نتایج جستجو برای: pseudo spectral integration matrix

تعداد نتایج: 775410  

Journal: :Journal of Cosmology and Astroparticle Physics 2010

M. Mosleh M. Otadi S. Abbasbandy,

In this paper, a numerical method for nding minimal solution of a mn fullyfuzzy linear system of the form Ax = b based on pseudo inverse calculation,is given when the central matrix of coecients is row full rank or column fullrank, and where A~ is a non-negative fuzzy mn matrix, the unknown vectorx is a vector consisting of n non-negative fuzzy numbers and the constant b isa vector consisting o...

2009
K. Burrage Z. Jackiewicz B. D. Welfert

Abstract: We establish a relation between the length T of the integration window of a linear differential equation x′+Ax = b and a spectral parameter s∗. This parameter is determined by comparing the exact solution x(T ) at the end of the integration window to the solution of a linear system obtained from the Laplace transform of the differential equation by freezing the system matrix. We propo...

Journal: :SIAM Journal on Numerical Analysis 2021

Explicit time advancement for continuous finite elements requires the inversion of a global mass matrix. For spectral element simulations on quadrilaterals and hexahedra, there is an accurate approximate matrix which diagonal, making it computationally efficient explicit simulations. In this article shown that standard space polynomials used with triangular elements, denoted $\mathcal{T}(p)$, w...

Journal: :journal of electrical and computer engineering innovations 2013
r. hajmohammadi h. nasirisoloklo m.m. farsangi

in this paper, an optimal control of quadratic performance index with nonlinear constrained is presented. the sine-cosine wavelet operational matrix of integration and product matrix are introduced and applied to reduce nonlinear differential equations to the nonlinear algebraic equations. then, the newton-raphson method is used for solving these sets of algebraic equations. to present ability ...

Journal: :زمین شناسی اقتصادی 0
بهرام بهرام بیگی حجت اله رنجبر جمشید شهاب پور

hyperion hyperspectral data contains a very rich source of information from the earth surface that collects 242 narrow contiguous spectral bands. achieving this source of rich information is subject to the performance of suitable image processing methods on raw satellite data. satellite image processing methods can be classified into two categories of statistical-based and spectral-based. in th...

2007
Tatjana Grbic Ivana Stajner-Papuga Ljubo Nedovic

An approach to the integration of set-valued functions based on the pseudo-integral has been proposed. Some basic properties of the pseudo-integral of set-valued functions have been shown.

Journal: :Linear Algebra and its Applications 1988

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