7Lu S R,Wang Y W. Convergence, technological interde-pendence and spatial externalities : a spatial dynamicpanel data analysis [ J ]. Applied Economics, 2015, 47(18): 1 833 -1 846.
8Makridis C. Converging technologies; a critical analysis ofcognitive enhancement for public policy application [ J ].Science and Engineering Ethics,2013 ,19 (3 ) : 1 017 -1 038.
9Barite MG. The notion of “category” : Its implications insubject analysis and in the construction and evaluation ofindexing languages [ J ]. Knowledge Organization,2000,27(1 -2) : 4-10.
10Yamada K. Subject librarians of college and university li-braries in the united states of america[ J ]. Library and In-formation Science,2014(71) : 27 - 49.
