Design and implementation of the petrochemical information search engine with extensible retrieval function

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.