4SCHUMPETER,JOSEPH A.The process of creative destruction.Part Ⅱ in Chapter Ⅶ In Capitalism,Socialism and Democracy[M].London:George Allen & Unwin.1979 /1976:81-86.
5UTTERBACK,JAMES M.Mastering the dynamics of innovation[M].Boston:Harvard Business School Press.1994.
4SCHUMPETER,JOSEPH A.The process of creative destruction.Part Ⅱ in Chapter Ⅶ In Capitalism,Socialism and Democracy[M].London:George Allen & Unwin.1979 /1976:81-86.
5UTTERBACK,JAMES M.Mastering the dynamics of innovation[M].Boston:Harvard Business School Press.1994.