The objectives of this paper are twofold. First, we aim to clarify the mechanism by which use of farm machinery in Chinese agriculture has grown rapidly over the past decades, using a separate Cobb–Douglas (SCD) production function. Second, we determine under what condition will China's grain...

Online users’ collective interests play an important role for analyzing the online social networks and personalized recommendations. In this paper, we introduce the information entropy to measure the diversity of the user interests. We empirically analyze the information entropy of the objects...

Online rating can directly reflect users’ collective behavioral patterns which is of great concern in online social systems. In this paper, we investigate the correlations between the users’ rating behaviors and the real-time updated average ratings of objects given from other users’...