Sequence Of Bits
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Codificação de vídeo baseada em fractais e representações esparsas / Video coding based on fractals and sparse representations
A video is a sequence of still images representing scenes in motion. A video is a sequence of extremely similar images separated by abrupt changes in their content. If these images were transmitted and stored without any kind of preprocessing, this would require a massive amount of storage space and communication channels with very high bandwidths. Lossy com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
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2. COMPRESSION OF NATURAL NUMBERS, SEQUENCE OF BITS AND GRAPHS / COMPRESSÃO DE NÚMEROS NATURAIS, SEQUÊNCIA DE BITS E GRAFOS
Esta tese aborda os problemas de compressão para os seguintes tipos de dados: sequência de bits e grafos web. Para o problema de compressão de sequência de bits, demonstramos a relação entre algoritmos de intercalação e codificadores de fonte binária. Em seguida, mostramos que os algoritmos de intercalação binária (Hwang e Lin, 1972), recursivo (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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3. Uma metodologia para caracterizaÃÃo de trÃfego de vÃdio baseada nos momentos e primeira e segunda ordem
This thesis presents a new methodology for video traffic characterization. A set of states are defined by a classification algorithm based on the first and second order moments of the codified video sequences. Modulation processes and time series generation that possess statistics associated with the states, defined by the classification algorithm considered
Publicado em: 2004
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4. Algoritmo de casamento de padrões aplicado na estimação de movimento em compressão de video
With the application of motion estimation and compensation techniques in video sequences, we can reduce the number of bits needed to encode the video sequence and to increase the quality of the reconstructed video signal. On the other hand, the high computational cost of the process demands high performance of the encoder. This thesis proposes a new motion e
Publicado em: 2003
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5. The Shannon information entropy of protein sequences.
A comprehensive data base is analyzed to determine the Shannon information content of a protein sequence. This information entropy is estimated by three methods: a k-tuplet analysis, a generalized Zipf analysis, and a "Chou-Fasman gambler." The k-tuplet analysis is a "letter" analysis, based on conditional sequence probabilities. The generalized Zipf analysi
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6. WebLogo: A Sequence Logo Generator
WebLogo generates sequence logos, graphical representations of the patterns within a multiple sequence alignment. Sequence logos provide a richer and more precise description of sequence similarity than consensus sequences and can rapidly reveal significant features of the alignment otherwise difficult to perceive. Each logo consists of stacks of letters, on
Cold Spring Harbor Laboratory Press.
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7. Sequence logos: a new way to display consensus sequences.
A graphical method is presented for displaying the patterns in a set of aligned sequences. The characters representing the sequence are stacked on top of each other for each position in the aligned sequences. The height of each letter is made proportional to its frequency, and the letters are sorted so the most common one is on top. The height of the entire
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8. Strong minor groove base conservation in sequence logos implies DNA distortion or base flipping during replication and transcription initiation
The sequence logo for DNA binding sites of the bacteriophage P1 replication protein RepA shows unusually high sequence conservation (∼2 bits) at a minor groove that faces RepA. However, B-form DNA can support only 1 bit of sequence conservation via contacts into the minor groove. The high conservation in RepA sites therefore implies a distorted DNA helix w
Oxford University Press.
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9. Epigenetic randomness, complexity and singularity of human iris patterns.
We investigated the randomness and uniqueness of human iris patterns by mathematically comparing 2.3 million different pairs of eye images. The phase structure of each iris pattern was extracted by demodulation with quadrature wavelets spanning several scales of analysis. The resulting distribution of phase sequence variation among different eyes was precise
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10. Demonstration of a word design strategy for DNA computing on surfaces.
A strategy for DNA computing on surfaces using linked sets of 'DNA words' that are short oligonucleotides (16mers) is proposed. The 16mer words have the format 5'-FFFFvvvvvvvvFFFF-3' in which 4-8 bits of data are stored in 8 variable ('v') base locations, and the remaining fixed ('F') base locations are used as a word label. Using a template and map strategy