Academic literature on the topic 'Transformada inversa de Laplace'
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Journal articles on the topic "Transformada inversa de Laplace"
Cariello, Igor Caetano, Paulo de Tarço Honório Junior, Grazione De Souza, and Helio Pedro Amaral Souto. "Revisão e Implementação de Soluções Analíticas para a Determinação da Pressão em Poços de Petróleo." CALIBRE - Revista Brasiliense de Engenharia e Física Aplicada 5 (December 20, 2020): 17. http://dx.doi.org/10.17648/calibre.v5.1477.
Full textFilobello-Niño, Uriel Antonio, Héctor Vázquez-Leal, Mario Alberto Sandoval-Hernández, Jesús Huerta-Chua, and Víctor Manuel Jiménez-Fernández. "Método de perturbación con transformada de Laplace para resolver problemas no lineales de múltiples soluciones, con condiciones a la frontera mixtas y Neumann." CienciaUAT 13, no. 2 (January 31, 2019): 06. http://dx.doi.org/10.29059/cienciauat.v13i2.1119.
Full textEscobar, Freddy Humberto, Fabián Andrés Leguízamo, and José Humberto Cantillo. "Diseño de Software para comparar los algoritmos de Stehfest e Iseger para inversión Laplaciana en pruebas de presión." Ingeniería y Región 9 (December 30, 2012): 15–27. http://dx.doi.org/10.25054/22161325.771.
Full textSanusi, Wahidah, Syafruddin Side, and Beby Fitriani. "Solusi Persamaan Transport dengan Menggunakan Metode Dekomposisi Adomian Laplace." Journal of Mathematics, Computations, and Statistics 2, no. 2 (May 12, 2020): 173. http://dx.doi.org/10.35580/jmathcos.v2i2.12580.
Full textArifin, Arifin, Muhammad Wakhid Musthofa, and Sugiyanto Sugiyanto. "Aplikasi Transformasi Laplace Pada Rangkaian Listrik." Jurnal Fourier 2, no. 1 (April 1, 2013): 45. http://dx.doi.org/10.14421/fourier.2013.21.45-61.
Full textDe Jesus, Noé Franco, Camila Pinto da Costa, Leslie D. Pérez Fernández, and Julián Bravo Castillero. "Estudo comparativo de três algoritmos de inversão numérica da transformada de Laplace." Revista Brasileira de Computação Aplicada 9, no. 1 (May 28, 2017): 63. http://dx.doi.org/10.5335/rbca.v9i1.6700.
Full textDe Lima Valdés, Ernesto. "Procesando imágenes de descarga eléctrica: Hacia la modelación matemática e interdisciplinaridad." Revista EDUCARE - UPEL-IPB - Segunda Nueva Etapa 2.0 25, no. 2 (August 26, 2021): 341–54. http://dx.doi.org/10.46498/reduipb.v25i2.1289.
Full textSabas, Juan, Glay Cedeño, Víctor García, Luis Cobacango, Willam Moreano, José Guanoluiza, Jofre Veliz, Luis Zambrano, and Maritza Vélez. "Solución analítica al problema no homogéneo del látigo." Revista Bases de la Ciencia. e-ISSN 2588-0764 2, no. 1 (April 28, 2017): 31. http://dx.doi.org/10.33936/rev_bas_de_la_ciencia.v2i1.731.
Full textHuamaní Navarrete, Pedro Freddy. "Descomposición de imágenes 3D en sub-bandas a través de la transformada discreta de wavelet." Paradigmas 3, no. 1 (July 4, 2018): 77–89. http://dx.doi.org/10.31381/paradigmas.v3i1.1483.
Full textMitrofanov, Georgy, Viatcheslav Ivanovich Priimenko, Roseane Marchezi Misságia, and Luis Henrique Amaral. "Transformada de Laplace na solução de problemas inversos dinâmicos da sísmica." Revista Brasileira de Geofísica 27, no. 4 (December 2009): 527–44. http://dx.doi.org/10.1590/s0102-261x2009000400001.
Full textDissertations / Theses on the topic "Transformada inversa de Laplace"
Malezan, Alex. "Reconstrução espectral de tubos de radiação odontológicos usando a transformada inversa de Laplace da curva de atenuação." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-02092013-233953/.
Full textIn the study of radiographic images, the parameters related to the subject contrast, SC, signal to noise ratio, SNR, and dose, are linked to the shape of the X-ray spectrum used and their knowledge allows to predict and optimize the image quality. In this work we developed a methodology to obtain the spectrum of dental X-ray tubes of clinical usage in an indirety way. This methodology is based on application of a mathematical model that uses the inverse Laplace transform of the attenuation curve to generate data on the spectral distribution of the beam. With the aid of an ionization chamber and high purity aluminum lters, were raised the transmission curves of 8 X-ray tubes that are available commercially. The method validation was performed with direct spectrometry detector cadmium telluride (CdTe), whose response was determined by Monte Carlo simulation (MC). From reconstruction obtained spectral studies were carried out on the parameters of SNR image quality, contrast object, SC, KERMA entrance skin. The performance of the tubes was evaluated based on the relationship between SNR and KERMA entrance skin. The results show that it is possible to determine the spectral distribution of dental X-ray tubes based on the proposed method. The proposed relationship between SNR and KERMA entrance skin suggests that tubes with low energy photons have a low performance.
d\'Eurydice, Marcel Nogueira. "Desenvolvimento de metodologias para o estudo de meios porosos por ressonância magnética nuclear." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-30082011-084023/.
Full textThis study aimed to implement Nuclear Magnetic Resonance (NMR) for the study of porous media in general, with potential applications in the study of rocks, bones, porous polymers and ceramics. Due to the heterogeneity and complexity of these media, it becomes important to correlate various physical parameters that contain information about both the molecular dynamics on the structure and physical chemistry of pore fluid and the permeate. Using NMR techniques, it is possible to investigate these parameters by measuring diffusion coefficients, transverse and longitudinal relaxation times of fluids within the pores, which have different dynamical states, ranging from an isotropic liquid to a liquid with high viscosity or organized due to its interaction with the surface of the pores or particles suspended in fluid. For this, we employed NMR techniques based especially on measurements of transverse relaxation times, which when properly combined, allow the construction of two-dimensional maps that correlate properties of the molecular dynamics of fluids saturating these samples at different times of the experiment, providing information on dimensions and time scales involved in the dynamics of fluids saturating the porous media. These maps were obtained from experimental data on water-saturated oil rocks via inversion of two-dimensional Laplace transform. This work was performed using the existing infrastructure in the IFSC NMR laboratories and much of the hardware and software was developed during the doctoral project. We developed a program for processing the one-dimensional inverse Laplace transform data, which was used for studying the adhesion properties of gypsum pellets when subjected to different pressures. Additionally, we developed computational models to simulate physical-chemical properties related to the experiments used for the studies of fluids within porous media. Part of this work included studies performed in Victoria University of Wellington in collaboration with Professor Paul T. Callaghan through the Programa de Doutorado e Estágio no Exterior (PDEE) from CAPES.
Junqueira, Silvio Luiz de Mello. "Aplicação da transformada de Laplace ao problema inverso da condução do calor." [s.n.], 1990. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264316.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
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Resumo: O problema inverso da condução do calor envolve o cálculo da temperatura e ou do fluxo de calor a partir de medidas da temperatura, num ponto interior de um sólido. Esta dissertação compara três técnicas numéricas envolvendo inversão de transformadas de Laplace, no trato do problema inverso da condução do calor. A comparação é procedida através de testes que visam quantificar o poder de resolução dos algoritmos de inversão. É estudado o efeito causado pela introdução de um erro nas medidas da temperatura interna e sua influência nos valores do fluxo de calor e da temperatura em uma superficie externa do sólido
Abstract: The inverse heat conduction problem consists of obtaining the temperature or heat flux at a external surface from temperatures measured at internal points in solids. The present work compares three numerical technics of inverse Laplace transform applied to the inverse heat conduction problem. The comparison is carried out through tests in order to measure the resolving power of the inversion algorithms. The effect caused by the introduction of measurement errors in the interior temperature is studied along with the influence of the errors on the temperature and heat flux calculated at an other boundary of the solid
Mestrado
Mestre em Engenharia Mecânica
Marques, Joaquim de Fontes. "Inversão numérica da transformada de Laplace à custa dos polinómios de Laguerre." Dissertação, Universidade do Porto. Reitoria, 1988. http://hdl.handle.net/10216/10106.
Full textBarichello, Liliane Basso. "Inversão numérica da transformada de Laplace por polinômios trigonométricos e de Laguerre." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1988. http://hdl.handle.net/10183/1382.
Full textMarques, Joaquim de Fontes. "Inversão numérica da transformada de Laplace à custa dos polinómios de Laguerre." Master's thesis, Universidade do Porto. Reitoria, 1988. http://hdl.handle.net/10216/10106.
Full textPacheco, Alexandre Rodrigues. "Análise viscoelástica via método dos elementos finitos e inversão numérica da transformada de Laplace." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1996. http://hdl.handle.net/10183/170089.
Full textThe viscoelastic analysis of laminated structures of polymeric matrix compsite materiais using Laplace transform is the objective of this work. The inverse of the Laplace transform is carried out using numerical methods adapted to a finite element method formulation. In this altemative aproach, as the constitutive equations are formulated on the complex plane in the transformation variable 's', the viscoelastic problem reduces to an equivalent elastic one. The complex solutions are then sent back to the physical plane for the desired time value, dispensing incremental processes. Examples of aplications compamng results obtained with the Laplace Transformation Method and the State Variables Method (that treats the viscoelastic problem in an incremental form) are presented.
Kozakevicius, Alice de Jesus. "Resolução dos modelos unidimensional e bidimensional de solidificação de metais puros e ligas eutéticas através da transformada de Laplace." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1994. http://hdl.handle.net/10183/119114.
Full textThe modeling of solidification, proposed by Ka.netkar et al, treats the solidification as a process involving ma.croscopic and microscopic íeatures. The ma.croscopic aspect desenhes the heat transfer from the metal to the cylindric body and from the system "metal-mold" to the surroundings. The second describes the formation and development of grains in the metal during its fase changing. The coupling of these two features of the process is ma.de with the inclusion of a source term, tha.t representa the nucleation, in the conservation equation for the heat transíer. lnstead of using finite diference methods for solving the equations of the unidi.mentiona. l model, Laplace transform with respect to the temporal va.riable ( t) is applied in the equations, and for solving analytically the system of equations generated by the boundary conditions from the model, the software REDUCE is used. In the two dimentional model is used a nodal method to transform the problem aga.in in a unidimentional modeling. The equations are integrated in a choosen direction, here z. After that they were solved for a mean heat flux. lt is aslo possible to divide the domain of integration and to calculate the mean heat flux in ea.ch new region considering that ea.ch one is connected with the others by new boundary conditions.
Moraes, Tiago Bueno de. "Precessão Livre no Estado Estacionário com alternância de fase para RMN em alta e baixa resolução." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-14102016-091634/.
Full textThe application of a pulse sequence with repetition time much smaller than the relaxation times, Tp << T2; T1, causes the magnetization to reach a steady state, described by H. Y. Carr as a Steady State Free Precession (SSFP). In this condition, the signal is composed of the complex overlapping of the FID and eco components. SSFP type sequences are used in fast acquisition of NMR signals, resulting in a good signal to noise ratio (s/r) in a short time interval, however, they introduce phase and amplitude anomalies due to the complex interaction between the components of the steady state. In this work, we develop SSFP type pulse sequences for NMR in high and low resolution, with alternation and increment of phase. In high resolution, we develop SSFPdx and SSFPdxdt sequences, with linear and quadratic phase increment respectively. Results show that the low sensitivity nuclei spectra can be obtained with the same s/r ratio in smaller experimental time, about an order of magnitude, and the developed sequences can remove the spectral anomalies. In low resolution, the results show that the introduction of a phase alternation in the Continuous Wave Free Precession (CWFP) allows the elimination of the dependence of the sequence with the offset frequency and the time between pulses. Besides, we show that the CP-CWFPx-x sequence with a small refocalization angle (5° to 10°) allows the fast estimative of the longitudinal relaxation time in a single experiment. The results of the studies conducted during an international research internship are also presented. Steady state pulse sequences – DECPMG and Split 180° – were studied and implemented in compact magnetic systems: mini-Halbach and MOUSE-NMR. Finally, the results of the application of the Krylov Basis Diagonalization Method (KBDM) and the Inverse Laplace Transform for the analysis of SSFP signals are presented. The results show that KBDM is a useful tool in data processing for low and high resolution, both for obtaining spectra and determining the relaxation times distribution.
SILVA, Fernanda clara de França. "Existência de solução para algumas equações de evolução via Teoria de semigrupo analítico." Universidade Federal de Campina Grande, 2007. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1192.
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CNPq
Capes
Neste trabalho, apresentamos uma introdução à Teoria de semigrupos analíticos de operadores lineares não limitados, sendo desenvolvidas algumas aplicações desta Teoria na análise da existência de solução para as equações Diferenciais Ordinárias em espaços de Banach da forma u1(t)−Au(t)= f(t,u(t))+K(u)(t), onde f e K são funções dadas e A é um operador linear não limitado.
In this work we present an introduction to the Theory of analytical semigroups of unbounded linear operators, with some applications of this theory to the existence of solutions for Ordinary Differential equations in Banach spaces of form: u1(t)−Au(t)= f(t,u(t))+K(u)(t), where f e K are given functions and A is an unbounded operator.
Book chapters on the topic "Transformada inversa de Laplace"
Oliveira, Samuel Conceição de. "MODELAGEM MATEMÁTICA DO ATRASO NO SINAL DE SONDAS DE OXIGÊNIO DISSOLVIDO EMPREGANDO TRANSFORMADA DE LAPLACE." In Prospecção de Problemas e Soluções nas Ciências Matemáticas, 110–19. Atena Editora, 2020. http://dx.doi.org/10.22533/at.ed.71320020410.
Full textCerutti, Fabrício Loreni da Silva, Gabriela Hoff, Marcelo Victor Wüst Zibetti, Hugo Reuters Schelin, Valeriy Viktorovich Denyak, Sergei Anatolyevich Paschuk, Ivan Evseev, Leonardo Zanin, and Ediney Milhoretto. "RECONSTRUÇÃO DE IMAGEM DE TOMOGRAFIA COMPUTADORIZADA POR FEIXE DE PRÓTONS, UTILIZANDO A TRANSFORMADA INVERSA DE RADON, BASEADA EM IMAGENS GERADAS POR SIMULAÇÃO COMPUTACIONAL." In Impactos das tecnologias nas ciências biológicas e da saúde 2, 238–45. Antonella Carvalho de Oliveira, 2019. http://dx.doi.org/10.22533/at.ed.38419160126.
Full textConference papers on the topic "Transformada inversa de Laplace"
Coll, Carmen, Damián Ginestar, Esther Sanabria, and Elena Sánchez. "La metodología de clase inversa en la UPV: Una experiencia en el laboratorio de matemáticas." In IN-RED 2017: III Congreso Nacional de Innovación Educativa y Docencia en Red. Valencia: Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/inred2017.2017.6817.
Full textSajid Leon Colqui, Jaimis, Tainá Fernanda Garbelim Pascoalato, Sérgio Kurokawa, and Anderson Ricardo Justo de Araújo. "Aperfeiçoamento dos modelos a parâmetros concentrados utilizados para representar linhas de transmissão em análises de transitórios eletromagnéticos." In Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1285.
Full textDa Costa, Camila Pinto, and Karine Rui. "Fechamento Não-Local da Equação de Advecção-Difusão Utilizando Diferentes Métodos de Inversão Numérica para a Transformada de Laplace." In CNMAC 2016 - XXXVI Congresso Nacional de Matemática Aplicada e Computacional. SBMAC, 2017. http://dx.doi.org/10.5540/03.2017.005.01.0406.
Full textOliveira, Daniela Dos S. de, and E. Capelas de Oliveira. "Oscilador harmônico fracionário via transformada de laplace." In XXXV CNMAC - Congresso Nacional de Matemática Aplicada e Computacional. SBMAC, 2015. http://dx.doi.org/10.5540/03.2015.003.01.0207.
Full textTeodoro, Graziane Sales, and Edmundo Capelas de Oliveira. "Funções de Mittag-Leffler e a transformada de laplace." In XXXV CNMAC - Congresso Nacional de Matemática Aplicada e Computacional. SBMAC, 2015. http://dx.doi.org/10.5540/03.2015.003.01.0208.
Full textRastgoftar, Hossein, and Faissal A. Moslehy. "An Inverse Method for Controlling the Temperature Distribution in Infinite Wedge Domain." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87596.
Full textBressan, Glaucia Maria, Thiago De Souza Pinto, and Leandro Naves de Oliveira. "Aplicação das Equações Diferenciais e da Transformada de Laplace em Circuitos Elétricos." In CMAC Sul – Congresso de Matemática Aplicada e Computacional. SBMAC, 2014. http://dx.doi.org/10.5540/03.2014.002.01.0031.
Full textRODRIGUES DE MOURA, C. H., and C. DA SILVA BATISTA. "SOLUÇÃO DE EQUAÇÃO DE BALANÇO POPULACIONAL VIA TÉCNICA DA TRANSFORMADA DE LAPLACE." In XI Congresso Brasileiro de Engenharia Química em Iniciação Científica. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/chemeng-cobeqic2015-331-33931-263992.
Full textNardino, Maicon, Jorge Ribes, Elisia R. Correa, Régis S. Quadros, Willian S. Barros, and Daniela Buske. "Caracterização de Modelos para a Predição de Poluentes Atmosféricos." In VII Workshop de Computação Aplicada à Gestão do Meio Ambiente e Recursos Naturais. Sociedade Brasileira de Computação - SBC, 2020. http://dx.doi.org/10.5753/wcama.2016.9544.
Full textA. Diniz, Fernando, Rafael Alipio, and Rodolfo A. R. Moura. "Análise da Influência da Dependência da Frequência dos Parâmetros Elétricos do Solo na Modelagem e Propagação de Ondas Eletromagnéticas em Linhas de Transmissão Aéreas." In Simpósio Brasileiro de Sistemas Elétricos - SBSE2020. sbabra, 2020. http://dx.doi.org/10.48011/sbse.v1i1.2180.
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