级数的

In this paper, a high order accuracy difference method is presented for solving unsteady convection diffusion equation by using Implicit Perturbation Finite Difference scheme. Firstly, we use the steady convection diffusion equation, the constant coefficients of this equation are expanded to power series of grid-spacings, then the high-order Perturbation Finite Difference scheme is obtained by determining the coefficients of the power series. Put this scheme on unsteady convection diffusion equations and modified it, the IPFD scheme is constructed.

本文利用摄动差分思想，对定常对流扩散方程中的空间微商系数进行摄动展开，展开幂级数系数通过消去摄动格式修正微分方程的截断误差项求出，由此获得方程的隐式摄动差分格式，将此方法应用于非定常对流扩散方程，并加以修正，得到该方程的修正隐式摄动差分格式。

The effect of parameters such as the wedge angle, the incident wavefrequency and the angle of incidence is also analyzed. Furthermore, theaccuracies of the numerical results are checked by the convergence of theground surface displacement and residual errors of boundary conditionswith the increasing progression term.

本文定性分析了地形角度、入射角度和入射频率等因素的影响，并从级数项数增加时地表位移结果的收敛以及边界条件残量的收敛两个方面验证了结果的正确性。

Calculus deals with the fundamental theories of calculus, including function, limit, continuation, derivative and differential, mean value theorem, the application of indefinite integral and definite integral, infinite series, as well as the practical instances applied in economic management.

微积分讲述微积分的基本知识，包括函数、极限、连续、导数与微分、中值定理、不定积分与定积分的应用、无穷级数等。以及这些知识在经济管理中的应用的实例与练习。

We prove that the GerberShiu functionΦsatisfies a renewal equation and a infinite series expression ofΦis obtained.

在本章中，利用逼近的方法，得到了此风险过程的罚金折现函数Φ满足的更新方程及其Φ的一个级数表达式。

It is only by assuming an infinitely small magnitude, and a progression rising from it up to a tenth, and taking the sum of that geometrical progression, that we can arrive at the solution of the problem.

只有假设出无穷小数和由无穷小数产生的十分之一以下的级数，再求出这一几何级数的总量，我们才能得出问题的答案。

Its characteristic is through impulse stimulation by using the grating width, diffraction series, laser wavelength, and the Doppler frequency shift to determine the shock velocity and the shock acceleration instantaneous value.

对差动式光栅激光干涉冲击校准装置的原理作了介绍，特点是使用冲击激励，通过光栅的栅距、衍射级数、激光波长及激光的多普勒频移来最终确定冲击速度和加速度的瞬时值。

According to our teaching practice,effective applications of some relative calculus background knowledge in teaching are given,such as introduction of real number ,Newton-Leibniz s formula,principle of integrability,meaning of infinite series.

结合教学实践，讨论了实数的引入，Newton-Leibniz公式，无穷级数，函数的可积性准则这几个相关的微积分背景知识在教学中的有效运用。

In chapter 1,by the general methods of summability methods,we establish Chover-type law of the iterated logarithm for Abel's weighted sumsand certain power series weighted sums of stable random variables.

第一章利用可和方式的典型方法，讨论了稳定随变量序列的Abel加权和及较广泛的幂级数加权和的Chover型重对数律。

By this method, the vibration solution can be obtained in the form of power series and the iterative computation is not needed.

本文首次将幂级数求解变系数微分方程的方法引入齿轮振动方程的求解中，从而不需要将齿轮变啮合刚度分段常数化和反复迭代求解，就可以求出齿轮的振动微分方程的解。

The simulation results indicate that the new algorithm is very efficient. The design of the exciting signal is also a key problem in system identification, especially for the nonlinear system identification. Firstly, a Kronecker product representation of the truncated Volterra series is utilized to analyze the persistent exciting condition of the input signal.

分析了为估计被分析对象的GFRF模型，而获得系统输入输出信息受到各种干扰污染的必然性，在将基于Volterra级数描述的非线性系统辨识归结为一最小二乘问题之后，提出了利用TLS算法来降低非线性系统输入干扰对辨识精度的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。