3.3.1 文本分块·························································································26 3.3.2 特征提取规则·················································································28 燕山大学工学硕士学位论文 VI 3.3.3 基于启发式的路径搜索算法·························································29 3.4 数据稀疏问题的解决···········································································33 3.4.1 数据稀疏问题·················································································33 3.4.2 统计平滑技术·················································································34 3.4.3 数据稀疏问题的解决·····································································34 3.5 特征提取和启发式搜索算法的结合···················································35 3.6 论文头部元数据提取···········································································36 3.7 本章小结······························································································37 第4 章 融合重排序的引文元数据提取·························································38 4.1 引文元数据概述···················································································38 4.1.1 引文信息的提取任务·····································································38 4.1.2 引文元数据集的定义·····································································39 4.2 重排序··································································································39 4.2.1 相关概念的定义和表示·································································39 4.2.2 候选标注集合的产生·····································································40 4.3 特征选择和预抽取支持向量·······························································42 4.4 排序支持向量机···················································································44 4.5 引文元数据的提取···············································································46 4.6 本章小结······························································································48 |
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