人力资本对FDI技术溢出效应影响的实证研究

已有研究认为,跨国公司技术转移力度的大小、FDI技术溢出渠道的通畅程度和东道国自身“吸收能力”是影响FDI技术溢出效应的三个重要影响因素,而东道国人力资本水平又对这三个因素有决定性的作用。通过构建理论模型,并以中国1983-2003年时间序列数据为样本,得出结论认为:人力资本水平的丰裕程度决定了FDI技术溢出的大小;FDI能够通过资本积累效应和技术溢出效应促进中国的经济增长,而且FDI与人力资本相结合的技术溢出效应要远远大于资本积累效应。     

国际R&D的技术溢出效应——基于非参数DEA方法和中国数据的经验研究

利用DEA方法对中国全要素生产率(TFP)进行了测算,并建立国际知识溢出分析框架,检验了基于进口贸易和FDI渠道的国际R&D资本对中国TFP的溢出效应.结果显示:国内以及基于进口贸易和FDI渠道的国际R&D对TFP增长起到显著的促进作用;通过对TFP进行分解,发现国内和国际R&D资本对技术进步促进作用明显,对技术效率影响微弱;人力资本对TFP促进作用不显著.     

服务业FDI、技术溢出与地区吸收能力 ——基于非线性面板平滑转换模型

利用2004—2014年我国服务业省际面板数据,以经济发展水平、对外开放程度、研发投入强度和法律保护作为地区吸收能力的衡量指标,采用面板平滑转换(PSTR)模型,研究中国服务业FDI技术溢出的非线性效应。结果表明,以上4个指标衡量的吸收能力对服务业FDI技术溢出皆存在门槛效应。当转换变量所代表的吸收能力跨过门槛值之后,服务业FDI具有较为显著的技术溢出效应,不同地区的服务业FDI技术溢出存在明显的非均衡性。     

产业集聚对江苏FDI技术外溢的影响研究

江苏是我国经济增长最快的地区之一,以其优越的地理位置和丰富的资源优势吸引大量外资流入.然而庞大的外商直接投资对经济发展究竟有何种影响却不明确,产业集聚作为影响外资流入的重要因素,对FDI技术外溢的影响也不得而知.为了能更好地促进江苏经济发展,文章运用江苏省2003-2010年间规模以上制造业30个行业的面板数据,利用DEAP2.1和Eviews6.0软件分析了FDI、产业集聚和技术进步之间的关系.结果显示:江苏省引进的外商直接投资存在正的技术溢出效应,但是相关行业的产业集聚抑制了FDI的技术溢出.     

双向FDI溢出对中国区域技术创新的影响 ——兼论吸收能力的调节效应和门槛效应

运用2003—2018年中国省级面板数据，创新构建了吸收能力的量化方法，优化了知识生产模型的分析框架，使用空间误差模型对双向FDI溢出对区域技术创新的影响进行研究，并检验了吸收能力在其中的调节效应和门槛效应。研究发现：双向FDI溢出均促进了我国区域创新水平的提升，但该作用存在区域异质性；OFDI吸收能力起到正向调节效应，吸收能力能够增强OFDI溢出对技术创新的正向影响；FDI吸收能力存在门槛效应，当吸收能力超过门槛值时,FDI溢出对技术创新的影响将降低。     

吸收能力、FDI溢出与科技进步 ——以山东省17地市为例的门槛效应研究

运用山东省17地市2000—2008年面板数据,从吸收能力角度入手,构建门槛模型实证分析外商直接投资(FD I)技术溢出对科技进步的促进作用。揭示研发投入强度、人力资本和基础设施等变量存在单门槛效应,技术差距存在双门槛效应,再用两阶段最小二乘(2SLS)回归说明了这些变量的门槛区间决定着FD I溢出促进各地区技术进步的效果差异。同时给出各市在吸收能力各方面的现状,最后提出政策建议。     

我国工业部门FDI技术溢出效应实证研究——基于苏州和宁波的比较

文章以Feder（1983）模型为基础构建计量模型,对苏州、宁波两地FDI在工业部门中的技术溢出效应进行计量分析和实证检验。分析结果表明,苏州的FDI对内资企业的技术进步产生了显著的促进作用,而宁波的FDI所产生的技术溢出效应非常微弱。     

中国FDI技术溢出研究综述

引进FDI的一个初衰就是利用FDI的技术溢出效应带来国内企业的技术进步和生产率的提高。从目前国内的研究看来,FDI的技术溢出效应的确带来了国内企业的技术进步,但是大部分研究发现FDI技术溢出对国内企业生产率提高的影响却是不显著或者是负面的。本文重点梳理了FDI技术溢出对国内企业技术进步与生产力提高的影响研究,并进行了总结和进一步研究的建议。     

加强闽台经贸联系促进福建省技术进步

吸引和利用国际技术的溢出效应是促进一个国家技术进步与经济增长的重要途径。国际贸易与FDI的技术溢出效应是指国际贸易与FDI对一国的技术进步带来的直接或间接的影响。以国际贸易、FDI为传递渠道的技术外溢通常称为物化型技术溢出,是国际技术溢出的主要方式。     

数字经济发展对产业结构升级的影响及其区域差异

通过对数字经济发展影响产业结构升级的路径加以理论分析，构建了数字经济和产业结构升级的衡量指标，并运用2015年～2020年全国省级面板数据进行空间计量检验.结果表明：(1)数字经济发展存在正的空间自相关性，邻近区域之间发展呈现出一定的集聚特征；(2)数字经济发展可以有效地促进本地区产业结构升级，同时对周边地区产生正的空间溢出效应，且这种促进作用呈现出区域异质性，东部地区作用效果最为显著，西部地区效果最差；(3)固定资产投资、城市化水平提高在促进本地区产业结构升级的同时对周边地区造成负的溢出效应；(4)政府干预过多不利于产业结构优化升级；(5)技术创新存在正的溢出效应，但由于目前国内创新能力较为薄弱，技术创新的推动作用不够明显.根据这些结论为更好发挥数字经济对产业结构升级的促进作用提出相关政策建议.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.