Metric Structures
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Substitution of Queens in Colony Plebeia catamarcensis (Hymenoptera : Apidae: Meliponina), and the Frequency of Caste in the Emergent Mass of cells / SUBSTITUIÇÃO DE RAINHAS EM COLÔNIAS DE PLEBEIA CATAMARCENSIS (HYMENOPTERA: APIDAE: MELIPONINA), E A FREQÜÊNCIA DE CASTAS NOS FAVOS EMERGENTES
The process of substitution of queen for Plebeia catamarcensis involves one strong attractiveness of the queen just emerged, and specify reactions of the workers, who if alternate between attacks and court the queen, the workers had still presented behaviors related to the construction and oviposition of cells in the absence of the queen. Despite this specie
Publicado em: 2008
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14. SUBSTITUIÇÃO DE RAINHAS EM COLÔNIAS DE PLEBEIA CATAMARCENSIS (HYMENOPTERA: APIDAE: MELIPONINA), E A FREQÜÊNCIA DE CASTAS NOS FAVOS EMERGENTES / Substitution of Queens in Colony Plebeia catamarcensis (Hymenoptera : Apidae: Meliponina), and the Frequency of Caste in the Emergent Mass of cells
The process of substitution of queen for Plebeia catamarcensis involves one strong attractiveness of the queen just emerged, and specify reactions of the workers, who if alternate between attacks and court the queen, the workers had still presented behaviors related to the construction and oviposition of cells in the absence of the queen. Despite this specie
Publicado em: 2008
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15. Diversidade microbiana em solos sob florestas de Araucaria angustifolia / Microbial diversity in soils under Araucaria angustifolia forests
The Ombrophilic Mixed Forest, also called Araucaria Forest, represents one of the richest remainders of subtropical pluvial forests in Brazil. Its main representative species is the endangered Araucaria angustifolia. The microbial diversity plays an important role in functioning of forest ecosystems. However, the microbial diversity in soils with araucaria f
Publicado em: 2008
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16. 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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17. Análise neurocomputacional de Antenas de microfita multibanda para sistemas de comunicação sem fio
This work presents a study of implementation procedures for multiband microstrip patch antennas characterization, using on wireless communication systems. An artificial neural network multilayer perceptron is used to locate the bands of operational frequencies of the antenna for different geometrics configurations. The antenna is projected, simulated and tes
Publicado em: 2007
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18. 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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19. Operadores binários para consulta de similaridade em banco de dados multimídia / Binary operators in multimidia data base
The present databases managers are not adequated for complex data manipulation and among them we point out the multimedia data that to speed up the query use the equality operation on the index structure. Equality operations are not much used in operations that involve complex data sence the presence of two elements extremely equal is rare. An operator class
Publicado em: 2006
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20. Models of disks and other self-gravitating structures in general relativity / Modelos de discos e outras estruturas auto-gravitantes em relatividade geral
Exact solutions of Einstein field equations that represent space-times with disklike matter distributions are constructed using the inverse method (image method). These solutions include static thin perfect uid disks with and without halos, static thin charged perfect uid disks and models of thin charged dust disks. New solutions in various coordinate system
Publicado em: 2006
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21. Metricas de Einstein em variedades bandeira / Einstein metrics on flag manifolds
The goal of this work is to contribute the study of invariant Hermitian geometry on flag manifolds. We study the class of Einstein metrics on flag manifolds. In this work we present new solutions for the invariant Einstein equation on flag manifolds, maximals or not, of Ai case. Let W a subgroup of the Weyl group. We described a natural action of W on the so
Publicado em: 2005
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22. 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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23. Aplicações harmonicas, estruturas-f, toros e superficies de Riemann nas variedades homogeneas
In this work we study the geometry of invariant f-structures and f-holomorphic curves on flag manifolds, and the construction of the equiharmonic tori on full complex flag manifolds which are not f-holomophic for any invariant f-estructure. Moreover we relate the tournament theory with the almost-complex on a flag manifolds. We compute the second variation o
Publicado em: 2002
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24. Estruturas de acumulação de água subterrânea em rochas cristalinas: estudo geofísico e geológico de casos no Estado do Rio Grande do Norte
Geological and geophysical studies (resistivity, self potential and VLF) were undertaken in the Tararaca and Santa Rita farms, respectively close to the Santo Antônio and Santa Cruz villages, eastern Rio Grande do Norte State, NE Brazil. Their aim was to characterize water acummulation structures in crystalline rocks. Based on geological and geophysical dat
Publicado em: 2000