In most studies , in order to simplify the physical treatment , the laser beam is usually treated as a plane wave and normal incidence is supposed when its transmission through a fpf is considered 对于光脉冲通过法布里一拍罗滤波器后的时域和频域特性己有不少报道，然而我们注意到，在这些研究中激光通常被当作平而波。
The finite element method incorporated with floquet theorem is used to solve the 2 - dimentsional scattering problem of dielectric electromagnetic bandgap upon which a plane wave is oblique or perpendicular incident 采用有限元和floquet定理相结合的方法，对不同参量的二维介质电磁带隙ebg结构的反射和传输特性进行了研究。
In the section 3 , we calculated the threshold and efficiency of double resonance oscillator ( dro ) in plane wave of clbo ; we also got the efficiency curves of clbo in gaussian beam 第三章分析和数值模拟计算了平面波双谐振情况下clbo晶体的振荡阈值和转换效率曲线，同时给出了高斯光束的转换效率曲线并与bbo晶体进行了比较。
Using the plane wave expansion method , from the computation result for the band gaps structure of infinitd periodic one dimension phononic crystal , it is found the width of the first gap relates with the material portion ratio 利用平面波展开法，计算一维无限周期结构声子晶体的带隙结构，发现每一带隙的宽度与材料的组份比有关。
The sub - domain is used to solve the entire equivalence current integral equation . two sub - domain basis functions are adopted respectively to calculated the rcs of electrically large metallic plate in plane wave illumination 分别采用脉冲基点匹配法和rwg基伽略金法求解电大金属平板在平面波照射下的rcs ,并对二者的结果进行了比较和分析。
Type plane wave incidence and the input admittance of cylindrical monopole antenna , it is testified that the proposed method is more accurate than the conventional square contour integration method 型平面波的散射电流以及单极细圆柱形天线的输入导纳，对所提出的方法作了验证，证明了该方法比常用的矩形积分回路法对细导线上电流的模拟要精确得多。
When the plane wave returns and crosses the molecule , it produces an interference pattern with the stationary part of the electron wave function , like two trains of water waves crossing and forming a checkerboard disturbance 一旦平面波折返并横越过分子，它便会与待在轨道上的电子波产生干涉图样，就像是两道水波相遇所形成的西洋棋盘般明暗交错的扰动。
In view of that the plane wave theory is suitable only in lower frequency range , the three - dimensional finite element method is applied to analyze the acoustic characteristics of air cleaner in the present study for broadening the frequency range 由于一维平面波理论只适于低频分析，为了扩大分析的频率范围，采用了三维有限元数值方法分析空气滤清器的声学特性。
On computational methods in photonic crystal finite difference time domain method ( fdtd ) and plane wave expansion method ( pwe ) are widely used in calculation the dispersion relation of the photonic crystals 光子晶体计算方法的研究用于计算光子晶体的计算方法中，有限时域差分方法( fdtd )和平面波展开方法被广泛使用，我对这两种方法都有所研究，也有所突破创新。
The content of this dissertation is focused on the scattering of dielectric randomly cone - shaped surface and organized as follows , and the scattering characteristic of plane wave incidence on rough surface is systematically investigated 本文主要围绕有限介质锥面的散射特性展开研究,并系统地研究了平面波入射粗糙平面散射特性。首先阐述了课题的研究背景、意义和国内外发展概况。
