机器学习(Machine Learning, ML)是一门多领域交叉学科，涉及概率论、统计学、逼近论、凸分析、算法复杂度理论等多门学科。专门研究计算机怎样模拟或实现人类的学习行为，以获取新的知识或技能，重新组织已有的知识结构使之不断改善自身的性能(Machine learning (Machine Learning ML) is an interdisciplinary subject, involving probability and statistics, approximation theory, convex analysis, complexity theory and other disciplines. Devoted to the study of how computer simulation or the realization of human learning, to acquire new knowledge or skills, knowledge structure has been reorganized to continually improve their performance)