نتایج جستجو برای: integration method
تعداد نتایج: 1819335 فیلتر نتایج به سال:
The main purpose of this paper is to introduce a numerical method for the computation of cubature rules in the square [−1, 1]2 that are almost minimal, i.e. with few points w.r.t. the degree of precision d. In particular for all 24 ≤ d ≤ 55 the sets ξd and the weights {wk} are new. New rules are also achieved for degrees 15, d = 17, 19 and d = 23 respectively with 43, 54, 67 and 96 points.
We present a new finite volume scheme for the advection-diffusion-reaction equation. The scheme is second order accurate in the grid size, both for dominant diffusion and dominant advection, and has only a three-point coupling in each spatial direction. Our scheme is based on a new integral representation for the flux of the one-dimensional advection-diffusion-reaction equation, which is derive...
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equation A. Giordano, G. Finocchio, L. Torres, M. Carpentieri, and B. Azzerboni Department of Fisica della Materia e Ingegneria Elettronica, University of Messina, Salita Sperone 31, 98166 Messina, Italy Department of Fı́sica Aplicada, Universidad de Salamanca, Plaza de la Merced, Salamanca 37008, Spain Department of Elettronica, Informatica e Sistemistica, University of Calabria, Via P. Bucci 4...
all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...
a numerical method for solving variational problems is presented in this paper. the method is based upon hybrid of hartley functions approximations. the properties of hybrid functions which are the combinations of block-pulse functions and hartley functions are first presented. the operational matrix of integration is then utilized to reduce the variational problems to the solution of algebraic...
for several years, researchers in familiarity of efl teachers with post-method and its role in second and foreign language learners’ productions have pointed out that the opportunity to plan for a task generally develops language learners’ development (ellis, 2005). it is important to mention that the critical varies in language teaching was shown is the disappearances of the concept of method ...
in this paper, we introduce hybrid of block-pulse functions and bernstein polynomials and derive operational matrices of integration, dual, differentiation, product and delay of these hybrid functions by a general procedure that can be used for other polynomials or orthogonal functions. then, we utilize them to solvedelay differential equations and time-delay system. the method is based upon ex...
in this paper, an effective numerical method is introduced for the treatment of nonlinear two-dimensional volterra-fredholm integro-differential equations. here, we use the so-called two-dimensional block-pulse functions.first, the two-dimensional block-pulse operational matrix of integration and differentiation has been presented. then, by using this matrices, the nonlinear two-dimensional vol...
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