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However, because the server cannot get the Referer at all times, it cannot be used as the main means of CSRF defense.The most famous defense against model theft attacks is PATE (https://arxiv.org/abs/1802.08908), a privacy framework developed by Ian Goodfellow et al. As shown in the above figure, the key idea behind PATE is to divide the data and train multiple combined models to make decisions. This decision was then masked by noise from other different privacy systems.One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.　　这是一个关于爱与背叛的故事，讲述一对三十多岁的中产阶级夫妻，当他们开始对其他人产生欲望，两人的性关系开始变得紧张。老铁有三个徒弟，大徒弟谢思雨有文化，老铁当初收他为徒也正是因为他有文化又踏实好学；老铁的二徒弟欧阳水是个憨厚的人，同时又是老铁过去深爱的女人的侄子；三徒弟许风是师傅老铁开始的时候最讨厌和抵触的家伙。由于风很小的时候父母就到非洲援建，忽略了教导，于是风渐渐的变成了远近闻名的打架大王。后来因为父母在援建过程中不幸双双遇难，作为烈士后代的风勉强被厂里特招进了厂子，并且成为了老铁的徒弟。为怕那绿玉串奔跑间失落，林聪特地将它紧紧地跟头发绑在一起。这夜，渭州一家大宅院里，一名披头散发的女子从被窝里爬起来，手中握着染血的短刀，屋主刁四虎已血溅当场另一夜，广州首富许建欲将一名女子推倒床上，却发现死神已在向他招手池州富商周琦这夜娶妾，翌日却被发现遭乱刀杀死包拯正自沉吟。他出巡池州，遇上周琦一案，调查间竟发现案中有案——三名死者似并不相识，但都死于新婚之夜，而血案发生后新娘子均无所踪。更奇怪的是，死者都是富商，性好女色，全死于卧房，且致命原因并非刀伤，而是中了黑寡妇蜘蛛毒毙命。包拯到广州省亲，并着手调查毒蜘蛛案，发现三名死者原是扬州结拜兄弟，而当地首富收发巴人杰、巴人凤，亦是一伙，巴氏兄弟更勾结知府师崔禄，阻挠调查。此时广州万花楼新来了一名色艺双全的名妓海棠，引得好色的巴人杰垂涎。这天海棠偕侍女秋儿遭人当街调戏，幸得展昭解围，展护卫被冷艳的海棠迷倒，稍后方知对方原为青楼名妓。难解相思之苦的展大侠向海棠提亲，奈何伊人早将女儿私情置之度外，不惜以鲜血饲养毒蜘蛛，为十二年前的一桩悬案报仇