关键词: HPLC, HPLC, 北沙参, 补骨脂素, 欧前胡素, 异欧前胡素

Abstract:

The key to solving the contradictions between land supply and land demand lies in the improvement of efficiency of land use．To make right and scientific economic development strategies，the coordination between urban economic development and efficiency of land use is to be measured．By using comprehensive evaluation index system and factor analysis method, this paper makes comprehensive evaluation on Urban Economy and Land Use Efficiency in18 Cities OF Sichuan Province, This study works out a model of coupling degree between economic development index and efficiency of land use in different cities in order to get the coordination degree between urban economic development and efficiency of land use．The model reflects the urban development levels and coordination degree between urban economic development and efficiency of land use，giving a concise and systematic presentation of the system．Quantitative evaluation and comparison studies can be carried out by applying the model to investigate the coordination degree of land use and economy in a region or different regions in different periods．The data collected from statistical yearbooks of Chinese cities was calculated through the model to get the coordination degree during period of 1998 to 2008．Results show that the main problem facing Sichuan Province’s 18 cities coordination degree between urban steadily. The study also shows that the economy and efficiency of land use has been improving still is an urgent issue to be solved．The study suggests that the government should play a leading role in this regard and equal efforts should be made in developing economy and improving efficiency of land use so as to improve the coordination between the two to achieve sustainable development．