Research And Implementation Of A Patient Demand Oriented Medical Search Engine

With the rapid development of the Internet and increasing of the information, people's need of a particular area is becoming increasingly difficult to be met. Topic search engine shows up and it helps people to get more accurate and valuable information.The purpose of the paper is to propose a design idea of a patient demand oriented medical search engine. Through modifying related modules of open-source search engine Nutch the search engine is basically completed based on the technology of user modeling and the design of topic crawler.Firstly this paper introduce the development of general search engine and topic search engine, and also the technology of user demand modeling. Then introduce the architecture of topic search engine and how Nutch works in detail, and research on the core of topic search engine that the crawl strategy, after the web page text processing and automatic classification and also Chinese word segmentation are introduced. In the part of user demand modeling which is the core of subject firstly proposed an improved text feature extraction, then the design of intelligent multi-domain model of user demand which is used in the search results matching based on multi-domain demand and forget factor. Then this paper subsequently focused on Chinese segmentation module and topic crawler design model, and implements patient demand oriented medical search engine, then evaluate the search result. Finally summarizes this paper's work and points out the direction of the subject.