差

Results showed the training effect did not reach the significant difference. However, by using SPSS for windows 10.0 software mix design two factor trends analysis at pretest, mid-test and posttest stage. Results showed the long distance group performed better than the three-point line training group in term of training effect. Indeed, the three-point line group surpassed than the control group.

结果显示，各组训效果虽未达显著差，但前测、中测及后测等据经SPSS for windows 10.0套装统计软体进混合设计二因子趋向分析，考验各组进步趋向差性后显示，远距训组在本实验的训效果的确优於三分线训组，而三分线训组的训效果又优於控制组。

In chapter 3, we give a unifying proof for some known difference sets by using Gauss sums, and we construct a new family of divisible difference sets.

在第三章中，我们用Gauss和给出了几个已知差集的统一的代数证明，它们原有的证明要么是用组合设计的方法，要么是用很技巧性的计数方法得到的。同时我们构造了一族新的可分差集。

In order to solve the problem,starting from the analysis of the simplest plane wave numerical theory,we derived the formula of relative phase velocity and group velocity under the condition of arbitrary high-order finite-difference approximation,and gave the computational method for acquiring the optimum Courant number,and then analyzed the anisotropic effects due to finite difference approximation.

针对此，从最简单的平面波数值理论分析出发，推导了任意高阶有限差分近似条件下相对相速度和相对群速度的计算公式，给出了求解最佳Courant数的计算方法，分析了差分近似造成的各向异性效应。

This model used the finite—difference approximation to the advection— dispersion equation. The spatial derivatives in the flow equation are approximated by central difference written about grid—block boundaries and time derivatives are approximated by a fully implicit backward scheme.

水流方程的空间导数采用中心差分格式离散，时间导数采用隐式差分格式离散，建立了土壤水分和污染物在各种饱和度的条件下迁移转化方程耦合求解的二维数值计算模型。

Jacobian, Hessian Matrix Properties, Sensitivity Analysis w.r.t Design Variables, Fixed Parameters and Constraints, Normalization, Finite Difference Approximation, Automatic Differentiation, ANOVA, Adjoint Methods, Examples

Jacobian， Hessian矩阵属性，灵敏度分析w.r.t设计变量，固定参数和约束，归一化，有限差分逼近算法，自动差分算法，ANOVA，伴随矩阵法，举例

First,we construct the finite difference scheme of the equation,the existence and the uniqueness of the solution for the scheme are proved.

首先，构建原方程的有限差分格式，并验证了差分格式解的存在唯一性。

Maxwell's equations are replaced by a set of finite difference equation. If we solve it in time domain, we can get Finite Difference Time domain method.

从麦克斯韦方程出发建立地质雷达的数学模型，麦克斯韦方程可以转化成有限差分方程组，若在时域中对其求解就是时域有限差分方法。

The working mechanism of Wollaston prism differential interference contrast method is introduced, and by this method, the processes of ignition, backfire, flameout are observed. The effects of the stabilizing rod on v-flames are also researched.

介绍了Wollaston棱镜差分干涉仪的工作原理，用差分干涉法研究了预混V形火焰的的点火、熄火和回火过程的特性以及稳定杆对V形火焰的影响。

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When the forward slip difference is large,the influence of velocity difference is small and workpiece is easily bent.

经试验结果分析，弯曲是轧件上、下表面前滑差和速差综合作用的结果。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。