数值算法

In this paper, pressure is used for a primary dependent variable and SIMPLE algorithm is used to simulate the 3-dimensional turbulent flow. In order to advance SIMPLE algorithm to compressible flow, retarded density is utilized.

本文采用SIMPLE方法，以压力为基本求解变量对三维可压缩湍流流场进行数值求解，并采用密度延迟修正将SIMPLE算法扩展到可压缩流动的计算。

Firstly, based on the method of pressure-velocity coupling introduced by SIMPLE algorithm and a revised method of solving the unsteady equation of stream function and vorticity on uniform grid, a special algorithm called primitive-variable-time-dependent approach is formed in the present study. In this algorithm the Navier-Stokes equation in primitive variable form is solved by using the time-dependent approach on non-uniform staggered grid system. The second-order accuracy finite difference is used for the first and second partial derivatives of all variables of the convective terms and diffusion terms.

首先，本文在SIMPLE算法系列处理速度与压力耦合问题的思路和均匀网格下改进的关于流函数涡量方程的数值求解方法的基础上，将非定常原始变量Navier-Stokes方程的求解推广至非等距交错网格剖分，形成了具有本文特色的原始变量时间推进方法，其中对流项和扩散项中各变量的各阶导数均采用二阶精度公式，包括温度在内的离散方程组采用ADI迭代方法求解。

We have improved the method to avoid the complicated calculating of probability and numeral integral.

由于原先的方法中需要进行繁琐的数值积分和概率的计算，我们对能量函数的计算进行了改进，避免了这种繁琐的计算，使得算法更加简便、易行。

The Computer Analysis Technique is used to analyze the structure of surface irrigation simulation model srfr firstly, and then the srfr is connected with the Genetic Algorithm model, to consist of self-contained parameter optimization inverse program.

用计算机解析技术对地面灌溉数值模拟程序srfr进行了解析，然后把经过解析后的模拟程序与遗传算法程序进行连接，形成了一个完整的参数优化反求程序。

Many learning approaches to knowledge acquisition have been promisingly developed recently. A popular and efficient method for decision tree induction from discrete data is ID3 algorithm.

许多知识获取的学习方法一直持续发展，一个普遍且有效的方法，主要是对於非连续数值资料的决策树归纳，称为ID3演算法。

Apply Genetic Algorithm and CFD technology, in this paper,to calculate the main parameter of WPC96's waterjet propulsor and simulate the flow of the water in waterjet inlet.In addition,analyze the factors that can affect waterjet system efficiency, such as K ,mostly geometry parameters,IVR.

在此基础上运用MATLAB遗传算法和CFD软件——FLUENT对喷水推进器主要参数优化计算以及进水管流场数值模拟进行了研究，并针对影响喷水推进器进水管系统效率的主要参数(如进水速比IVR、喷速比等)进行了分析。

If the method is combined with the subdivision method of curve,the rational spline curve with higher-order continuity is presented which is the approximation of offset curve.

该方法与离散算法相结合，可得到等距曲线的高阶连续的有理样条逼近曲线，最后，通过数值实例与已有方法作了比较。

Numerical simulations of laminar flow separation and reattachment occurred in an annular backstep passage are performed by the SIMPLER algorithm.

用SIMPLER算法对流过环形后台阶通道内的层流分离和再附着进行了数值模拟。

The result of numeric computation demonstrates that the approximate directional algorithm is robust, the result of Monte Carlo simulation shows that the performance of the optimum four-element array structure is better than the common one or the regular tetrahedron one.

数值计算结果表明，提出的近似定向算法是可靠的；计算机蒙特卡罗仿真结果表明，导出的最佳四元阵列性能优于普通的四元阵和正四面体阵。

Use the C Language Chinese Remainder Theorem algorithm input equation, the number of a numerical input for each two!

使用c语言实现的中国剩余定理算法首先输入方程数目，在分组每次两个数值输入！

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。