Clustering Search
Mostrando 13-24 de 78 artigos, teses e dissertações.
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13. Aluminum-induced genes in grass species.
The toxicity caused by aluminum (Al), intrinsic to acid soils, in?uences negatively the stability of crop production. Under toxic levels of Al, plant roots paralyze their development and become unable to explore the deeper layers of the soil, affecting nutrient and water acquisition and reducing crop yield. This study aimed to identify genes associated with
INTERNATIONAL CONFERENCE OF THE BRAZILIAN ASSOCIATION FOR BIOINFORMATICS AND COMPUTATIONAL BIOLOGY. Publicado em: 2011
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14. Protein structure comparison via contact map alignment / Protein structure comparison via contact map alignment
Proteins are primary components in almost all biological processes in living organisms. It is known that the variety of protein functions is a result of the differences in protein structures. Therefore, understanding and comparing the structure of proteins is a major challenge in modern molecular biology. The structural alignment and comparison of proteins b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/02/2010
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15. Enxame de partículas aplicado ao agrupamento de textos / Enxame de partículas aplicado ao agrupamento de textos
The large number of data generated by people and organizations has stimulated the research on effective and automatic methods of knowledge extraction from databases. This dissertation proposes two new bioinspired techniques, named cPSC and oPSC, based on the Particle Swarm Optimization Algorithm (PSO) to solve data clustering problems. The proposed algorithm
Publicado em: 2010
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16. Metaheurísticas para o problema de agrupamento de dados em grafo / Metaheuristics for the graph clustering problem
Graph clustering aims at identifying highly connected groups or clusters of nodes of a graph. This problem can assume others nomenclatures, such as: graph partitioning problem and community detection problem. There are many mathematical formulations to model this problem, each one with advantages and disadvantages. Most of these formulations have the disadva
Publicado em: 2010
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17. Técnicas de visualização para sistemas de recuperação de imagens por conteúdo / Visualization techniques for content-based image retrieval
A Content-Based Image Retrieval (CBIR) system offers mechanisms needed to search and retrieve images based on visual properties such as color, texture, shape, etc. In an image search process, the presentation of results is an essential component as the retrieval of relevant images is the reason of the system existence. Consequently, the use of appropriate vi
Publicado em: 2010
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18. Métodos heurísticos para o problema de localização de concentradores / Heuristic methods for the location problem
O problema de localização de concentradores (hubs) é comumente encontrado em redes de transporte e de telecomunicação. Trata-se de problema de Otimização Combinatória NP-difícil e que ocorre em diversas situações práticas, tais como: no transporte aéreo, nos serviços de entregas postais, nos serviços de atendimento de emergência, no abastecim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2009
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19. Differential gene expression profiles of hepatocellular carcinomas associated or not with viral infection
Chronic hepatitis B (HBV) and C (HCV) virus infections are the most important factors associated with hepatocellular carcinoma (HCC), but tumor prognosis remains poor due to the lack of diagnostic biomarkers. In order to identify novel diagnostic markers and therapeutic targets, the gene expression profile associated with viral and non-viral HCC was assessed
Brazilian Journal of Medical and Biological Research. Publicado em: 06/11/2009
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20. Uma meta-heurística híbrida com busca por agrupamentos aplicada a problemas de otimização combinatória
- This thesis presents a hybrid method, denominated Clustering Search (CS), that consists of detecting dynamically promising regions in the search space based on the frequence that are sampled in these regions the solutions originated from the metaheuristic. A iterative clustering process is executed in ensembling the metaheuristic, grouping the similar solu
Publicado em: 2009
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21. Editorial
Publicado em: 2009
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22. Heuristic methods for the location problem / Métodos heurísticos para o problema de localização de concentradores
O problema de localização de concentradores (hubs) é comumente encontrado em redes de transporte e de telecomunicação. Trata-se de problema de Otimização Combinatória NP-difícil e que ocorre em diversas situações práticas, tais como: no transporte aéreo, nos serviços de entregas postais, nos serviços de atendimento de emergência, no abastecim
Publicado em: 2009
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23. ALGORITMOS PRIMAIS E DUAIS PARA O PROBLEMA DAS P-MEDIANAS / PRIMAL AND DUAL ALGORITHMS FOR THE UNCAPACITED P-MEDIAN PROBLEM
A facility is any center that offers services to a set of clients. It may be, among others, a school, a factory or a depot. Facility location problems are combinatorial optimization problems that handle decisionmaking in respect to the positioning of those services, optimizing some defined criteria. The measures often used to assess the quality of a solution
Publicado em: 2009
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24. Extensões da estatística scan espacial utilizando técnicas de otimização multi-objetivo
This work presents three new extensions of Kulldorffs Spatial Scan Statistic for the detection and inference of spatial clusters. Consider a map divided into m regions with known populations at risk and number of cases of some disease. We would like to know if the cases are randomly distributed over the m regions or not; if the cases are not randomly distrib
Publicado em: 2009