面向应急预案的主题抽取研究 关键词 主题抽取，词汇链，语义相关，应急预案 [gap=1045]Keywords Subject Extraction, Lexical Chain, Semantic Relatedness, Emergency Plans
基于10个网页-相关网页
... Document Automatic Categorization [自动分类] Subject Extraction [主题提取] Information Retrieval [信息检索] ...
基于10个网页-相关网页
At present, Keyword Extraction is an important technique used for automatic abstract, automatic classification, subject extraction, subject word extraction etc.
目前，由于计算机在自然语言理解方面还有很大的不足，关键词提取是在进行文本自动摘要、文本自动分类、主题词提取、主题提取等凡是涉及到文本信息理解的工作时，都要应用到的一项关键技术。
参考来源 - 基于WEB页面的关键词与关键概念提取技术·2,447,543篇论文数据，部分数据来源于NoteExpress
Subject extraction from a text is very important for natural language processing.
从文本中提取主题串是自然语言处理的重要基础之一。
Chinese word segmentation is always the first step of subject extraction. The quality of word segmentation is effective to the quality of text subject extraction.
而主题提取是以中文分词作为第一步，分词质量直接影响到文献主题提取的质量。
Finally, an experimental was carried out which compared the human subject extraction results to our system result, and the recall and the precision showed that our model do a good job.
最终，通过与人工主题词抽取的实验结果相比较，该主题提取模型在查全率和查准率上都取得了较好的效果。
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