判别模型和生成模型,总是混淆,找到个解释不错的
http://freemind.pluskid.org/machine-learning/discriminative-modeling-vs-generative-modeling/
Ng, A. Y., & Jordan, M. I. (2001). On Discriminative vs. Generative Classifiers: A comparison of logistic regression and naive Bayes. In NIPS (841-848).