This method is based on RST (rhetorical structure theory) analysis, thematic progression analysis and other linguistic methods. Vector space model and other statistical methods are also employed to inhance its robustness.

• 此方法主要基于 RST( rhetorical structure theory)分析、主位模式分析等多种语言学方法 ；还利用了向量空间模型等统计方法 .