Journal articles: 'Pearl River Delta'

1

Yang, Ren, Baoqing Qin, and Yuancheng Lin. "Assessment of the Impact of Land Use Change on Spatial Differentiation of Landscape and Ecosystem Service Values in the Case of Study the Pearl River Delta in China." Land 10, no. 11 (November 10, 2021): 1219. http://dx.doi.org/10.3390/land10111219.

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Industrialization and urbanization have led to continuous urban development. The rapid change in land-use type and extent has a significant impact on the capacity of ecosystem services. Changes in the landscape pattern of roads, rivers, railway stations, and expressway entrances and exits have evident geographical proximity effects. We used landscape pattern indices and ecosystem service value (ESV) to evaluate the landscape pattern and ESV spatial differentiation of the Pearl River Delta region and its typical transportation infrastructure and rivers in 1990, 2000, and 2017. The results show that rapid urbanization and industrialization have led to changes in urban land use along the Pearl River Estuary. Urban land changes on the east bank of the Pearl River are greater than urban land changes on the west bank of the Pearl River; the landscape diversity of the Pearl River Delta has increased, the connectivity of the landscape has decreased, and the degree of fragmentation has increased. Second, the city size of the Pearl River Delta was negatively correlated with the ESVs. The ESVs in the core areas of the Pearl River Delta urban agglomeration were smaller than those in the fringe areas. With the gradient change in urban land use, ESVs showed a growing trend from the city center to the surrounding areas. The key areas for ecological protection and restoration should be central urban areas and suburbs. Third, the siphoning effect of the buffer zones of railway stations and expressway entrances and exits was very strong and drove the development and utilization of the surrounding land. As the degree of land development in the buffer zone decreased, the ESVs increased. Fourth, different grades of roads in the Pearl River Delta had different impacts on the regional landscape and ESVs. County roads had a greater interference effect than expressways, national roads, and provincial roads, and the riverside plains of the Pearl River Delta have a large development space, low urban development costs, and multiple land-use activities that have profoundly changed the landscape of the river buffer zone.

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2

Williams, Michael. "Hong Kong and the Pearl River Delta Qiaoxiang." Modern Asian Studies 38, no. 2 (April 21, 2004): 257–82. http://dx.doi.org/10.1017/s0026749x04001076.

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In the history of links between people from the Pearl River Delta with the countries of South-East Asia and the Pacific, the role played by Hong Kong cannot be ignored. It is the purpose here to examine the role and contribution of Hong Kong to these Pearl River Delta links over the period 1842 to 1942. Such an examination, it is hoped, will also allow the impact of Pearl River Delta links on Hong Kong to be investigated. Much of the material presented by this paper is not new, rather the aim is to view Hong Kong from the perspective of the Pearl River Delta qiaoxiang. A perspective, it is suggested, that will enable aspects of Hong Kong's history and its contribution to the history of the Pearl River Delta counties and their overseas links to be seen in a new way.

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Guo, Yu, Ruru Deng, Jiayi Li, Zhenqun Hua, Jing Wang, Ruihao Zhang, Yeheng Liang, and Yuming Tang. "Remote Sensing Retrieval of Total Nitrogen in the Pearl River Delta Based on Landsat8." Water 14, no. 22 (November 16, 2022): 3710. http://dx.doi.org/10.3390/w14223710.

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The Pearl River Delta in South China is subject to severe eutrophication, which is significantly exacerbated by the total nitrogen (TN). Remote sensing technology with large-scale synchronous observations in the Pearl River Delta can effectively monitor organic pollution. Statistical methods based on remote sensing images have been widely used in water quality parameter retrieval for inland rivers, reservoirs, and lakes, but have seldom been applied in the Pearl River Delta. TN is also a non-optically active substance, so it is difficult to retrieve TN through analysis methods. This study retrieves the concentration of total nitrogen (TN) based on Landsat8 images of the Pearl River Delta using a statistical method. The stepwise regression function is built by analyzing the TN concentration and the single-band, two-band, and three-band spectral information groups measured by an ASD FieldSpec3 spectrometer. The retrieval results show that the proposed method performs well with a small mean absolute error (MAE) (0.36 mg/L for TN) and high agreement (R2 = 0.61 for TN) between the in situ data and the retrieval concentration. The results demonstrate that the concentration of TN in the east of the Pearl River Delta was higher than in the west. Dachan Bay and Shenzhen Bay had the highest TN concentrations, which were around 3.02 mg/L and 3.67 mg/L. The 750–850 nm band could be an important reference for further exploring the spectral characteristics and retrieval of TN. The retrieval method in this study is easy to implement and convenient for local TN distribution capture, which can provide a timely reference for daily water quality supervision and management in the Pearl River Delta.

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Huang, Qiuxia, and Wenliang Zhang. "Economic Performance Evaluation of Tourism in Pearl River Delta Based on AHP Model." Mathematical Problems in Engineering 2022 (May 4, 2022): 1–10. http://dx.doi.org/10.1155/2022/1328291.

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With the development of the times, the leading role of tourism in economic growth has become increasingly prominent. Tourism economic performance is an important standard to measure the development of its economy. However, there is no quantitative research on tourism economic performance within a single region. Therefore, on the basis of relevant research, this paper first constructs the tourism economic performance evaluation system from four aspects such as industrial scale, economic benefits, support power, and input and output. Then, based on the relevant data of tourism indicators in the Pearl River Delta in the past five years, the analytic hierarchy process was introduced to evaluate the economic performance of tourism in the Pearl River Delta. The results show that the tourism industry in the Pearl River Delta has good economic benefits and large industrial scale. However, the social motivation and input-output efficiency supporting the development of tourism are poor. Finally, according to the evaluation results, we put forward the methods and suggestions of tourism efficiency optimization in the Pearl River Delta region, so as to further promote the development of tourism in the Pearl River Delta region.

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Huang, Liang, Haowei Ti, Leigang Pei, and Ding Ma. "Research on the Problems and Development of Small and Medium Enterprises in the Pearl River Delta." E3S Web of Conferences 218 (2020): 04006. http://dx.doi.org/10.1051/e3sconf/202021804006.

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Since the reform and opening up, the economy of the Pearl River Delta has achieved rapid development and remarkable results. Small and medium-sized enterprises in the region have also achieved rapid development in terms of quantity and quality, and have become an important part of the region. However, with economic globalization, because of continuous changes in the external environment, and its own industrial upgrading and structural adjustment, even if small and medium-sized enterprises in the Pearl River Delta region have advantages compared with other regions in China. However, there are still problems in the development process. The article mainly analyzes the financing difficulties of SMEs in the Pearl River Delta region and the brain drain in recent years, and gives corresponding countermeasures. Since small and medium-sized enterprises occupy an important position in the economy of the Pearl River Delta region, they can not only promote technological innovation and boost domestic demand for production, but also drive the employment rate to rise. Therefore, the development of small and medium-sized enterprises in the region has played a positive role in the economic progress of the Pearl River Delta region, and the place has also promoted economic development.

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Zhao, Run-Hua, Jie Cheng, and Nai-Ru Xu. "The Earnings Management Strategy of List Companies in Pearl River Delta Region of China Based on Complex Network Theory." Complexity 2020 (December 10, 2020): 1–5. http://dx.doi.org/10.1155/2020/6650193.

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This paper aims to detect the methods of earnings management in Pearl River Delta region of China. The data were selected based on the list companies of Pearl River Delta region from 2008 to 2019 and the balanced panel analysis was adopted to pursue the results. After the random effect analysis, this study reaches the conclusion that downward earnings is through total assets, the difference between sales and receivables, fixed assets, and sales and upward earnings is mainly through the changes of sales by the companies in Pearl River Delta region of China.

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Lu, X. X., S. R. Zhang, S. P. Xie, and P. K. Ma. "Rapid channel incision of the lower Pearl River (China) since the 1990s." Hydrology and Earth System Sciences Discussions 4, no. 4 (July 9, 2007): 2205–27. http://dx.doi.org/10.5194/hessd-4-2205-2007.

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Abstract. This paper reported a dramatic channel incision (>10 m in the deepest cut) during the past 10 years or so in the lower Pearl River, the second largest river in terms of water discharge in China. The channel incision had caused changes both in the channel geometry as well as in the river hydraulics. Also, the water exchange between the two major tributaries of the Pearl River, the Xijiang and Beijing, had been significantly changed due to the channel incision. The rapid channel incision was principally the result of extensive sand mining in the lower Pearl River and the delta region due to the booming economy in the Pearl Delta region. Slight increase of water discharge and significant decrease of sediment load since the early 1990s in both the Xijiang and Beijiang also likely contributed to the observed dramatic river bed donwcutting to some extent. This has important implications for river management, as the large Chinese rivers have seen a dramatic depletion of sediment fluxes due to the combined effects of declining rainfall, dam constructions, water diversion, reforestation and afforestation, and sediment mining over the recent decades.

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Lu, X. X., S. R. Zhang, S. P. Xie, and P. K. Ma. "Rapid channel incision of the lower Pearl River (China) since the 1990s as a consequence of sediment depletion." Hydrology and Earth System Sciences 11, no. 6 (December 17, 2007): 1897–906. http://dx.doi.org/10.5194/hess-11-1897-2007.

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Abstract. This paper reported a dramatic channel incision (>10 m in the deepest cut) during the past 10 y or so in the lower Pearl River, the second largest river in terms of water discharge in China. The channel incision had caused changes both in the channel geometry as well as in the river hydraulics. Also, the water exchange between the two major tributaries of the Pearl River, the Xijiang and Beijiang, had been significantly changed due to the channel incision. The rapid channel incision was principally the result of extensive sand mining in the lower Pearl River and the delta region due to the booming economy in the Pearl Delta region. Slight increase of water discharge and significant decrease of sediment load since the early 1990s in both the Xijiang and Beijiang also likely contributed to the observed dramatic river bed downcutting to some extent. This has important implications for river management, as the large Chinese rivers have seen a dramatic depletion of sediment fluxes due to the combined effects of declining rainfall, dam constructions, water diversion, reforestation and afforestation, and sediment mining over the recent decades.

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9

Hu, Yu Ping, Hua Yin, and Zhi Jian Wang. "On E-Commerce Development Strategies of Pearl River Delta Region." Applied Mechanics and Materials 278-280 (January 2013): 1795–98. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.1795.

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The development of e-commerce in the Pearl River Delta Region has benefited from its sound environment. It is one of the important measures to develop e-commerce forward a new industrial road, which can promote IT-based industrialization, change the mode of economic development and improve the quality and efficiency of the national economy. This paper presents the current situation of e-commerce development in the Pearl River Delta region, analyzes its development advantages and tendency, and concludes with some existed problems and the further development countermeasures of the Pearl River Delta Region e-commerce.

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10

Wu, Yan. "Research on the Spatial Spillover Effect of the Collaborative Innovation of Science and Technology in the Pearl River Delta Urban Agglomeration." E3S Web of Conferences 253 (2021): 01013. http://dx.doi.org/10.1051/e3sconf/202125301013.

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This paper uses spatial panel VAR model to study the spatial spillover of the collaborative innovation of Science and technology in the Pearl River Delta urban agglomeration from 2010 to 2018. The empirical results show that a positive shock on the collaborative innovation of Science and technology of a city in the Pearl River Delta urban agglomeration will spread to other cities in the Pearl River Delta urban agglomeration, and will have a positive impact on the collaborative innovation of Science and technology and R & D input variables of other cities in the second period; A positive shock on the R & D input of a city will make the collaborative innovation of Science and technology and R & D input variables of the city and other cities have a positive impact in the second period; the collaborative innovation of Science and technology and R & D input variables have positive external effects in the Pearl River Delta urban agglomeration. Finally, some suggestions are put forward.

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11

Miao, Huazhang, Bing Li, Wu Li, Fei Yao, Yuliang Chen, Ruyin Chen, Jiumin Lin, Yuntao Wu, Pi Guo, and Qingguo Zhao. "Adverse birth outcomes in Guangdong province, China, 2014–2017: a spatiotemporal analysis of 2.9 million births." BMJ Open 9, no. 11 (November 2019): e030629. http://dx.doi.org/10.1136/bmjopen-2019-030629.

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ObjectivesAdverse birth outcomes pose a great threat to the public health and bring a heavy burden of disease in China. A comprehensive examination of the temporal and spatial trends of preterm birth (PTB), low birth weight (LBW) and small for gestational age (SGA) epidemics can provide some elementary information for subsequent aetiological and epidemiological studies. This study aimed to characterise the spatiotemporal features of PTB, LBW and SGA based on a large cohort of live births in China.DesignSpatiotemporal descriptive analysis was performed in Guangdong province, China, from 2014 to 2017.SettingData involving 2 917 098 live births in Guangdong province, China from 2014 to 2017 was collected from Guangdong Birth Certificate System. Information was collected, including the date of birth, gestational age in week, birth weight, sex of the infant, age of the mother and registered residence of the mother.ResultsThe estimated rate of PTB, LBW and SGA was 4.16%, 4.14% and 12.86%, respectively. For temporal trends, the rates of PTB, LBW and SGA showed seasonal fluctuations, especially for LBW and SGA. In addition, there were regional differences in the rates of PTB, LBW and SGA between the Pearl River Delta and Non-Pearl River Delta regions. From 2014 to 2017, the high rates of PTB and LBW expanded from the Pearl River Delta region to the Non-Pearl River Delta regions. However, compared with the Pearl River Delta region, the rate of SGA was higher in the Non-Pearl River Delta regions on the whole.ConclusionThe findings of this study contribute to the understanding of the aetiology and epidemiology of PTB, LBW and SGA in south China.

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12

Hu, Panpan, Feng Li, Xiao Sun, Yali Liu, Xinchuang Chen, and Dan Hu. "Assessment of Land-Use/Cover Changes and Its Ecological Effect in Rapidly Urbanized Areas—Taking Pearl River Delta Urban Agglomeration as a Case." Sustainability 13, no. 9 (April 30, 2021): 5075. http://dx.doi.org/10.3390/su13095075.

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Based on the land-use data of 2000 and 2015, this study makes a quantitative analysis of the ecological environment effect in Pearl River Delta using the ecological environment quality index and the ecological contribution rate of land-use change types. The results showed the following: (1) During 2000–2015, the land-use changes in Pearl River Delta mainly manifested in the reduction of cultivated land, forest land, water area, and unused land, while the area of construction land and grassland showed an increasing trend. The quality of ecological environment in the Pearl River Delta was largely stable but slightly declined overall; (2) Over the past 15 years, the comprehensive ecological environment index of the Pearl River Delta urban agglomeration has decreased by 0.02. With an average annual decrease of 0.11%. The spatial expansion caused by urbanization had the most profound impact on the decline of the ecological environment quality in the Pearl River Delta; (3) The eco-environmental quality indices of various cities in the Pearl River Delta declined to varying degrees. The city with the largest decline was Dongguan, followed by Shenzhen and Zhongshan. The spatial differentiation characteristics of the eco-environmental quality index indicate that the ecological quality preferences of cities distributed around the study area and close to the inland areas, while the ecological quality of the central coastal cities are biased. The quality of the ecological environment is related to the basis of the regional ecological environment. The research results have important practical significance for maintaining regional ecological balance and promoting the sustainable use of land resources, and they provide a reference for the study of the ecological and environmental effects of land-use changes in key cities in economically developed areas.

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13

Wang, Xianwei, Yu Guo, and Jie Ren. "The Coupling Effect of Flood Discharge and Storm Surge on Extreme Flood Stages: A Case Study in the Pearl River Delta, South China." International Journal of Disaster Risk Science 12, no. 4 (June 2, 2021): 1–15. http://dx.doi.org/10.1007/s13753-021-00355-5.

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AbstractThe low-lying Pearl River Delta in South China is subject to severe flood threats due to watershed floods, sea level rise, and storm surges. It is still unknown to what extent and how far inland storm surges and sea level rise impact the extreme flood stages. This study investigated the coupling effect of flood discharge and storm surge on the extreme flood stages in the Pearl River Delta by using on site observations and simulations generated by the Hydrologic Engineering Center-River Analysis System model. The results show that flood discharges dominated the flood stages in the middle and upper Pearl River Delta, while the storm surges had maximum impact near the river mouth. The storm surges and flood stages showed a significant increase after 2002 in the Hengmen waterway. The design flood stages for the post-2002 period were 0.23–0.89 m higher than the pre-2002 ones at Hengmen at the six return periods from 5 to 200 years examined in this study. Their difference declined toward the upper waterway and reduced to zero about 23 km away from the Hengmen outlet. The coincidence of extreme flood discharges and storm surges further escalates the extreme flood stages in the lower 30 km of estuarine waterways. Our results quantify the severe threats due to sea level rise and intensified storm surges in the lower Pearl River Delta, and are significant for urban planning and designing and managing flood control facilities in the Pearl River Delta and in other coastal fluvial deltas.

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Chuntao, Huang, Lu Jifu, and Liao Qifeng. "Analysis of the Spatial and Temporal Variation Characteristics of Ozone in the Pearl River Delta Region from 2016 to 2020." E3S Web of Conferences 245 (2021): 02025. http://dx.doi.org/10.1051/e3sconf/202124502025.

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Based on the historical data of air ozone monitoring of Pearl River Delta from 2016 to 2020, the temporal and spatial variation characteristics of ozone in the Pearl River Delta were analyzed. The results showed that the mean change curves of Q3 in the seven cities in the Pearl River Delta region from 2016 to 2020 were M-shaped, and the change trend was basically the same, except Huizhou and Zhuhai. The over standard rate of daily mean value of Q3 in Jiangmen City from 2016 to 2020 was more than 10%, and the over standard situation of daily mean value of Q3 was serious. In the Pearl River Delta region, the change trend of the monthly mean value of Q3 in the same year was basically the same. On the whole, the mean value from August to November was higher, and the mean value in June was lower. The peak of Q3 concentration appeared between 12:00 and 16:00 in the daytime, and it was generally low at night.

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QIN, Chenglin, Ni HUO, and Zhaohui CHONG. "Intercity Rail Transit and Integrated Development of the Pearl River Delta Urban Cluster: Based on the Perspective of Network Analysis." Chinese Journal of Urban and Environmental Studies 03, no. 03 (September 2015): 1550024. http://dx.doi.org/10.1142/s2345748115500244.

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Intercity rail transit is an important power promoting the integrated development of urban clusters. This paper adopts a social network analysis to analyze the impact of the intercity rail development on the integration of the Pearl River Delta urban cluster in 2010, 2012, and 2020, respectively. The results show that the development of intercity rail transit is generally conducive to enhancing the network development trend of the Pearl River Delta urban cluster, strengthening the inter links and promoting the division of labor within the urban cluster, reinforcing the status of the center cities, thus promoting the integrated development of the Pearl River Delta urban cluster. However, the development of intercity rail transit still cannot break the former core–periphery structure, which may aggravate the unbalanced development among cities. Therefore, on the one hand, accelerating the construction of intercity rail transit is an important path to promote the integrated development of the Pearl River Delta urban cluster; on the other hand, it is necessary to optimize the intercity rail network planning, so that the adverse impact could be mitigated.

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Liu, Li. "Research on Industrial Agglomeration and Isomorphism of Manufacturing Industry in Pearl River Delta." International Journal of Business Studies and Innovation 1, no. 1 (September 30, 2021): 68–74. http://dx.doi.org/10.35745/ijbsi2021v01.01.0008.

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As a national strategy, the construction of Guangdong-Hong Kong-Macao Greater Bay Area is of great significance. The Pearl River Delta is one of the core regions of the Guangdong-Hong Kong-Macao Greater Bay Area and important for the upgrading of innovative manufacturing industries. It is important to enhance the competitiveness of those areas and optimize industrial structure by promoting the division of labor between cities. The quantitative research on the industrial agglomeration and industrial isomorphism of the manufacturing industry in nine cities in the Pearl River Delta shows that each city has formed its specialized manufacturing industry, and the phenomenon of industrial isomorphism has been improved by the unified planning of the manufacturing industry in the Pearl River Delta.

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Zhao, Chu. "Technological Innovation to Optimize the Industrial Structure of Manufacturing in the Pearl River Delta." Advanced Materials Research 875-877 (February 2014): 1165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1165.

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Technical innovation is the necessary path for industry in Pearl River Delta to success in industrial transformation and upgrading, the research about how to keep the total increase in the basis as well as to optimize the export structure of manufacturing, and how to keep the whole manufacturing benefits of the Pearl River Delta region sustainably is very necessary. Firstly, this paper adopts the multiple regression analysis to analyze how the technological innovation to optimize the industrial structure of manufacturing in the Pearl River Delta region. Secondly, the author makes a detailed explanation about the technical innovations impact on the manufactured exports with three different technology levels (high-to-low). Finally, this paper offers some specific advice according to the analysis results.

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Li, Kun Ming, and Li Hua Zhao. "Research on Thermal Environment of Village in Pearl River Delta Region." Applied Mechanics and Materials 368-370 (August 2013): 1881–87. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1881.

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At present the tradition layout and landscape characteristic of village are disappearing gradually in the Pearl River Delta region. With the rural residential branch out into high-density and multi-storey, the scale space in village is disappearing in the Pearl River Delta region. The wind field, temperature field, moisture and atmospheric particle distribution of village are changed along with the transition, which lead to the village thermal environment deteriorative. In view of this, the thermal environment of village is simulated, based on the 3D microclimate model ENVI-met. The simulation results show that the layout and the underlying surface structure of the village have a direct relationship with the air temperature and wind speed in village in the Pearl River Delta region.

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Daming, Zhou, and Zhang Yingqiang. "Rural Urbanization in Guangdong's Pearl River Delta." Chinese Sociology & Anthropology 28, no. 2 (December 1995): 47–102. http://dx.doi.org/10.2753/csa0009-4625280247.

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Marks, Robert. "Robert Marks on the Pearl River Delta." Environmental History 9, no. 2 (April 2004): 296. http://dx.doi.org/10.2307/3986088.

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Poon, Michelle, and Wilhelm E. J. Klein. "Identity Crisis in the Pearl River Delta." Digital Culture & Society 3, no. 1 (July 26, 2017): 159–84. http://dx.doi.org/10.14361/dcs-2017-0111.

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Abstract This paper is a conversation-based reflection on hacker-, maker- and DIY-culture. It focuses on the unique cultural and socio-economic setting of Hong Kong, using Dim Sum Labs, its first hacker/makerspace as its primary subject of investigation. To provide context, we begin with an outline of the cultural, economic and physical challenges presented by Hong Kong. We then proceed to present and relay conversation pieces from interviews with members and non-members of Dim Sum Labs, who speak about their respective perspectives on notions of “hacking,” “making” and “DIY-culture.” Finally, we provide some reflections on our own experiences as members of the hacker/maker/ DIY-culture and past directors of Dim Sum Labs.

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Yeung, Yue‐man. "Emergence of the pan‐pearl river delta." Geografiska Annaler: Series B, Human Geography 87, no. 1 (March 2005): 75–79. http://dx.doi.org/10.1111/j.0435-3684.2005.00179.x.

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Yang, Jian, Weihong Li, Jieying Chen, and Caige Sun. "Refined Carbon Emission Measurement Based on NPP-VIIRS Nighttime Light Data: A Case Study of the Pearl River Delta Region, China." Sensors 23, no. 1 (December 24, 2022): 191. http://dx.doi.org/10.3390/s23010191.

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The accurate measurement of CO2 emissions is helpful for realizing the goals of “carbon neutralization” and “carbon peak”. However, most current research on CO2 emission measurements utilizes the traditional energy balance coefficient and top-down methods. The data granularity is large, and most studies are concentrated at the national, provincial, municipal, or district/county administrative unit scale. As an important part of the Guangdong–Hong Kong–Macao Greater Bay Area of China, the Pearl River Delta region has good nighttime light vitality and faces huge carbon emission pressure. Using the Pearl River Delta as the research area, this study constructed an optimized pixel-scale regression model based on NPP-VIIRS (The Visible Infrared Imaging Radiometer Suite on the Suomi National Polar-Orbiting Partnership spacecraft) nighttime light data and CO2 emissions data at the district and county levels for 2017. In addition, the spatial pattern of CO2 emissions in the Pearl River Delta was analyzed based on the predicted CO2 emission status. The results showed that the spatial pattern of CO2 emissions in the Pearl River Delta had the distinct characteristics of the “center-edge” effect, the spatial spillover effect, and high-value aggregation, which should be considered when making related social or public decisions.

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Sun, Caige, Shengyong Zhang, Chuncheng Song, Jianhui Xu, and Fenglei Fan. "Investigation of Dynamic Coupling Coordination between Urbanization and the Eco-Environment—A Case Study in the Pearl River Delta Area." Land 10, no. 2 (February 13, 2021): 190. http://dx.doi.org/10.3390/land10020190.

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The interaction between urbanization and the eco-environment is usually viewed as an effect–feedback framework. Its coupling system is composed of urbanization and eco-environment subsystems. In this paper, the coupling degree (CD) and the coupling coordinated degree (CCD) are used to reflect the coupling interaction and coupling coordination between the urbanization subsystem and the eco-environment subsystem. Based on the dynamic relative quantities of urbanization and eco-environment data in the Pearl River Delta, CD and CCD values were calculated, and the spatiotemporal evolution trend of coordination was analyzed. The results show that (1) from 2000 to 2015, the nine cities in the Pearl River Delta had high CD values and CCD values. Though they had different performances in different periods, they were all in a coordinated class, including good coordination (GC), moderate coordination (MC), and bare coordination (BC). (2) In terms of temporal evolution, the coupling coordination between urbanization and the eco-environment in the entire Pearl River Delta greatly improved. (3) From the perspective of spatial distribution, the coupling coordination of the central region was higher than that of the peripheral regions, and that of the west bank of the Pearl River was higher than that of the east bank of the Pearl River. These results can help local policy makers enact appropriate measures for sustainable development.

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Chen, Hongyi. "Research on the Efficiency of Financial Technology in the Pearl River Delta Region." BCP Business & Management 15 (December 30, 2021): 291–98. http://dx.doi.org/10.54691/bcpbm.v15i.287.

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The deep integration of science and financial industry has become an important development strategy for building an innovation-driven country. As the forefront of China's reform and opening up, the Pearl River Delta region shoulders the important task of studying the development and influencing factors of Fin-Tech efficiency. Based on the panel data of nine major cities in the Pearl River Delta region from 2010 to 2018, this paper selects input and output indicators from aspects of manpower and capital, and uses DEA-Malmquist index model to measure the efficiency of Fin-Tech. The results demonstrate that during the period studied, the annual average Fin-Tech efficiency in the Pearl River Delta region presents an alternately fluctuating trend of "up-down". Among the inner cities, there are significant differences in the efficiency of Fin-Tech due to different regional development. Moreover, this paper explores the reasons from the aspects of macro economy, policy regulation and local development, and provides corresponding suggestions.

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Yan, Dongsheng. "Measurement and Comparison of the Innovation Spatial Spillover Effect: A Study Based on the Yangtze River Delta and the Pearl River Delta, China." Systems 11, no. 2 (February 8, 2023): 90. http://dx.doi.org/10.3390/systems11020090.

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Innovation is an important factor to improve the quality of economic growth, and amplifying the innovation spatial spillover effect is an important measure to support the development of innovation. Scholars have carried out diversified research on the innovation spatial spillover effect, but there is still practical significance for deepening the research on the spatial spillover effect. In particular, the multi-angle comparative study in different regions still has research value, especially for the field of urban agglomeration integration. The spatial econometric model is a common method to measure spatial spillover effect. In order to carry out a multi-angle comparative study of innovation spatial spillover effects in different regions, this study takes two typical integrated urban agglomerations of the Yangtze River Delta and the Pearl River Delta in China as the object, and conducts a comparative study of the evolutionary characteristics of innovation spatial spillover effects based on urban scale data and the spatial econometric model. Differently from previous studies, invention patents are adopted to characterize the innovation level. The results show that there are significant positive innovation spatial spillover effects in the Yangtze River Delta and the Pearl River Delta, and the spatial spillover effect in the Yangtze River Delta is stronger. The spatial spillover effect exhibits significant spatiotemporal heterogeneity. For example, the spatial spillover effect in the core region and the fringe region of the urban agglomeration exhibits a positive effect, but the Yangtze River Delta is stronger than the Pearl River Delta. As an important innovation, the spatial spillover effects both exhibit the evolutionary characteristics of “inverted U-shape” based on the changes in geographical distance, and the spatial spillover effect of the Yangtze River Delta is always larger. Based on the empirical research, we propose promoting high-quality development by strengthening urban agglomeration cooperation, realizing urban agglomeration expansion in an orderly way, and improving the macro-political system.

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Chen, Shulin, Zhenghao Zhu, Xiaotong Liu, and Li Yang. "Variation in Vegetation and Its Driving Force in the Pearl River Delta Region of China." International Journal of Environmental Research and Public Health 19, no. 16 (August 19, 2022): 10343. http://dx.doi.org/10.3390/ijerph191610343.

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Vegetation is an important part of a regional ecological environment and vegetation coverage can reflect the health of a regional ecological environment. Through an analysis of and research into changes in the vegetation NDVI (normalized difference vegetation index) and its driving factors in the Pearl River Delta region, the spatial–temporal pattern of vegetation changes and the driving factors can be measured. It is of significance to improve the ecological environment quality of the Pearl River Delta region and to promote the sustainable development of the regional economy. Based on SPOT/VEGETATION NDVI satellite remote sensing data, meteorological data, population density data, and gross domestic product (GDP) data during the period 2000–2019, this paper analyzed the temporal and spatial trends of the vegetation NDVI as well as the climate factors and human activities in the Pearl River Delta on a pixel scale. The correlations between the vegetation NDVI and precipitation, temperature, population density, GDP, and other factors were also estimated. The results showed that during the period 2000–2019, the annual mean NDVI significantly increased, with a growth rate of 0.0044 (R2 = 0.71, p < 0.0001). The NDVI in the center of the Pearl River Delta was lower than that in other regions. As far as the driving factors of the NDVI were concerned, among the climatic factors, the response of the NDVI to temperature was higher than that for precipitation in the Pearl River Delta. Human activities had changed from a negative hindering effect on the NDVI to a positive promoting effect. The correlation between the NDVI and the GDP was higher than that for population density. Policy factors such as the “Grain for Green Project” as well as an increase in the sown area of crops and land use changes were also important driving factors of the NDVI. It is suggested that the NDVI can be increased by the implementation of artificial afforestation policies, building a “Green City”, and moderately increasing the sown area of crops.

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28

Lo, V. H. Y., D. Sculli, and A. H. W. Yeung. "Supplier quality management in the Pearl River Delta." International Journal of Quality & Reliability Management 23, no. 5 (June 2006): 513–30. http://dx.doi.org/10.1108/02656710610664587.

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Cheng, Joseph Y. S., and Mo Shixiang. "Evolution of the Pearl River Delta Development Strategy." Journal of Comparative Asian Development 3, no. 2 (September 2004): 281–307. http://dx.doi.org/10.1080/15339114.2004.9678403.

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Zhang, Wei, Yang Xu, A. J. F. Hoitink, M. G. Sassi, Jinhai Zheng, Xiaowen Chen, and Chi Zhang. "Morphological change in the Pearl River Delta, China." Marine Geology 363 (May 2015): 202–19. http://dx.doi.org/10.1016/j.margeo.2015.02.012.

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Yeung, Yue-man. "The Further Integration of the Pearl River Delta." Environment and Urbanization ASIA 1, no. 1 (March 2010): 13–26. http://dx.doi.org/10.1177/097542530900100103.

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Lancia, Michele, Huang Su, Yong Tian, Jintai Xu, Charles Andrews, David N. Lerner, and Chunmiao Zheng. "Hydrogeology of the Pearl River Delta, southern China." Journal of Maps 16, no. 2 (May 13, 2020): 388–95. http://dx.doi.org/10.1080/17445647.2020.1761903.

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Jin, Xue Li, Xiang Yu Luo, and Qing Lin Meng. "Effect of Equilibrium Moisture Contents on Insulating Performance of Autoclaved Aerated Concrete Blocks." Advanced Materials Research 216 (March 2011): 479–84. http://dx.doi.org/10.4028/www.scientific.net/amr.216.479.

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In this paper, a research was performed which considers the material characteristics of autoclaved aerated concrete (AAC) blocks and the weather characteristics in Pearl River Delta region. The AAC blocks laws of absorption and desorption and its thermal conductivity under different equilibrium moistures were measured. The experimental results show that equilibrium moisture content (EMC)is 6.27% for AAC blocks with a B07 density in hot and humid areas in the Pearl River Delta region including the city of Guangzhou, and the correction coefficient of the thermal conductivity is 1.5.

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Ao, Qing Feng. "Analysis the Transformation and Upgrading Path of the Ports in Pearl River Delta." Applied Mechanics and Materials 587-589 (July 2014): 1771–75. http://dx.doi.org/10.4028/www.scientific.net/amm.587-589.1771.

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Through comprehensive analysis of all aspects of the environment of the Pearl River Delta ports, and the article carries out reasonable positions for ports. Using Grey Relational Theory calculated the related degree between ports and industry. Using the Industry aggregation principle which is based on the Location quotient researches the gathering and transferring trend of industry which is closely related to ports. Further this paper analysised the direction of the transformation and upgrading of the ports. And we can provide the transformation and upgrading path of ports in the Pearl River Delta.

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Zhou, Yu Fei, and Yi Cheng Deng. "Hunan Undertook an Obstacle to the Transfer of the Pearl River Delta Industry in Analysis Internet Era." Applied Mechanics and Materials 719-720 (January 2015): 1290–96. http://dx.doi.org/10.4028/www.scientific.net/amm.719-720.1290.

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Some enterprises of the Pearl River Delta had invested in Hunan province, and they played significant roles in Hunan’s economic development. However, the contribution to economic growth in general was not obvious in Hunan. According to the quantitative analysis that Hunan undertook an obstacle to the shift of the Pearl River Delta Industry. It could be found: The actual utilization of foreign investment in Hunan, Hunan road length, the balance of rural and urban residents in Hunan, Hunan consumption level and years of commodity market turnover, these five variables are the key barriers that Hunan could not take over the transfer successfully in Internet era. Five variables representing the Government's institutional arrangements for attracting foreign investment, transport infrastructure, subject to cultural constraints on investment entrepreneurial spirit, the regional market factors in Hunan that be decided from the regional market size and level of development. Therefore, to speed up the transfer of industries in Hunan docking the Pearl River Delta, it must be focused on several aspects of the above and then do the reform and innovation.

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Yan, Yichen, Hongrun Ju, Shengrui Zhang, and Wei Jiang. "Spatiotemporal Patterns and Driving Forces of Urban Expansion in Coastal Areas: A Study on Urban Agglomeration in the Pearl River Delta, China." Sustainability 12, no. 1 (December 25, 2019): 191. http://dx.doi.org/10.3390/su12010191.

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Since the beginning of the 21st century, the spatial pattern of urban expansion and the mechanism of urbanization in coastal areas have undergone significant changes. This study aims to reveal the spatiotemporal patterns of urban land expansion and analyze the dynamic driving forces of urban agglomeration in the Pearl River Delta of China from 2000 to 2015. The urban-land-expansion intensity index, expansion difference index, and fractal dimension were used to study how the urban land in this area was developed, and the geographical detector was applied to explore the relative importance, expansion intensity, and interactions of physical and socioeconomic factors. The results revealed that the urban-land-expansion intensity of the Pearl-River-Delta urban agglomerations exhibit a downward trend, while cities exhibited a trend of developing more coordinately from 2000 to 2015. Physical factors determined the direction and scale of urban development, and the urban land expansion in the Pearl-River-Delta urban agglomeration is mainly distributed in plain areas that have an elevation below 120 m and a slope less than 5°. Socioeconomic factors have a greater influence on the expansion of urban land, and their effects have changed over time. Population growth and economic development has played a significant role in the expansion of urban land before 2005. Subsequently, the factor of GDP and distance to the core cities of Guangzhou and Shenzhen controlled the expansion to the greatest extent. The impacts of various factors tended to become balanced during 2010–2015. The majority of the factors enhanced each other via their interactions, and the distance to the rivers always exhibited a greater enhancement when there was interaction with other factors. The spatial and temporal analysis of the urban expansion and the mechanism of the Pearl River Delta urban agglomeration could provide useful information for coastal urban planning. This study also offers new knowledge regarding the interactions between different drivers of urban land expansion.

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Zhu, Guo Fei, and Hong Zhi Cui. "Application of Structural Lightweight Aggregate Concrete in the Pearl River Delta." Advanced Materials Research 368-373 (October 2011): 3145–49. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.3145.

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In this paper, the research on properties of existing main structural lightweight aggregate (LWA) in the China Pearl River Delta as well as the application of corresponding structural lightweight aggregate concrete (LWAC) were introduced. In the application of structural LWAC, this paper emphasizes the design, manufacturing, construction and economic analysis for application of precast LWAC facade of Hong Kong. As the research deepens, structural LWAC has been gradually accepted by construction industry in Pearl River Delta. Experiment research and engineering practice has proved that the mechanical properties and durability of structural LWAC can completely meet the engineering requirements.

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Wang, Zhiheng, Xiaozhao Li, Nikolai Bobylev, Shuchen Li, and Jiangfeng Liu. "Coupling Coordination of “Urban Rail Transit—Social Economy” Composite System." Infrastructures 7, no. 4 (April 11, 2022): 56. http://dx.doi.org/10.3390/infrastructures7040056.

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The harmonious development of urban rail transit, underground space engineering, and social economy is the key to regional sustainable development. Based on synergetic theory, this paper constructs the coupling coordination evaluation system of “rail transport-social economy” composite system at the scale of a city cluster. With this system, the coupling and coordinated development pattern and characteristics of “rail transit-social economy” in the Yangtze River Delta city cluster from 2002 to 2020 were analyzed. The paper makes a horizontal comparison with the Beijing-Tianjin-Hebei city cluster and the Pearl River Delta city cluster, as well as analyzes the differences in development and existing problems, and puts forward policy suggestions for rail and urban underground space development. The results show that: (1) The rail transit of 11 cities in the Yangtze River Delta shows a “step by step” development pattern. That is “national central city, provincial city, second-tier city, third-tier city, etc.”, accompanied by periodic changes of coupling and coordination degree. In addition, there is also the phenomenon of unbalanced development within the region; (2) From 2002 to 2020, the development of rail transit in the three city clusters shows a situation of “the overall supply is lacking and lags behind the social economy for a long time”. Among them, the Pearl River Delta city cluster has the most serious lags. Multi-channel financing, speeding up the construction of the rail transit scale according to local conditions, and improving operating efficiency are considered to be the keys to solve this problem; (3) In general, the coupling between rail transit and the social economy in the Yangtze River Delta city cluster is better than that in the Beijing-Tianjin-Hebei city cluster and the Pearl River Delta city cluster, but the coordination is at a slight disadvantage.

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Tan, Chao, Ben Sheng Huang, Qing Shu Yang, and Jing Qiu. "Hydrodynamic Characteristics Change of the Pearl River Delta Channel Network in the Recent 50 Years." Advanced Materials Research 573-574 (October 2012): 415–20. http://dx.doi.org/10.4028/www.scientific.net/amr.573-574.415.

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The Pearl River delta channel network in the 1950s and 1990s is modeled and validated, and the hydrodynamic characteristic is analyzed during flood and drought at the same time. The study result shows that the model well simulates the real situation, which can be used for hydrodynamic characteristics analysis; There were obvious split ratio changes in the main branch in the late 50 years, the change degree of node in North River and near by is greater than West River’s. The waterlevel line of the West River main stream in the 1990s is generally lower than in the 1950s, especially the upstream of West River is more dramatic decline. River terrain changes caused by intensive human activities is the main reason why hydrodynamic force of the Pearl River Delta channel network district changed for the past 50 years.

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Ye, Qingyang, and Xinyu Cao. "Research on the Heterogeneity of Digital Economy Driving Regional Integration Development." International Journal of Education and Humanities 4, no. 3 (September 27, 2022): 187–91. http://dx.doi.org/10.54097/ijeh.v4i3.1804.

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Based on the panel data of 63 cities in China's Yangtze River Delta, Beijing Tianjin Hebei and Pearl River Delta urban agglomerations from 2011 to 2019, this paper measures the level of digital economy development and regional integration based on relevant theories and practical basis, and tests the impact of digital economy development on regional integration development and its heterogeneity in the three urban agglomerations, Finally, the following conclusions are drawn: ① The development level of digital economy has a significant positive impact on the development level of regional integration of urban agglomeration, that is, promoting the development of digital economy of urban agglomeration is conducive to the integrated development of urban agglomeration. ② There are significant differences in the impact of the digital economy development level of the three urban agglomerations on the regional integration development level of urban agglomerations, showing the phenomenon of Yangtze River Delta > Beijing Tianjin Hebei > Pearl River Delta. Finally, on this basis, the paper puts forward some suggestions on how to use digital economy to drive the development of regional integration.

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Zhang, Yu Cheng, Hai Ying Hu, and Zhong Ming Huang. "The Strength Calculation Method of Foundation Treated with Sand Well." Advanced Materials Research 919-921 (April 2014): 805–8. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.805.

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Due to the characteristics of the physical mechanical properties of soft ground, reasonable foundation treatments are usually necessary before it meets the need of foundation deformation and load requirements. How to choose a reasonable foundation treatment method which has obvious virtues of economical expenditure and shorter construction period is an urgent problem emerging in engineering construction in the Pearl River Delta. While drainage sand well is used widely in soft soil foundation treatment in the Pearl River Delta. In this paper, a simplified calculation method is proposed to calculate the strength of soft soil foundation treated by sand well after drainage consolidation.

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Li, Hui Hui Lisa, and Tsz Leung Yip. "Core Competences of River Ports: Case Study of Pearl River Delta." Asian Journal of Shipping and Logistics 32, no. 2 (June 2016): 99–105. http://dx.doi.org/10.1016/j.ajsl.2016.05.003.

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43

Fan, Xiaoyun, Baoshan Cui, and Zhiming Zhang. "Spatial variations of river water quality in Pearl River Delta, China." Frontiers of Earth Science 6, no. 3 (April 26, 2012): 291–96. http://dx.doi.org/10.1007/s11707-012-0295-1.

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44

Wei, He, Long Hua Gao, He Qin Chen, and Jiu Fa Li. "Study on Discharge Distribution Ratio Variation of Main Connection Nodes in Pearl River Delta, in Wet Season, China." Advanced Materials Research 347-353 (October 2011): 1883–86. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.1883.

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In recent years,with the high speed development of economy in Pearl River delta, infrastructure investment for water resource,traffic,environmental protection is growing.It is increasingly urgent for understanding river nets system and discharge distribution ratio variation of main connection nodes.Discharge distribution ratio of each nodes is relative to the runoff of upper boundary and the tidal power of lower boundary.The Pearl River estuary is divided into far mouth section,near mouth section and estuary section.Discharge distribution ratio of every section varieties with upper and lower boundary conditions.In this paper,Based on the observational data of June in 1998 and June in 2005,combining with history data,analysis discharge distribution ratio variation of main connection nodes of the Pearl River delta.and set up a mathematical model to simulate flow variation characters.The conclusion is, in recent years Discharge distribution ratio of the east four outlets increases, namely the ratio of West River flowing into North River and North River into the main channel of the Pearl River.with the flood discharge increasing,The ratio of the longitudinal branches occupies the smaller proportion than that of latitude branches.

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Gao, Yuan, Keyu Fan, Chao Wang, Yanyi Zeng, Haiyan Li, Yongzhan Mai, Qianfu Liu, and Zini Lai. "Abundance, Composition, and Potential Ecological Risks of Microplastics in Surface Water at Different Seasons in the Pearl River Delta, China." Water 14, no. 16 (August 18, 2022): 2545. http://dx.doi.org/10.3390/w14162545.

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In this study, microplastics in the surface water in the Pearl River Delta during different seasons were studied to analyze their temporal and spatial distribution, morphological characteristics, related socio-economic indicators, and potential ecological risks. Based on an analysis of surface water samples from 13 sampling sites, we found that the temporal and spatial distribution of microplastics in the Pearl River Delta were unbalanced. The microplastic abundances at the Qingqi, Chencun, Zuotan, and Beijiao sites were tremendously higher than those at other sites. Nevertheless, the abundance of microplastics at most sites was tremendously higher in the rainy season than dry season. Meanwhile, the morphological characteristics of microplastics had a strong correlation with the changes of season and site location. During the rainy season, the major color, shape, and size distribution of microplastics were gray (38.64%), strip (78.29%), and 100–500 μm (57.38%), respectively. The most usual color, shape, and size distribution of microplastics in the dry season were black (38.64%), granular (78.29%), and 0–100 μm (70.29%), respectively. As for the socio-economic indicators, including the degree of afforestation as well as the extent of industrial, transportation, and other human activities, all had varying degrees of impact on microplastic abundances. The potential ecological risk assessments demonstrated that most sites in the Pearl River Delta had a high potential for ecological risk related to microplastic pollution, which should be given more attention in the future. In summary, our investigations offer a theoretical basis for research related to microplastics in the Pearl River Delta and can further improve our understanding of the need to protect aquatic environments by exploring the overall ecological risks posed by microplastics.

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Sum, Ngai-Ling. "A cultural political economy of transnational knowledge brands." Discourse and Socio-Political Transformations in Contemporary China 9, no. 4 (December 31, 2010): 546–73. http://dx.doi.org/10.1075/jlp.9.4.05sum.

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This paper adopts a “cultural political economy” (CPE) approach to examine the production of hegemony and related hegemonic struggles during the socio-spatial changes occurring in the Pearl River Delta. Drawing from the case of Hong Kong/Pearl River Delta, economic restructuring has given rise to the “hollowing out” debate. In face of this debate, two knowledge brands, the Harvard-Porter’s “competitive advantage” (1985) and MIT-Berger-Lester’s “industrial performance” models, have been stabilized as competing modes of developmentality (development governmentality) and have operated as paper-based economic panopticons to order/manage, at a distance, the organization of Hong Kong’s/Pearl River Delta’s space, policy, and, ultimately, the conduct of its population. These modes of developmentalities have met resistance from other forces in other spaces and with other interests, including from below. Nonetheless the two main power blocs are engaging in inter-bloc negotiations in the light of such resistance and are creating a hybrid strategy under the dominance of the service bloc.

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47

Zhao, Kai, Huahua Huang, and Wanshu Wu. "Can the establishment of state-level urban agglomeration stimulate enterprise innovation?—Taking Yangtze River Delta and Pearl River Delta as an example." PLOS ONE 17, no. 8 (August 25, 2022): e0273154. http://dx.doi.org/10.1371/journal.pone.0273154.

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This study uses a quasi-experimental method, Geographic Regression Discontinuity Design (GRDD), to evaluate the actual effect of establishing Yangtze River Delta and Pearl River Delta urban agglomerations on enterprise innovation. GRDD is a design in which a geographic boundary splits the units into treated and control areas in an as-if random fashion, and the shortest distances from each enterprise’s location to the boundary of urban agglomeration calculated by ArcGIS are considered as the running variable. The actual effect can be identified by the probability of receiving treatment jumps discontinuously at the known cutoff. It is shown that the establishment of Yangtze River Delta and Pearl River Delta urban agglomerations can significantly improve the enterprise innovation, and this outcome is verified by rigorous robustness tests including the placebo test with pseudo-boundary, the bandwidth sensitivity test, the parametric test with different functional forms and the extreme value test. Further, the influence mechanisms of state-level urban agglomerations promoting enterprise innovation are explored by Staggered DID. It is confirmed that the urban agglomeration construction can promote enterprise innovation through financial support and regional coordination channels.

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Zhang, Hui, Jia Jia Zhao, Ai Min Song, and Ming Wei Song. "Health Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) in the Pearl River Delta." Applied Mechanics and Materials 260-261 (December 2012): 631–36. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.631.

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The objective of this study was to quantify PAHs exposure level for different resident groups and to estimate the incremental lifetime cancer risk for people in the Pearl River Delta. A multimedia/multipathway exposure model recommended by USEPA was employed in this study. Results indicated that the average cancer risk of exposure to PAH16 was 2.63×10-5 a-1 and the loss of life expectancy was 163.48 minutes. Considering the large amounts of PAHs emitted into the ambient environment in China and the loss of life expectancy, it is extremely important to take a preliminary health risk assessment of citizens exposed to PAHs in the Pearl River Delta.

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Guo, Hongxu, Zihan Xie, and Rong Wu. "Evaluating Green Innovation Efficiency and Its Socioeconomic Factors Using a Slack-Based Measure with Environmental Undesirable Outputs." International Journal of Environmental Research and Public Health 18, no. 24 (December 7, 2021): 12880. http://dx.doi.org/10.3390/ijerph182412880.

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Understanding green innovation efficiency (GIE) is crucial in assessing achievements of the current development strategy scientifically. Existing literature on measuring green innovation efficiency with considering environmental undesirable outputs at the city level is limited. Consulting existing studies, this paper constructs an evaluation index system to measure green innovation efficiency and its socioeconomic impact factors. Employing a super slacks-based measure (Super-SBM) model, which takes into account undesirable outputs (industrial wastewater emissions, industrial exhaust emissions and CO2 emissions), and a Global Malmquist–Luenberger index (GML), we calculate the green innovation efficiency of 15 cities in the Pearl River Delta (PRD) urban agglomeration from 2009 to 2017, exploring the impact factors behind green innovation efficiency using a Tobit panel regression model. The empirical results are as follows: Due to the heterogeneity of urban functional division and economic development in the Pearl River Delta, more than half of the region’s cities were found to be in ineffective or transitional states with respect to their green innovation efficiency. A GML decomposition index shows that technological efficiency and technological progress are out of step with one another in the Pearl River Delta, an asymmetry which is restricting regional green innovation growth. The influencing factors of industrial structure, the level of economic openness, and the urban informationization level are shown to have promoted green innovation efficiency in the Pearl River Delta’s cities, while government R&D expenditure and education expenditure exerted negative effects. This paper concludes by highlighting the importance of cooperation between the government and enterprises in achieving green innovation.

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Wang, Dayan, Lei Yang, Wenfei Zhu, Ye Zhang, Shumei Zou, Hong Bo, Rongbao Gao, et al. "Two Outbreak Sources of Influenza A (H7N9) Viruses Have Been Established in China." Journal of Virology 90, no. 12 (March 30, 2016): 5561–73. http://dx.doi.org/10.1128/jvi.03173-15.

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ABSTRACTDue to enzootic infections in poultry and persistent human infections in China, influenza A (H7N9) virus has remained a public health threat. The Yangtze River Delta region, which is located in eastern China, is well recognized as the original source for H7N9 outbreaks. Based on the evolutionary analysis of H7N9 viruses from all three outbreak waves since 2013, we identified the Pearl River Delta region as an additional H7N9 outbreak source. H7N9 viruses are repeatedly introduced from these two sources to the other areas, and the persistent circulation of H7N9 viruses occurs in poultry, causing continuous outbreak waves. Poultry movements may contribute to the geographic expansion of the virus. In addition, the AnH1 genotype, which was predominant during wave 1, was replaced by JS537, JS18828, and AnH1887 genotypes during waves 2 and 3. The establishment of a new source and the continuous evolution of the virus hamper the elimination of H7N9 viruses, thus posing a long-term threat of H7N9 infection in humans. Therefore, both surveillance of H7N9 viruses in humans and poultry and supervision of poultry movements should be strengthened.IMPORTANCESince its occurrence in humans in eastern China in spring 2013, the avian H7N9 viruses have been demonstrating the continuing pandemic threat posed by the current influenza ecosystem in China. As the viruses are silently circulated in poultry, with potentially severe outcomes in humans, H7N9 virus activity in humans in China is very important to understand. In this study, we identified a newly emerged H7N9 outbreak source in the Pearl River Delta region. Both sources in the Yangtze River Delta region and the Pearl River Delta region have been established and found to be responsible for the H7N9 outbreaks in mainland China.

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Journal articles on the topic 'Pearl River Delta'

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