计算机科学 ›› 2015, Vol. 42 ›› Issue (10): 239-243.
魏小梅,黄 钰,陈 波,姬东鸿
WEI Xiao-mei, HUANG Yu, CHEN Bo and JI Dong-hong
摘要: 从生物文献中抽取生物事件对于生物领域的知识挖掘起着重要的作用,而事件触发词的识别是生物事件抽取的一个关键步骤。系统分别采用词汇及其上下文特征、短语标记特征、词聚类特征以及统计的词典特征构造不同的基于词级的CRF模型,用于生物事件触发词的标记。然后针对不同的触发词类型选择对应最优的标记模型,构造了一个混合CRF模型。在BioNLP 2009 ST语料库上进行了实验评估,结果表明提出的方法取得了很好的性能,为生物事件的抽取建立了良好的基础。
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