说明：  多元散射校正算法，用于近红外散射数据处理，增强信噪比
(function [Xcorrect]=msc(X,Xref) msc pretreate the samples X with the Multiplicative Scatter Correct Input X:the matrix of the sample spectra to be Correct Xref:the matrix of the sample spectra to be ref Output Xcorrect:the sample spectras was Corrected from the X Programmer: zhimin zhang @ central south university on dec 13 ,2007 Reference: Chemometrics and Intelligent Laboratory Systems 29 (1995) 233-241)