In this work a discrete-time model for the Pendubot is proposed based on the symplectic Euler method. Then, a discrete-time sliding mode controller and observer are designed. A simulation study is carried on in order to verify the good performance of the proposed modeling and control scheme when compared to the case of using explicit Euler method for discrete-time modeling.
{"title":"Discrete-Time Modeling and Control of an Under-actuated Robotic System","authors":"J. Rivera, Luis Garcia, S. Ortega, J. Raygoza","doi":"10.1109/CERMA.2010.120","DOIUrl":"https://doi.org/10.1109/CERMA.2010.120","url":null,"abstract":"In this work a discrete-time model for the Pendubot is proposed based on the symplectic Euler method. Then, a discrete-time sliding mode controller and observer are designed. A simulation study is carried on in order to verify the good performance of the proposed modeling and control scheme when compared to the case of using explicit Euler method for discrete-time modeling.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121514798","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}
M. D. Jiménez, P. Rosales-Quintero, A. Torres-Jácome, J. Molina-Reyes, M. Moreno-Moreno, F. J. de la Hidalga-Wade, C. Zuñiga-Islas, W. Calleja-Arriaga
In this work, we report the characterization of Spin-On Glass (SOG) as low temperature gate insulator. The SOG film was deposited at a temperature of 200°C, which is compatible to use on flexible substrates. The optical and electrical characterization showed that the refractive index and dielectric constant are very close to those of thermally grown SiO2. We demonstrated the use of SOG as gate insulator, fabricating and characterizing a-SiGe: H TFTs.
在这项工作中，我们报道了自旋玻璃(SOG)作为低温栅绝缘子的表征。在200°C的温度下沉积SOG薄膜，该薄膜与柔性基板兼容。光学和电学表征表明，其折射率和介电常数与热生长SiO2的折射率和介电常数非常接近。我们演示了使用SOG作为栅极绝缘体，制造和表征a-SiGe: H tft。
{"title":"Spin-On Glass as Low-Temperature Gate Insulator for Thin-Film Transistors","authors":"M. D. Jiménez, P. Rosales-Quintero, A. Torres-Jácome, J. Molina-Reyes, M. Moreno-Moreno, F. J. de la Hidalga-Wade, C. Zuñiga-Islas, W. Calleja-Arriaga","doi":"10.1109/CERMA.2010.87","DOIUrl":"https://doi.org/10.1109/CERMA.2010.87","url":null,"abstract":"In this work, we report the characterization of Spin-On Glass (SOG) as low temperature gate insulator. The SOG film was deposited at a temperature of 200°C, which is compatible to use on flexible substrates. The optical and electrical characterization showed that the refractive index and dielectric constant are very close to those of thermally grown SiO2. We demonstrated the use of SOG as gate insulator, fabricating and characterizing a-SiGe: H TFTs.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115177311","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}
Gutierrez Diaz de Leon Luis Alberto, F. Alberto, Gutierrez Diaz de Leon Carlos Adrian
This work consider the scheduling of periodic tasks or processes with real-time constraints in a distributed environment. Each task must be executed meeting deadlines, precedence relationships and resources constraints. The problem of scheduling tasks on a distributed environment can be viewed as a problem of assigning processes to the processors but keeping the schedulability in local environments. Thus, the problem can be divided in two phases: the first phase is assigning processes to processors and the second is to schedule assigned processes in each processor in the distributed environment. This paper focuses in the first phase. It introduces a heuristic mechanism for assigning processes in a distributed environment with real-time constraints. The heuristic mechanism has two alternative ways to perform: one takes into account the utilization factor and the other considers period. The performance of both alternatives proposed is evaluated via simulation on a high performance-computing platform.
{"title":"Use of Supercomputing towards the Generation of a Process Execution Plan in Distributed Real-Time Systems","authors":"Gutierrez Diaz de Leon Luis Alberto, F. Alberto, Gutierrez Diaz de Leon Carlos Adrian","doi":"10.1109/CERMA.2010.97","DOIUrl":"https://doi.org/10.1109/CERMA.2010.97","url":null,"abstract":"This work consider the scheduling of periodic tasks or processes with real-time constraints in a distributed environment. Each task must be executed meeting deadlines, precedence relationships and resources constraints. The problem of scheduling tasks on a distributed environment can be viewed as a problem of assigning processes to the processors but keeping the schedulability in local environments. Thus, the problem can be divided in two phases: the first phase is assigning processes to processors and the second is to schedule assigned processes in each processor in the distributed environment. This paper focuses in the first phase. It introduces a heuristic mechanism for assigning processes in a distributed environment with real-time constraints. The heuristic mechanism has two alternative ways to perform: one takes into account the utilization factor and the other considers period. The performance of both alternatives proposed is evaluated via simulation on a high performance-computing platform.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127927935","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}
E. Lugo-González, L. Hernández-Gómez, R. Ponce-Reynoso, A. T. Velázquez-Sánchez, G. Urriolagoitia-Sosa, E. A. Merchán-Cruz, J. Ramírez-Gordillo
This paper present the analysis of the manipulation of some parameters to improve the performance of genetic algorithm based planar mechanism synthesis, such as the mutation and crossover probability and the population size, applied to a specific case of dimensional optimization, to obtain the best results for a group of design variables that achieve the best performance in the design of planar mechanisms, whose evaluation is expressed by means of an objective function that has to meet certain restrictions or requirements to minimize the error between the desired and generated trajectory of the coupler link, since the objective of path generation is to find the mechanism that properly describes the desired curve in shape, size, orientation and position. Two examples are given for illustration, for which the mentioned parameters are manipulated to see the effects of these on the final result for the minimization of the error and the value of variables involved in the dimensions of the links and the motion angles.
{"title":"Performance Optimization of GA Based Planar Mechanism Synthesis","authors":"E. Lugo-González, L. Hernández-Gómez, R. Ponce-Reynoso, A. T. Velázquez-Sánchez, G. Urriolagoitia-Sosa, E. A. Merchán-Cruz, J. Ramírez-Gordillo","doi":"10.1109/CERMA.2010.26","DOIUrl":"https://doi.org/10.1109/CERMA.2010.26","url":null,"abstract":"This paper present the analysis of the manipulation of some parameters to improve the performance of genetic algorithm based planar mechanism synthesis, such as the mutation and crossover probability and the population size, applied to a specific case of dimensional optimization, to obtain the best results for a group of design variables that achieve the best performance in the design of planar mechanisms, whose evaluation is expressed by means of an objective function that has to meet certain restrictions or requirements to minimize the error between the desired and generated trajectory of the coupler link, since the objective of path generation is to find the mechanism that properly describes the desired curve in shape, size, orientation and position. Two examples are given for illustration, for which the mentioned parameters are manipulated to see the effects of these on the final result for the minimization of the error and the value of variables involved in the dimensions of the links and the motion angles.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127986331","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}
L. Flores-Pulido, G. Rodríguez-Gómez, O. Starostenko, Carlos Santacruz-Olmos
Visual image retrieval systems imply novel approaches to improve their performance. Search methods require mathematical formalism for feature extraction of multi medial data. Euclidean distance is not enough approach for extracting similarity between images. Radial basis function provides necessary optimization for similarity measures when query image is used as reference. This paper explains a novel method exploiting radial basis function applied for visual image retrieval area. The goal of the approach is the searching process optimization for image retrieval which is obtained results reveal interesting conclusions about advantages of the proposed method even conventional similarity measurement approaches used in content based retrieval area.
{"title":"Radial Basis Function for Visual Image Retrieval","authors":"L. Flores-Pulido, G. Rodríguez-Gómez, O. Starostenko, Carlos Santacruz-Olmos","doi":"10.1109/CERMA.2010.51","DOIUrl":"https://doi.org/10.1109/CERMA.2010.51","url":null,"abstract":"Visual image retrieval systems imply novel approaches to improve their performance. Search methods require mathematical formalism for feature extraction of multi medial data. Euclidean distance is not enough approach for extracting similarity between images. Radial basis function provides necessary optimization for similarity measures when query image is used as reference. This paper explains a novel method exploiting radial basis function applied for visual image retrieval area. The goal of the approach is the searching process optimization for image retrieval which is obtained results reveal interesting conclusions about advantages of the proposed method even conventional similarity measurement approaches used in content based retrieval area.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123941419","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}
J. Torres-Jiménez, J. L. Guardado, F. Rivas, S. Maximov, E. Melgoza
This paper describes a genetic algorithm (GA) developed for the reconfiguration of radial distribution systems. The reconfiguration is treated as an optimization problem of combinatory nature, where the aim is to obtain a configuration with minimal power losses, iterations and also with some distribution system restrictions. The initial population of the GA is obtained using spanning trees techniques (ST). Further, efficient operators for crossing and mutation are used to explore the search space. Each individual aptitude is evaluated by means of a power flows program. The developed algorithm is applied to a distribution system reconfiguration, obtaining satisfactory results.
{"title":"Reconfiguration of Power Distribution Systems Using Genetic Algorithms and Spanning Trees","authors":"J. Torres-Jiménez, J. L. Guardado, F. Rivas, S. Maximov, E. Melgoza","doi":"10.1109/CERMA.2010.144","DOIUrl":"https://doi.org/10.1109/CERMA.2010.144","url":null,"abstract":"This paper describes a genetic algorithm (GA) developed for the reconfiguration of radial distribution systems. The reconfiguration is treated as an optimization problem of combinatory nature, where the aim is to obtain a configuration with minimal power losses, iterations and also with some distribution system restrictions. The initial population of the GA is obtained using spanning trees techniques (ST). Further, efficient operators for crossing and mutation are used to explore the search space. Each individual aptitude is evaluated by means of a power flows program. The developed algorithm is applied to a distribution system reconfiguration, obtaining satisfactory results.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124159991","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}
A. García-Almanza, Biliana Alexandrova-Kabadjova, Serafín Martínez-Jaramillo
This paper presents a novel method to predict bankruptcy, using a Genetic Programming (GP) based approach called Evolving Decision Rules (EDR). In order to obtain the optimum parameters of the classifying mechanism, we use a data set, obtained from the US Federal Deposit Insurance Corporation (FDIC). The set consists of limited financial institutions’ data, presented as variables widely used to detect bank failure. The outcome is a set of comprehensible decision rules, which allows to identify cases of bankruptcy. Further, the reliability of those rules is measured in terms of the true and false positive rate, calculated over the whole data set and plot over the Receiving Operating Characteristic (ROC) space. In order to test the accuracy performance of the mechanism, we elaborate two experiments: the first, aimed to test the degree of the variables’ usefulness, provides a quantitative and a qualitative analysis. The second experiment completed over 1000 different re-sampled cases is used to measure the performance of the approach. To our knowledge this is the first computational technique in this field able to give useful insights of the method’s predictive structure. The main contributions of this work are three: first, we want to bring to the arena of bankruptcy prediction a competitive novel method which in pure performance terms is comparable to state of the art methods recently proposed in similar works, second, this method provides the additional advantage of transparency as the generated rules are fully interpretable in terms of simple financial ratios, third and final, the proposed method includes cutting edge techniques to handle highly unbalanced samples, something that is very common in bankruptcy applications.
{"title":"Understanding Bank Failure: A Close Examination of Rules Created by Genetic Programming","authors":"A. García-Almanza, Biliana Alexandrova-Kabadjova, Serafín Martínez-Jaramillo","doi":"10.1109/CERMA.2010.14","DOIUrl":"https://doi.org/10.1109/CERMA.2010.14","url":null,"abstract":"This paper presents a novel method to predict bankruptcy, using a Genetic Programming (GP) based approach called Evolving Decision Rules (EDR). In order to obtain the optimum parameters of the classifying mechanism, we use a data set, obtained from the US Federal Deposit Insurance Corporation (FDIC). The set consists of limited financial institutions’ data, presented as variables widely used to detect bank failure. The outcome is a set of comprehensible decision rules, which allows to identify cases of bankruptcy. Further, the reliability of those rules is measured in terms of the true and false positive rate, calculated over the whole data set and plot over the Receiving Operating Characteristic (ROC) space. In order to test the accuracy performance of the mechanism, we elaborate two experiments: the first, aimed to test the degree of the variables’ usefulness, provides a quantitative and a qualitative analysis. The second experiment completed over 1000 different re-sampled cases is used to measure the performance of the approach. To our knowledge this is the first computational technique in this field able to give useful insights of the method’s predictive structure. The main contributions of this work are three: first, we want to bring to the arena of bankruptcy prediction a competitive novel method which in pure performance terms is comparable to state of the art methods recently proposed in similar works, second, this method provides the additional advantage of transparency as the generated rules are fully interpretable in terms of simple financial ratios, third and final, the proposed method includes cutting edge techniques to handle highly unbalanced samples, something that is very common in bankruptcy applications.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"39 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133219092","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}
J. L. Sánchez-Cervantes, G. Alor-Hernández, U. Juárez-Martínez
The diversity of hospitals and medical specialists generates the dispersion or isolation of the medical information of those entities causing its difficult location. The location of medical entities is very useful for health care of people especially when the information of such entities is isolated and is necessary an information system in order to integrate all this information in a single unit for faster access to the benefit of specialists in health care and society in general. This paper proposes ITOHealth which is a multimodal system that provides the necessary mechanisms to record and manage the information from medical entities in a single Web site for easy location through two options: a PHP Web and J2ME application.
{"title":"ITOHealth: A Multimodal Location-Based System for Discovering Medical Entities","authors":"J. L. Sánchez-Cervantes, G. Alor-Hernández, U. Juárez-Martínez","doi":"10.1109/CERMA.2010.101","DOIUrl":"https://doi.org/10.1109/CERMA.2010.101","url":null,"abstract":"The diversity of hospitals and medical specialists generates the dispersion or isolation of the medical information of those entities causing its difficult location. The location of medical entities is very useful for health care of people especially when the information of such entities is isolated and is necessary an information system in order to integrate all this information in a single unit for faster access to the benefit of specialists in health care and society in general. This paper proposes ITOHealth which is a multimodal system that provides the necessary mechanisms to record and manage the information from medical entities in a single Web site for easy location through two options: a PHP Web and J2ME application.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130406558","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}
J. Galan-Hernandez, V. Alarcón-Aquino, O. Starostenko, J. Ramírez-Cortés
Wavelet foveated compression can be used in real-time video processing frameworks for reducing the communication overhead. However, each wavelet can yields into different results on compression ratio. Classic foveation filters also applies cutoff frequencies over the region of interest (ROI). A comparative analysis has then been performed showing the different error rate for different cutoff frequency windows that preserves the ROI coefficients intact against windows that apply cutoffs over the ROI. Simulation results show that with wavelet-based foveated compression high ratio of compression can be achieved while keeping high quality over the designed ROI.
{"title":"Wavelet-Based Foveated Compression Algorithm for Real-Time Video Processing","authors":"J. Galan-Hernandez, V. Alarcón-Aquino, O. Starostenko, J. Ramírez-Cortés","doi":"10.1109/CERMA.2010.52","DOIUrl":"https://doi.org/10.1109/CERMA.2010.52","url":null,"abstract":"Wavelet foveated compression can be used in real-time video processing frameworks for reducing the communication overhead. However, each wavelet can yields into different results on compression ratio. Classic foveation filters also applies cutoff frequencies over the region of interest (ROI). A comparative analysis has then been performed showing the different error rate for different cutoff frequency windows that preserves the ROI coefficients intact against windows that apply cutoffs over the ROI. Simulation results show that with wavelet-based foveated compression high ratio of compression can be achieved while keeping high quality over the designed ROI.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"126 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124669038","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}
This paper presents the analysis and simulation of a three-phase voltage-source inverter. The inverter is driven using space vector modulation and it has a dead time of 2 ?s. During this simulation, power losses on the power electronic switches are calculated and used on a thermal model. The thermal conduction equation was solved to predict the temperature distribution. The finite element numerical method was used to solve the thermal conduction equation. A C code finite element thermal model was programmed.
{"title":"A 2D Finite Element Thermal Model of a Three-Phase-Inverter Heat Sink","authors":"R. I. Ovando, F. Ramirez, C. Hernández, M. Arjona","doi":"10.1109/CERMA.2010.141","DOIUrl":"https://doi.org/10.1109/CERMA.2010.141","url":null,"abstract":"This paper presents the analysis and simulation of a three-phase voltage-source inverter. The inverter is driven using space vector modulation and it has a dead time of 2 ?s. During this simulation, power losses on the power electronic switches are calculated and used on a thermal model. The thermal conduction equation was solved to predict the temperature distribution. The finite element numerical method was used to solve the thermal conduction equation. A C code finite element thermal model was programmed.","PeriodicalId":119218,"journal":{"name":"2010 IEEE Electronics, Robotics and Automotive Mechanics Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115612374","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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