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In practice, we often see some of the most advanced groups of spammers trying to derail Gmail filters by reporting a large amount of spam as non-spam. As shown in the figure, from the end of November 2017 to the beginning of 2018, there were at least four large-scale malicious actions trying to distort our classifier.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 ~　　《木府风云》讲述了明代云南纳西木氏土司在当地统治时期，木氏家族内部腥风血雨的争权夺势和权力更迭的的恩怨情仇。秋瓷炫在剧中饰演木府家族的女当家人也是血刃仇敌阿勒秋，她身负家仇潜伏木家二十年，心机城府极重，却褪不去天生的善良纯真。与木家嫡孙木增相爱不能相约殉情，却在最后一刻悬崖勒马救人性命。经历重重磨难嫁给爱人木增后忍辱负重与各色势力人物斡旋暗斗，带领木家突围困境，最终获得信任和尊重，化解仇恨成为木府当家女主人，书写了一段传奇女子的情仇爱恨故事。"You said 'similar'? Does it mean that in addition to the unknown creatures that attacked you twice before, there are new unknown creatures' participating in the war '?" I asked.黄瓜看着这个细瘦的小女娃，巴掌大的小黄脸儿，全没有这个年纪小孩子该有的水润光泽，倒凸显得眼睛十分大。　　莉拉玉为了与纳克林复合，想将纳克林身边的女人们挤走，发现纳克林对彤露的不同后，骗差萌说纳克林喜欢上了彤露，差萌发现自己被好闺蜜背叛后伤心不已，警队队长特塔木及时给予了安慰。纳克林和彤露熟悉后，被彤露的认真和好意打动，设计了好些事情试探彤露。某天邻居发现送彤露回家的纳克林有老婆后，彤露被冠上了“小三”的罪名。明川，鹏海市法医中心主任，性格古怪，专业超群，在当地法医领域是个绝对权威。当明川站在尸检台前，他就成了鹏海市远近闻名的“听尸者”。适时，光明市又发生一起干尸案，凶手似乎受过专业训练，反侦察能力极强，被称为“杀人医生”。光明市女刑警队长罗笔芯认为“杀人医生”是警察系统内部人员的可能性很大，并将目光锁定在临市的明川身上…罗笔芯决定彻查明川和“杀人医生”案的关联，并开始调查明川神秘的经历和背景，随着调查的深入，一个深埋多年的秘密终于重见天日……