Based on the spherical harmonic functions expansion and finite difference for discretization of transport equation, an inverse power scheme is presented for calculation of the k-eigenvalue problem.

基于球諧函數(shù)展開和有限差分離散，給出了中子輸運方程的源項反演逼近的反冪算法www.eqsky.com，該方法的優(yōu)勢是在適當?shù)某踔禇l件下可以顯著提高計算速度。

While the second order full extension ETG finite element method is applied to solve the problems concerned with natural convection and forced convection, different discretization schemes are deduced respectively. Then the equations are solved by using the technology of variable bandwidth and mass diagonal matrix.

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The solutions are obtained for both the steady-state case and the developing case by the fixed point theorem and the semi-discretization method.

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In the process of discretization, the uniform grid is shifted half mesh away from the poles by using the symmetry constrain property of Fourier coefficient on the sphere.

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Based on the element-free Galerkin method, the basic equations for steady thermal conductivity problem are deduced; and then the shaping of the coefficient matrices and load vectors in the discretization form of them are presented.

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Secondly, the rough set theory and data preprocessing are introduced and the general application procedure of rough set theory in data mining is analyzed. Then the authors researches on data discretization and attribute reduction are introduced in detail.

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In Chapter 6, based on discretization technique an implementable algorithm for nonconvex generalized semi-infinite minimax problems is presented and, utilizing properties of generalized quasi-directional derivative, its global convergence is proven under weak conditions.

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A tetrahedral mesh with up to somehundred thousands nodes can be generated within hours with a personal computer.. By using the general harmonic mean of heat conduction coefficient, a new discretization method in the unstructured grid with anisotropic and heterogeneous media is developed.

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Discretization is made with Hermite interpolation function and codes of computing the deflection and the dynamics of a marine riser has been written.

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Special considerations are given to spatial discretization of hyperbolic equation with non self-adjoint operator nature.

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