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Use reasonable data sampling: It is necessary to ensure that a small number of entities (including IP or users) cannot account for most of the model training data. In particular, care should be taken not to pay too much attention to false positives and false negatives reported by users. This may be achieved by limiting the number of examples that each user can contribute or using attenuation weights based on the number of reported examples.At first hearing Ding Rui talk about the word "death experience", He Yihe thought it was another project of "rich people's middle-aged crisis burning money" and scoffed at it. However, the ideas of Huang Weiping and Ding Rui finally persuaded him to stay and become the designer of the experience process.In an interview with Kaggle, he shared his experience in participating in the competition and also talked about many combat experiences in machine learning competitions. Quantum bits are transported here. The following is the translation of the interview:The path is shown in the following figure:Leonard(Johnny Galecki 饰)和Sheldon（Jim Parsons 饰）是一对合起来智商超过360的疯狂科学家宅男。他们的科学家朋友还有风流的Wolowitz（Simon Helberg 饰）和从来不和女人说话的印度人。最近，科学家宅男的对门搬来一个美女剧作家兼餐厅招待，Penny（Kaley Cuoco 饰）。宅男开始蠢蠢欲动了，于是诸多啼笑皆非的故事在几个朋友间“爆炸”开来。Next, start exporting dry goods.樱桃小区的两位大妈，能歌善舞，热爱生活，她们利用自己的专长，在社区开始了令人啼笑皆非的的退休生活。并肩携手的两姐妹除了应付广场舞队时有时无的压力外，同时也在吃力的面对着生活中的各种新问题，她们遭遇网恋诈骗、深陷伪养生理论……大妈们的生活智慧永远不可小觑，同时也收获了与家人朋友之间共患难的真情。