Rank Pattern Research Of University Library Weeding Under The Digital Environment

Library weeding is foundation work of the library, and its implementation will affect the satisfaction of the reader to find infonnation and take charge of the space of library collections. The understanding to library weeding still remain in the previous knowledge, it's refers to withdraw some books from the basic collection, packaged in bundles in a corner of the library or given away, sold, etc., and its essence is that making the books will be completely removed from the collections. As the environment changes, the essence of weeding books have also changed, in the modern library the open-shelf has become main form, different from the previous closed stack collection, where the mean of weeding library Unlike the previous conception.it divided weeding library into two parts, one is transaction, the other is removed. Removing part of the contents of weeding library the sames to the previous definition, while the transaction is an important part of the Modern Librarytick about weeding, it may make use of the old books once again.This paper through by comparison, interviews and other research methods to identify the main factors in weeding process,and according to their level of importance come to the rank pattern of university library weeding, and throgh the mode program the automaticrank pattern of university library weeding automation system. and then given the suggestion to library about weeding base On the empirical research.The Paper focuses on three areas:analysis of the main factors about library weeding; building the rank pattern model; and verify the scientific of model.