I. Introduction
With the rapid development of the mobile Internet, big data technology came into being [1– 2]. The rapid development of data mining, data fusion and other technologies benefited from the rapid development and popularization of the Internet [3– 4]. From the initial creation of the Internet in 1968, to 2005, the Internet has been popularized worldwide and penetrated into the subtleties of human production activities, becoming an indispensable tool [5– 6].