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The Impact of Human Resource Management on Regional Economic Development
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作者 Ruicheng Zhou 《Proceedings of Business and Economic Studies》 2024年第3期35-41,共7页
A company that does a good job in human resource management will promote the process of regional economic development,and related enterprises will develop rapidly as a result.In future work,enterprises should carefull... A company that does a good job in human resource management will promote the process of regional economic development,and related enterprises will develop rapidly as a result.In future work,enterprises should carefully study the relationship between the two,and innovate their human resource management and development methods while fully considering the needs of talent development and regional economic development,in order to fundamentally optimize the regional economic development status. 展开更多
关键词 Human resource management Impact on regional economic development
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Regional Economic Development Trend Prediction Method Based on Digital Twins and Time Series Network
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作者 Runguo Xu Xuehan Yu Xiaoxue Zhao 《Computers, Materials & Continua》 SCIE EI 2023年第8期1781-1796,共16页
At present,the interpretation of regional economic development(RED)has changed from a simple evaluation of economic growth to a focus on economic growth and the optimization of economic structure,the improvement of ec... At present,the interpretation of regional economic development(RED)has changed from a simple evaluation of economic growth to a focus on economic growth and the optimization of economic structure,the improvement of economic relations,and the change of institutional innovation.This article uses the RED trend as the research object and constructs the RED index to conduct the theoretical analysis.Then this paper uses the attention mechanism based on digital twins and the time series network model to verify the actual data.Finally,the regional economy is predicted according to the theoretical model.The specific research work mainly includes the following aspects:1)This paper introduced the development status of research on time series networks and economic forecasting at home and abroad.2)This paper introduces the basic principles and structures of long and short-term memory(LSTM)and convolutional neural network(CNN),constructs an improved CNN-LSTM model combined with the attention mechanism,and then constructs a regional economic prediction index system.3)The best parameters of the model are selected through experiments,and the trained model is used for simulation experiment prediction.The results show that the CNN-LSTM model based on the attentionmechanism proposed in this paper has high accuracy in predicting regional economies. 展开更多
关键词 regional economic development attention mechanism digital twins time series network
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Application of Integration of Spatial Statistical Analysis with GIS to Regional Economic Analysis 被引量:12
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作者 CHENFei DUDaosheng 《Geo-Spatial Information Science》 2004年第4期262-267,共6页
This paper summarizes a few spatial statistical analysis methods for to measuring spatial autocorrelation and spatial association, discusses the criteria for the identification of spatial association by the use of glo... This paper summarizes a few spatial statistical analysis methods for to measuring spatial autocorrelation and spatial association, discusses the criteria for the identification of spatial association by the use of global Moran Coefficient, Local Moran and Local Geary. Furthermore, a user-friendly statistical module, combining spatial statistical analysis methods with GIS visual techniques, is developed in Arcview using Avenue. An example is also given to show the usefulness of this module in identifying and quantifying the underlying spatial association patterns between economic units. 展开更多
关键词 spatial statistical analysis spatial autocorrelation spatial association regional economic analys
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R/S AND WAVELET ANALYSIS ON EVOLUTIONARYPROCESS OF REGIONAL ECONOMIC DISPARITY IN CHINA DURING PAST 50 YEARS 被引量:9
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作者 XUJian-hua LUYan +1 位作者 SUFang-lin AINan-shan 《Chinese Geographical Science》 SCIE CSCD 2004年第3期193-201,共9页
This paper shows the dynamic process of regional disparity of economic development in China in the past 50 years from a new insight by using the rescaled range statistic (R/S) analysis and wavelet analysis of the Thei... This paper shows the dynamic process of regional disparity of economic development in China in the past 50 years from a new insight by using the rescaled range statistic (R/S) analysis and wavelet analysis of the Theil index sequence with different time scales. The main conclusions are: 1) The regional disparity of economic development in China, including the inter-provincial disparity, inter-regional disparity and intra-regional disparity, has existed for many years. Theil index by the comparative price has revealed the true trend for comparative disparity of regional economic development from 1952 to 2000. 2) Decomposition of Theil index indicates that the dynamic trend of comparative inter-provincial disparity in the coastal region is in line with dynamic trend of inter-provincial disparity in the whole China. 3) The R/S analysis results tell us that during 1966-1978, the Hurst exponent H=0.504 approximate to 0.5, which indicates that in that period the evolution of comparative inter-provincial disparity of economic development showed a random characteristic, and in the other periods, i.e. 1952-1965, 1979-1990 and 1991-2000, the Hurst exponent H>0.5, which indicates that in those periods the evolution of the comparative inter-provincial disparity of economic development in China had a long-enduring characteristic. 4) By using wavelet analysis at different time scale, we arrived at a conclusion that the evolutionary process of the disparity of economic development of China is not a simple inverted U shape but a compound of several U shapes. The result tells us that the evolutionary plot of inter-provincial disparity in China follows the inverted U on the whole at the higher scale, 24 ( 16 years). That is to say, the disparity tends to rise in the first stage of economic development, and fall slowly over the peak in the second stage of economic development. However, if we shorten the time scale to 23 ( 8 years), then a link of several U shapes will appear. 展开更多
关键词 China regional economic disparity Theil index R/S analysis wavelet analysis
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Spatial Autocorrelation Analysis on Regional Economic Disparity of Northeast Economic Region in China 被引量:6
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作者 Li Fei Zhou Chenghu 《Chinese Journal of Population,Resources and Environment》 2009年第2期27-31,共5页
Popular regional inequality indexes such as variation coefficient and Gini coefficient can only reveal overall inequality, and have limited ability in revealing spatial dependence or spatial agglomeration. Recently so... Popular regional inequality indexes such as variation coefficient and Gini coefficient can only reveal overall inequality, and have limited ability in revealing spatial dependence or spatial agglomeration. Recently some methods of exploratory spatial data analysis such as spatial autocorrelation have provided effective tools to analyze spatial agglomeration and cluster, which can reveal the pattern of regional inequality. This article attempts to use spatial autocorrelation at county level to get refined spatial pattern of regional disparity in Chinese northeast economic region over 2000-2006 (2001 absent). The result indicates that the basic trend of regional economy is an increasing concentration of growth among counties in northeast economic region, and there are two geographical clusters of poorer counties including the counties in western Liaoning Province and adjacent counties in Inner Mongolia, poorer counties of Heihe, Qiqihar and Suihua in Heilongjiang Province. This article also reveals that we can use the methods of exploratory spatial data analysis as the supplementary analysis methods in regional economic analysis. 展开更多
关键词 regional disparity spatial analysis northeast economic region spatial autocorrelation
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Progress of regional economic geography in China: a comparative study 被引量:7
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作者 LIU Shu-guang CHEN Cai(Department of Geography, Northeast Normal University, Changchun 130024, China) 《Journal of Geographical Sciences》 SCIE CSCD 1999年第3期257-263,共7页
Domestic and international literatures in economic geography in recent years showthat the disciplinary status of regional economic geography remains steay. Domesticliteratures prefer regional comprehensive development... Domestic and international literatures in economic geography in recent years showthat the disciplinary status of regional economic geography remains steay. Domesticliteratures prefer regional comprehensive development than that of international in theapplication fields. The process of establishing theoretical system with Chinese characteristocscontinues and has made some progress. The economic regions element theory, developmenttheory and management theory have been added to the already existed theory system. Theconstruction of comprehensive and integrated methodology system has initiated. 展开更多
关键词 regional economic geography PROGRESS China
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Hub-and-Spoke System in Air Transportation and Its Implications to Regional Economic Development——A Case Study of United States 被引量:4
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作者 SONG Wei MA Yanji 《Chinese Geographical Science》 SCIE CSCD 2006年第3期211-216,共6页
Considerable changes have taken place in commercial passenger air transport since the enactment of the 1978 Airline Deregulation Act in the US and the deregulation of airline networks that has occurred elsewhere. The ... Considerable changes have taken place in commercial passenger air transport since the enactment of the 1978 Airline Deregulation Act in the US and the deregulation of airline networks that has occurred elsewhere. The commercial and operational freedoms have led most of the larger carriers to develop hub-and-spoke networks, within which certain cities or metropolitan areas emerge as key nodes possessing tremendous advantages over other locations in the air transport system. This paper examines the nature of hub-and-spoke operations in air transportation services, and the benefits that accrue to a city or geographical region that is host to an airline hub. In particular, it looks into linkages between the air service hub and local economic development. Four potential types of impact of airports on the regional economy are defined and discussed. As an example, the assessment of the economic impacts of Cincinnati-Northern Kentucky International Airport (CVG), a major Delta Airlines hub, is introduced. 展开更多
关键词 Hub-and-Spoke System air transportation regional economic development
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Regional Financial Development and Regional Economic Growth: An Empirical Analysis of Suzhou City, China 被引量:2
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作者 LIU Yong LI Weiping 《Chinese Geographical Science》 SCIE CSCD 2010年第3期269-274,共6页
There are many defects in researches on the relationship of the regional financial development (FD) and economic growth of China, such as simply assuming the causality direction, not highlighting financial institution... There are many defects in researches on the relationship of the regional financial development (FD) and economic growth of China, such as simply assuming the causality direction, not highlighting financial institution, using incomplete financial indicator, etc. This article, taking Suzhou City of Jiangsu Province, China as a case, builds a simple model to study the level of FD from three aspects of financial scale, structure and institution. Three original indicators of PRIVY (private investment/aggregate investment), DEPTH (aggregate loan/GDP) and FDIVG (FDI/GDP) are used to construct the FD economic indicator through Principal Component Analysis approach. Then we use Granger method to analyze the relationship between the FD and the economic growth of Suzhou. Empirical test results show that the FD of Suzhou is the Granger reason of economic growth, while economic growth is not the reason for FD, because the relationship between the FD and the economic growth of Suzhou is just in the ″supply-leading″ period. In terms of Suzhou experiences, the local government should strengthen the protection of private investment, improve the institutional environment, and establish the reasonable financial structure. So we can concluded that FD could play a great role in promoting economic growth at the economy takeoff stage. 展开更多
关键词 financial development regional economic growth INSTITUTION Granger Causality Analysis
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Economic Regionalism: A Win-Win Option 被引量:1
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作者 Zhao Jinpong is a Research Professor and Director of Department for Foreign Economic Studies, Development Research Center of the State Council. 《Contemporary International Relations》 2003年第11期6-10,共5页
Economic regionalism in East Asia lags far behind the quickened pace of southward thrust of the North America Free Trade Area (NAFTA) and eastern extension of the European Union. Despite aspirations for regional econo... Economic regionalism in East Asia lags far behind the quickened pace of southward thrust of the North America Free Trade Area (NAFTA) and eastern extension of the European Union. Despite aspirations for regional economic cooperation on the part of the nations concerned , differences in their stage of economic development, the burning issues facing them and varying domestic pressures against trade liberalization have resulted in insufficient urgency and driving force for 展开更多
关键词 FTA A Win-Win Option FORM economic regionalism been
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Industrial Agglomeration Externalities, City Size, and Regional Economic Development: Empirical Research Based on Dynamic Panel Data of 283 Cities and GMM Method 被引量:3
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作者 ZHU Huayou DAI Zejuan JIANG Ziran 《Chinese Geographical Science》 SCIE CSCD 2017年第3期456-470,共15页
Local governments have long been ardently pursuing the industrial specialization effect(MAR externalities) and industrial diversification effect(Jacobs externalities). Such a pursuit has resulted in severe distortion ... Local governments have long been ardently pursuing the industrial specialization effect(MAR externalities) and industrial diversification effect(Jacobs externalities). Such a pursuit has resulted in severe distortion of resource allocation and negative effect on sustainability of local economic development. Regarding the effect from both MAR and Jacobs externalities on local economic development existing literature records notable disputes. Therefore, for local economic development, one important issue is which externality(MAR or Jacobs) can better bring the effect into play. By studying a panel data of 283 Chinese cities from 2003 to 2012 and applying dynamic plane data GMM method, this paper conducted a regression analysis of the relationship among industrial agglomeration externalities, city size, and regional economic development. The result indicates that with regard to the whole nation, MAR externalities are conducive to regional economy development whereas Jacobs externalities will, to an extent, restrain regional economic development. As regards eastern, middle, and western regions, MAR externalities are conducive only to the economic development of the eastern region; their effects on middle and western regions are insignificant. Moreover, the interaction item between MAR externalities and city size has a significant negative synergistic effect on national economic development and a certain acceleration effect on eastern region as well as a strong negative synergistic effect on the middle region and an insignificant effect on the western region. The interaction item between Jacobs externalities and city size has a positive synergistic effect on only the middle region and has an insignificant synergistic effect on both eastern and western regions. Capital stock and labor input have significant accelerating effects on GDP growth per capita of Chinese cities, whereas material capital and labor input remain primary driving forces for Chinese local economic development. Furthermore, human capital contributes to accelerating urban economic development, whereas government intervention restrains urban economic development. 展开更多
关键词 MAR externalities Jacobs externalities city size regional economic development
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The Role of China's High-Tech Zones in Its Regional Economic Development 被引量:2
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作者 刘瑞明 赵仁杰 《China Economist》 2016年第5期44-56,共13页
National high-tech industrial development zones represent a major strategy of the Chinese government in developing high-tech industries and spurring regional economic growth. The effect of this policy is yet to be pro... National high-tech industrial development zones represent a major strategy of the Chinese government in developing high-tech industries and spurring regional economic growth. The effect of this policy is yet to be proven. Based on the panel data of 283 Chinese cities between 1984 and 2012, this paper investigates the effect of high-tech zones on regional economic development. Empirical results suggest that first, national hightech zones have remarkably enhanced regional GDP and per capita GDP growth, and this conclusion still holds true after multiple rounds of robustness test; second, the economic effect of national high-tech zones is subject to diminishing marginal return and compared with higher-tier cities, lower-tier cities benefited more from the creation of national hightech zones. This paper concludes that national high-tech zones where special policies are experimented and offered not only drive economic development but, if properly distributed across regions, may help reduce regional economic disparities as well. The results of this study provide important implications for the future distribution of national high-tech zones and the creation of other relevant policies. 展开更多
关键词 national high-tech zones regional economic growth difference-in-differences method
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Explore the impact of e-commerce network on development of regional economic 被引量:2
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作者 Maarina 《International Journal of Technology Management》 2014年第12期13-14,共2页
In the era of rapid development of the Intemet, people began to adapt to the huge growth of the Internet to facilitate people' s daily lives, people have been accustomed to staying at home and can easily enjoy the co... In the era of rapid development of the Intemet, people began to adapt to the huge growth of the Internet to facilitate people' s daily lives, people have been accustomed to staying at home and can easily enjoy the convenience and needs of life to achieve quick and easy lifestyle. The advent of the Internet age also become more virtual to business models, and now the development of enterprises has involved the application of e-commerce technology, the company' s business model combines network through electronic technology to some extent, and it made great adjustments and changes in order to deal with the new face of increasingly fierce competition in the market. Thus a new term: "E-commerce" is well known and accepted as more and more people. A regional economic development need of the residents' daily consumption is driven, so local governments need to focus on the various steady development of local small and medium enterprises. Therefore, the development of electronic commerce network technology can indirectly affect a region' s economic development. This paper discusses this issue. 展开更多
关键词 e-commerce model Network IT regional economic development
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Impact of openness, economic policy reform and regional shocks on trade and growth of Thailand: An econometric study 被引量:1
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作者 Thanet Wattanakul 《Chinese Business Review》 2009年第1期17-30,共14页
Thailand has currently enhanced and promoted intensive trade and investment liberalization and implemented long-term growth policy according with current regional economic integration, WTO obligations and globalizatio... Thailand has currently enhanced and promoted intensive trade and investment liberalization and implemented long-term growth policy according with current regional economic integration, WTO obligations and globalization. Nevertheless, several recent internal and external factors e.g. the massive SARS and avian flu outbreaks, the Indian Ocean tsunami devastation, the Asia financial crisis and domestic policy reforms (ICSEAD, 2006) have also impeded this policy. While the issues are important for Thailand and developing countries in Asia, only limited research has been undertaken to investigate them. The paper conducts a substantive quantitative study to contribute to these trade and development policy issues. A new econometric modelling policy method, namely the generalized gravity theory (Tran Van Hoa, 2004) is used to develop a simple flexible simultaneous-equation econometric model of Thailand's openness model with its seven major trade partners (ASEAN-4, Australia, the USA, the EU, China, Japan and India). Using data from the ICSEAD, the World Development Indicators and the Bank of Thailand databases, the paper reveals efficient and reliable empirical findings on trade-growth causality, trade determination including the impact of shocks and policy reform on trade and growth between Thailand and its major trade partners over the past two decades. The paper also provides evidence on the linkages between trade in goods, FDI and services and regional economic integration for more credible policy implications. 展开更多
关键词 trade and investment liberalization regional economic integration free trade agreements trade and growth causality generalized gravity theory modelling economic and trade policy
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Research on the correlation between regional economic growth and culture industry of our nation 被引量:1
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作者 Zhiyi Zhu 《International Journal of Technology Management》 2013年第4期104-106,共3页
For a nation, culture is not only the promotion and enhancement to the national spirit and the realm of life, but also an essential content and indispensable support force to achieve economic development, it is the im... For a nation, culture is not only the promotion and enhancement to the national spirit and the realm of life, but also an essential content and indispensable support force to achieve economic development, it is the important cause and prominent of the overall strength and the main carrier and specific embodiment of a nation's "soft power", besides, it also represents the degree of civilization, level of development and height of this nation. Culture and cultural industry endow with the modern culture with new meaning, it requires that at the time we achieve the prosperity and development of culture, we must actively explore and operate a scientific mechanism which is most able to release the energy of the culture and play cultural efficiency, and then develop the industrial pathway of the cultural. Cultural industry is a little different from the general industry. This causes the special natm-e of the cultural industry which is different from other industries. Different water and soil raised different people, inheriting national culture and developing cultural industry can be described as the unity of the three ones. 展开更多
关键词 regional economic growth culture industry nation.
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Research on the coordinated utilization of land resource in the intergrated economic region of industry, farming and grazing-a case study of Baotou city in Inner Mongolia
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作者 Wu Xianhui1, Guan Zhuojin2, YANG Yu-mei3 (1. Department of Resource and Environmental Science, Baotou Teachers College, 014030 2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110015 3.Baotou Medical College, Baotou 014010, Chin 《Journal of Geographical Sciences》 SCIE CSCD 2000年第4期135-139,共5页
Baotou City is an industrial city developed in the farming-grazing transitional zone in northern China. The development of industry, farming and grazing is very fast. It has become a typical intergrated economic regio... Baotou City is an industrial city developed in the farming-grazing transitional zone in northern China. The development of industry, farming and grazing is very fast. It has become a typical intergrated economic region of industry, farming and grazing. Based on the analysis of utilization of land resources, this paper points out the main conflicts and problems on the utilization of land resources in the city, and puts forward a corresponding proposal. 展开更多
关键词 land resource coordinate utilization intergrated economic region Baotou City
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A PRELIMINARY APPROACH TO THE REGIONALIZATION OF THE MARINE COMPREHENSIVE ECONOMIC REGION IN LIAONING PROVINCE
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作者 ZHANG Yao-guang 《Chinese Geographical Science》 SCIE CSCD 2000年第4期69-78,共10页
China is a country with a vast marine territory whose area covers one third of the total land territory area. With the exploitation of marine resources and the development of marine economy, marine economic regions ha... China is a country with a vast marine territory whose area covers one third of the total land territory area. With the exploitation of marine resources and the development of marine economy, marine economic regions have been formed gradually. We shouldn’t ignore them when we divide economic regions throughout the whole nation,especially in our country. In this paper, we’ll expand division principles, practice and methods of .marine comprehensive economic region. Liaoning Province,facing the Yellow Sea and the Bohai sea, is not only a part of Round-the-Bohai Sea Economic Region, but a part of national marine econemic region. Through evaluating marine resources of Liaoning, and analyzing development of marine economy, composition of marine industries and distributional characteristic of marine economy, Liaoning marine region is divided into Bohai Sea marine economic region and Yellow Sea marine economic region based on differences of marine economy. Thereby we go further into the formation of regional marine economic region and distributional mechanism of regional marine economy. 展开更多
关键词 marine comprehensive economic region marine economy marine territory marine industry
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ORGANIZING MACRO ECONOMIC REGIONS AND ENHANCING INTER-PROVINCIAL COORDINATION AND PLANNING IN CHINA
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作者 Hu Xuwei(Institute of Geography, CAS, Beijing 100101People’s Republic of China) 《Journal of Geographical Sciences》 SCIE CSCD 1995年第1期1-9,共9页
This paper elaborates upon the purpose of macro economicroponalization and inter-provincial planning and coordination under thesocialist market system. It descnbes the characteristics and orgarnzationalforms of macro ... This paper elaborates upon the purpose of macro economicroponalization and inter-provincial planning and coordination under thesocialist market system. It descnbes the characteristics and orgarnzationalforms of macro economic regions and the principle of macro economic regionalization. The six macro economic regions-Northeast China, NorthChina, Northwest China, Middle-East China, Southwest China and South China-are divided in the paper. At the end, the paper describes somemajor programs, which requires cooperation among various involvedprovinces. 展开更多
关键词 macro economic region organization of provinces and autonomous regions planning and coordination
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Regional Economic Types and Development Strategy of Small Towns in Suburb Beijing
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作者 Han Fei Cai Jianming Liu Junping 《Chinese Journal of Population,Resources and Environment》 2010年第2期75-82,共8页
The purpose of this article is to classify the regional economic types and development dynamics of small towns in suburb Beijing by applying the classification methods developed by Nelson's method and Location Quo... The purpose of this article is to classify the regional economic types and development dynamics of small towns in suburb Beijing by applying the classification methods developed by Nelson's method and Location Quotient method into 183 small towns in Beijing.Four types of small towns are thus identified,including urban agriculture dominated towns,manufacturing dominated towns,service industry dominated towns and comprehensive type towns with balanced economic development.Within the environment of geographical information system,the spatial distribution pattern of four types of small towns with their evolution trend is analyzed.The results indicate that four types of small towns have obvious'core-periphery'spatial structure but with different functional orientations and evolution mechanisms.Based on this,the different development strategies for each type of small towns are summarized,providing a scientific reference for the differentiating planning and development strategies of these small towns. 展开更多
关键词 SUBURBS small towns regional economic types development strategy BEIJING
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Spatial Heterogeneity Analysis of PM2.5 Concentration in Central Plains Economic Region
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作者 Kaiguang Zhang Hongling Meng +1 位作者 Mingting Ba Yanmin Sun 《Journal of Geoscience and Environment Protection》 2020年第12期244-254,共11页
The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regi... The research of the spatial heterogeneity of PM2.5 concentration in an area, is of great significance for understanding its regional spatial distribution structure, exploring the transmission relationship between regions, in order to formulate joint prevention and control measures within the entire area. Based on the daily monitoring data of PM2.5 concentration in the Central Plains Economic Region in 2019, this paper utilizes cluster analysis to divide the regional PM2.5 concentration into 5 classes, builds their spatial semi-variogram model, and then utilizes interpolation analysis method to study the regional overall distribution characteristics and transmission law. The results show that the PM2.5 concentration in the Central Plains Economic Region has a medium or higher spatial autocorrelation. The critical value of the overall PM2.5 concentration in the area is 150 μg/m3, as the overall PM2.5 concentration less than the value, the PM2.5 in a region mainly comes from local emissions, as the overall PM2.5 concentration higher than the value, the influence of spatial structure on the distribution of PM2.5 concentration is gradually obvious. PM2.5 has a certain degree of spatial transmission, which mainly includes two routes as Puyang-Xingtai and Puyang-Zhengzhou, and the transmission intensity of the former is greater than the latter. 展开更多
关键词 Cluster Analysis Semi-Variogram Spatial Heterogeneity Spatial Structure Central Plains economic region
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Annual Fluxes of Heavy Metal Elements in Atmospheric Dry and Wet Depositions in the Pearl River Delta Economic Region, Guangdong Province
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作者 Lu Lu Cen Kuang 《Journal of Geoscience and Environment Protection》 2021年第5期8-14,共7页
<div style="text-align:justify;"> There are 158 sampling points to be set up in the Pearl River delta economic region. The collecting period is mostly one year, namely, from July 2007 to July 2008. The... <div style="text-align:justify;"> There are 158 sampling points to be set up in the Pearl River delta economic region. The collecting period is mostly one year, namely, from July 2007 to July 2008. The eight heavy metal elements of Cr, Ni, Cu, Pb, Zn, As, Hg, and Cd in 474 dry and wet deposition samples were tested in terms of the standard procedures. Their average annual fluxes have no obvious difference between dry deposition and wet deposition. So these elements might be at an equilibrium or quasi-equilibrium state between dry deposition and wet deposition. </div> 展开更多
关键词 Atmospheric Dry and Wet Deposition Heavy Metal Element FLUX Pearl River Delta economic region
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