探地雷达数值模拟在水利工程病害检测中的应用

探地雷达检测法方法具有简便、效率高和应用范围广的特点。在水利工程病害检测中,以往雷达图像的解释通常需要大量的试验和野外工作经验来相互验证,但这种方法受各种各样条件的制约,使得检测的工作效率下降。而利用数值模拟方法,对工程病害进行数值模拟计算,参照模拟的结果进行对比解释,将有助于病害的判断,提高解释的准确性。本文通过对典型水利工程病害的探地雷达数值模拟,为有效识别探地雷达图像提供了可参考和借鉴的实践经验。     

Housing Boom,Dutch Disease,and the Decline in China's Manufacturing Exports

Drawing on Dutch disease theory, we assess how the recent housing boom has contributed to a decline in China's manufacturing exports. Using Chinese city and enterprise panel data from 2004 to 2013, our analysis reveals that Dutch disease indeed exists and that the housing price increase has played a very important role in affecting China's manufacturing exports through two key channels: resource movement effect and spending effect. Specifically, this paper found that: (i) the housing price increase hindered labor flowing into China's manufacturing industry (resource movement effect) and caused higher inflation (spending effect); (ii) the housing boom clearly impeded China's manufacturing exports, especially after the outbreak of the global economic crisis in 2008; (iii) the impacts of the housing price increase on China's manufacturing exports were heterogenous, and were more significant for labor-intensive manufacturing businesses, businesses that were foreign owned, less R&D intensive, or located in the central and western regions.