Abstract : the second scalar analysis method to calculate the di ffraction efficiency of grating was described in detail , a simple effective approximation formula to calculate the diffraction efficiency of grating was educed . diffraction efficiencies were given and compared with scalar results , rigorous vector results 文摘:详细介绍了计算光栅衍射效率的二阶标量近似法,推导出一种简单有效的计算光栅衍射效率的近似公式.给出了利用近似公式对几种情况下光栅衍射效率的计算结果,并与普通标量法、严格矢量法的计算结果进行了比较
In the space , wavelet approximation formula and sampling formula are gived and these are simple and easy for calculation . it is a new attempt to establish mra in the reproducing kernel space . this not only makes up existing researchful defects but also gives a better method to resolve numerical approximation problems and it further enriches the reproducing kernel theory and wavelet method . this provides more applied method for resolving numerical approximation problems in the space which is often used in the engineering 在再生核空间中建立的多尺度分析方法是利用再生核工具探讨小波理论的又一次大胆的尝试,它不但弥补了现有研究的缺憾,而且给出了解决数值逼近问题的一个新思路,进一步丰富了再生核理论,充实了小波方法,这为在工程中常用的空间中解决数值逼近问题又提供了一种较为实用的方法。