==参考资料==
THE MATHEMATICAL THEORY OF COMMUNICATION，Claude E[1] The Mathematical Theroy Of Communication. 10th ed. Urbana: the Board of Trustees of the University of Illinois; 2015:3,4,6. Shannon and Warren Weaver
[2] Valiant L. Probably Approximately Correct，LESLIE VALIANTCorrect. New York: Basic Books; 2013.