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In this paper,the authors use these methods to calculate the fractal dimension of three diff...

本文在GIS支持下用Matlab实现了 3种算法，并用此法计算出了 3种地形的分形维数。

This method is convenient to calculate evacuation reliability when performance function of evacuation is complex and difficult to get differential coefficient.

我国目前的人员安全疏散评估大多应用"ASET—RSET≥0"的疏散准则[2]，其中ASET和RSET分别通过火灾动力学模型和人员疏散模型

We can calculate the differential cross section and found new physics and new matter state.

高能质子—原子核碰撞产生大质量轻子对的Drell-Yan过程类似于轻子—原子核深度非弹性散射过程，可以用于研究束缚核子的部分子分布。

Because the equation is a various coefficients second-order parabolical partial differential equation,explicit difference formats usually have high condition for stability. Implicit difference formats have good stability,but they must calculate a set of algebraic equations,which are too complex.

由于泥沙扩散方程是一个二维变系数的抛物型方程，对于多维的方程，显格式往往稳定性要求很高，而隐格式虽然稳定性较好，但它要解大型的代数方程组，工作量也非常大，为了克服这两种格式的不足，常用ADI法求解，但仍存在一些计算量偏大等不足之处，因此构造出更好的差分格式是有必要的。

Many problems in science can be eventually presented in the form of partial differential equations. Although the methods used to analyze and calculate the PDEs have particular advantages,they also have some shortcomings that need to be improved.

工程中的许多问题可以归类于求解相应的偏微分方程，传统的分析方法在具有其特定优点的同时，也有值得改进的地方；由于高架桥和轨道系统的复杂性和传统分析方法自身的局限性，运用小波分析这一新的分析方法对其动力响应进行分析，已被越来越多的学者所关注。

The finite differential method is used to calculate the temperature field.

在计算温度场的过程中引入了有限差分法。

Two different generators of the transformation are used to calculate. We obtain two groups of nonlinear differential equations about flow parameter and give the expression of the physical parameters.

采用两种不同的生成函数进行计算，得出两组关于流参数的非线性微分方程，给出了系统参数随流参数变化的表达式。

The main contents of this thesis are:(1) The new phase segregated current differential protection based on distributed parameter is proposed. The new protection can calculate the current at the fault point in real time, so its performance is hardly affected by distributed capacitance of transmission line.

本论文主要内容包括以下几个方面：(1)提出了基于分布参数的分相电流差动保护新原理，该原理本质在于实时计算线路的故障点电流，因此其性能基本不受分布电容的影响。

Appling least absolute deviation to calculate variable parameter of differential equation,robust grey model RGM(1,1) has been set up and used to forecast the settlement tendency of building.

将最小一乘法应用于微分方程变量参数求解，建立稳健灰色模型RGM(1，1)，并将其应用于建筑物沉降预报和比较。

Using the method we calculate the 〓 elasticdifferential scattering cross section, excitation differential scattering crosssection, and excitation cross section of electron collision with 〓 We transform the electron and molecule problem into electron problemby Born-Oppenheimer approximate. Mr Rossi, Dr. the Flinders University ofSouth Australia, calculated electron collision with molecule, but theexchange term he used become bigger and bigger as incident energyincreases, it is unreasonable, besides, the potential of electron and nucleus heused is somewhat rough. At present we correct these two terms. The potentialconsists of static potential, exchange potential, polarization potential.

电子与分子的碰撞过程的相互作用势主要是由静态势、交换势和极化势三部分决定的，这里对这三部分在动量空间中进行分波展开，推导出易于计算的表达形式，根据这些公式，并参考Rossi的弹性碰撞程序编写了计算电子与分子碰撞激发截面的程序，利用程序计算出势能矩阵元，通过求解Lippmann-Schwinger方程求得T矩阵元，便可求得散射截面。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。