查询词典 explicit difference schemes

Numerical simulations of the three dimension viscous flow over the SUBOFF-1 model provided by DARPA and other two models are processed by solving RANS equations withκ-εtwo-equation turbulence model and finite volume method, and with SIMPLEC method for pressure-linked terms, central difference shemes for temporal derivative terms, and second-order upwind schemes for convective and diffusive terms.

本文基于RANS方程，采用κ-ε两方程湍流模型来封闭控制方程，采用有限体积法离散控制方程，对于速度压力关联方程，应用协调一致的SIMPLEC算法求解，变化率项用中心差分，对流扩散项采用二阶迎风格式，分别对DARPA提出的裸艇体SUBOFF-1模型以及另外两种回转体模型进行了数值模拟计算。

By means of the difference discrete variational principle, discrete Legendre transformation and discrete version of the E-L cohomology, for a kind of regular meshes we''ve found there is a kind of symplectic/multisymplectic structures with corresponding symplectic/multisymplectic finite element method/mixed finite element method schemes.

利用差分离散变分原理、离散Legendre变换和EL上同调的离散形式，对于正规网格找到一类有限元和混合有限元的辛或多辛结构，以及相应的辛有限元/混合有限元格式。

In the color quantization phase, two schemes have been adopted,one is general palette quantization alogrithm,other is color difference-based quantization algorithm.Which scheme should be choosen depends on the size of image and the users' demands for time and qualities.

在颜色量化阶段，系统采用了两个方案：全局调色板量化方案和基于色差最小量化方案，用户可根据图像的大小和对速度及质量的需求进行选择。

Since 1950 s, the research of numerical method for hyperbolic conservation laws is one of key research directions in computational mathematics. The finite difference method, specially TVD and ENO schemes, for hyperbolic conservation laws are very successful.

双曲型守恒律方程数值计算方法的研究，是二十世纪五十年代以来，计算数学中的一个重要研究方向。

And many finite difference schemes have been widely used to solve hyperbolic conservation laws.

有限差分格式已经被广泛应用于守恒律方程的求解。

The suitable sub-egion schemes are seeked for the study of different seasonal precipitation in China using the difference index method of interclass and intraclass average correlation coefficients in the dynamic analysis cluster process.

利用动态分析分层聚类过程中组内和组间平均相关系数的差异指标法，为不同季节降水研究找到了适合的分区方案。

In traditional finite difference schemes polynomial interpolation and divided differences have been taken to approximate the derivatives.

传统的差分格式用多项式插值和差商近似导数。

The deviation of forecasting brought by the difference of CCP schemes would not increase lineally with integration forward.

结果表明，模式非绝热物理过程可以从两方面影响暴雨预报的不确定性。

Seven experimental Monel K-500 alloy were prepared with various addition schemes. The microstructures of seven experimental alloys in hot roll condition were examined, which showed no obviously difference. However, after solution treatment, the grains of the Mg added 2〓 alloy grew apparently, which are much bigger than the grain size of standard Monel K-500 alloy with no additive. It implies that the minor Mg element had purified the grain boundary.

7种合金在轧制状态时的显微组织并无明显的差别，但经固溶热处理后，加Mg的2〓合金的晶粒明显长大，大于未加微量元素的MonelK-500合金的晶粒，显示Mg在合金中有净化晶界的作用，但同时添加了Mg、Cr、Co元素的6〓合金，它们的共同作用使晶粒长大的阻力又增加了。

Then the differences among the analyzing schemes are compared and value and quantification are give in accordance with the sequence of the differences before a difference matrix is setup and calculated.

判断矩阵的基本内容是在同一准则下，对n个不同元素(A1 ，A2 ，…，An)进行两两比较，并得到判断矩阵B。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。