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Information Theory: I forget which publishing house it was. It is a very thin book and it is very good. There is a good talk about the measurement of information, the understanding of entropy and the Markov process (there is no such thing in the company now, I'll go back and find it and make it up). Mastering this knowledge, it is good for you to understand the cross entropy and relative entropy, which look similar but easy to confuse. At least you know why many machine learning algorithms like to use cross entropy as cost function ~朱彤（牛莉饰）是博德女子学院的一名女教师，恋人为救落水儿童离开了人世，她一直生活在对已逝男友海林的追忆中。校体育馆理员秦小宝（姜武饰）对朱彤不知不觉中坠入了暗恋的爱河，将母亲留给自己的“长命锁”模仿朱彤心仪的款式精心打造成手镯，带给她意外的惊喜，他不畏情感“险阻”勇敢地与风度翩翩、貌似海林的成功男人吕亦齐公开竞争。对音乐一窍不通的他拜师苦练，在电视征婚的录制现场，他对朱彤大胆地真情表白。某日，约翰载着布兰登，开车行驶在回家的道路上，两人将车暂时停在了一间加油站处，殊不知这一举动彻底改变了他们的命运。在加油站，布兰登遇见了乔（马特·欧莱瑞 Matt O'Leary 饰），后者是黑帮领袖比利（加内特·赫德兰 Garrett Hedlund 饰）的弟弟，拥有着和哥哥一样凶残冷酷的个性，约翰脑海中有关儿子最后的影像，是他倒在血泊之中的模样。重重波折之后，法院释放了乔，因为凯文决心亲手替儿子报仇，曾经平凡而又和善的男人，义无反顾的踏上了一条充满了暴力和鲜血的道路。　　车王李一飞面对自己的赛车成绩和家人的牵挂，最终认清事实，决定退居幕后，让莉莉与杜杰克组成搭档。当一切即将步入正轨时，新的矛盾却诞生了。