| Search engine is the main tool for people to retrieve information from Internet. It plays an important role for people to find information from Internet quickly and accurately. But, because the technology and target customer of the search engine is different, the performance varied considerably among them. So, a reasonable evaluation of search engine is not only good for our users but also good for search engine developers. Many current evaluation methods are mainly on description, it can't evaluate the search engine in a systematical and comprehensive way. Therefore, the establishment of a comprehensive evaluation system for search engine, it is very important for us to evaluate the search engine through qualitative and quantitative analysis way.This thesis consolidated the search engine evaluation system of many scholars. Made a relatively scientific and rational of evaluation system by integrated other ideas about it.Make a more detailed comparison and evaluation of Google Chinese, Yahoo China and Baidu by using this evaluation system, mainly on the database size and content, search function, search results and user interface. Make it more convenient for people to learn and choose search engine.Collected 10 search topics and searched them in Google Chinese, Yahoo China and Baidu. By using this system, analysised the relevance of the previous 20 search results and calculated the accurate rate of the previous 20 search results. The results showed that the search performance of Google Chinese is better than Yahoo China and Baidu.Give the reason that the retrieval performance of Yahoo China and Baidu is lower than Google Chinese: bid ranking. Although the bid ranking can make profits for the search company in a short period of time. However, it is not good for the search company in the long-term perspective, because the bid ranking affected the search experience of internet users. |
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