The main problems of search engine

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Search differences: as a result of each search engine climb the strategy, and take different index, to heavy, sorting algorithm of the impassability, on the same key word use different search engine results of the difference is very big. Sometimes use the search engine result more satisfied, and sometimes use another search engine is better. So can consider comprehensive DuoGe search engine result of the inquiry, in order to achieve more satisfactory inquires the effect.
Personalized search engine problem: Web information retrieval system, usually as a large server program operating, and DuoGe user request response. The system can't according to the user's interest demand to customize the retrieval results. In fact, different fields in the background, the knowledge structure of the users of the retrieval results requirements are not the same. So should establish a suitable for the needs of the user with the customers' interest, change and dynamic adjustment of intelligent retrieval system.