Study on the user behavior of digital library with Cosine Similarity Algorithm

This paper constructs an architectural model of database gateway, which can monitor and record the data flow between users and databases of digital library. Then it introduces cosine Similarity Algorithm, and proposes COS
_DCSU
, (DCSU, databases choice stickiness of user) to present the similarity of choice tendency in user pairs. Furthermore, it discusses the Interval Probability distribution of COS
_DCSU
values (IPDCV), and explores the application of IPDCV distribution characteristic while librarians making decisions.