5John Naisbitt. Megatrends. Ten New Directions Trans- forming Our Lives[M].New York:Warner Books, 1982: 16-17.
6Kenneth C. Laudon, Jane P. Laudon. Management In- formation Systems-Organization and Technology[M]. New York:Prentice Hall, 2000:122.
7Manuel Castella.The Informational City: Information Technology, Economic Restructuring and the Ur- ban-Regional Process[M]. Oxford:Basil Blackwell, 1989:41.
8Joanne Fox-Przeworski. Concentration of New Information Technologies: Are There Spatial Policy Concerns in: Cities of the 21st Century: New Technologiesand Spatial Systems [M].USA:Peter Hall and Peter Newton, 1991 : 149-157.
9A1 Gore. The Digital Earth: Understanding Our Planet in the 21st Century[R]. At the California Science Center Los Ange- les California,1998.
10William J. Mitchell. City of Bits:Space,Place and the Info-bahn[M].MA:MIT Press, 1996:151.