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Energy problem is universally concerned all over the world. Over the years, as China paid more attention on energy problem seriously, China's energy consumption per unit GDP has decreased continually, but there is still a big gap between China and the developed countries, especially in the last five years, energy consumption per unit GDP fell slowly. To further improve the efficiency of energy use, the paper selects a number of factors, such as industrial structure deviation co-efficiency and energy conversion and processing rate, which are relevant to energy consumption per unit GDP of China. Through three grey incidence calculations (Deng's grey incidence, absolute degree of grey incidence and modified absolute degree of grey incidence) between energy consumption per unit GDP and each factor, we identified the most relative factors, and we further turn for the methods of improving energy use efficiency in China by researching these factors. Three calculation methods supply the same conclusion, which is energy prices is not a particularly significant impact on energy efficiency improvement.

Aim at the choice problem of the company advertisement medium in reality , a type of new uncertain comparison matrix-three-point interval number comparison matrix is put forward this text and its consistency, weight estimation approach are studied. Based on the complete consistency definition of three-point interval number matrix, definitions of possible value error and low - upper error are introduced. Following these definitions, the weight estimation model is developed based on the minimal sum error. Finally according to the actual circumstance of company, this text carry on a solid example analysis towards advertising medium of choose.