基于最优化控制模型的文本主题域划分  

Text Subtopic-field Segmentation Based on Optimal Control Model

作　　者：王小芳[1] 王瑞芳[2] 张树功[1] 

机构地区：[1]吉林大学数学研究所,长春130012 [2]大连大学信息工程学院,辽宁大连116622

出　　处：《吉林大学学报（理学版）》2009年第4期769-776,共8页Journal of Jilin University:Science Edition

基　　金：国家重点基础研究发展计划973项目基金(批准号:2004CB318000)

摘　　要：提出一种基于最优化控制模型的文本主题域划分方法,采用主题域内距离、主题域间距离、主题域内夹角和主题域间夹角等相关要素,构建了最优化模型的目标函数,进而通过对模型求解得到文本主题域的最优划分模式.该方法为全局最优化方法,与具体的应用领域无关,具有较高的普适性.实验结果表明,在算法适用性、F1评价和Window Diff评价上,该算法均优于其他相关算法.A subtopic-field segmentation technique based on the optimal control model was proposed, the object function of the optimal control model was constructed by the within-subtopic-field distance, the between- subtopic-field distance, the within-subtopic-field angle and the between-subtopic-field angle. By solving the optimal control model, optimal subtopic-field segmentation is obtained. The method independent of specific application is a global optimal method. The experiments show that this method is better than other methods in applicability, F1 measure and Window Diff measure.

关 键 词：主题域划分 主题域内距离 主题域间距离 主题域内夹角 主题域间夹角 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]