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Put the predicting query performance(PQP) into the query fusion and construct a new adaptive information retrieval system(QAAIR) based on performance analysis in the base of analyzing the method of PQP for IR system and expound the main technique. The experiment adopted testing data of TREC Web track show the method can improve the effectiveness of query and overcome the robust of information retrieval.
Point out the fuzziness and uncertainty of user preferences. Put forward the advantage of using cloud model to calculate the user preferences. Introduce the cloud model and construct the model of user preferences based on cloud model. Design one new algorithm for calculating the user preferences with time weight. The experiments show the personalized recommend based on the new user preferences has...
Point out that the document is too similarity in the return document sets in current information retrieval system. Put forward the new definition of mutual independence in the documents. Then, construct the mutual independence in the documents. Design one new algorithm for information retrieval. The method effectively overcomes the shortcomings of the original query system. The experiment express...
Analyzing the present situation of personalized recommendation system. Point out the limitation of similarity based on voting, and the disadvantage of the strict matching in calculating similarity. Put forward a new personalized recommendation method based on the statistics of item. Adopt the cloud model to calculate the similarity instead of traditional strict matching of cosine method. The experiments...
In order to quickly and accurately using mass information in the deep Web database. According to the characteristics of the deep Web: large-scale, dynamic and heterogeneity, One new query method was put forward based on the document divergence for the first time. The experiment adopted testing data of TREC show the method can avoid the repeat of query document in effect, especially for a great deal...
Put forward a new information retrieval method based on the query specificity after analyzing the existing problems of information retrieval system. The experiments show that the system has better query performance. Avoid the similarity documents in the first few pages effectively, when the system return a larger set of query documents.
Prediction query performance (PQP) has been recognized by the IR (Information Retrieval) community as an important capability for IR systems. This paper put forward pseudo prediction query performance in the base of analyzing PQP. The authors design a new IR method. The experiment adopted testing data of TREC Web Track shows the method can improve the effectiveness of query.
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