又简介根据达西定律和水均衡原理，建立了三维有限差分数值方程及其解法。
It is briefly introduced that three-dimensional finite difference numerical equation is built according to Darcy's law and water equilibrium principle.
数值方程显示：内部收益率与井深成负相关关系，与单井日产量成正相关关系。
It shows negative correlation between internal returns ratio and well depth, and positive correlation between interval returns ratio and daily production of single well.
这个数值是用及其巧妙的方程解出来的。
当麦克斯韦把在德国实验者们得到的相关的数值带入到他的方程中时，得到了斐索测定的光速数值。
When Maxwell plugged the relevant values, which had been obtained recently by experimenters in Germany, into his equations, out popped Fizeau's figure for the speed of light.
对这类方程给出一种有效的数值求解方法具有一定的实际意义。
It is of practical interest to give an efficient numerical method for solving the equations.
本文利用微分方程的数值解法对时间序列建模预测作了新的尝试。
In this paper, the numerical solution of differential equation is employed to establish the forecasting model of the time series.
基于速率方程建立了线性光放大器(loa)的数值模型，模拟了线性光放大器的增益钳制特性。
The numerical model of the linear optical amplifier (LOA) is built based on the rate equations. The gain clamping characteristics of LOA are simulated.
利用阶梯状地表数据对地震记录进行波动方程模拟时，在阶梯的角点处会产生严重的干扰，进而影响数值模拟结果。
Using step surface data for wave equation simulation of seismic data can produce serious interference at corner points of steps and further affect the results of numeric simulation.
选择共轭梯度法解决由有限元法形成的大型稀疏矩阵方程，应用FORTRAN语言编制了数值模拟系统软件。
Conjugate gradient method were choosed to solve the large sparse matrix equations induced by the FEM and computer language FORTRAN was used to programme the numerical simulation system software.
如果我们回到刚才,写在黑板上的某个化学反应方程式，肯定我们能够计算出,的数值，what，delta，G，would，be，for，each，one，of，them。,因为我们知道其中的每一部分应该如何计算。
If we go back to any of those chemical reactions that I wrote on the board before, right, well certainly we can calculate dG Because we know how to calculate all the parts of it.
这将是对偏微分方程数值分析方法的新的重要尝试。
This is a important attempt for the numerical analysis methods of PDEs.
为了提高计算效率，将多重网格方法应用到方程的数值求解中来加速收敛。
The multigrid techniques are added to accelerate the convergence of flow and adjoint equations to improve the efficiency of design.
本文利用微分方程的数值解法对时间序列建模预测作了新的尝试。
In this paper a new method of modeling forecasting is given for the time series by using the numerical solution of differential equation.
给出一个适用于平面断裂力学分析的新边界积分方程，在此方程的基础上建立了边界元数值计算方法。
A new boundary integral equation is introduced to analyze plane elastic problems with cracks, and the boundary element numerical method based on this equation is established.
这一方程只能用数值或图解法来解。
首先，目前在卫星动力学中常用的所有人造卫星运动方程的数值解法有待改进的最重要的问题就是稳定性问题。
First, now in all common numerical methods for the satellite dynamics equations the most important problem that needs to be improved is stability problem.
采用有限差分方法，对波动方程求数值解。
We use finite difference method to solve electromagnetic wave equation.
数值计算表明，这种方法可以降低方程的迭代次数约40%，并明显减少方程的求解时间。
Numerical results present that this method can decrease the number of iterative by 40% and reduce the computation time greatly.
当所有基础方程都能用一组定常参数值来描述，正如熟知的RLC电路的情况，就称该系统是稳态的，或时不变的，或常系数的。
When all elemental equations can be described by a set of constant parameter values, as in the familiar RLC circuit, the system is said to be stationary or time-invariant or constant coefficient.
区域分解算法是在并行机上求解偏微分方程数值解的一种方法。
The domain decomposition is a numerically approximating solution to partial differential equations on parallel computers.
应用龙格库塔法解非线性方程得到了该问题的数值解，给出了圆柱体随着柱体高度的直径变化曲线。
The numerical results of the nonlinear formula were obtained by Runge-Kutta method, and we have also obtained the curve of diameter of the example.
数值计算表明，这种方法可以降低方程的迭代次数约35%，并明显减少方程的求解时间。
Numerical results present that this method can decrease the iterative number by 35% and reduce the computation time greatly.
类似的方法还可以用在其它类型的偏微分方程数值解中。
Similar method may be applied in other types of partial differential equations.
指出关于铅球最佳投掷角计算公式中存在的问题，提出了计算这一角度的精确方程和数值解。
The problem of shots optimum putting angle in calculation formulae are pointed out, precise equation and numerical solution of this angle are given.
首先从耦合模方程出发，比较了数值分析结果与小信号近似分析的结果。
Firstly, the comparison of numerical analysis results and the small signal analysis results is given based on the coupled mode equation.
首先从耦合模方程出发，比较了数值分析结果与小信号近似分析的结果。
Firstly, the comparison of numerical analysis results and the small signal analysis results is given based on the coupled mode equation.
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