Analytic Solution
Mostrando 1-12 de 69 artigos, teses e dissertações.
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1. Analytical method for determining the saturation point of superplasticizers in cement pastes using the Marsh cone
Resumo A dosagem ótima dos aditivos superplastificantes (SP) é determinada pelo ponto de saturação do SP (PSP), obtido na pasta de cimento pela utilização do cone de Marsh. A obtenção do PSP é importante, pois define a quantidade de SP que deve ser utilizada em dosagens de concretos, quando são necessárias a redução da demanda de água e a melho
Cerâmica. Publicado em: 06/06/2019
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2. Measurement of Tannic Substances in Forest Species
ABSTRACT This study aimed to quantify the tannic content of the barks and fruit of angico-vermelho, jurema-preta and acacia-negra using skin powder as detanizador agent. Materials from these species were ground and classified, with 12.5g of air dried particles subjected to extraction using a steam jacket type extractor to obtain 1000 ml of solution, using a
Floresta Ambient.. Publicado em: 14/06/2018
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3. A Recursive Methodology to Determine the Mechanical Response of Thin Laminated Plates in Bending
ABSTRACT: The paper's objective is to present the development of a recursive methodology which is based on Adomian Decompostion Method in order to evaluate the mechanical response of thin laminated plates in linear bending. By the equivalent layer concept, the linear relation between the equivalent stresses and the strains, namely ABD matrix, is established.
J. Aerosp. Technol. Manag.. Publicado em: 2017-12
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4. An Analytical Solution for Fiber Optic Links with Photonic-Assisted Millimeter Wave Upconversion Due to MZM Nonlinearities
Abstract Photonic-assisted technique employed in the generation of stable and high-purity signals in the millimeter wave band has been investigated using dual-parallel Mach-Zehnder modulator. Indeed, this type of generation performs a high order RF multiplier, whose operation principle steams out from the nonlinear characteristic of the external modulators.
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-03
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5. DEVELOPMENT OF A SECOND TYPE ELECTRODE BASED ON THE SILVER/SILVER IBUPROFENATE PAIR FOR IBUPROFEN QUANTIFICATION IN PHARMACEUTICAL SAMPLES
Ibuprofen is a widely used pharmaceutical because of its therapeutic properties; it is considered a safe medicament, thus it does not require medical prescription to be sold. However, in order to ensure consumer's health it is indispensable that the pharmaceutical industry relies on analytic methods for its quantification. Potentiometry has proven to be a su
Quím. Nova. Publicado em: 2017-01
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6. Cómputo simbólico y gráfico: estudio del sistema masa-resorte
In this work we model and simulate the oscillating movement of a system of spring-mass by solving, symbolically and graphically, their differential equations with Maple and compare them to the analytic solution. Our purpose is to offer students a practical guide for the analysis of problems of wave nature using this program computational tool's capabilities.
Rev. Bras. Ensino Fís.. Publicado em: 16/11/2016
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7. Analytic Approach to Alloys Thermodynamics: Ternary Cu-Ga-Ni system
In this paper are presented the results of the calculation of thermodynamic properties in liquid state for ternary Cu-Ga-Ni alloys using the newest version of general solution model. Calculation was carried out in temperature interval 1473-2073 K, along 3 cross sections from corner of each metal, with ratios between two other metals 1:3, 1:1 and 3:1. Partial
Mat. Res.. Publicado em: 18/08/2016
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8. An Analytic Model for Dispersion of Rocket Exhaust Clouds: Specifications and Analysis in Different Atmospheric Stability Conditions
ABSTRACT: This paper brings the first results concerning a new analytic model to evaluate atmospheric dispersion in rocket launch scenarios, namely Generalized Integral Laplace Transform Technique for Rocket effluent dispersion model. The model is constituted by three different modules, being two pre-processors (micrometeorological parameters and deposition
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
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9. Two-parameter Rigid Block Approach to Upper Bound Analysis of Equal Channel Angular Extrusion Through a Segal 2θ-die
This article deals with a phenomenological description of experimentally determined complex geometric shape of material dead zone during Equal Channel Angular Extrusion (ECAE) through a Segal 2θ-die with a channel intersection angle of 2θ>0°and 2θ<180°. Taking into account the complex dead zone geometry in a 2θ-die, a two-parameter Rigid Block Method (
Mat. Res.. Publicado em: 2015-06
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10. Vibration of gold nano beam in context of two-temperature generalized thermoelasticity subjected to laser pulse
In the present work, the model of vibration of gold nano- beam induced by laser pulse heating is developed in the context of two-temperature generalized thermoelasticity and non-Fourier heat conduction. The analytic solution has been derived in the Laplace transform domain. The inverse Laplace transform has been calculated numerically and the numerical resul
Lat. Am. j. solids struct.. Publicado em: 2014
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11. High precise analysis of lateral vibration of quintic nonlinear beam
This article intends to achieve a new formulation of beam vibration with quintic nonlinearity, including exact expressions for the beam curvature. To attain a proper design of the beam structures, it is essential to realize how the beam vibrates in its transverse mode which in turn yields the natural frequency of the system. In this direction, new powerful a
Lat. Am. j. solids struct.. Publicado em: 2013-03
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12. Solução numérica de escoamentos de cristais líquidos nemáticos / Numerical solution of nematic liquid crystals flows
O objetivo desse trabalho é desenvolver métodos numéricos para simular escoamentos de cristais líquidos nemáticos governados pelas equações dinâmicas de Ericksen-Leslie. São apresentados dois métodos numéricos para a simulação de escoamentos de cristais líquidos nemáticos. O primeiro método foi desenvolvido para simular escoamentos tridimensi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2011