منابع مشابه
Construção de Mapa de Tópicos Semânticos Baseado na Integração de Fontes Heterogêneas
Nowadays one of the main challenges in the area of Information Retrieval (IR) is the development of systems that process correctly the idea or concept behind the queries issued by users. Conventional IR systems usually limit their indexing and retrieval capabilities to keywords, which creates poor results when indexing terms that are not listed in the query. Queries such as: “The king of Brazil...
متن کاملProcessamento de consultas na Web de Dados: uma abordagem para busca de fontes de dados relevantes
The adoption of Linked Data principles has contributed towards the creation of a Web of Data, allowing the development of applications and tools which run queries over available information. One of the main challenges for the query processing over the Web is the selection of relevant sources, i.e., sources which could contribute significantly to the result of a query. In this paper, we discuss ...
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Nowadays, a massive volume of data has been produced by a variety of data sources. The easy access to these data presents new opportunities. In this sense, choosing the most suitable data sources for a specific use has become a challenge. The literature contains many works that perform quality assessment in data sources as a mean of solving this issue. However, only few works take into account ...
متن کاملEstimação de Probabilidade de Perda de Dados em Redes Através de Modelagem Multifractal de Tráfego e Teoria de Muitas Fontes
In this paper, we propose an approach to estimate the byte loss probability in computer network links considering multifractal properties of traffic flows. More specifically, we obtain a mathematical expression for the loss probability for finite buffer servers fed by multifractal traffic flows. The proposed approach is based on the Many Sources theory and on the multiplicative cascade based mu...
متن کاملSobre separação cega de fontes: proposições e analise de estrategias para processamento multi-usuario
This thesis is devoted to study blind source separation techniques applied to multiuser processing in digital communications. Using probability density function (pdf) estimation strategies, two multiuser processing methods are proposed. They aim for recovering transmitted signal by using the Kullback-Leibler similarity measure between the signals pdf and a parametric model that contains the sig...
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ژورنال
عنوان ژورنال: Discurso
سال: 1983
ISSN: 2318-8863,0103-328X
DOI: 10.11606/issn.2318-8863.discurso.1983.37903