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话题句识别中候选话题句评估函数的优化

Keywords: 广义话题,话题句,相似度,上下文相似性,局部相似性

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Abstract:

为了更好地解决汉语标点句句首话题缺失的问题,需要在话题句识别过程中优化用于评估候选话题句优劣的评估函数.为此,提出了话题句生成的上下文相似性特征、话题串与评述相邻接的局部相似性特征,并设计了相关的评估函数.实验结果表明:综合运用这2个评估函数,话题句识别的准确率提高了5.72个百分点.

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