LCA分析方法 作者提出并在实际的系统中对LCA方法进行验证，包括实验算法 实现参数 有一定的价值。-LCA analysis method the authors and in the actual system for verification of the LCA methodology, including the implementation parameters of the experimental method has a certain value.

LCA的tarjan算法，处理最近公共祖先问题-tarjan algorithm，due to deal with LCA problem