摘要： //本学习笔记只是记录，并未有深入思考。 1.什么是数据挖掘？ 数据挖掘是数据库中发现必不可少的一部分。 数据预处理主要包括（可能是最耗时的步骤）： 1.融合来自多个数据源的数据 2.清洗数据以消除噪声和重复的观测值 3.选择与当前数据挖掘任务相关的记录和特征。 2.数据挖掘要解决的问题 1.可伸缩 阅读全文

摘要： Forbes magazine publishes every year its list of billionaires based on the annual ranking of the world's wealthiest people. Now you are supposed to si 阅读全文

摘要： Unlike in nowadays, the way that boys and girls expressing their feelings of love was quite subtle in the early years. When a boy A had a crush on a g 阅读全文