Feature Vector
Mostrando 25-36 de 95 artigos, teses e dissertações.
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25. Segmentação de tumores de encéfalo em imagens por ressonância magnética baseada em informações texturais. / Brain tumor segmentation in magnetic resonance images based on texture information.
Magnetic resonance images are essential in the diagnosing and treatment of brain tumors due to its high amount of anatomic details. The task of segmenting brain tumor regions in these images makes more exact quantitative analysis feasible, allowing a better tracking of the evolution/regression of the disease. Nevertheless, the execution of such task is burde
Publicado em: 2009
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26. Fenologia, ecologia da polinizaÃÃo e reproduÃÃo de espÃcies de manguezal, no municÃpio de Goiana - PE
The mangal is a tropical ecosystem of the coastal and estuarine areas, and it is important to shelter the marine animals and for its reproduction, beside promote the increase of productivity of neighbor community. Its vegetation, the mangrove, is composed of a few species with proper feature, such as viviparity and aerial roots associated with breath. There
Publicado em: 2009
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27. Uma casa para Clarice : proposta para criaÃÃo de um Museu Interativo para a cidade do Recife, 2009
Based on the analysis of the Public Cultural Policy of the Town Hall of the City of Recife for the period from 2009 to 2019, which is still in the final stage of drafting, and the promulgation of which has already been announced for May of this year, the core of this dissertation is to put forward the proposal for creating an interactive museum for Clarice L
Publicado em: 2009
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28. Oscilador de Dirac: ImplicaÃÃes da violaÃÃo da simetria de Lorentz e da massa dependente da posiÃÃo.
In this work we study the Dirac Oscillator (DO) in a threefold way. In the first way, we study DO with Lorentz symmetry violation. This violation is implemented through vectorial and an axial terms. We realize a non-relativistic limit and we obtain that the background vector field does not modify the energy spectrum. However, in the case of the background ax
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/07/2008
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29. A machine learning approach to automatic music genre classification
This paper presents a non-conventional approach for the automatic music genre classification problem. The proposed approach uses multiple feature vectors and a pattern recognition ensemble approach, according to space and time decomposition schemes. Despite being music genre classification a multi-class problem, we accomplish the task using a set of binary c
Journal of the Brazilian Computer Society. Publicado em: 2008-09
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30. Análise da influência de funções de distância para o processamento de consultas por similaridade em recuperação de imagens por conteúdo / Analysis of the influence of distance functions to answer similarity queries in content-based image retrieval.
The retrieval of images by visual content relies on a feature extractor to provide the most meaningful intrinsic characteristics (features) from the data, and a distance function to quantify the similarity between them. A challenge in this field supporting content-based image retrieval (CBIR) to answer similarity queries is how to best integrate these two ke
Publicado em: 2008
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31. Statistical learning approaches for discriminant features selection
Supervised statistical learning covers important models like Support Vector Machines (SVM) and Linear Discriminant Analysis (LDA). In this paper we describe the idea of using the discriminant weights given by SVM and LDA separating hyperplanes to select the most discriminant features to separate sample groups. Our method, called here as Discriminant Feature
Journal of the Brazilian Computer Society. Publicado em: 2008
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32. Construção de evidências para classificação automática de textos
Since the popularization of digital documents, automatic text classification is considered an important research topic. Despite the research efforts, there is still a demand for improving the performance of classifiers. Most of the research in automatic text classification focus on the algorithmic side, but there are few efforts focused on enhancing the data
Publicado em: 2008
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33. Spermatogenesis and nucleolar activity in Triatoma klugi (triatomine, Heteroptera)
Triatoma klugi is a Chagas disease vector in the Rio Grande do Sul State. Triatominae chromosomes are holocentric and sex chromosomes segregation is post-reductional. In this paper we describe the karyotype of male T. klugi and a meiotic analysis including the nucleolar behavior during spermatogenesis. Testis cells were analyzed after lacto-acetic orcein and
Genetics and Molecular Biology. Publicado em: 2008
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34. Análise e classificação de imagens de lesões da pele por atributos de cor, forma e textura utilizando máquina de vetor de suporte
O câncer de pele é o mais comum de todos os cânceres e o aumento da sua incidência deve-se, em parte, ao comportamento das pessoas em relação à exposição ao sol. No Brasil, o câncer de pele não melanoma é o mais incidente na maioria das regiões. A dermatoscopia e ideodermatoscopia são os principais tipos de exames para o diagnóstico de doença
Publicado em: 2008
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35. Analysis of the Clustering Algorithms for the Databases / Análise de Algoritmos de Agrupamento para Base de Dados Textuais
The increasing amount of digitally stored texts makes necessary the development of computational tools to allow the access of information and knowledge in an efficient and efficacious manner. This problem is extremely relevant in biomedicine research, since most of the generated knowledge is translated into scientific articles and it is necessary to have the
Publicado em: 2008
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36. Detect of scratches in spherical lenses, for light reflected under Fourier descriptors / Detecção de riscos em lentes esféricas, por luz refletida, através de descritores de Fourier
This work presents a methodology for inspection of spherical organic ophthalmic lenses during the polishing process. The methodology encompasses the capture of an ultraviolet image of the lens under inspection by a CCD video camera and associated processing of the image to discriminate between scratches on the lens and artifacts that can appear on the image.
Publicado em: 2007