Besides Syntax structure, lexical semantic features are also closely related to semantic roles. Therefore, lexical semantic features could help solve the problems that could not be welldone only by syntax features. In this paper, some lexical semantic features such as valency number, semantic class of subject and object are introduced according to the Peking University semantic dictionary CSD, The 10fold cross validation results show that, by applying the semantic dictionary, the overall Fscore increases by 1.11%. And the Fscore of Arg0 and Arg1 reach 93.85% and 90.60% respectively, which are 1.10% and 1.26% higher than the results only depending on syntax features.%语义角色除了受句法结构限制之外,同词汇的语义特征也有着紧密的内在联系.对于一些仅依靠句法分析不能很好解决的角色标注问题,如句法结构相同的两个成分所对应的角色分别为完全不同的施事、受事角色的情况,可以通过引入一些词汇语义特征来进行处理.该文基于北京大学的语义词典CSD,引入了配价数、主客体语义类等词汇语义特征来进行语义角色标注研究.10折交叉验证的结果显示,通过引用词汇语义特征,所有角色标注的总体评价F值比单纯使用句法特征上升了1.11%,而其中Arg0和Arg1角色标注的F值达到93.85%和90.60%,比仅使用句法特征进行角色标注分别提高了1.10%和1.26%.
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