中国省域数字经济发展空间分化格局研究

本文基于对数字经济内涵及发展新态势的认知,从数字化基础设施、数字化应用、数字化产业变革三个维度重构省域数字经济发展测评体系,综合考量分散在不同层面的发展状况,运用熵值法综合测算2017年中国省域数字经济发展,并采用自然间断点分级法,客观地揭示省域间数字经济发展空间分化格局及制约均衡发展的主要因素。研究发现,省域数字经济综合发展呈现由东向西梯级递减之势,区域分化显著,引致分化的主要因素是省域间在数字化产业变革和数字化基础设施上存在较大的空间差距。由三个维度分析得出,落后地区的网络基础和数据基础设施相对薄弱,企业和政府数字化转型缓慢,电子商务、数字产业化和产业数字化融合发展滞后,数字化应用主要局限于生活消费领域;而发达地区已进入数字化深度融合的高级发展阶段。

基于熵值法的省域数字经济发展空间分化格局

在数字经济发展背景下,运用熵值法综合测算各省域数字技术发展水平和数字技术融合水平,并利用ArcGIS软件绘制数据地图揭示其空间特征.研究发现,两种水平均存在分级现象.在空间分化方面前者呈现出大部分省域水平低,中部少数省域水平中等,沿海省域水平高的特点;后者呈现出由东向西、由中向南北递减,沿海省域水平高的特点,区域差异显著.数字技术发展水平落后于数字技术融合水平表现为普遍现象.

中国跨境电商产业发展空间分化格局的研究

基于波特钻石模型及我国31个省市自治区2017年相关数据,构建出一套我国省域跨境电商产业竞争力的水平评价体系。利用熵值法计算各省综合得分,采用变异系数研究跨境电商产业竞争力水平的各个方面在省际间发展是否均衡;采用K-Means聚类对各省进行聚类,并绘制可视化地图研究我国省域跨境电商产业竞争力水平的空间分化特征。研究结果表明,中国省域跨境电商产业竞争力水平在产业竞争与合作、市场需求、相关和支持性产业上发展不均衡;其空间分化特征为由东向西递减,由中向南北递减,沿海地区水平高。最后提出相关的对策建议。

长三角地区智慧城市建设评价及对经济发展影响分析

通过对国内外文献的梳理,构建长三角城市群智慧城市建设评价指标体系,使用熵权TOPSIS法计算出26座城市的五大维度评分和综合评价结果;使用ArcGIS软件绘制长三角城市群智慧水平和经济发展水平的空间分布图,研究智慧水平和经济水平的空间分化格局,探究两者在空间上的关联;最后使用灰色关联分析研究智慧城市建设对经济发展的作用机理。结果表明:长三角城市群智慧城市建设的关键性要素是城市治理和智能设施;智慧城市建设和经济发展在空间上关系密切,都呈现出以上海为核心、以若干城市为中心的网络化空间格局;智慧城市建设影响经济发展的主要因素是智能设施和改革创新。

Suburbanization and Subcentering of Population in Beijing Metropolitan Area:A Nonparametric Analysis

This study focuses on the suburbanization and subcentering of population and examines the nature of spatial restructuring in terms of the population distribution in the Beijing metropolitan area.Instead of the classic density function approach,we employ the nonparametric analysis to characterize the spatial pattern of population densities in the Beijing metropolitan area and identify the suburban subcenters.Our findings suggest that the population has spread with rapid urban growth in the Beijing metropolitan area,and the compact urban form has been replaced by a more dispersed polycentric spatial distribution.However,compared with the decentralization of western cities,the spatial extent of the decentralization of population in the Beijing metropolitan area is quite limited.The rapid growth of population in the near suburbs has expedited the sprawl of the central city,with a larger central agglomeration of population dominating the metropolitan area.In this sense,the spatial pattern of the Beijing metropolitan area is still characterized by the continuous compactness.However,our findings do provide the evidence that the city has been turning to a polycentric structure.We find significant population subcenters have emerged in the suburbs of Beijing since the 1980s.But the polycentricity emerged in the Beijing metropolitan area is very different by nature from that observed in Western cities.The subcenters emerged are adherent to the development scheme planned for the city,so it can be referred to as the so called 'planned polycentricity'.

Distribution Orientation and Driving Mechanism of Geographical Pattern Change of China′s Banking Industry

By analyzing the relationship among government, market driving forces, distribution orientation of banking industry, service opportunity equality and spatial patterns, this paper proposes that it is distribution orientation that lead to the formation and evolution of spatial pattern of banking industry. The difference of the distribution orientation leads to the separation of the spatial pattern of banking industry, and the change of the distribution orientation leads to the change of spatial pattern. The degree of spatial pattern change is subject to the degree of change of distribution orientation, and the scale of bank resources in the regions, which supports the distribution orientation variation. Based on these theoretical frameworks, some indicators were designed to analyze the pattern change of China′s banking industry and its effects since 1995 under the change of the distribution orientation. This paper finds that the orientation of economic benefit maximization driven by market causes the banking industry to concentrate in economically developed regions.The government, which does not follow the orientation of economic benefit maximization, plays a role of stabilizer. Since the bank branches in the regions with the greatest change in bank branch distribution are too few, and regions with the greatest change in bank loan allocation are the regions with lots of loans, the pattern change of the banking industry in physical form is not as notable as that in economic form.

A Method for Improving Simulation of PNA Teleconnection Interannual Variation in a Climate Model

The climate modeling community has been challenged to develop a method for improving the simulation of the Pacific-North America （PNA） teleconnection pattern in climate models. The accuracy of PNA teleconnection simulation is significantly improved by considering mesoscale convection contributions to sea surface fluxes. The variation in the PNA over the past 22 years was simulated by the Grid Atmospheric Model of lAP LASG version 1.0 （GAMIL1.0）, which was guided by observational SST from January 1979 to December 2000. Results show that heating in the tropical central-eastern Pacific is simulated more realistically, and sea surface latent heat flux and precipitation anomalies are more similar to the reanalysis data when mesoscale enhancement is considered during the parameterization scheme of sea surface turbulent fluxes in GAMIL1.0. Realistic heating in the tropical central-eastern Pacific in turn significantly improves the simulation of interannual variation and spatial patterns of PNA.

Quality Control and Analysis of Global Gauge-Based Daily Precipitation Dataset from 1980 to 2009

A series of quality control(QC) procedures were performed on a gauge-based global daily precipitation dataset from the Global Telecommunication System(GTS) for the period 1980-2009.A new global daily precipitation(NGDP) dataset was constructed by applying those QC procedures to eliminate erroneous records.The NGDP dataset was evaluated using the NOAA Climate Prediction Center Merged Analysis of Precipitation(CMAP) and the Global Precipitation Climatology Project(GPCP) precipitation datasets.The results showed that the frequency distribution and spatial distribution pattern of NGDP had a nice match with those from the CMAP and GPCP datasets.The global mean correlation coefficients with the CMAP and GPCP data increased from 0.24 for original GTS precipitation data to about 0.70 for NGDP data.Correspondingly,the root mean square errors(RMSE) decreased from 12 mm per day to 1 mm per day.The interannual variabilities of NGDP monthly precipitation are consistent with the CMAP and GPCP datasets in Asia.Meanwhile,the seasonal variabilities for most land areas on the Earth of NGDP dataset are also consistent with the CMAP and GPCP precipitation products.

Research on Newly Urbanized Towns and Districts in China

Since the last decade the central government endeavors to promote large scale of urbanization in China.Lots of new urban towns and districts are taking shape. Outline of the 12th Five-year Plan released by the central government points out that the new towns and districts are to be regulated. But few researches are considering the new towns and districts especially in the spatial distributive pattern and status in China. Given this situation this paper, after sorting out the world-wide research and development of new urban towns and districts, gives definitions of broad and narrow meanings. Based on the broad meaning definition, the database of new towns and districts in China is established. This paper then conducts a preliminary analysis of the new towns and districts.Then the two-step work plan and the advices are also proposed to further improve the research and practice of its kind in China.