Mutual information-based correlation analysis of herbs against insomnia Analysis on principle of treatment of cough of Yan Zhenghua based on apriori and clustering algorithm Analysis on principle of treatment of phlegm retention syndrome of Ma Peizhi based on apriori and clustering algorithm Analysis on medication rule in prescriptions for hemoptysis of Menghe physician Ma Peizhi based on knowledge-discovery in database Analysis on medication principles for cough based on experience of Xu Di-hua, descendant of Meng He Medical School