Browsing PPG - Ciência da Computação by Issue Date
Now showing items 1-20 of 80
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Detecção de comunidades em redes por algori tmos ensemble
(Universidade Federal de São Paulo (UNIFESP), 2014-01-12)Many elements in people’s everyday life can be represented by a graph or network. Such a system can possess thousands of elements, many of which can be related to one another. Finding communities or clusters within these ...
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Uma arquitetura de referência para sistemas de processamento e análise de imagens biomédicas
(Universidade Federal de São Paulo (UNIFESP), 2014-02-27)Os sistemas CAD (Computer-aided Diagnosis) foram criados com a finalidade de auxiliar profissionais da saúde a detectar doenças precocemente e a tomar decisões no tratamento de pacientes, de modo a reduzir a taxa de erros ...
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Expansão automática de query baseada em vocabulário para busca de código
(Universidade Federal de São Paulo (UNIFESP), 2014-04-15)Modern software engineers frequently resort to code search practices to support software maintenance and evolution tasks, in particular code reuse. An issue that affects the effectiveness of code search is the vocabulary ...
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Algoritmos paralelos para determinar agrupamentos em grafos com única ou múltiplas camadas
(Universidade Federal de São Paulo (UNIFESP), 2014-04-16)Many real-world applications are naturally represented by the combinatorial structures known as graphs. The identification of highly related vertices in a graphs suggests the existence of clusters that enable a better data ...
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Seleção de atributos em problemas de classificação unária
(Universidade Federal de São Paulo (UNIFESP), 2014-04-24)In one-class classification problems all training examples belong to just one class. The absence of counter-examples represents a challenge to traditional Machine Learning and pre-processing techniques. This is the case ...
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Algoritmo genérico com chaves aleatórias viciadas para problemas de otimização em portos
(Universidade Federal de São Paulo (UNIFESP), 2014-05-30)The aim of this work is to address one of the problems that is present in the operation of many ports and that influences their efficiency: The berth allocation problem (BAP), which seeks to minimize the vessels? handling ...
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Desenvolvimento e teste de uma ferramenta de avaliação da qualidade dos dados e da confiabilidade dos voluntários para um projeto de ciência cidadã
(Universidade Federal de São Paulo (UNIFESP), 2014-08-28)Remote sensing data, satellite images mainly, are becoming more widespread due to the advancement of technologies and the way to make data available. Such data, along with remote sensing techniques are important tools to ...
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Aceleração de código por gpu em uma simulação numérica modelada por dataflow
(Universidade Federal de São Paulo (UNIFESP), 2014-08-29)In Scientific Computing, as numerical modeling for weather and climate forecast, the amount of floating-point operations to be computed is very significant, which usually has a direct impact on the elapsed time due to ...
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New frontier: um protocolo de roteamento eficiente para redes de sensores e atuadores sem fios com suporte para a comunicação atuador-atuador
(Universidade Federal de São Paulo (UNIFESP), 2014-09-05)Wireless Sensors and Actuator Networks (WSANs) is the name given to a class of wireless networks created with the aim to realize the communication between distributed applications that perform monitoring and control of ...
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Uma abordagem multiobjetiva para construção automática de algoritmos de indução de árvores de decisão
(Universidade Federal de São Paulo (UNIFESP), 2015-02-23)Decision tree induction is one of the most employed methods to extract knowledge from data, as the representation of knowledge is very intuitive and easily understandable by humans. A successful strategy for inducing ...
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Detecção de comunidades em redes complexas: uma abordagem com modelos dinâmicos
(Universidade Federal de São Paulo (UNIFESP), 2015-02-23)The late 20th century carried the rise of a new area of research named Complex Networks. Making use of the topological representation offered by graphs, complex networks are able to model agents and their eventual ...
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Análise de redes sociais um estudo do twitter
(Universidade Federal de São Paulo (UNIFESP), 2015-02-24)Until recently the study of communities of individuals, as well as their preferences and tendencies was quite restricted to small groups, since the interpersonal relationships were not easily visible. With the advent of ...
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Problema do caixeiro viajante mochileiro: formulações e métodos de soluções
(Universidade Federal de São Paulo (UNIFESP), 2015-04-28)Backpacking is a way of traveling adopted mostly by young adults who usually have limited financial resources. Moreover, this audience aims at visiting several different places in a same itinerary. In order to optimize the ...
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Intelligent guided adaptive search aplicado ao problema de localização de máxima cobertura
(Universidade Federal de São Paulo (UNIFESP), 2015-04-29)The metaheuristics have an important role in solving various optimization problems. A particular metaheuristic is widely used, the metaheuristic Greedy Randomized Adaptive Search Procedure (GRASP). Its main traits is the ...
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Matheurísticas para o problema de dimensionamento de lotes com múltiplas plantas
(Universidade Federal de São Paulo (UNIFESP), 2015-07-08)This Dissertation presents the lot sizing problem with multiple plants (factories) that produce several types of items, where every plant has a single machine. Each machine has setup time and costs, limited capacity and ...
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Técnicas para minimização do número de padrões de corte no problema de corte de estoque
(Universidade Federal de São Paulo (UNIFESP), 2015-10-27)In this work, we present an approach to the one-dimensional cutting stock problem with one type of object and also with multiple types of objects. We consider two objectives in order to obtain the final solution: minimize ...
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Multicast em redes de sensores e atuadores sem fio utilizando filtros de bloom
(Universidade Federal de São Paulo (UNIFESP), 2015-12-17)Advances in micro-scale computing power and cheaper electronic components achieved in the last decade, did emerge various types of networks, among them Wireless Sensor and Actuators Networks (WSAN). These networks consist ...
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Método híbrido com detecção de regiões promissoras baseado em densidade para o problema de localização de rótulos cartográficos
(Universidade Federal de São Paulo (UNIFESP), 2016-02-15)Metaheuristcs have been the subject of research with the aim to find those having greater efficiency for solving optimization problems. It was noted during this operation, the hybrid metaheuristics are a good choice to ...
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Uma abordagem de validação de anotações de código com transparência de localização
(Universidade Federal de São Paulo (UNIFESP), 2016-02-26)The use of metadata in software development, especially by code annotations, has emerged to complement some limitations of object-oriented programming. A recent study revealed that a lack of validation on the configured ...
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Uso de redes neurais growing neural gas para geração de protótipos
(Universidade Federal de São Paulo (UNIFESP), 2016-05-25)Instance-based algorithms, such as nearest neighbor classifiers, have been successfully employed in several practical applications. They make predictions for new data points based on the retrieval of similar examples ...
