linear stable plant based on discrete Laguerre functions. The model uncertainties are captured by the estimator as time-varying upper and lower bounds for the Laguerre coefficients. Combining the family of uncertain models with predictive control techniques in an adaptive control loop robust stability can be ensured in a Kharitonov hypercube in the space of controller coefficient. Robust stability conditions and convergence properties of the adaptive control system are performed.
{"title":"Adaptive robust control using discrete Laguerre functions","authors":"M. Jordan","doi":"10.1109/MWSCAS.1995.510172","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510172","url":null,"abstract":"This paper presents a new approach to adaptive predictive control systems with robust characteristics based on nonparametric descriptions. The estimator deals with a parsimonious model of a linear stable plant based on discrete Laguerre functions. The model uncertainties are captured by the estimator as time-varying upper and lower bounds for the Laguerre coefficients. Combining the family of uncertain models with predictive control techniques in an adaptive control loop robust stability can be ensured in a Kharitonov hypercube in the space of controller coefficient. Robust stability conditions and convergence properties of the adaptive control system are performed.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134383076","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510306
J.M.F.D. Costa, M.M. Silva
Small-signal models of quasi-square-wave (QSW) converters are obtained by using state-space averaging. These models are used to perform a comparative study which shows that current-mode control of QSW converters does not provide the improved dynamic performance with respect to voltage-mode control that can be found in the case of PWM and quasi-resonant converters.
{"title":"Small-signal models and dynamic performance of quasi-square-wave ZVS converters with voltage-mode and current-mode control","authors":"J.M.F.D. Costa, M.M. Silva","doi":"10.1109/MWSCAS.1995.510306","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510306","url":null,"abstract":"Small-signal models of quasi-square-wave (QSW) converters are obtained by using state-space averaging. These models are used to perform a comparative study which shows that current-mode control of QSW converters does not provide the improved dynamic performance with respect to voltage-mode control that can be found in the case of PWM and quasi-resonant converters.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133446669","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504368
L. Pirmez, F. C. Carneiro, A. Pedroza, A.C. de Mesquita
A methodology that efficiently transforms Estelle specifications into VHDL descriptions, so that later on integrated circuits can be easily created, is presented. The methodology is based on the silicon compilation technique and its aim is to implement an integrated circuit from a specification in VHDL. Simulation results in Estelle and in VHDL languages are discussed.
{"title":"A methodology to develop integrated circuits from Estelle specifications","authors":"L. Pirmez, F. C. Carneiro, A. Pedroza, A.C. de Mesquita","doi":"10.1109/MWSCAS.1995.504368","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504368","url":null,"abstract":"A methodology that efficiently transforms Estelle specifications into VHDL descriptions, so that later on integrated circuits can be easily created, is presented. The methodology is based on the silicon compilation technique and its aim is to implement an integrated circuit from a specification in VHDL. Simulation results in Estelle and in VHDL languages are discussed.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"50 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132335988","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510204
N. Maheshwari, S. Sapatnekar
A transistor sizing algorithm for row-based layouts is presented under an improved area model. This algorithm uses convex programming to find a minimal area circuit for a given delay specification. The new area model uses a concept of row heights as opposed to the conventional metric of sum of gate sizes. Results over a number of circuits indicate a significant reduction both in the minimum delay achievable and area as compared to TILOS-like optimizer.
{"title":"Gate size optimization for row-based layouts","authors":"N. Maheshwari, S. Sapatnekar","doi":"10.1109/MWSCAS.1995.510204","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510204","url":null,"abstract":"A transistor sizing algorithm for row-based layouts is presented under an improved area model. This algorithm uses convex programming to find a minimal area circuit for a given delay specification. The new area model uses a concept of row heights as opposed to the conventional metric of sum of gate sizes. Results over a number of circuits indicate a significant reduction both in the minimum delay achievable and area as compared to TILOS-like optimizer.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122373385","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：