Chen Xudong
Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117576, Singapore.
J Acoust Soc Am. 2007 Feb;121(2):743-4. doi: 10.1121/1.2405130.
This letter concerns the paper "Analysis of the time-reversal operator for scatterers of finite size" [J. Acoust. Soc. Am. 112, 411-419 (2002)]. The number of possible eigenvalues and eigenfunctions of the time reversal operator for a finite sphere given in the paper is much more than the correct number, which is proven to be the total number of multipole moments induced inside the finite sphere.
这封信涉及论文《有限尺寸散射体的时间反转算子分析》[《美国声学学会杂志》112, 411 - 419 (2002)]。该论文中给出的有限球体时间反转算子的可能特征值和特征函数的数量远多于正确数量,已证明正确数量为有限球体内诱导的多极矩的总数。