two dimensional method

With dielectric constant distribution function of Fourier coefficients as a foundation, we calculated the arbitrary shape two-dimensional photonic crystals' bandgap structures by PWM ( Plane Wave Expansion Method).

有了介电常数分布函数的傅立叶展开系数做基础，用平面波展开法计算了任意形状二维介质光子晶体的带隙结构，求解带结构的主要方法是通过计算本征方程的特征根。

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These applications are two dimensional electromagnetic plasma with particle-in-cell method program ( 2D-CIC), tracer interfaces moving grid method program ( YGX), three-dimensional supersonic complex base flowfields numerical simulation ( TXD).

这三个程序分别是二维电磁等离子体粒子云网格法程序（2D-CIC），跟踪界面活动网格法程序（YGX），三维高超声速流场数值模拟程序（TXD）。

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Mixed finite element method along characteristics for two dimensional incompressible Navier-Stokes equations

二维不可压Navier-Stokes方程的特征混合有限元算法

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On the basis of the dimensional method, the practical two or dimensional method is developed.

并在一维问题的固结简化计算方法基础上建立了二、三维的简化方法.

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Purpose To compare two dimensional method ( 2D) and three dimensional method ( 3D) with spiral CT for measurement of femoral neck anteversion ( FNA).

目的研究比较螺旋CT二维法和三维法在小儿股骨颈前倾角（FNA）测量中的应用价值。

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A kind of one dimensional integration method based on golden division and bifurcation for two dimensional integration is presented. Using this method, the current density voltage curve of RTD can be calculated with high speed and precision.

提出了一种基于黄金分割法和二分法寻查思想的一维积分来实现二维积分的方法，此方法能迅速而精确地计算RTD电流密度－电压曲线适用于RTD及其电路的计算机辅助设计。

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A two dimensional mathematical model for ingot solidification has been established and new methods such as revised temperature recovery method, mean boundary radiation thermal flow and variable time-step length by zone have been applied in this paper.

本文建立了钢锭冷凝过程的二维数学模型，采用了修正温度回升法、平均边界辐射热流、分区变时间步长等新方法。

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In this paper, the two dimensional sound field is analysised by boundary element method and numerical formulars are brought out after three different procedures are compared.

本文将边界元法应用于二维声场分析，给出了以第二类汉克尔函数为基本解的数值计算公式，比较了处理奇异积分的三种不同方法。

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Methods: To apply the method of discrete tendency and central tendency, and the data points' distributing characters of two dimensional graph.

方法：运用离散趋势和集中趋势相结合的方法，并通过二维图形中数据点的分布特征对项目的非共识情况进行分析。

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A method for measuring two-dimensional unsteady flow velocity with x-hot-wire probes

用X热线探针测量二元非定常流速度的方法

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