【摘要】 网络信息的日益增加迫切需要适宜的检索工具,特别是进行专业信息的检索,需要体现专业词汇特点的搜索引擎。本文在对搜索引擎核心技术进行研究的基础上,提出了石油化工信息搜索引擎的设计方案,开发了网络机器人模块,实现了海量网页的自动获取;采用最短路径分词和正向最大匹配相结合的算法,实现了中文自动分词;开发了信息索引模块,实现了网页的批量索引和增量索引;开发了信息检索模块,提供布尔逻辑查询,实现摘要自动生成。通过系统集成,初步建立了体现石油化工专业特点的搜索引擎。更多还原

【Abstract】 With the growth of network information quickly, it is urgent to develop a suitable retrieval system with the features of professional words. Based on the study of key techniques in search engine, a search engine structure of petrochemical information is proposed in this paper. Specified homepages can be found automatically from the huge WWW by using the web robotic module developed. Combining shortest paths Chinese words segmenting with positive-going maximum matching method, information index module for batch and incremental indexing and information search module for atuomatic generation of abstract with Boolean logical query are implemented. As a result, a petrochemical information search engine with extensible retrieval function is established preliminarily through the system integration.更多还原