%A ZHANG Ling, REN Xue-fang %T Intelligent data classification and intelligent retrieval-recognition of class %0 Journal Article %D 2020 %J JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) %R 10.6040/j.issn.1671-9352.0.2020.178 %P 7-14 %V 55 %N 10 %U {http://lxbwk.njournal.sdu.edu.cn/CN/abstract/article_3340.shtml} %8 2020-10-20 %X Based on the P-set models with dynamic characteristics, and for the research of ∧ type big data, several new concepts such as αF-data equivalence class, α(-overF)-data equivalence class and F(-overF))-data equivalence class are defined, the data boundary characteristics and measurement are analyzed, and data reasoning and its structure are proposed. The main points of this paper are to define the measurement of data boundary contraction and expansion for data element redundancy and missing, analysis data reasoning to obtain the generation theorems of data equivalence class, design data intelligent retrieval algorithm and data intelligent retrieval and recognition criteria, and finally give the application.