Trigonometric Functions
Mostrando 1-12 de 19 artigos, teses e dissertações.
-
1. Proposta de uma Abordagem Iterativa Analítica para o Oscilador Harmônico Simples
Resumo Neste trabalho propusemos uma abordagem iterativa analítica em que a evolução temporal foi substituída pelo número de iterações. E para o caso de um sistema massa-mola obtivemos sua velocidade e sua posição em função do tempo como somas parciais de séries que convergiram para as funções trigonométricas que são as soluções do oscilado
Rev. Bras. Ensino Fís.. Publicado em: 28/10/2019
-
2. Incidence of snakebites from 2007 to 2014 in the State of São Paulo, Southeast Brazil, using a Bayesian time series model
Abstract: INTRODUCTION: The monthly incidence of snakebites from 2007 to 2014 in the State of São Paulo, Brazil, was assessed. METHODS: A statistical model based on the discrete double Poisson distribution was proposed, including pairs of sine and cosine functions of time to account for seasonality and autoregressive terms. RESULTS: The analysis indicate
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-08
-
3. Simplified Analytical Approach to Evaluate the Nonlinear Dynamics of Elastic Cylindrical Shells Under Lateral Blast Loads
Abstract This paper presents an analytical solution to predict the nonlinear forced vibrations of elastic thin-walled cylindrical shells under suddenly applied loads. Interest in this problem is motivated by effects due to explosions on fluid-storage metal tanks. The model is based on the energy criterion due to Lagrange, in which the kinematic nonlinear rel
Lat. Am. j. solids struct.. Publicado em: 2016-07
-
4. Structural dynamic analysis for time response of bars and trusses using the generalized finite element method
The Generalized Finite Element Method (GFEM) can be viewed as an extension of the Finite Element Method (FEM) where the approximation space is enriched by shape functions appropriately chosen. Many applications of the GFEM can be found in literature, mostly when some information about the solution is known a priori. This paper presents the application of the
Lat. Am. j. solids struct.. Publicado em: 2012-06
-
5. Uma trajetória hipotética de aprendizagem sobre funções trigonométricas numa perspectiva construtivista
O presente trabalho tem como objetivo verificar: como compatibilizar perspectivas construtivistas de aprendizagem com o planejamento do ensino de Funções Trigonométricas; como as pesquisas na área de Educação Matemática, que trazem resultados importantes sobre a aprendizagem, podem contribuir para a organização do ensino de Funções Trigonométrica
Publicado em: 2010
-
6. Trajetórias hipotéticas de aprendizagem relacionadas às razões e às funções trigonométricas, visando uma perspectiva construtivista
This dissertation is part of the research project developed by researchers at the Pontifícia Universidade Católica of Sao Paulo, which seeks to develop support materials and curricular innovations to school, taking reference to the notion of Hypothetical Learning Trajectories (THA), a concept used by Dr Simon (1995) as part of the model Cycle of Teaching a
Publicado em: 2009
-
7. A family of vortex rings and a variational application to potential flows around three-dimensional bodies
A variational formulation and solution of general three-dimensional potential flows gave rise to the construction of a special family of ‘trial functions’. This family is composed by circular-sector vortex rings, here named α-rings, i.e., rings that are positioned on the border of a circular sector with aperture angle α. An explicit formula for the vel
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-06
-
8. The hybrid-Trefftz formulation with selective enrichment: application to two-dimensional problems in elasticity / Formulação híbrida-Trefftz com enriquecimento seletivo: aplicação a problemas bidimensionais da elasticidade
This work is inserted in the context of unconventional formulations in the finite elements method. Particularly, some aspects of the generalized finite elements method (GFEM) and the classic p-refinement are introduced in the well known hybrid-Trefftz stress formulation for the two dimensional elasticity. The presented formulation approximates two independen
Publicado em: 2008
-
9. Uma abordagem histórico-filosófica na educação matemática : contribuições ao processo de aprendizagem de trigonometria no ensino médio
The aim of this research was the construction process of a historical-philosophical approach through a historical reconstruction of Trigonometry, in which we carried through a documental research on the basis of History of Mathematics textbooks, particularly those that deal with the History of Trigonometry. We used a qualitative methodological approach, in w
Publicado em: 2008
-
10. ELEMENTOS FINITOS ENRIQUECIDOS PARA FLAMBAGEM E VIBRAÇÃO DE PLACAS / ENRICHED FINITE ELEMENTS FOR BUCKLING AND VIBRATION OF SHELLS
The focus of the present work is to developand evaluate enriched elements used to obtain critical loads, frequencies of vibration and respective modes for two-dimensional structural components (rectangular plates in bending under inplane compressive loading). The Rayleigh-Ritz approximation method has been employed, directed to the use of conventional finite
Publicado em: 2007
-
11. Random coefficient regression models using the Legendre polynomials, modified Jacobi polynomials and trigonometric functions as bases, with an application to genetic analysis of the weight of cattle from the Nellore breed / Modelos de regressão aleatória usando como bases as funções polinomiais de Legendre, de Jacobi modificadas e trigonométricas, com uma aplicação na análise genética dos pesos de bovinos da raça Nelore
Com o objetivo de avaliar o desempenho dos modelos mistos quando se assumem bases de funções ortonormais de Legendre, Jacobi modificadas e trigonométricas como covariáveis dos coeficientes aleatórios, os dados referentes à pesagem corporal de animais da raça Nelore do nascimento aos 800 dias, foram analisados com modelos que assumiram inicialmente coe
Publicado em: 2007
-
12. Two electrons in vertically coupled one-dimensional rings
A problem of two electrons spatially separated in vertically coupled one-dimensional rings is solved exactly by using the numerical trigonometric sweep method. The change of the level-ordering and the crossover of the curves of the energy levels as a functions of the rings radii, the separation between rings and the magnetic field, applied along the axis, ar
Brazilian Journal of Physics. Publicado em: 2006-09