Abstract:

For China’s economic development and social harmony 〖JP2〗to achieve sustainability,energy consumption〖JP〗 plays an important role.But theoretically the relationship between those two is not clear and definite.In this paper,through matlab 70 software with EMD method,the authors analyzed the intrinsic relationship between annual growth rate of energy consumption and GDP growth rate from 1954 to 2007,which reflected the dynamic relationship between the economic growth and energy consumption growth and provided a new research method for a long time sequence to study the dynamic changes.Through the method of EMD,the fluctuations or trends in the different time level were unbundled to produce a series of different characteristics of the intrinsic mode functions and the system had the evolution curves on a different time scale,which could be as a special solution to the system.Based on the data analysis of nearly 54 years by the method of 〖JP2〗EMD for our country,results show that:(1) The growth of our energy consumption〖JP〗 consists of four 〖WTBX〗IMF〖WTBZ〗 weights and one trend item.The GDP growth consists of three 〖WTBX〗IMF〖WTBZ〗 weights and one trend item.(2) In the short cycle of highfrequency fluctuations,energy consumption and economic growth is highly consistent.(3) For the medium scale of cycle fluctuations,energy consumption performs a certain lag, the average lag is one to three years.(4) For the large scale cycle fluctuations,economic growth performs a certain lag,the average lag is three to 〖JP2〗five years, showing that the energy expresses a stipulation〖JP〗 to economy.

Key words: DP growth/energy consumption growth/ EMD