Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42895
Sandro Chagas, M. Eisencraft, M. Lima
The electroencephalogram (EEG) is a complex and aperiodic time series, which is a sum over a very large number of neuronal membrane potentials. Despite the rapid advances of neuroimaging techniques, EEG recording con- tinues playing an important role in both the diagnosis of neurological diseases and understanding of the psychological process. In order to extract relevant information of brain electrical activity, a variety of computerized-analysis me- thods have been used. In this paper, we propose the use of a recently developed machine-leaning technique - relevance vector machine (RVM) - for EEG signals classification. RVM is based on Bayesian estimation theory, which has as distinctive feature the fact that it can yield a sparse decision function defined only by a very small number of so-called re- levance vectors. From the experimental results, we can see that estimation and classification based on RVM perform well in EEG signals classification problem compared with traditional approach support vector machine (SVM), which indicates that this classification method is valid and has promising application.
{"title":"Relevance Vector Machine Applied to EEG Signals Classification","authors":"Sandro Chagas, M. Eisencraft, M. Lima","doi":"10.14209/sbrt.2008.42895","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42895","url":null,"abstract":"The electroencephalogram (EEG) is a complex and aperiodic time series, which is a sum over a very large number of neuronal membrane potentials. Despite the rapid advances of neuroimaging techniques, EEG recording con- tinues playing an important role in both the diagnosis of neurological diseases and understanding of the psychological process. In order to extract relevant information of brain electrical activity, a variety of computerized-analysis me- thods have been used. In this paper, we propose the use of a recently developed machine-leaning technique - relevance vector machine (RVM) - for EEG signals classification. RVM is based on Bayesian estimation theory, which has as distinctive feature the fact that it can yield a sparse decision function defined only by a very small number of so-called re- levance vectors. From the experimental results, we can see that estimation and classification based on RVM perform well in EEG signals classification problem compared with traditional approach support vector machine (SVM), which indicates that this classification method is valid and has promising application.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"90 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132484397","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 : 1900-01-01DOI: 10.14209/sbrt.2008.42860
C. Macapuna, E. Medeiros, A. Klautau
— This work presents BrDSLWizard, a software to obtain and monitor DSL modems, including the evaluation of the operating margin . Margin fluctuations indicate chan-ges in the condition of the DSL channel, such as increase of the crosstalk interference. BrDSLWizard provides means to obtain and statistically analyze margin data, which is useful for evaluating practical aspects of operating DSL networks.
{"title":"A Software for Evaluating the Operating Margin of DSL Modems","authors":"C. Macapuna, E. Medeiros, A. Klautau","doi":"10.14209/sbrt.2008.42860","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42860","url":null,"abstract":"— This work presents BrDSLWizard, a software to obtain and monitor DSL modems, including the evaluation of the operating margin . Margin fluctuations indicate chan-ges in the condition of the DSL channel, such as increase of the crosstalk interference. BrDSLWizard provides means to obtain and statistically analyze margin data, which is useful for evaluating practical aspects of operating DSL networks.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133354237","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 : 1900-01-01DOI: 10.14209/sbrt.2008.43074
Zaqueu Cabral Pereira, R. D. Souza, M. Pellenz
—An unequal error protection scheme for LZSS compressed data is proposed. The novel method divides the compressed data into short blocks, what allows for near real time operation. The error protection is obtained through the application of BCH codes and block interleavers. Compared to other methods found in the literature, the proposed scheme is either more efficiency in terms of compression ratio or in terms of decoding delay.
{"title":"Proteção Desigual de Erros usando Códigos BCH para Dados Compactados com LZSS","authors":"Zaqueu Cabral Pereira, R. D. Souza, M. Pellenz","doi":"10.14209/sbrt.2008.43074","DOIUrl":"https://doi.org/10.14209/sbrt.2008.43074","url":null,"abstract":"—An unequal error protection scheme for LZSS compressed data is proposed. The novel method divides the compressed data into short blocks, what allows for near real time operation. The error protection is obtained through the application of BCH codes and block interleavers. Compared to other methods found in the literature, the proposed scheme is either more efficiency in terms of compression ratio or in terms of decoding delay.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127774265","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 : 1900-01-01DOI: 10.14209/sbrt.2008.42725
Laila Marzall, Delx Lunardi, J. C. D. S. Lacava
{"title":"Rede de Antenas E Circularmente Polarizada","authors":"Laila Marzall, Delx Lunardi, J. C. D. S. Lacava","doi":"10.14209/sbrt.2008.42725","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42725","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132400090","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 : 1900-01-01DOI: 10.14209/sbrt.2008.42868
L. Ling, D. Brito, Jennifer Chuin Lee
- This paper presents an algorithm for fast localization of iris image, increasing the performance of iris biometric recognition systems by reducing the processing time during the phase of iris image segmentation.
{"title":"Um método robusto de segmentação de imagem de íris","authors":"L. Ling, D. Brito, Jennifer Chuin Lee","doi":"10.14209/sbrt.2008.42868","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42868","url":null,"abstract":"- This paper presents an algorithm for fast localization of iris image, increasing the performance of iris biometric recognition systems by reducing the processing time during the phase of iris image segmentation.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117022511","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 : 1900-01-01DOI: 10.14209/sbrt.2008.43132
A. Cavalcante, M. Sousa, Joao W. Costa, Gervásio P. S. Cavalcanti
{"title":"3D Ray-Tracing Parallel Propagation Model for MIMO Systems and Multi-Floor Scenarios","authors":"A. Cavalcante, M. Sousa, Joao W. Costa, Gervásio P. S. Cavalcanti","doi":"10.14209/sbrt.2008.43132","DOIUrl":"https://doi.org/10.14209/sbrt.2008.43132","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129432946","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 : 1900-01-01DOI: 10.14209/sbrt.2008.43173
R. Cruz, Tarcílio Cavalcanti da Silva, P. Silva, Adaildo D´Assunção
{"title":"Caracterização de Filtros em Linhas de Microfita com Planos de Terra Fractais","authors":"R. Cruz, Tarcílio Cavalcanti da Silva, P. Silva, Adaildo D´Assunção","doi":"10.14209/sbrt.2008.43173","DOIUrl":"https://doi.org/10.14209/sbrt.2008.43173","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129481013","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 : 1900-01-01DOI: 10.14209/sbrt.2008.42400
S. Oliveira, Shusaburo Motoyama
{"title":"Um Protocolo MAC para Redes de Sensores sem Fio Voltado para Aplicações Específicas Utilizando o Método de Acesso TDMA","authors":"S. Oliveira, Shusaburo Motoyama","doi":"10.14209/sbrt.2008.42400","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42400","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"10 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115244186","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：