查询词典 discretization

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.

基于球谐函数展开和有限差分离散，给出了中子输运方程的源项反演逼近的反幂算法，该方法的优势是在适当的初值条件下可以显著提高计算速度。

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.

详细推导了应用二阶全展开ETG有限元法求解自然对流和强制对流问题时的有限元列式，并应用压力校正法与质量矩阵对角化及变带宽压缩存储技术对方程进行求解。

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

通过不动点理论结合半离散方法，分别得到定态情形和发展方程解的存在性。

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.

上述分析可推广至三子域情形，同样也得到了算法的有限步终止性。本文通过数值实验对区域分解算法进行数值分析。

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.

基于无单元伽辽金法基本理论，推导了稳态热传导问题的基本积分方程，并介绍了其离散形式中，包含刚度矩阵在内的各个系数矩阵和荷载向量的主要形成过程。

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.

然后，论文对粗糙集理论和数据预处理从理论和技术上做了一些介绍，并对数据挖掘中的各环节运用粗糙集理论的方法进行了分析；随后论文重点对作者在数据离散和属性约简两个方面做的研究工作进行了阐述。

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.

对于广义极大极小问题，本文第六章在较弱的条件下，利用广义伪方向导数的性质，用离散化的技巧给出了非凸广义半无限极大极小问题的一种可实现的全局收敛算法。

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.

生成的网格可以按照给定的纵横比实现剖分（纵横比可高达2000），这样就克服了非结构网格难于在粘性支层内使用的缺点；给出了切平面测度和主曲率测度矩阵的建立方法，结合各向异性网格生成技术，实现了三维空间曲面剖分，为三维实体剖分做了准备。

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

用Hermite插值函数离散，在微机上编写海洋立管静、动力分析程序，通过计算分析研究管内流体对立管侧向变形和应力的作用；另外，探讨管内流体的流动速度和立管顶端的预张力对立管动力特性的影响。

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

同时构造了一个用于求解此耦合过程的统一混合弱形式，并且针对其中具有非自伴随算子特性的双曲线控制方程的空间离散进行了特殊考虑。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。