Information retrieval method and system based on spurious correlation feedback model
A pseudo-correlation feedback and information retrieval technology, applied in the field of information retrieval, can solve the problems of low average retrieval accuracy, difficulty, information flooding, etc.
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[0054] The core problem to be solved by the present invention is to propose a kernel function to reflect the distribution of user query words and document candidate words and the degree of correlation between the two, and to use this degree of correlation as an additional weight in the pseudo In the relevant feedback model, query expansion is implemented to improve the accuracy of retrieval.
[0055] The following describes in detail the information retrieval method of the present invention, which integrates the word correlation degree of the kernel function into the pseudo-correlation feedback model, in conjunction with the accompanying drawings and embodiments.
[0056] Aiming at the unreasonable assumption of vocabulary independence in the classical method, the present invention proposes to take the correlation between words into consideration. Through the effective use of some statistical information of the data in the document collection (such as context information and o...
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