Metric Access Methods
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Exploring concepts of metric space theory in similarity queries over complex data / Explorando conceitos da teoria de espaços métricos em consultas por similaridade sobre dados complexos
Estruturas de indexação para domínios métricos são úteis para agilizar consultas por similaridade sobre dados complexos, tais como imagens, onde o custo computacional da comparação de dois itens de dados geralmente é alto. O estado da arte para executar consultas por similaridade está centrado na utilização dos chamados "Métodos de Acesso Métri
Publicado em: 2010
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2. Treatment of time and dynamics in dta represented in metric spaces / Tratamento de tempo e dinamicidade em dados representados em espaços métricos
Nowadays, the Database Management Systems (DBMS) must be able to manage complex data, such as multimedia data, genetic sequences, temporal series, besides the traditional data. For queries on large collections of complex data, the similarity among elements is the most relevant concept, and it can be adequately expressed when data are represented in metric sp
Publicado em: 2009
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3. Bulk-loading Dynamic Metric Acess Methods / Operação de carga-rápida (bulk-loading) em métodos de acesso métricos
The similarity degree between data elements is the primordial factor for information retrieval in databases that handle complex data, such as genetic sequences, time series and multimedia objects (long images, audio, videos, texts). To answer these queries in a reduced time, it is necessary methods that use metrics to evaluate the similarity between elements
Publicado em: 2007
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4. DBM-Tree: trading height-balancing for performance in metric access methods
Metric Access Methods (MAM) are employed to accelerate the processing of similarity queries, such as the range and the k-nearest neighbor queries. Current methods, such as the Slim-tree and the M-tree, improve the query performance minimizing the number of disk accesses, keeping a constant height of the structures stored on disks (height-balanced trees). How
Journal of the Brazilian Computer Society. Publicado em: 2006-04
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5. Indexing complex data in Generic Metric Domains. / Indexação de dados em domínios métricos generalizáveis
The DBMS were developed to manipulate data in numeric domains and short strings, not considering the manipulation of complex data, like multimidia data. The operators em data domain which requests for the total order property have no use to handle complex data. An operator class that fit well to handle this type of data are the similarity operators: range qu
Publicado em: 2005
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6. Efficient algorithms to execute complex similarity queries in RDBMS
Search operations in large sets of complex objects usually rely on similarity-based criteria, due to the lack of other general properties that could be used to compare the objects, such as the total order relationship, or even the equality relationship between pairs of objects, commonly used with data in numeric or short texts domains. Therefore, similarity
Journal of the Brazilian Computer Society. Publicado em: 2004-04
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7. Visualizing the organization and behavior of metric access methods: Applications in similarity queries / "Visualizando a organização e o comportamento de estruturas métricas: aplicações em consultas por similaridade"
The use of computers by an increasing variety of applications led the Database Management Systems (DBMS) to be used to store a wide range of complex data types, such as images, sounds, DNA chains, etc. Queries based on the total order relationship and/or equality can not be applied or have a limited range of applications when performed over these datasets. I
Publicado em: 2004
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8. A pratical and eficient approach of searches for similarity to support diagnose by images. / Uma abordagem prática e eficiente de consultas por similaridade para suporte a diagnóstico por imagens.
This works presents the main characteristics of a diagnosis support system based on image similarity search for medical applications. This system was developed to be used in the Clinical Hospital of Ribeirao Preto of the University of Sao Paulo. The content-based image retrieval (CBIR) researching area has evolved greatly in the last years. Thus, a CBIR syst
Publicado em: 2002