Information Entropy
Mostrando 1-12 de 93 artigos, teses e dissertações.
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1. ECG Signals Classification Using Overlapping Variables to Detect Atrial Fibrillation
ABSTRACT In the present work a method for the detection of the cardiac pathology known as atrial fibrillation is proposed by calculating different information, statistics and other nonlinear measures over ECG signals. The original database contains records corresponding to patients who are diagnosed with this disease as well as healthy subjects. To formulate
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. Activated Complex Approach to Describe Bovine Serum Albumin-Azure A and Bovine Serum Albumin-Azure B Intermolecular Interactions
Azure A (AZA) and azure B (AZB) phenothiazine dyes are used for clinical and medical purposes, and their functions can be altered via interactions with proteins. However, no kinetics information on the interactions between phenothiazine dyes and bovine serum albumin (BSA) is available. Surface plasmon resonance was used to determine the energetic and dynamic
J. Braz. Chem. Soc.. Publicado em: 2020-12
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3. CONTEMPORARY AND FUTURE POTENTIAL GEOGRAPHIC DISTRIBUTION OF Cedrela fissilis Vell. UNDER CLIMATE CHANGE SCENARIOS
RESUMO O objetivo do presente trabalho foi modelar o nicho climático de Cedrela fissilis Vell. e realizar a projeção espacial potencial contemporânea e futura, considerando diferentes cenários de mudanças climáticas. Os dados de ocorrência da espécie foram obtidos a partir do banco de dados do SpeciesLink e GBIF. Os dados de altitude e 19 variáveis
Rev. Árvore. Publicado em: 25/11/2019
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4. Analysis of the fluviometric network of Rio das Velhas using Entropy
RESUMO Neste trabalho foi realizado um estudo comparativo, onde foram empregados diferentes métodos disponíveis na literatura que buscam avaliar a quantidade de estações e a qualidade da informação gerada pela rede hidrométrica de uma bacia hidrográfica, utilizando conceitos da Teoria da Informação. A ideia subjacente é a da chamada rede ótima, c
RBRH. Publicado em: 17/10/2019
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5. DELINEATION OF HOMOGENEOUS ZONES BASED ON GEOSTATISTICAL MODELS ROBUST TO OUTLIERS
RESUMO Diversas pesquisas utilizam medidas de condutividade elétrica aparente do solo (CEa) como indicador da variabilidade espacial de atributos físico-químicos existentes no campo de produção. Com base nestas medidas, zonas de manejo (ZM) são delineadas para aperfeiçoamento da gestão agrícola. Entretanto, estas amostras têm apresentado presença
Rev. Caatinga. Publicado em: 18/07/2019
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6. Mean scatterer space estimation from ultrasound signals combining singular spectral analysis and entropy
AbstractIntroduction: Ultrasound (US) is a nonionizing radiation capable of real time imaging at low cost. Its most attractive application is quantitative tissue characterization with the objective of differentiating normal tissues from diseased tissues. In this study, an automated method using singular spectrum analysis (SSA) to estimate the mean scatterer
Res. Biomed. Eng.. Publicado em: 2018-06
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7. Recurrence Plots: a New Tool for Quantification of Cardiac Autonomic Nervous System Recovery after Transplant
Abstract Objective: To evaluate a possible evolutionary post-heart transplant return of autonomic function using quantitative and qualitative information from recurrence plots. Methods: Using electrocardiography, 102 RR tachograms of 45 patients (64.4% male) who underwent heart transplantation and that were available in the database were analyzed at differ
Braz. J. Cardiovasc. Surg.. Publicado em: 2017-08
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8. Análisis geográfico y conservación del zorro andino Lycalopex culpaeus (Mammalia, Canidae) en Colombia
Abstract The Andean fox Lycalopex culpaeus (Molina, 1782) has been included in the category of threat Vulnerable in Colombia, however, there are not available studies that support at the national level the inclusion of this species in that category. In this work, we delimited the distribution area and we discuss the category of threat of the species in Colom
Iheringia, Sér. Zool.. Publicado em: 01/08/2016
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9. Online hybrid modeling method with application for predicting Bauxite production indicators
Abstract In the bauxite flotation process, concentrate grade and tailings grade are key production indicators; however, they are difficult to measure online. It is also difficult to develop an effective mathematical model for the process because of the complex non-linear and uncertain relationship among the feed parameters (feed grade, pulp density, slurry p
Rem: Rev. Esc. Minas. Publicado em: 2015-12
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10. CREDIT SCORING MODELING WITH STATE-DEPENDENT SAMPLE SELECTION: A COMPARISON STUDY WITH THE USUAL LOGISTIC MODELING
Statistical methods have been widely employed to assess the capabilities of credit scoring classification models in order to reduce the risk of wrong decisions when granting credit facilities to clients. The predictive quality of a classification model can be evaluated based on measures such as sensitivity, specificity, predictive values, accuracy, correlati
Pesqui. Oper.. Publicado em: 2015-04
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11. Automatic pain quantification using autonomic parameters
The objective measurement of subjective, multi-dimensionally experienced pain is a problem for which there has not been an adequate solution. Although verbal methods (e.g., pain scales and questionnaires) are commonly used to measure clinical pain, they tend to lack objectivity, reliability, or validity when applied to mentally impaired individuals. Biopoten
Psychol. Neurosci.. Publicado em: 2014-12
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12. Epidemiologia dos subtipos de depressão: análise de classes latentes dos sintomas depressivos em uma amostra populacional da região Metropolitana de São Paulo / Epidemiology of subtypes of depression: latent class analysis of depressive symptoms in a population-based sample of São Paulo Metropolitan Area
Introduction. Depression is a heterogeneous clinical syndrome characterized by distinct symptom profiles. However, few studies have investigated depressive subtypes in the community and their sociodemographic and clinical correlates, differentiating them on the presentation according to gender. Methods. Data comes from the São Paulo Megacity Mental Health S
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012