Transformation Mathematical
Mostrando 1-12 de 74 artigos, teses e dissertações.
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1. A SBEM e a Produção de Conhecimento em Educação Matemática
Resumo Em finais dos anos de 1980, com a criação da SBEM (Sociedade Brasileira da Educação Matemática), ampliou-se o espaço científico da Educação Matemática de novos tempos, tempos de declínio da Matemática moderna e de avanços tecnológicos, sobretudo tempos de questionamentos de saberes profissionais dos professores que ensinam Matemática. N
Bolema. Publicado em: 02/12/2019
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2. Sraffa and the Labour Theory of Value: a note
RESUMO O autor procura demonstrar que o sistema de preços proposto por Piero Sraffa na sua obra Produção de Mercadorias por meio de Mercadorias - Prelúdio a uma crítica da Teoria Econômica é compatível com teoria do valor-trabalho incorporado de David Ricardo e de Karl Marx e com a teoria do valor-trabalho comandado de Adam Smith. Na realidade, a med
Brazil. J. Polit. Econ.. Publicado em: 17/10/2019
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3. Desdoblamiento de la transformación martensítica en un acero F82H de activación neutrónica reducida
ABSTRACT One of the most promising solutions to global energy supply is nuclear fusion. This process, which is implemented in nuclear fusion reactors (from which one of the first designs was the Tokamak), involves deuterium-tritium plasmas at very high temperature, confined in vacuum chambers of toroidal shape under the influence of strong magnetic fields. T
Matéria (Rio J.). Publicado em: 19/07/2018
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4. An Experimental Study of the Solidification Thermal Parameters Influence upon Microstructure and Mechanical Properties of Al-Si-Cu Alloys
Metals solidification involves the transformation of the molten metal back into the solid state. Solidification structures impact heavily on the final product's characteristics. The microstructure effects on metallic alloys properties have been highlighted in various studies and particularly the dendrite arm spacing influence upon the mechanical properties s
Mat. Res.. Publicado em: 18/06/2018
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5. Autocatalysis, Entropic Aspects and the Martensite Transformation Curve in Iron-Base Alloys
This study advances a methodology that consolidates the description of time-dependent (isothermal) as well as time-independent (athermal) martensitic transformation curves. Our model is applied in an extended 3-space, thus permitting inclusion of the effects of autocatalysis on nucleation to be distinguished from the initiation of the transformation, as infl
Mat. Res.. Publicado em: 09/01/2017
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6. Mathematical Description of a Flexible Connection of Links and its Applications in Modeling the Joints of Spatial Linkage Mechanisms
Abstract The general mathematical model of a flexible connection of links by means of spring-damping elements is presented in the paper. The formalism of homogeneous transformation matrices is used to derive formulas for the energy of spring deformation and the Rayleigh dissipation function of the spring-damping elements. The formulas have convenient forms t
Lat. Am. j. solids struct.. Publicado em: 2016-12
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7. Enzyme kinetic modelling and analytical solution of nonlinear rate equation in the transformation of D-methionine into L-methionine in batch reactor using the new homotopy perturbation method
A mathematical model of biotransformation of D-methionine into L-methionine in the cascade of the enzymes such as, D-amino acid oxidase (D-AAO), L-phenylalanine dehydrogenase (L-PheDH) and formate dehydrogenase (FDH) is discussed. The model is based on a system of coupled nonlinear reaction equations under non steady-state conditions for biochemical reaction
Quím. Nova. Publicado em: 2016-12
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8. A simple approach to calculate active power of electrosurgical units
Abstract Introduction: Despite of more than a hundred years of electrosurgery, only a few electrosurgical equipment manufacturers have developed methods to regulate the active power delivered to the patient, usually around an arbitrary setpoint. In fact, no manufacturer has a method to measure the active power actually delivered to the load. Measuring the d
Res. Biomed. Eng.. Publicado em: 05/02/2016
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9. Dynamic analysis and vibration control of a multi-body system using MSC Adams
AbstractIn this paper, modelling and simulation of a multi-body system for its vibration control using sensors and actuators is presented. The model developed on MSC ADAMS consists of six legs connecting moving and base plates using spherical joints with axial rotation of legs constrained. It contains linear actuator collocated with force sensor. Mathematica
Lat. Am. j. solids struct.. Publicado em: 2015-08
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10. Modelagem estatística de extremos espaciais com base em processos max-stable aplicados a dados meteorológicos no estado do Paraná / Statistical modelling of spatial extremes based on max-stable processes applied to environmental data in the Parana State
The most mathematical models developed for rare events are based on probabilistic models for extremes. Although the tools for statistical modeling of univariate and multivariate extremes are well-developed, the extension of these tools to model spatial extremes data is currently a very active area of research. Modeling of maximum values under the spatial dom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2012
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11. PRODUÇÃO DE TOMATEIRO CULTIVADO COM ACRESCENT SOLUS / YELD OF TOMATO CULTIVATED WITH ACRESCENT SOLUS
Os objetivos deste estudo foram: verificar o atendimento às pressuposições do modelo matemático e, identificar transformações de dados para variáveis produtivas e morfológicas de tomateiro em experimentos em túnel plástico e em campo, considerando cada data de colheita e colheitas agrupadas na primavera-verão e outono-inverno; e, avaliar o efeito
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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12. Reconhecimento de PadrÃes AtravÃs de AnÃlises EstatÃsticas e Fractais Aplicadas a Dados de Ensaios NÃo-Destrutivos / Pattern Recognition by Statistical Fluctuation and Fractal Analyses Applied to Nondestructive Testing Data
In this work a procedure is studied for pattern classification related to different types of data, namely: (1) signals obtained from ultrasonic testing ( pulse-echo technique) and magnetic signals obtained from BarkhÃusen noise in samples of ferritic-pearlitic carbon steel tubes which, due to temperature effects, have shown microstructural changes as conseq
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011