Bayesian Approach 。PDFS i=27a{xA- whxiong@uestc.edu.cn 9whxiong@uestc.edu.cn PDFs Bayesian Approach 9 p(A b ) = 1 (2¼¾2 =N) 1 2 ¢exp ½ ¡ 1 2¾2 =N (A b ¡ A) ¾