检验函数 meaning in English
test function
testing function
testingfunction
Examples
- An embedding theorem for space of distributions onlocally convex space
局部凸空间上检验函数与广义函数空间的嵌入定理及其应用 - The theory of the method of moments ( mom ) is introduced firstly in the thesis , and some basic functions and testing functions are discussed , then how to compute the radar cross sections of two - dimensional conducting objects are also introduced
论文首先介绍了矩量法的基本概念及基本基函数和检验函数，其次阐述了矩量法求解二维导体目标雷达散射截面的步骤。 - In chapter one , we propose a new mixed method called characteristics mixed finite element method for a convection - dominated diffusion problems with small parameter e : we handle the convection part whth backward difference scheme along the characteristics , obtain much smaller time - trunction errors and avoid numerical dispersion on the front of the peak curve of the flow : we use a lowest order mixed finite element method to deal with the diffusion part , so this scheme can approximate the unknow function and its following vector with high accuracy at the same time
第一章中我们对小参数对流占优扩散问题提出了新的数值方法? ?特征混合有限元方法，即对方程的对流部分采用沿特征线的后退差分格式求解，以保证较小的截断误差限并避免了在流动的锋线前沿数值弥散现象的出现；对流动的扩散部分采用最低次混合元方法求解，以保证格式对未知函数及伴随向量的同时高精度逼近。由于该方法中检验函数可取分片常数，此格式在某种意义上具有局部守恒性质。 - The material ways are to model the honeycomb wall as an impredence surface , to express the infinite honeycomb by using periodic green ' s function , and using method of moment to establish the mathematic model , in applying the methods of moments , we choose the roof function as basic function and choose the razor function as test function ; by equating the incident field to sum of the scattering field and impledance field ; we will set up the integral equation for the surface current , solving it by mom equation . then gain it ' s reflected coefficient ' s numerical result . and we propose first the definition of the equivalent electromagnetic parameters and present a method to calculate them from the gained reflection coefficient
具体方法就是将浸渍吸收剂的蜂窝壁用表面阻抗表示，将无限大的周期结构的电场用周期格林函数来表示，选取有耗蜂窝结构中具有代表性的基本计算单元应用矩量法建立数学模型,在运用矩量法时用屋顶函数作为基函数，刀片函数作为检验函数，根据蜂窝壁表面电场必须满足入射电场等于散射电场和阻抗电场之和的规律，推导表面电场积分方程，求解蜂窝结构的表面电流，利用蜂窝的周期规律得到无限大均匀周期阵列的散射电场。 - The moment method is used to calculate the rcs of three - dimensional targets in this paper . these targets include conducting targets , dielectric targets and coat targets . triangular patches are used to model the surface of the target , then electric field integral equation ( efie ) and magnetic field integral equation ( mfie ) are built which satisfy the boundary conditions . the rwg vector base functions are used to denote equivalent electric current and magnetic current on the surface of the target . finally use the galerkin method ( rwg vector base functions are basis function and test function ) to transform integral equations into matrix equation . when obtain the equivalent electric current and magnetic current , we can calculate the scattering field and the rcs of the target
本文利用矩量法计算了三维导体目标、介质目标、涂层目标的雷达散射截面。首先采用三角形面元对物体表面几何形状进行模拟，然后建立满足边界条件的电场积分方程( efie )和磁场积分方程( mfie ) ，将物体表面的等效电磁流用rwg矢量基函数表示，最后利用伽略金法( rwg矢量基函数既作为基函数又作为检验函数)将电磁场积分方程转化为矩阵方程求解未知电磁流系数，得到了表面的等效电磁流后，可以计算散射场和目标的雷达散射截面。