基于关系视角的中国对外直接投资研究进展与展望   总被引：2，自引：0，他引：2  

周政可  梁育填  周克杨 《热带地理》2019,39(6):942-953

基于关系视角梳理了国内外对外直接投资的研究进展,认为已有的传统理论在解释中国企业对外投资方面虽仍起作用,但难以解释中国跨国企业缺乏所有权优势、快速的国际化步伐和依赖社会关系网络等显著特征,因此必须用中国特有的变量加以补充解释;一方面,文章重点综述了基于合同和契约建立的正式关系网络,强调政治关系和经济关系对中国企业对外直接投资的影响;另一方面,深入探讨基于情感和血缘建立的非正式关系网络对企业跨国投资的影响,认为华人华侨网络是影响中国对外直接投资具有中国特色的关键变量,能帮助企业有效地了解当地制度与文化,实现地方嵌入。最后,提出针对中国特点的中国企业对外直接投资的研究方向：1）建构基于中国特色的企业对外直接投资理论框架;2）基于关系视角的中国企业对外直接投资需要进一步探讨;3）基于族裔网络关系视角的对外直接投资研究有待探索。  相似文献   

纬度因素对季节性时序TEC短期预报模型的影响分析     

陈雨田  刘立龙  刘中流  贺朝双 《大地测量与地球动力学》2018,38(6):581-586

通过测试选取合适的时间序列长度,分析地磁指数,排除磁暴与地磁活动的影响,针对电离层TEC值的周期性变化及其随纬度的不均匀分布规律,采用季节性时间序列模型SARIMA和指数平滑模型Holt-Winters,利用IGS中心提供的TEC格网数据,对北半球不同纬度的48个区域进行预报,并通过定义日均相对精度和均方根误差来评定预报精度。结果表明,3种模型均能较好地反映电离层TEC值的周期性变化,但均方根误差随纬度的降低总体呈现增长趋势,且在北纬25°与55°表现为极大值,在北纬45°表现为极小值。  相似文献   

Policy transfer and scale reconstruction of China’s overseas industrial parks: A case study of the Malaysia-China Kuantan Industrial Park     

LIANG Yutian  ZENG Jiaqi  KUIK Cheng-Chwee  ZHOU Zhengke  ZHOU Keyang 《地理学报(英文版)》2021,31(5):733-746

As an innovative mode of China's foreign direct investment,China's overseas in-dustrial parks are not only the main content of the Belt and Road Initiative(BRI)but also the practical carrier of policy transfer.However,most of the academic literature on the policy transfer of overseas industrial parks has regarded the host country as a passive learner and seldom considers the two-way interactions between the host country and the home country.Using the Malaysia-China Kuantan Industrial Park(MCKIP)and the"Two Countries,Twin Parks"model as case studies,we discuss the applicability and innovative development of the policy transfer theory of China's overseas industrial parks under the background of BRI.This article systematically analyzes the developmental background of the MCKIP and the coop-erative framework between the governments.We consider the problems encountered in the policy transfer process and the solutions,as well as the two-way interactions between China and Malaysia in terms of the flow of people,logistics,capital,information,and technology.The study sheds light on the construction of the"Two Countries,Twin Parks"overseas in-dustrial park.  相似文献   

机载LiDAR点云自适应滤波算法     

吉雨田  张春亢  尹耀 《测绘科学技术学报》2021,38(2):142-147

针对传统移动曲面拟合滤波算法难以使用单一且具有自适应性阈值滤波的问题,提出一种改进自适应阈值滤波算法.首先将点云格网化,利用混合最小二乘曲面拟合对多级移动曲面滤波算法进行部分优化;其次利用离散点云数据分布特征计算一级滤波阈值;最后计算格网中最大真实高程值与最小真实高程值之差,利用曲率极限点为该值设定一个自适应系数,对滤...  相似文献   

Spatial distribution of Ice Shelf Water in front of the Amery Ice Shelf,Antarctica in summer     

郑少军  史久新  矫玉田  葛人峰 《中国海洋湖沼学报》2011,29(6):1325-1338

As a unique low-temperature water mass in Antarctic coastal region, the Ice Shelf Water (ISW) is an important component for the formation of the Antarctic Bottom Water (AABW). In this paper, we present a criterion for ISW identification based on freezing point at the sea surface, and we study spatial distribution of ISW in front of the Amery Ice Shelf (AIS) and its flow path in Prydz Bay by analyzing hydrographic data from Australian cruises in 2001 and 2002, as well as Chinese cruises in 2003, 2005, 2006, and 2008, all being made in the austral summer. The relatively cold and fresh ISW occurred as several discrete water blocks with cold cores in front of the AIS, within the depth range of 100?600 m, under the seasonal thermocline. ISW had obvious temporal and spatial variations and the spatial distribution pattern changed greatly after 2005. Most of ISW was concentrated west of 73°E during 2001 to 2003 and 2006, but it was widespread to east in 2005 and 2008. In all observation years, a small amount of cold ISW always occurs at the west end of the AIS front section, where the coldest ISW in the whole section also occurred in 2001, 2003 and 2006. Considering general cyclonic circulation pattern under the AIS, the ISW flowing out from west end of the AIS front might have experienced the longest cooling period under ice shelf, so it would have the lowest temperature. Analysis of data from meridian sections in Prydz Bay in 2003 implied that ISW in the west could spread north to the continental break along the east flank of the Fram Bank near 70.5°E, mix with the upwelling Circumpolar Deep Water and possibly contribute to the formation of AABW.  相似文献   

南极威德尔-斯科舍汇流区上层湍流混合特征及其与水团和环流的联系     

林丽金  史久新  姚辰阳  郭桂军  程灵巧  矫玉田  施骞 《极地研究》2022,34(1):34-50

利用中国第32次南极科学考察队于2015年12月至2016年1月在南极威德尔-斯科舍汇流区获得的湍流微结构、温盐深仪和下放式声学多普勒海流计观测资料,分析了该海域上层海洋(30～500 dbar)的湍流混合空间分布特征.结果显示,湍动能耗散率(ε)和湍扩散系数(Kρ)分布呈现明显的区域性特征,与当地的水团和环流分布密切...  相似文献   

红外遥感器自身引起的背景辐射研究     

陈永和  陈洪达  傅雨田 《遥感学报》2014,18(Z1):25-29

针对折反射光学型式的红外遥感器,结合各组件辐射的传输特性,建立系统自身辐射的计算模型,分析了遥感器自身热辐射所形成的背景辐射.通过将背景辐射与目标辐射相比较,分析其对红外探测的影响,并讨论了背景辐射影响的消除方法.最后,利用该模型分析了天宫一号高光谱成像仪红外观测谱段的背景辐射,并讨论了光瞳像差的影响.  相似文献   

Surface heat budget and solar radiation allocation at a melt pond during summer in the central Arctic Ocean   总被引：3，自引：0，他引：3  

ZHANG Shugang  ZHAO Jinping  SHI Jiuxin  and JIAO Yutian 《中国海洋大学学报(英文版)》2014,13(1):45-50

The heat budget of a melt pond surface and the solar radiation allocation at the melt pond are studied using the 2010 Chinese National Arctic Research Expedition data collected in the central Arctic. Temperature at a melt pond surface is proportional to the air temperature above it. However, the linear relationship between the two varies, depending on whether the air temperature is higher or lower than 0℃. The melt pond surface temperature is strongly influenced by the air temperature when the latter is lower than 0℃. Both net longwave radiation and turbulent heat flux can cause energy loss in a melt pond, but the loss by the latter is larger than that by the former. The turbulent heat flux is more than twice the net longwave radiation when the air temperature is lower than 0℃. More than 50% of the radiation energy entering the pond surface is absorbed by pond water. Very thin ice sheet on the pond surface(black ice) appears when the air temperature is lower than 0℃; on the other hand, only a small percentage(5.5%) of net longwave in the solar radiation is absorbed by such a thin ice sheet.  相似文献   

埃默里冰架前缘水的特性和海流结构   总被引：3，自引：0，他引：3       下载免费PDF全文

陈红霞  潘增弟  矫玉田  刘娜  项宝强 《极地研究》2005,17(2):139-148

本文利用中国第19次南极科学考察普里兹湾内埃默里冰架前缘水域观测的LADCP、 CTD资料,研究并分析了普里兹湾内埃默里冰架前缘水域水的温、盐特性和海流结构。资料显示,在冰架前缘的水域中存在着四种典型的夏季水团;流速分布显示出东进西出的特征。此外在普里兹湾内的上层和中层海洋中还存在着逆时针和顺时针方向的涡旋:逆时针涡旋西侧是普里兹湾向冰架入流的位置所在;入流的源地是普里兹湾东侧的沿岸西向流。这些特征涉及到夏季普里兹湾内的环流形式、冰架底部的消融速率和冰架水的生成规模以及冰架区域与冰架外普里兹湾内的水交换形式。  相似文献   

白令海和楚科奇海总好气异养细菌丰度和对温度的适应性          下载免费PDF全文

陈皓文  高爱国  孙海青  矫玉田 《极地研究》2003,15(3):171-176

用平皿培养计数法测定了白令海和楚科奇海测区水和沉积物中的总好气异养细菌(GAB)的丰度 ,并进行了比较。分析了不同海区、测点、不同层次沉积物中GAB丰度及在不同温度中的适应性。结果表明 ,水中GAB检出率大于沉积物 ,但丰度仅为后者的 0 .0 7% ;表层沉积物中GAB检出率高于其它层次 ;白令海GAB检出率、丰度及变幅均高于楚科奇海。所有站点沉积物中GAB含量平均约为 31 66.3× 1 0 2 CFU·g- 1 (湿 ) ;沉积物GAB丰度大致显出低纬度区大于高纬度区之势。温度试验结果表明所试GAB中多数为适冷菌 ,少数可能为中温菌 ,显示出北极海洋细菌对温度有较强的适应性  相似文献