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Abstract Technology Import is an important way of hitech industry technology innovation.Through using ecological system theory and LotkaVolterra Model, this paper constructs the model of the Purchase of Domestic Technology (DT) and Acquisition of Foreign Technology (FT) to hitech industries. Based on the statistical data of China' s hitech industries' statistical yearbook (from 1995 to 2014), this paper makes empirical research to analyze the ecological relationship and the evolution property of DT and FT and evaluates the fitting and forecasting performance of the model through using index of the mean absolute percentage error (MAPE).The study shows that there is not equilibrium point between DT and FT, that FT can restrain DT, that DT can promote FT, that FT can substitute DT in the end.The results of this study provide some practical enlightenment for technology import in improving technology import of hi tech industries.
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