Approximation
Mostrando 1-12 de 1264 artigos, teses e dissertações.
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1. MGF Methods for Fixed and Gain Saturated Optically Preamplified FSO Links Impaired by Misalignments and Atmospheric Turbulence
Abstract The Gaussian approximation is commonly used to evaluate the performance of free space optical communication systems. However, other performance evaluation methods such as the saddle point approximation, Chernoff bound and the modified Chernoff bound have also been used. This paper investigates the performance of fixed and gain saturated optically pr
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Universal Approximators: New Approach for the Curve Fit of the COVID-19 Infected Population
ABSTRACT Fuzzy systems that include Takagi-Sugeno inference method with linear outputs, are widely known to have the ability to uniformly approximate any polynomial with high precision and, as a consequence, any continuous function, by applying the approximation theorem of Weierstrass. There is one more advantage for these methods which is to obtain an expli
Trends in Computational and Applied Mathematics. Publicado em: 2022
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3. Comparative Study of Some Numerical Schemes for a Fractional Order Model of HIV Infection Treatment
ABSTRACT A fractional order mathematical model that already exists in the literature, was considered. This model was established to study the effects of medicinal treatment in people infected with the human immunodeficiency virus (HIV). The importance of this study is that the model evaluates, among other parameters, the density of healthy and HIV-infected C
Trends in Computational and Applied Mathematics. Publicado em: 2022
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4. Factor structure of the Dimensional Yale-Brown Obsessive-Compulsive Scale in a large sample of adults with obsessive-compulsive disorder
Objectives: Although the Dimensional Yale-Brown Obsessive-Compulsive Scale (DY-BOCS) is a widely used instrument for assessing different obsessive-compulsive symptom dimensions, its factor structure has never been studied in a Brazilian population. Thus, we aimed to assess the goodness-of-fit indexes and factor loadings of two higher-order models of the DY-B
Brazilian Journal of Psychiatry. Publicado em: 2022
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5. Evaluation of the Current in the Cell Membrane for Numerical Simulations of Electroporation
Abstract This study presents a rigorous numerical analysis of the current in the cell membrane, subjected to a uniform electric field, and its impact in the pore formation. The numerical model considers a single cell composed of uniform membrane and cytoplasm, in a suspension medium. The current in the cell membrane is calculated using two different approach
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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6. Consumptive water use of banana under micro irrigation using a soil-water balance approximation
RESUMO A cobertura do solo contribui para a manutenção do teor de água do solo em níveis razoáveis para o crescimento da cultura. E influi na demanda hídrica da cultura e tempo de irrigação. O objetivo deste estudo foi estimar a evapotranspiração e a absorção de água radicular pela cultivar de bananeira ‘BRS Princesa’ através de uma abordag
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2022
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7. The Baecke Habitual Physical Activity Questionnaire (BHPAQ): a valid internal structure of the instrument to assess healthy Brazilian adults
SUMMARY OBJECTIVE: This study aimed to validate the internal structure of the Brazilian version of the Baecke Habitual Physical Activity Questionnaire. METHODS: A cross-sectional study was conducted with individuals over 18 years old of both sexes, with Brazilian Portuguese as their native language. The structure of the Baecke Habitual Physical Activity Qu
Revista da Associação Médica Brasileira. Publicado em: 2022
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8. Parenting practices during early childhood: validity evidence of a Brazilian scale
Abstract Objective: The present study aims to analyze the validity of evidence and internal consistency of an inventory for assessing parenting practices during early childhood. Method: Participants were 857 mothers of one-to-42-months children recruited in three cities in the Southeast region and one city in the Midwest region of Brazil. The participants
Jornal de Pediatria. Publicado em: 2022
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9. Mortality from Cardiovascular Diseases: A Comparative Analysis between the Medical and Non-Medical Populations in Brazil
Abstract Background: Cardiovascular disease (CVD) is the leading cause of death worldwide, including among physicians. Professional peculiarities increase cardiovascular risk in this population, making it relevant to analyze mortality in the medical population (MPop) and non-medical population (NMPop). Objectives: To compare the CVD mortality coefficient (
International Journal of Cardiovascular Sciences. Publicado em: 2022
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10. Comorbidity of psychiatric and dermatologic disorders with skin picking disorder and validation of the Skin Picking Scale Revised for Brazilian Portuguese
Objective: Skin picking disorder (SPD) affects up to 5.4% of the population. Less than half of patients are correctly diagnosed and treated. Developing tools to recognize SPD can help professionals and patients alike. This trial aimed to validate the Skin Picking Scale-Revised (SPS-R) for the Brazilian population and assess the psychiatric and dermatological
Brazilian Journal of Psychiatry. Publicado em: 2022
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11. A Novel In Silico Monte Carlo Approach to Optimize a PSD Estimation Problem. Generation of Data Fusion Experiment Rules
ABSTRACT This article analyzes the performance of combining information from Scanning Electron Microscopy (SEM) micrographs with Static Light Scattering (SLS) measurements for retrieving the so-called Particle Size Distribution (PSD) in terms of experimental features. The corresponding data fusion is implemented using a novel Monte Carlo-based method consist
Trends in Computational and Applied Mathematics. Publicado em: 2022
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12. Stressful life events and hopelessness in adults: the mediating role of mentalization and emotional dysregulation
Objective: Hopelessness is considered a risk factor for several mental and behavioral disorders. Research has shown that a stressful life event can be a significant predictor of hopelessness. The aim of the current research study was to explore the relationship between stressful life events and hopelessness, as well as to analyses the mediation effect of bo
Braz. J. Psychiatry. Publicado em: 2021-08