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서부대개발정책이 중국서부지역 총요소생산성에 미치는 영향에 관한 연구
이창호 ( Lee Changho ),경성림 ( Qing Chenglin ) 한국외국어대학교 중국연구소 2017 中國硏究 Vol.72 No.-
This research analyses the outcomes of the China Western Development policy, proceeding in China's Western region, and derives its future prospects. It especially looks at to what extent economic growth has been realized and how the economic growth gap between provinces within the Western region has changed as a result of the China Western Development policy, analyzes what the change factors are, and presents policy implications. This study focuses on outcomes which influence the Western region's economic growth, through Total Factor Productivity analysis and the Malmquist productivity index. Results show that the China Western Development policy can to some extent be assessed as showing outcomes. However, these outcomes appeared unevenly among provinces within the Western region. Provinces such as Chongqing, Inner Mongolia, Sichuan, Ningxia, and Qinghai experienced growth of total factor productivity through diverse technical development and attracting foreign investment, whereas Yunnan, Guizhou, Shanxi, and Guangxi were unable to properly realize change of technical efficiency, and their total factor productivity instead decreased. On the basis of these results, we present implications for the balanced development of the Western region as follows: enhancing the utilization of factors of production, preventing the loss of human talent, and using marketing to attract foreign capital, by reformulating rational policy directions and technology.
이창호(Changho Lee),박원식(Wonsik Park),이정근(Jungkeun Rhee) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
In general, customers prefer gasoline vehicle to diesel because of the noisy sound of diesel engine. So, many studies have been conducted to reduce the combustion noise of the diesel engine. According to the big progress of the combustion noise reduction technology, the mechanical noise form diesel engine is getting more noticeable. Therefore automakers should improve the mechanical noise as well as the combustion noise from diesel engine. The present study deals with the rattle noise from timing driving system of mid-size diesel engine, which is hard to separate from combustion noise. By using the angle domain analysis, the rattle noise source was defined as the scissors gear of the timing drive system. Although the scissors gear was used, unexpected rattle noise occurred from the gear during idle and low speed driving. From this study, we found that the pre-load of the scissors gear should be optimized to remove unintended rattle noise.