on the issue of East Asian Main Economies' Foreign Exchange Reserve

东亚各经济体基本上都走外向型经济的发展道路，经济的高度外向化一方面促进了国民经济的高速增长，同时也导致了各经济体在外部冲击面前的异常脆弱。保持一定的外汇储备以维持正常的对外经济交往、防范和化解潜在的金融风险就显得非常重要。东亚也历来是全球外汇储备的聚积区，但在金融危机前区内大多数发展中经济体都不同程度地存在着外汇储备的相对短缺，这也是东亚许多国家未能幸免于金融危机的重要原因。金融危机以后，这种状况发生了根本的变化，这时外汇储备的快速增长在东亚地区成为了一个普遍的现象，由此引起了国内外对东亚经济发展、外汇储备以及外汇政策的极大关注。这些问题随着美元2002年以来的持续贬值而变得更加敏感，一时间东...Abstract East Asia generally walks path of the export-oriented economical development, which on the one hand promoted the national economy at high speed, caused most economies to be frail on the other hand. As a result, to some extent it becomes necessary to hold the certain foreign exchange reserve in order to maintain the normal foreign trade, guard against or melt the financial risks. Eas...学位：经济学硕士院系专业：南洋研究院_世界经济学号：20031900

The Status Quo and Prospect in the Cooperation of Energy Between China and ASEAN

With the ongoing growth of China's economy in recent years,China's import of oil has increased year by year.Oil security has become a hot issue that people around the world are concerned about.Therefore,it is necessary for China to adopt a policy of importing oil from multi-sources and intensifying the international cooperation to guarantee the supply of oil.Meanwhile,the economic and trade relations between China and ASEAN has developed into some newstages and the cooperation in energy resources has become an important part of their comprehensive relations of cooperation.In such background,the paper tries to reviewthe status quo of such cooperation in petroleumgas and to analyze the reasons for their fast growth and the prospect for such cooperation

沙漠腹地人工绿地地表能量交换特征/Characteristics of surface energy exchange in the artificial shelter forest land of the hinterland of Taklimakan Desert[J]

运用涡度相关法开路系统对塔克拉玛干沙漠腹地人工灌溉绿地生长季地表能量交换特征以及与环境因子的关系进行测定分析.结果表明:在典型晴天条件下,无论是沙漠区还是沙漠腹地灌溉绿地,白天感热通量在净辐射通量的分配中所占的份额最大,潜热交换仅占很小的比例,人工绿地感热通量和潜热通量的峰值为230.54 W/m2和88.5 W/m2,沙漠区为220 W/m2和17.55 W/m2,沙漠腹地人工灌溉造林后潜热交换明显增加.沙漠腹地造林后,绿地波文比日变幅和日均波文比均减小,绿地日均波文比为沙漠区的15％,人工绿地的营建促使了局地气候的改变.绿地地表能量交换受气象因子和下垫面条件的影响和制约,按相关系数的高低,环境因子对感热、潜热通量的影响依次为:Rn＞△Ta＞△Ts＞v＞ Ts,沙漠区人工造林后地表能量交换与多个环境因子有着密切的关系.这些研究结果将加深我们对沙漠地区人工灌溉造林地近地层能量交换的认识