5Von Hipple E. "Sticky Information" and the Locus of Problem Solv- ing: Implications for Innovation[J].Management Science,1994,40(4). .
6Cohen, Wesley M, Levinthal D A .Absorptive Capability: A New Per- spective on Learning and Innovation[J].Administration Science Quar- terly,1998,35(1).
7Forrester J W.Principle of systemes[M].Cambridge Productivity Press, 1968.
8Lyneis J M .System Dynamic for Market Forecasting and Structural Analysis[J].System Dynamic Review,2000, (2).