نتایج جستجو برای: numerical inversion

تعداد نتایج: 374243  

Journal: :journal of solid mechanics 0
j.j tripathi department of mathematics, dr. ambedkar college, deekshabhoomi, nagpur -440010, maharashtra, india g.d kedar department of mathematics, r.t.m. nagpur university, nagpur-440033 maharashtra, india k.c deshmukh department of mathematics, r.t.m. nagpur university, nagpur-440033 maharashtra, india

a two dimensional generalized thermoelastic problem of a thick circular plate of finite thickness and infinite extent subjected to continuous axisymmetric heat supply and an internal heat generation is studied within the context of generalized thermoelasticity. unified system of equations for classical coupled thermoelasticity, lord-shulman and green-lindsay theory is considered. an exact solut...

2000
F. Boschetti L. Moresi

Inversion algorithms employ numerical evaluation of the mismatch between model and data to guide the search for minima in parameter spaces. In an alternative approach, the numerical evaluation of data misfit can be replaced by subjective judgement of the solution quality. This widens the class of problems that can be treated within the framework of formal inverse theory, in particular including...

Journal: :civil engineering infrastructures journal 0
morteza eskandari-ghadi university of tehran, collage of engineering, dept. of engineering science mohammad rahimian collage of civil eng., faculty of engineering, university of tehran, tehran, iran. amin mahmoodi collage of civil eng., faculty of engineering, university of tehran, tehran, iran. azizollah ardeshir-behrestaghi phd candidate, faculty of civil eng., babol noshirvani university of technology, babol, iran,

an infinitely long hollow cylinder containing isotropic linear elastic material is considered under the effect of arbitrary boundary stress and thermal condition. the two-dimensional coupled thermoelastodynamic pdes are specified based on equations of motion and energy equation, which are uncoupled using nowacki potential functions. the laplace integral transform and bessel-fourier series are u...

G.D Kedar J.J Tripathi, K.C Deshmukh

A two dimensional generalized thermoelastic problem of a thick circular plate of finite thickness and infinite extent subjected to continuous axisymmetric heat supply and an internal heat generation is studied within the context of generalized thermoelasticity. Unified system of equations for classical coupled thermoelasticity, Lord-Shulman and Green-Lindsay theory is considered. An exact solut...

Journal: :Reliable Computing 2011
Ivan Petkovic

More than three decades the implementation of iterative methods for the simultaneous inclusion of polynomial zeros in circular complex interval arithmetic is carried out using the exact inversion of disks. Based on theoretical analysis and numerical examples, we show that the centered inversion gives smaller inclusion disks. This surprising result is the consequence of better convergence of the...

1991
Joseph Abate Ward Whitt

Random quanti t ies of interest in operations research models can often be determined conveniently in the form of transforms. Hence, numerical t ransform inversion can be an effective way to obtain desired numerical values of cumulative distribution functions, probability density functions and probability mass functions. However, numerical transform inversion has not been widely used. This lack...

2001
R. Furfaro

A newly developed numerical Laplace transform inversion (NLTI) will be presented to determine the transient flux distribution within a subcritical fissile sample. The NLTI considered in this presentation has evolved to its present state over the past 10 years of application. The methodology adopted relies on the evaluation of the Bromwich contour through acceleration of the convergence of an in...

Journal: :IEICE Transactions 2011
Lubomír Brancík

In the paper, a technique of the numerical inversion of multidimensional Laplace transforms (nD NILT), based on a complex Fourier series approximation is elaborated in light of a possible ralative error achievable. The detailed error analysis shows a relationship between the numerical integration of a multifold Bromwich integral and a complex Fourier series approximation, and leads to a novel f...

1999
Joseph Abate Gagan L. Choudhury Ward Whitt

1.1 INTRODUCTION Numerical transform inversion has an odd place in computational probability. Historically, transforms were exploited extensively for solving queueing and related probability models, but only rarely was numerical inversion attempted. The model descriptions were usually left in the form of transforms. Vivid ex

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