The attacker first completes the three-way handshake to establish the connection, but in the last ACK reply of the three-way handshake, the TCP window size is set to 0, and then a data request is made. When the attack target sends the request result to the attacker, it stops the data transmission when it finds that the TCP window size is 0, and sends out a TCP window detection packet to ask the attacker if the TCP window has been updated. Since the attacker will not update the window size, the attack target will always maintain the TCP connection and wait for the data to be sent, and continuously carry out TCP window size detection. When the number of controlled hosts in the botnet is large, Target's connection table will gradually be exhausted, resulting in denial of service.For codes of the same length, theoretically, the further the coding distance between any two categories, the stronger the error correction capability. Therefore, when the code length is small, the theoretical optimal code can be calculated according to this principle. However, it is difficult to effectively determine the optimal code when the code length is slightly larger. In fact, this is an NP-hard problem. However, we usually do not need to obtain theoretical optimal codes, because non-optimal codes can often produce good enough classifiers in practice. On the other hand, it is not that the better the theoretical properties of coding, the better the classification performance, because the machine learning problem involves many factors, such as dismantling multiple classes into two "class subsets", and the difficulty of distinguishing the two class subsets formed by different dismantling methods is often different, that is, the difficulty of the two classification problems caused by them is different. Therefore, one theory has a good quality of error correction, but it leads to a difficult coding for the two-classification problem, which is worse than the other theory, but it leads to a simpler coding for the two-classification problem, and it is hard to say which is better or weaker in the final performance of the model.2000年 ルパン三世1$マネーウォーズ 一美元战争Anyway, Those 20 minutes are really like years for every minute. After that, there were several repeated exchanges of fire. Anyway, there are more or less injuries, Especially the purple venom, It's terrible. You have to peel off a layer of skin when you touch it. Fortunately, with Wang Yuanhe's experience, everything that is splashed is covered with floating soil. However, there is no good way to be bitten by that kind of monster like a dog. You can only do it hard. These two strange things have left some marks on my body, which is regarded as a "souvenir" for me to take part in the war. " When Zhao Mingkai said this, First he collapsed to hold the trouser leg of his left calf, When you pull it under your knee, put it on one side of your leg. Motioned me to look, Only then did I find out that there was a defect the size of an adult fist in his calf. The skin on it is wrinkled, Don't think, according to what he said before, This must have been caused by a dog-like "living biological weapon" bite, And after showing the bruises on his legs, He showed me the tiger's mouth on his right hand again. There is also a large scar on it, According to what he said, he was splashed with the purple venom in the last battle before the artillery group resumed firing. At that time, the epidermis quickly dissolved and rotted, so that the thumb ligament inside could be seen. However, the rescue was timely and the hand was saved. However, the scar with such a large area and a large depth could never be removed. In his words, this is also a special "memorial".富家俊少李睿与率真美女康优雅的婚礼盛大而豪华，婚礼进行中，优雅却无意发现姐姐康悠然与李睿的私情，突如其来的打击，令优雅悲愤地逃离了婚礼现场……年轻的整形外科医生谢阳在显贵芸集的婚礼上推介自己，结果一无所获。令他欣喜的是妻子包丽娜怀孕并生下女儿谢小晴。但不久，包丽娜就为了自己的事业弃谢阳父女出国深造去了……绝望的优雅离家出走。独居上海与优雅的父亲断绝兄弟关系的满叔叔收留了优雅。一场离奇的车祸使优雅索性宣告“意外身亡”。噩耗传来，李睿悲伤不已，悠然在父母眼中成了害死妹妹的“元凶”，悠然带着内疚去了大洋彼岸……优雅意想不到的是自己怀孕了，而且由于身体原因不能做流产手术。优雅被迫接受了这样的现实，当儿子康皓降世后，她似乎看到了新的生机和希望……七年后，悠然归国。在优雅的墓碑前与李睿不期而遇，一直深爱李睿的悠然终于如愿以偿了。当她走进李睿的生活中才发现，优雅的影子无处不在，她不过是优雅的替代品而已。在李睿心里，优雅依然如故，因为优雅是唯一弃他而去的姑娘……七年中，优雅帮满叔打理罗兰咖啡同时坚持自学杀人获得的是土地和利益，可是对于我而言，不过是因此造成了更多的杀戮和伤亡。张大栓也生气了。
