针对模型的特点及其边界条件用差分法分别进行了数值计算，结果表明陷落柱氡气场的空间形态分布特征。
The numerical computations have been made using difference method for difference characteristics and boundary conditions. The computation results show the state features of radon field in space.
本文运用差分法求解了聚焦超声加热的二维稳态温度场，比较了声场与温度场的特征，分析了耦合层厚度与治疗区大小、位置的关系。
Characteristics of sound field and temperature field, and the relation between the width of coupling layer, the size and the position of treated area are presented.
因此，通过不同环境的试验得到雷达图谱特征，并利用二维时域有限差分法对其进行正演模拟。
Thus, we obtained characteristics of radar images by experiments in different environment, and implemented forward modeling using two-dimension finite difference time domain method.
首先，通过特征线法和有限差分法得到了时间离散和空间离散的非线性状态方程。
First, the partial differential equations are transformed into discrete space, discrete time nonlinear difference equations through characteristic method and finite difference approach.
这种模型属于具有活动边界的非线性问题，分别用特征线法和有限差分法求解，得到了含水饱和度分布和活动边界的变化规律。
Characteristic solution and finite difference solution are derived respectively and water saturation distribution curves are presented and the law of the moving boundary is found.
该模型由一传热子模型和一流动子模型耦合组成，分别用有限差分法和特征线法求解。
The solution of the heat transfer submodel is worked out by the finite differential method; while the solution of the flow submodel is worked out by the characteristic method.
在检测运动物体方面，根据检测对象(接触线)的运动特征提出了一种对图像序列数据采用时态差分法与模板匹配相结合的检测方法。
In the detection of motion objects, a method based on movement feature of target (catenary) is proposed. It combines temporal differential method and template matching in image sequence data.
采用时域有限差分法对T形结、十字结进行模拟分析，提取平面传输线不连续性结构的特征参数——主模散射参数、色散特性等。
Different characteristic parameters of planar transmission line discontinuities are extracted by FDTD arithmetic, such as scattering parameters of dominant mode and dispersion parameters.
分别运用特征线法和有限差分法求解，得到了含水饱和度分布和活动边界的变化规律。
Characteristic solution and finite difference solution to the model are derived respectively and water saturation distribution curves are presented.
分别运用特征线法和有限差分法求解，得到了含水饱和度分布和活动边界的变化规律。
Characteristic solution and finite difference solution to the model are derived respectively and water saturation distribution curves are presented.
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