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IV. Application Value of BIM Technology in Operation and MaintenanceThe first packet discarding scheme will have a slight impact on the user experience, because discarding the first packet retransmission will increase the response time of the service. In view of this, a better TCP Proxy scheme has been developed. All SYN data messages are accepted by the cleaning equipment and processed according to the SYN Cookie scheme. The IP address that successfully established the TCP three-way handshake with the device is determined to be a legitimate user to join the white list. The device disguises the real client IP address, completes the three-way handshake with the real server, and then forwards the data. However, if there is no IP address that shakes hands with the device three times within the specified time, it is determined that the malicious IP address is blocked for a certain period of time. In addition to SYN Cookie combined with TCP Proxy, the cleaning equipment also has the ability to detect a variety of abnormal TCP flag bit packets, and identifies normal access and malicious behavior by returning unexpected responses to SYN messages to test client responses.1937年，日军侵略直指南京。爱国资本家公子不羁正气的关鹏为照顾姐姐留下，并结识国军营长沈汉杰。两人虽相互欣赏又因关鹏姐姐的死产生误会。关鹏欲沈汉杰报仇之时，南京城破，他亲眼目睹了惨绝人寰的中华门大屠杀。沈汉杰将身负重伤的关鹏救出。得知实情后的关鹏放下个人仇恨，发誓要给乡亲报仇。因成功截获情报送至新四军根据地，关鹏和沈汉杰都受到赏识，决定留下加入抗日的大队伍。在漫长的抗日斗争中，沈汉杰的鼓励，领导的培养，以及自己的聪明才智，使关鹏逐渐从公子哥成长为合格新四军指战员。他和革命战友沈雁也从欢喜冤家走向了爱情。危急关头他带领新四军突击连，血刃日本作战指挥野村。经过八年浴血奋战，抗日战争迎来了最后的胜利。律师肖关鹏在出差途中与自己的客户丛芳菲发生了超朋友关系。事后他极度后悔，并向妻子叶霜坦承真相。肖关鹏经过决择，决心与丛芳菲分手，但是一个事实摆在面前，丛怀孕了。叶霜知道后，一气之下将肖关鹏赶出家门，岳母也到单位大闹，致使事态越发严重。丛前男友姜大伟出面，表示自己愿意接纳丛。就在二人蜜月旅行时，两人不幸遭遇车祸，大伟离世，丛失去了孩子，双目暂时性失明。备受打击的丛失去了生活的信心。叶霜不计前嫌，将其接入家中照顾。不料丛却对肖关鹏产生了依赖性，即使恢复视力后也伪装失明。肖关鹏面对两个女人，十分痛苦。叶霜提出离婚，成全丛与肖，遭到肖强烈反对。面对痛苦的肖，丛良心复苏，选择离开，一个人离开了这座城市。可惜这不是真的。一年后，当一名倭女子抱着一个胖娃娃出现在汪滶面前的时候，汪滶终于怂了。正好秋收刚过，百姓家中余粮较为充足，很多人队伍都是满载而归。