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【答案】应助回帖
unitjava(金币+10, 翻译EPI+1): 谢谢，学习了 2011-11-27 11:36:37
The retrieval of the key words applies the standard IR sorting method, i.e. cosine vector measuring method SIR as shown in equation1. The idf(t) in the equation is the number of documents which include t.
After adding the characteristic information, the kinds of characteristic information increased and the consuming time is more than that of the pure key words searching. From the comparison, the time efficient has somewhat reduction, but in an acceptable range for the users.
The retrieval results were analyzed and compared through the assessment criteria of the average recall ratio and average precision ratio, and in the aspect of the average consuming time. |
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