maximal tree meaning in Chinese

最大树生成树

We also place emphasis on research of apriori and fp - growth algorithm and compare the performance of two algorithms . secondly , we do research on concepts of structured and nonstructured data , actual state and problems of tree structure mining , and freetreeminer algorithm theory . we also study canonical form and pre - processing technologies of free - tree , concepts and properties of closed and maximal tree , and pruning , growing and mining of tree structure
其次,研究了结构化与非结构化数据的基本概念、树结构挖掘的研究现状、现有树结构挖掘技术存在的问题、 freetreeminer算法及其基本思想,重点研究了free树的规范化和预处理技术、封闭频繁子树和最大频繁子树的概念和性质、树结构的剪枝和生长技术、树结构的挖掘技术。