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1
Ji, Zhengxin, Yueqing Xu, and Hejie Wei. "Identifying Dynamic Changes in Ecosystem Services Supply and Demand for Urban Sustainability: Insights from a Rapidly Urbanizing City in Central China." Sustainability 12, no. 8 (April 22, 2020): 3428. http://dx.doi.org/10.3390/su12083428.
Повний текст джерелаАнотація:
Identifying the balance and dynamic changes in supply and demand of ecosystem services (ES) can help maintain the sustainability of the regional ecosystem and improve human well-being. To achieve a sustainable ecological management regime in Zhengzhou City, this study presented a comprehensive framework for identifying dynamic changes of ES supply and demand and managing ES. Using land use data of Zhengzhou City in 1995, 2005, and 2015 and incorporating expert knowledge and the ES evaluation matrix, we evaluated the spatiotemporal changes in the ES supply and demand in Zhengzhou. Gradient analysis was conducted to identify urban–rural patterns in the budgets of ES supply and demand. Spatial autocorrelation analysis was employed to identify the hotspot areas of ES surpluses or deficits. The research results show the following: (1) In the past 20 years, the supply-and-demand relationship of ES in Zhengzhou has gradually evolved in a direction where supply falls short of demand. The average budget index of Zhengzhou’s ES supply and demand decreased from 7.30 in 1995 to −4.89 in 2015. Changes in the supply and demand status of ES in Zhengzhou corresponded to the background of rapid urbanization. (2) Urban–rural gradient differences exist in the budgets of ES supply and demand in Zhengzhou. Core development areas, such as the Zhengzhou urban areas, are in deficit, whereas a balance or surplus can be observed in rural areas far from urban centers. (3) The surplus hotspots of ES budgets were mainly distributed in the western and southern mountainous areas of Zhengzhou, and they were scattered and the scope shrank, with a decrease of 2.73 times in 20 years, whereas the deficit hotspots expanded outward with each urban area as the center, with an increase of 5.77%. Ecological management zoning (ecological conservation area, ecological improvement area, and ecological reconstruction area) with the effective guidance of ecological and economic policies could comprehensively improve ES management and achieve urban sustainability. The framework in this study can easily and quickly assess the supply and demand status of ES and provide scientific support for the ecological management in rapidly urbanizing areas.
2
Zhao, Mengdie, Jinhang Li, Jinliang Zhang, Yuping Han, and Runxiang Cao. "Research on Evaluation Method for Urban Water Circulation Health and Related Applications: A Case Study of Zhengzhou City, Henan Province." International Journal of Environmental Research and Public Health 19, no. 17 (August 24, 2022): 10552. http://dx.doi.org/10.3390/ijerph191710552.
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The acceleration of urbanization and climate change has increasingly impacted the health level of urban dual water cycles. In order to accurately evaluate the health status of urban water cycles, the evaluation system covers four standard layers of water ecology, water abundance, water quality and water use, including 19 basic indicators such as water storage change and annual average precipitation. Three-scale AHP and EFAST algorithms are adopted to set the criterion and index layer weights. Water-cycle health assessment models are based on the improved TOPSIS model. The model evaluated Zhengzhou’s water cycle health from 2011 to 2021. We compared the TOPSIS model and FCE method to ensure the scientific objectivity of the evaluation results. The evaluation results indicated that the water cycle in Zhengzhou City improved annually, and the relative progress in 2020 was 0.567 in a sub-health state. The eco-environmental water demand, green coverage rate of the built district, water resources amount, and industry’s water consumption per unit of value added (CNY 10,000) were the major obstacles. These four factors have preponderantly influenced Zhengzhou City’s water cycle health. Our research results provide scientific reference for Zhengzhou to achieve a healthy urban water cycle and regional sustainable development.
3
Wang, Nan, and Shenghui Li. "Evaluation of Sustainability of Zhengzhou’s Land Use." Journal of Sustainable Development 10, no. 6 (November 29, 2017): 214. http://dx.doi.org/10.5539/jsd.v10n6p214.
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Land is not only a major space for human production and living, but also one of the most precious resources to humans. As a space carrier of urban construction, urban land resources constitute the part with the highest asset benefit among land resources, offering an essential space for economic reproduction, population reproduction and environment reproduction in urban areas. To sum up, urban land resources are the material basis, guaranteeing sustainability of urban development.In this paper, changes of sustainability of land use in Zhengzhou City, Henan Province from 2011 to 2015 were analyzed so as to evaluate sustainability level of land use in Zhengzhou. Based on correlation analysis, resource, environment, economy and society were selected as four evaluation indexes, and their weights were determined. Then, the method of maximum was used to realize data normalization, and the comprehensive index value was computed. Finally, sustainability of Zhengzhou’s land use was comprehensively evaluated. Taken as a whole, sustainability of Zhengzhou’s land use was improving from 2011 to 2015, but the comprehensive sustainability level was still low, calling for further strengthening. From 2014 to 2015, the sustainability level of land use was still on the downward.
4
Lv, Xue Liang, Jin Zhang Qiu, Liang Ming Hu, Jin Ping Zhang, and Bin Zhang. "Research on Water Conservation of Zhengzhou City Center in 12th Five-Year." Applied Mechanics and Materials 501-504 (January 2014): 1951–55. http://dx.doi.org/10.4028/www.scientific.net/amm.501-504.1951.
Повний текст джерелаАнотація:
On the basis of comprehensive analysis of water supply and the development of social economy in Zhengzhou, analysis of the balance of supply and demand of water resources and water-saving potential in Zhengzhou center city, and identified the water conservation planning target of Zhengzhou City center in 2015, it is concluded that water-saving potential in Zhengzhou City center in 2015 is 3000.28×104 m3; and put forward the countermeasures and measures of saving water from the aspects of industry and comprehensive life, for the water conservation planning of Zhengzhou City center in 12th Five-year to provide the reference basis.
5
Wang, Qizhen, Tong Zhao, Rong Wang, and Ling Zhang. "Backward Trajectory and Multifractal Analysis of Air Pollution in Zhengzhou Region of China." Mathematical Problems in Engineering 2022 (January 13, 2022): 1–17. http://dx.doi.org/10.1155/2022/2226565.
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With the continuous promotion of industrialization and urbanization, China's environmental pollution is becoming increasingly serious, which has caused considerable damage to the natural balance. Air pollution seriously harms people's physical and mental health, the ecological environment, and the social sustainable development of society. In this study, the backward trajectory model and multifractal methods were adopted to analyze air pollution in Zhengzhou. The backward trajectory analysis showed that most clusters of air pollution were from southern Hebei, eastern Shandong, and mid-western Henan, which were then transported to Zhengzhou. For the PSCF and CWT analyses, we selected four representative cities to explore how close the air pollution of Zhengzhou is to other areas on the basis of air polluted concentration. The results of several multifractal methods indicated that multifractality existed in the AQI time series of Zhengzhou and cross-correlations between Zhengzhou and each of the four cities. The widths of multifractal spectra showed that the air pollution in Zhengzhou was closest to that in Jinan, followed by Shijiazhuang, Zibo, and Luoyang. The CDFA analysis showed that carbon monoxide (CO), nitrogen dioxide (NO2), and inhalable particulate matter (PM10) had important influences on air pollution in Zhengzhou. These findings offer a useful reference for air pollution sources and their potential contributions in Zhengzhou, which can support policy makers in environmental governance and in achieving sustainable urban development.
6
Hao, Mengge, Dongyong Zhang, and Stephen Morse. "Waste Separation Behaviour of College Students under a Mandatory Policy in China: A Case Study of Zhengzhou City." International Journal of Environmental Research and Public Health 17, no. 21 (November 5, 2020): 8190. http://dx.doi.org/10.3390/ijerph17218190.
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The need for effective solid waste management (SWM) is an important environmental and public health issue. As a key way of minimizing municipal solid waste (MSW), source separation has in recent years become the centre of discussion in China. Following the example of Shanghai, the city of Zhengzhou introduced its mandatory waste separation measures on 1 December 2019. But does the mandatory regulation work? This study aims to investigate the waste separation behaviour of college students in Zhengzhou under the mandatory regulation and the motivations behind students’ behaviour. A questionnaire-based survey was carried out on 62 university campuses in Zhengzhou City, and a total of 1747 valid questionnaires were completed across these campuses and analysed. It was found that under Zhengzhou’s mandatory measures, college students do have a basic knowledge of waste separation and most are familiar with where kitchen waste should be placed, but they have problems categorizing some recyclables such as glass, hazardous waste such as lightbulbs and other waste such as cigarette butts and napkins. It was also found that college students’ waste separation behaviour, their attitude towards waste separation and the convenience of waste sorting facilities in Zhengzhou in the mandatory era have been improved compared to the era prior to mandatory waste separation. The results also indicate that most of college students (86.7%) always or sometimes undertake waste separation, and students majoring in science and senior year undergraduates are more likely to participate in the practice of waste separation. Other influencing factors of college students’ waste separation behaviour include convenience of waste sorting facilities, their willingness to separate waste, knowledge of a related field, attitude towards waste separation, peer pressure as well as the existence of a reward and penalty system. Management strategies for improving college students’ waste separation behaviour under mandatory regulation are also discusses and a number of recommendations for improvement are made.
7
Liu, Ruiliang, A. Mark Pollard, Jessica Rawson, Xiaojia Tang, Peter Bray, and Changping Zhang. "Panlongcheng, Zhengzhou and the Movement of Metal in Early Bronze Age China." Journal of World Prehistory 32, no. 4 (November 27, 2019): 393–428. http://dx.doi.org/10.1007/s10963-019-09137-w.
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AbstractThe role of Panlongcheng—a walled settlement on the Yangtze River with obvious links to the Erligang capital at Zhengzhou, ~ 500 km to the north—in early Bronze Age China has been the subject of much debate. Panlongcheng is a typical Erligang site (~ 1500–1300 BC), with evidence for people of elite status, unlike any other site apart from Zhengzhou itself. The tombs and bronzes at Panlongcheng, as well as other materials, closely resemble those at Zhengzhou. Why was Panlongcheng established along the Yangtze River, and what were the Erligang elites doing there? Considering the rich copper deposits in this area, it is widely assumed that the major function of Panlongcheng was to ship metal to Zhengzhou, and in return to receive bronze vessels from Zhengzhou. The purpose of this paper is to revisit this discussion through a re-evaluation of the scientific data on the bronzes from each site. A series of differences and similarities in the chemical and isotopic compositions of the metal objects at Panlongcheng and Zhengzhou are identified, suggesting that the relationship was more complex than was previously thought. In this light, despite a close social and presumably political affiliation with Zhengzhou, Panlongcheng appears likely to have had its own metal-casting capability, rather than having to rely completely on finished objects imported from Zhengzhou. This discovery encourages scholars to re-consider the metal supply network and the underlying political landscape in early dynastic China, shifting from a linear model to a complex but probably more realistic one.
8
Liu, Chang, Yongge Hu, Assemgul Taukenova, Guohang Tian, and Bo Mu. "Identification of Wetland Conservation Gaps in Rapidly Urbanizing Areas: A Case Study in Zhengzhou, China." Land 12, no. 1 (January 10, 2023): 221. http://dx.doi.org/10.3390/land12010221.
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Exploring protected area (PA) siting from a biodiversity perspective is critical in mitigating human impacts on ecosystems. This paper used the MaxEnt model to predict the geographic distribution patterns of wetland species in Zhengzhou and the environmental factors affecting species’ habitat selection. Environmental variables were screened by correlation analysis to avoid affecting the prediction results due to overfitting of the model. The AUC value of the training set of the model ROC curve was above 0.8, and the prediction accuracy was high. The prediction results showed that the only nature reserve in Zhengzhou, Yellow River Wetland Nature Reserve, currently covers only 10.25% of the total area of the high suitability areas for plants and 17.54% of the high suitability habitat areas for waterfowl in the whole area of Zhengzhou. The potential suitability areas of wetland species outside the reserve can provide a basis for site selection for wetland conservation planning in Zhengzhou. It was found that the geographic distribution of wetland species in Zhengzhou is constrained by the distribution of water bodies, bioclimatic variables, land cover, and population density.
9
Wen, Yi, and Xin Wang. "New Ways of City Tourism Industry Clusters Construction – A Case of Construction of Zhengzhou City Travel Hub." Applied Mechanics and Materials 438-439 (October 2013): 1843–45. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.1843.
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From the overall urban development strategy, breaking through the traditional concept of urban tourism distribution center construction and using the new scenery spot operating model to build Zhengzhou city tourism industrial clustering region not only can make up for the citys lack of a tourism distribution center, but also is beneficial for the new districts overall development and construction in west Zhengzhou city, thus to promote the adjustment and optimization of industrial structure and spatial structure in Zhengzhou city.
10
Zhao, Xiuyan, and Changhong Miao. "Spatial-Temporal Changes and Simulation of Land Use in Metropolitan Areas: A Case of the Zhengzhou Metropolitan Area, China." International Journal of Environmental Research and Public Health 19, no. 21 (October 28, 2022): 14089. http://dx.doi.org/10.3390/ijerph192114089.
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Metropolitan areas are the main spatial units sustaining development. Investigating internal factor changes in metropolitan areas are of great significance for improving the quality of development in these areas. As an emerging national central city of China, Zhengzhou has experienced rapid urban expansion and urbanization. In this study, principal component analysis and the model and Geodetector model were used to comprehensively analyze the influencing factors of land use change in Zhengzhou from 1980 to 2015. Based on the CA–Markov model, we improved the accuracy of multi-criteria evaluation of suitability factors and simulated land use change in 2015. The results show that land use conversions in the study area between 1980 and 2015 were frequent, with the areas of farmland, woodland, grassland, water, and unused land decreasing by 5.00%, 17.12%, 21.59%, 18.31%, and 94.48%, respectively, while construction land increased by 53.61%. The key influences on land use change are the urbanization and growth of residential or non-agricultural populations. In 2035, the area of farmland in the study area will decrease by 11.09% compared with that in 2015 and construction land will increase by 38.94%, while the area of other land use types will not significantly change. Zhengzhou, as the center city, forms a diamond-shaped core development area of Zhengzhou–Kaifeng–Xinxiang–Jiaozuo, while Xuchang is considered an independent sub-center uniting the surrounding cities for expansion. With its radiation power of unipolar core development for many years and the developmental momentum of Zhengzhou–Kaifeng integration, Zhengzhou city jointly drives the economic development of the surrounding cities. The protection of farmland and control of the expansion of construction land are the major challenges for the Zhengzhou metropolitan area to achieve sustainable development.
11
Cao, Wujun, and Lulu Wan. "Zhengzhou Distribution Research and Countermeasures." MATEC Web of Conferences 100 (2017): 05055. http://dx.doi.org/10.1051/matecconf/201710005055.
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12
Li, Xiu Xia. "Eco-Environmental Construction in Zhengzhou." Advanced Materials Research 989-994 (July 2014): 1232–35. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1232.
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After a discussion of present problems of eco-environmental construction on municipal virescence , water environment and water ecology, and landscape as well as urban ecological system of quantity, quality and capacity in Zhengzhou, the causes of these problems are analyzed. Measures are put forward, such as knowing the meaning of municipal eco-environmental construction, increasing the environmental protect consciousness of managers and enhancing the municipal eco-systemic construction.
13
Yang, Yang, Ruizhen He, Dongge Ning, Guifang Wang, Manshu Liu, and Albert Fekete. "An Overview of Urban Park Development in Zhengzhou, China." Acta Biologica Marisiensis 4, no. 2 (December 1, 2021): 1–13. http://dx.doi.org/10.2478/abmj-2021-0009.
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Abstract As essential elements of green spaces and social spaces in cities, urban parks significantly improve the quality of life and promote urban sustainability. Research on the development process of urban parks can be meaningful for coping with the current issues and future opportunities facing cities. This study takes Zhengzhou as the case aiming to outline the development process and characteristics of urban parks within the city. We adopted the empirical analysis to review the evolution processes and trends of Zhengzhou’s urban parks from the perspective of implementation approaches, spatial layout, and functions and uses. Results reveal four subsequent phases: the emergence phase (1949–1977), the growth phase (1978–1996), the acceleration phase (1997–2012), and the promotion phase (after 2012), according to the periods of urban development and the opportunities for green space development. The discussion includes development issues and strategies regarding land use approaches, user group needs, and public participation. The findings may help formulate adaptive and effective policies and planning tools for urban parks and provide a basis for further research on urban parks and Zhengzhou’s road to the ideal “Park City”.
14
Tuo, Wei, Xianqi Zhang, Chao Song, Dengkui Hu, and Tianyi Liang. "Annual precipitation analysis and forecasting – taking Zhengzhou as an example." Water Supply 20, no. 5 (April 20, 2020): 1604–16. http://dx.doi.org/10.2166/ws.2020.067.
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Abstract Precipitation is greatly affected by natural conditions and human activities, and its sequence has the characteristics of periodic variation and non-stationarity. In order to study the periodic characteristics of regional precipitation, reduce the non-stationarity of the water sequence and improve the forecasting accuracy, the Morlet wavelet model and CEEMD − Elman + ARIMA model are introduced, and applied to the precipitation sequence of Zhengzhou. The results show that the annual precipitation in Zhengzhou is mainly affected by periodic fluctuations of 55a, 40a and 15a, and the mean absolute error of the CEEMD − Elman + ARIMA model in 2013–2017 is 14.1%. Based on the analysis of precipitation period and forecast of future precipitation, the characteristics and evolution of precipitation in Zhengzhou are revealed. This provides a theoretical basis for rational utilization of water resources, prevention, industrial and agricultural production in Zhengzhou.
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Li, Xiu Xia. "Urban Ecological Environmental Quality Evaluation System Research." Advanced Materials Research 989-994 (July 2014): 1228–31. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.1228.
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The paper extracts the urban ecological environmental quality evaluation index, based on hierarchical analysis model, the integrated use of "pressure-state-response" model, through the frequency statistics method, factor comparison method and expert evaluation method and so on to set up urban ecological environmental quality evaluation system in nearly a decade based on the related data of environment quality evaluation of Zhengzhou city. Results show that from 1998 to 1998, Zhengzhou ecological environmental quality rises year by year, the ecological environment on the basis of good for Zhengzhou city ecological security evaluation and management.
16
Yu, Xiao Peng, Bo Zhang, Jun Zhong Yang, Shuang Yin Dai, and Zhi Qiang Dai. "Considering Load Characteristics Harmonic Penetration in Zhengzhou Converter Station Nearly." Advanced Materials Research 889-890 (February 2014): 425–28. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.425.
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This paper presents the rules of harmonic penetration in Zhengzhou harmonic voltage level. National standards limit the harmonic voltage distortion level in the buses, so study the UHV AC/DC hybrid system is significant to power grid. In order to find out the harmonic voltage level near Zhengzhou converter station, a method has been proposed in this paper, including the models of radiation power grid, load characteristics and converter station's AC filter. Finally, according to Zhengzhou converter station power frame sets up a detail model in the simulation software packages PSCAD/EMTDC to study the law of harmonic penetration.
17
Lu, You, Yan Fang Liu, Zhi Wang, and Xiao Xiao. "Zhengzhou City Image and Symbolization — The Effect of Culture - Shaolin Temple." Applied Mechanics and Materials 174-177 (May 2012): 1895–98. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.1895.
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City image symbol as a city development of soft power, its symbolic connotations become the core information of city transmission, which is the city's cultural precipitation accumulation in miniature..City symbol not only as a visual symbol, and the special symbol image accelerate city comprehensive development, displays a full cultural connotation. This article from the Shaolin Temple culture and influence in the world, talking about the Shaolin Temple to the ancient city of Zhengzhou the influence of image symbols. The" Central Plains " Zhengzhou brand image, in the legendary" The first ancient temples" light, while adding commercial breath making the Shang cultural icons of Zhengzhou spread and establish brand effect.
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Wu, Zhengwang, and Jingyi Ye. "Research on public perception and participation in the relic park——taking Zhengzhou Shang Dynasty city wall relic park as example." E3S Web of Conferences 165 (2020): 04058. http://dx.doi.org/10.1051/e3sconf/202016504058.
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The city wall relic park in Zhengzhou is a city park built on the Shang Dynasty city Wall site. As Zhengzhou is chosen as the eighth ancient capital of China, it is gradually recognized by the public. However, due to the lack of protection, development and utilization of the site, the historical value and cultural value of the Shang Dynasty Wall in Zhengzhou have not been fully shown. The construction of the city wall relic park is related to the soft inheritance and protection of the historical heritage. The spiritual inheritance of the historical heritage mainly depends on the spiritual transmission of the public. The public has the most direct feeling and understanding of it, so it is necessary to introduce public participation. In this paper, the scientific evaluation method Post Occupancy Evaluation (POE) is used to discuss the problem found by the public when using the city wall space. Suggestions and public participation strategies are given on the construction of the city wall relic park. We need to think about if there is public participation in the site now and how to let the public participate in planning, construction and management of the relic park. In order to make the city wall become the city’s leisure living room, to build the brand of Zhengzhou, and make it famous across the whole country, it’s urgent to put forward countermeasures for the development problem of Zhengzhou.
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Han, Han, Huimin Li, and Kaize Zhang. "Urban Water Ecosystem Health Evaluation Based on the Improved Fuzzy Matter-Element Extension Assessment Model: Case Study from Zhengzhou City, China." Mathematical Problems in Engineering 2019 (January 29, 2019): 1–14. http://dx.doi.org/10.1155/2019/7502342.
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The urban water ecosystem is a core foundation for the urban construction of ecological civilization. Ecosystem health is directly related to the economic development of the region and the quality of urban residents’ lives. Evaluating the health state of an urban water ecosystem is an important prerequisite for the construction of an ecologically civilized city. This study used Zhengzhou City in China as research area. Firstly, a Pressure-State-Response (PSR) model was used to construct an urban water ecosystem evaluation index system. Secondly, after analyzing the deficiency of traditional fuzzy matter-element extension model in urban water ecosystem health assessment, an improved fuzzy matter-element extension assessment model (FMEAM) was constructed by introducing the variable weight theory. Finally, using the proposed model above and the data from 2007 to 2016, this study evaluated the water ecosystem health status of Zhengzhou based on water ecosystem health integrated index (WHI). The results showed that the state of the urban water ecosystem in Zhengzhou generally improved during the study period. However, the overall level still remained low and retained an unhealthy state throughout the timeframe. The pressure on the Zhengzhou water ecosystem mainly originates from the increasing urbanization rate, the increased consumption of ecological environmental resources, and household water. Corresponding countermeasures in Zhengzhou have achieved certain results, and the health of the state’s subsystem and response subsystem has improved. However, it remains necessary to further strengthen the protection of the ecological environment, particularly with respect to water resources.
20
Chang, Zheng, Hai Pao Zhu, and Xing Chen Zhang. "The Integrated Automation Solutions Research of Zhengzhou North Station." Applied Mechanics and Materials 596 (July 2014): 636–39. http://dx.doi.org/10.4028/www.scientific.net/amm.596.636.
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This paper compares two kinds of Marshalling station integrated automation systems: SAM and CIPS, combining with the practical condition of Zhengzhou north station, analyzing from various angles such as safety and efficiency, finally choose the appropriate solution. In doing this, it will help to provide a strong support for the safe production and efficient transportation of Zhengzhou North Station.
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Ramondetti, Leonardo. "Zhengzhou. Il potenziamento della metropoli interna." TERRITORIO, no. 85 (September 2018): 51–56. http://dx.doi.org/10.3280/tr2018-085006.
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Liu, Xiaoyin. "Comparing the Views on Problem-Based Learning from Medical Education Students in Zhengzhou University in China and the University of Bristol in the UK." International Education Studies 14, no. 1 (December 26, 2020): 28. http://dx.doi.org/10.5539/ies.v14n1p28.
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Problem-based learning (PBL), as a student-centred learning method, refers to students actively participating in a group scenario to solve open-end problems. This study aims to compare the students’ attitudes on PBL in Zhengzhou University and the University of Bristol. This study adopts qualitative methods. By conducting semi-structured interviews with eight participants, four from Zhengzhou University and the others from the University of Bristol. Overall, the results of the study indicated that students from both two universities are overall satisfied with PBL because of its contribution to deeper understanding of medical knowledge and skill development and they all think that the quality of group discussion and the efficiency of PBL classes need to be improved. In terms of the different views from two universities, when it comes to the biggest benefit of PBL, students from Zhengzhou University are more likely to choose clinical thinking, while students from the University of Bristol are more satisfied with the deep understanding on medical knowledge. Unexpectedly, although Zhengzhou University has implemented PBL for fewer years than the University of Bristol, students are more satisfied with and motivated in PBL classes than those of the University of Bristol.
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Li, Siyi, Guowang Jin, and Jiahao Li. "Monitoring of “7-20” Rainstorm Damage in the Zhengzhou Road Network Using Heterogeneous SAR Images." Applied Sciences 13, no. 2 (January 13, 2023): 1103. http://dx.doi.org/10.3390/app13021103.
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Flooding is one of the most frequently occurring meteorological disasters nowadays, and its occurrence can cause significant socio-economic losses. Aiming at the problem that traditional optical remote sensing makes it difficult to monitor floods, this paper designs a scheme to jointly extract the scope of the affected area by using heterogeneous satellite-based SAR images acquired at different times within the flood period. This paper takes the “7-20” rainstorm in Zhengzhou City as an example and uses two kinds of heterogeneous SAR images, Sentinel-1A and GF-3, to extract the flooding damage in the main urban area. In addition, combinations with the vector data of the Gaode road network were performed to further monitor and analyze the “7-20” rainstorm damage in the main urban area of Zhengzhou. The results showed that the main urban area of Zhengzhou City was affected by the “7-20” rainstorm. The roads in the main urban area of Zhengzhou were seriously affected, and the total length of the affected roads reached 1324.63 km. The monitoring scheme for flooding road network damage using Sentinel-1A and GF-3 heterogeneous SAR images has certain feasibility.
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Li, Bowei, Steven Sai Hang Ho, Sunling Gong, Jingwei Ni, Huairui Li, Liyan Han, Yi Yang, Yijin Qi, and Dongxu Zhao. "Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods." Atmospheric Chemistry and Physics 19, no. 1 (January 16, 2019): 617–38. http://dx.doi.org/10.5194/acp-19-617-2019.
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Abstract. A 5-month campaign (from May to September 2017) was conducted to characterize volatile organic compounds (VOCs) for the first time at four sites in Zhengzhou, Henan Province, China, where ground level ozone (O3) concentration has shown an increasing trend in recent years. Canister samples were collected for the measurement of 57 VOCs, which, along with reactive nitrogen oxides (NOx), are the most important O3 precursors. During the same period, O3 and its precursor gases were monitored online simultaneously. The results indicated that the average mixing ratio of total quantified VOCs (ΣVOCs=28.8±22.1 ppbv) in Zhengzhou was lower than that in the other Chinese megacities, while alkyne comprised a higher proportion of ΣVOCs. The abundances, compositions and ratios of typical VOCs showed clear spatial and temporal variations. Cluster analysis indicates that air masses from the south of Zhengzhou were cleaner than from other directions. The molar ratio of VOCs to NOx indicated that, in general, O3 formation was more sensitive to VOCs than NOx formation in Zhengzhou. The source apportionment was conducted with positive matrix factorization (PMF), and it was found that vehicle exhaust, coal and biomass burning and solvent usage were the major sources for ambient VOCs at all four sites. From potential source contribution function (PSCF) analysis, the strong emissions from coal + biomass burning and solvent usage were concentrated in the southwest of Shanxi and Henan provinces. This study gathers scientific evidence on the pollution sources for Zhengzhou, benefiting the government to establish efficient environmental control measures, particularly for O3 pollution.
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Walton, Linda. "The “Spirit” of Confucian Education in Contemporary China: Songyang Academy and Zhengzhou University." Modern China 44, no. 3 (December 13, 2017): 313–42. http://dx.doi.org/10.1177/0097700417744165.
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The recent reincarnation of Songyang Academy, one of the “Four Great Academies” of the Northern Song dynasty, is an example of “academy fever” 书院热 in China today. Along with nearby Shaolin Temple, the academy has become a site for cultural heritage tourism in northwestern Henan. In addition to its attraction as a tourist destination, however, Songyang Academy has also been appropriated by neighboring Zhengzhou University as an auxiliary Confucian campus. Focusing on its relationship with Zhengzhou University, this article considers Songyang Academy’s restoration in the context of current debates in China about modern university education, Confucianism, and “national studies” ( guoxue 国学). The Zhengzhou University–Songyang Academy partnership provides a concrete, if ambivalent, example of cultural governance in action, as provincial Communist Party officials and university administrators collaborate to produce a national studies curriculum rooted in their vision of Confucian pedagogy.
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Yang, Z., and Q. Wang. "MINING METHOD OF TRAFFIC IMPACT AREAS OF RAINSTORM EVENT BASED ON SOCIAL MEDIA IN ZHENGZHOU CITY." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-3/W1-2022 (October 27, 2022): 79–86. http://dx.doi.org/10.5194/isprs-archives-xlviii-3-w1-2022-79-2022.
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Abstract. Due to the influence of typhoon "fireworks" on July 20, 2021, there was a rare heavy rainfall in Zhengzhou, Henan Province, China, which caused severe urban waterlogged disasters and casualties. Take it as an example, using Web Crawler technology to obtain Weibo’s (Chinese Twitter) time and space data involved in the rare heavy rainfall in Zhengzhou. Through statistical analysis and spatiotemporal analysis to filter, classify, analyse and manipulate the crawled Weibo’s data, and then study the influence of the extreme rainstorm weather on the traffic areas from two aspects of address points and road networks. At the same time, to verify the effectiveness of the social media-based method for mining the traffic impact areas of the Zhengzhou extreme rainstorm, this experiment compares Weibo data with official data in various aspects according to four categories of waterlogging severity.
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Liu, Xun, Peng Zhou, Yichen Lin, Siwei Sun, Hailu Zhang, Wanqing Xu, and Sangdi Yang. "Influencing Factors and Risk Assessment of Precipitation-Induced Flooding in Zhengzhou, China, Based on Random Forest and XGBoost Algorithms." International Journal of Environmental Research and Public Health 19, no. 24 (December 9, 2022): 16544. http://dx.doi.org/10.3390/ijerph192416544.
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Due to extreme weather phenomena, precipitation-induced flooding has become a frequent, widespread, and destructive natural disaster. Risk assessments of flooding have thus become a popular area of research. In this study, we studied the severe precipitation-induced flooding that occurred in Zhengzhou, Henan Province, China, in July 2021. We identified 16 basic indicators, and the random forest algorithm was used to determine the contribution of each indicator to the Zhengzhou flood. We then optimised the selected indicators and introduced the XGBoost algorithm to construct a risk index assessment model of precipitation-induced flooding. Our results identified four primary indicators for precipitation-induced flooding in the study area: total rainfall for three consecutive days, extreme daily rainfall, vegetation cover, and the river system. The Zhengzhou storm and flood risk evaluation model was constructed from 12 indicators: elevation, slope, water system index, extreme daily rainfall, total rainfall for three consecutive days, night-time light brightness, land-use type, proportion of arable land area, gross regional product, proportion of elderly population, vegetation cover, and medical rescue capacity. After streamlining the bottom four indicators in terms of contribution rate, it had the best performance, with an accuracy rate reaching 91.3%. Very high-risk and high-risk areas accounted for 11.46% and 27.50% of the total area of Zhengzhou, respectively, and their distribution was more significantly influenced by the extent of heavy rainfall, direction of river systems, and land types; the medium-risk area was the largest, accounting for 33.96% of the total area; the second-lowest-risk and low-risk areas together accounted for 27.09%. The areas with the highest risk of heavy rainfall and flooding in Zhengzhou were in the Erqi, Guanchenghui, Jinshui, Zhongyuan, and Huizi Districts and the western part of Xinmi City; these areas should be given priority attention during disaster monitoring and early warning and risk prevention and control.
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Zheng, Hui-Fan, Yin-Long Chen, Xiao-Wei Fan, and Guo-Ji Tian. "A heat pipe solar collector system for winter heating in Zhengzhou city, China." Thermal Science 21, no. 4 (2017): 1771–76. http://dx.doi.org/10.2298/tsci151229067z.
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A heat pipe solar collector system for winter heating is investigated both experimentally and theoretically. The hourly heat collecting capacity, water temperature and contribution rate of solar collector system based on Zhengzhou city typical sunshine are calculated. The study reveals that the heat collecting capacity and water temperature increases initially and then decreases, and the solar collector system can provide from 40% to 78% heating load for a 200 m2 villa with in Zhengzhou city from November to March.
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Jia, Yizhen, and Han Wang. "Study on Water Resource Carrying Capacity of Zhengzhou City Based on DPSIR Model." International Journal of Environmental Research and Public Health 20, no. 2 (January 12, 2023): 1394. http://dx.doi.org/10.3390/ijerph20021394.
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Based on the driving force–pressure–state–impact–response (DPSIR) model, a comprehensive evaluation index system is constructed. The index weight is determined by the combination weighting method in combination with the data of 2010–2019. The TOPSIS model is used to comprehensively analyze the water resource carrying capacity of Zhengzhou as the central city in China with a developed economy and relatively short water resources. The study results are as follows. (1) During the sample period, the comprehensive evaluation value of water resources carrying capacity of Zhengzhou increases from 0.4183 in 2010 to 0.5560 in 2019, with an overall fluctuating rise. Simultaneously, the water resource carrying capacity grade improves from Grade III (normal carrying capacity) to Grade II (good carrying capacity). (2) The contribution of each subsystem to the comprehensive evaluation value increases year by year. Among them, S subsystem and I subsystem make the largest contribution to the comprehensive carrying capacity. R subsystem makes a relatively stable contribution to the overall carrying capacity. Affected by GDP growth rate and uneven temporal–spatial distribution of water resources in Zhengzhou, the D subsystem and P subsystem of water resource carrying capacities show the fluctuating change. Finally, based on the above conclusions, this paper puts forward the countermeasures and suggestions to improve the level of water resource carrying capacity of Zhengzhou.
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Wang, Jing, Wei Su, and Cheng Cai Liu. "Analysis on the Present Condition of Typical Buildings in Urban Villages in Zhengzhou." Advanced Materials Research 598 (November 2012): 211–14. http://dx.doi.org/10.4028/www.scientific.net/amr.598.211.
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The safety survey on the urban village buildings in Zhengzhou shows that many reasons have caused the hidden dangers in the safety and reliability of the urban village buildings. Based on our survey data, this paper aims at providing theoretical references for the remolding and reinforcement of the urban village buildings and the future construction of the New Village in China, with an appraisement and an mastery on the safety and reliability of the typical buildings in urban villages in Zhengzhou.
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Sha Zhan. "ANALYSIS OF GROUNDWATER QUALITY USING FUZZY SYNTHESIS EVALUATION." Diyala Journal of Engineering Sciences 2, no. 2 (December 1, 2009): 105–12. http://dx.doi.org/10.24237/djes.2009.02208.
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Thriving of the society in Zhengzhou city and development of its economy needs scientific and practical solutions of two main problems; natural water shortage and pollution. It is essential to assess the groundwater quality in order to confirm public safety in Zhengzhou and to reduce contamination in there. Fuzzy Synthetic evaluation was applied to delineate the extent of groundwater contamination in Zhengzhou. Assessment of shallow groundwater results concluded that the first three grades of Chinese water quality standards are 91%, whereas the fourth and fifth grades constitute 9% of it. For the deep water quality, the first two grades are 94% and 6%. It is deduced that part of the shallow groundwater quality is effectively contaminated. Contamination disappears going downward into the deep water. Cluster analysis show exactly same deduction. Fuzzy synthetic evaluation results (using Geographic Information System) were employed to assess the groundwater flow direction around the surveyed wells. It is concluded that infiltration of upstream industrial groundwater is probable into the deep confined groundwater
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Li, Ya Li, and Yao Chen Qin. "Study on Dynamic Change of Carbon Emission in Zhengzhou." Applied Mechanics and Materials 291-294 (February 2013): 1353–58. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1353.
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In order to explore the impact of the fossil energy consumption,industrial production and population on regional carbon cycle , this paper estimated the dynamic changes of carbon emissions from 2000 to 2009 in Zhengzhou based on the quantitative emission model proposed by IPCC and ORNL. The results show that the total carbon emissions in Zhengzhou was 48944.2 ×104t during 2000~ 2009, among which 83.3% came from fossil fuel combustion,7.7% from industrial production process and 9% came from population. The carbon emissions of fossil energy consumption and industrial production increases gradually.The carbon emission of coal was the highest among all kinds of fossil fuels,occupying 97.1% of the total emission of fossil fuel consumption. The carbon emissions increase progressively and surpass the national average level from 2000 to 2009 in China. And the carbon emissions for 100 million yuan GDP is increasing.Finally, some measures are proposed for the carbon emission reduction in Zhengzhou
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Fan, Qindong, Xuejian Mei, Chenming Zhang, and Xiaoyu Yang. "Research on Gridding of Urban Spatial Form Based on Fractal Theory." ISPRS International Journal of Geo-Information 11, no. 12 (December 13, 2022): 622. http://dx.doi.org/10.3390/ijgi11120622.
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Urban spatial form is a significant reference to getting to know cities and running the cities. The fractal theory is an effective means to quantify urban spatial form. Taking the buildings in the outer ring of Zhengzhou City as the research object, the basic architectural models are built by extracting their forms. The research site is subdivided into 199 regions. The distribution of architectural forms in Zhengzhou is analyzed by fractal theory and spatial autocorrelation from the perspective of two-dimensional(2D) and three-dimensional(3D). The results indicate that the architectural layout of Zhengzhou has distinct fractal characteristics; Both global spatial autocorrelation and local spatial autocorrelation show significant positive correlations; There are obvious spatial differences in architectural space forms in different regions. The refined grid analysis strengthens the understanding of the urban spatial structure and development rules in more detail. The study promotes the refinement and visualization of fractal theory effectively and improves the depth of urban spatial form cognition.
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Gong, Ruishan, and Naif R. Alrehaili. "Flood Preparedness in United Kingdom and China: A Comparison Study Focusing on Social and Economic Factors." International Journal of Disaster Management 5, no. 3 (February 27, 2023): 181–92. http://dx.doi.org/10.24815/ijdm.v5i3.28854.
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The paper aims to explore the social and economic factors influencing the flood preparedness of Zhengzhou, China and Leeds, United Kingdom residents. As one of the chosen areas, Zhengzhou experienced a terrible flood with an inaccurate weather forecast and little pre-flood preparedness in July 2021. On the other hand, Leeds has a long history of frequent floods. Wetter winters and stormy weather caused by climate change led to increased floods in Leeds. The consistent seasonal floods keep damaging residents and their properties, leading to economic losses. The authors conducted semi-structured interviews with residents who experienced floods in Zhengzhou and Leeds. Comparative parameters included economic and social, as these factors are hugely different in the study areas. The results showed that factors like education influence the households’ flood preparedness; likewise, economic factors like disposable income also affect the willingness of residents to spend on flood preparedness. Furthermore, the results revealed that with proactive flood management, both communities progressed in minimising the post-adverse effects of floods.
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Gajo, Marianne. "Moskauer Börse unterzeichnet Vereinbarung mit Rohstoffbörse Zhengzhou." Die Aktiengesellschaft 64, no. 20 (November 1, 2019): r295. http://dx.doi.org/10.9785/ag-2019-642008.
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Gajo, Marianne. "Kapitalmarkt-Report .Eurex Kooperiert Mit Rohstoffbörse Zhengzhou." Die Aktiengesellschaft 63, no. 20 (October 1, 2018): r288. http://dx.doi.org/10.9785/ag-2018-632007.
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Shen, Zhenzhou, Wenyi Yao, Peiqing Xiao, and Xueqin Yang. "Analysis of day rainfall characteristics of Zhengzhou." E3S Web of Conferences 38 (2018): 01031. http://dx.doi.org/10.1051/e3sconf/20183801031.
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Raindrop characteristics, including speed and size of raindrops, in Zhengzhou city of Yellow River basin were analyzed through a natural rainfall on the loess slope. Results showed that the process of natural rainfall belonged to a parabola and counts, size and terminal velocity would increase with the rainfall intensity rising. Besides, the size and terminal velocity of natural raindrops were relatively scattered; In the process of individual rainfall, the terminal velocity and its peak value were mainly focused between 0.8~5m/s and 1m/s, respectively. Size of raindrops were mainly consisted of 0.125-0.5mm, among which the terminal velocity of raindrops with a size of 0.125mm, 0.25mm, 0.375mm, 0.5mm were primarily 0.8-3.4m/s, 0.6-3.4m/s, 0.8-1m/s, 1-1.4m/s, respectively.
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Zou, Junchen, Jinyu Lu, Yanling Wang, Jianpeng Li, Huiyuan Liu, Lin Wang, Xiuxiu Liu, Zhenqi Ma, Xueqiong Xu, and Wensi Liu. "Visibility Variation in Zhengzhou from 2008–2017." IOP Conference Series: Earth and Environmental Science 631 (January 7, 2021): 012034. http://dx.doi.org/10.1088/1755-1315/631/1/012034.
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Huili, Gong, Li Menlou, and Hu Xinli. "Management of groundwater in Zhengzhou City, China." Water Research 34, no. 1 (January 2000): 57–62. http://dx.doi.org/10.1016/s0043-1354(99)00141-4.
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Xu, Ying, Xin Chen, Min Liu, Jin Wang, Fangzhao Zhang, Jianhui Cui, and Hongzhan Zhou. "Spatial–Temporal Relationship Study between NWP PWV and Precipitation: A Case Study of ‘July 20’ Heavy Rainstorm in Zhengzhou." Remote Sensing 14, no. 15 (July 29, 2022): 3636. http://dx.doi.org/10.3390/rs14153636.
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In order to study and forecast extreme weather, a comprehensive and systematic analysis of the spatial and temporal relationship between Precipitable Water Vapor (PWV), predicted by Numerical Weather Predication (NWP) data, and precipitation, is necessary. The goal of this paper was to study the temporal and spatial relationship between PWV and precipitation during the so-called ‘July 20’ (18–21 July 2021) heavy rainstorm in Zhengzhou. Firstly, the PWV data provided by 120 radiosonde stations uniformly distributed throughout the world, and two IGS stations in China, in 2020, was used to evaluate the accuracy of PWV estimation by ERA5 and MERRA-2 data, and the factors affecting the accuracy of NWP PWV were explored. Secondly, ERA5 PWV and the precipitation data of six meteorological stations were used to qualitatively analyze the relationship between PWV and precipitation during the ‘July 20’ heavy rainstorm in Zhengzhou. Finally, a quantitative study was conducted by an eigenvalue matching method. The main experimental results were as follows. Compared with MERRA-2 PWV, the accuracy of ERA5 PWV was slightly higher. Latitude, altitude and season were the influencing factors of the NWP PWV estimation accuracy. The change trend of ERA5 PWV was consistent with both 24 h cumulative precipitation and surface precipitation during the ‘July 20’ heavy rainstorm in Zhengzhou. The average optimal matching degree and optimal matching time between NWP PWV and surface precipitation during the ‘July 20’ heavy rainstorm in Zhengzhou was 56.6% and 3.68 h, respectively. The maximum optimal matching degree was 80.3%. The spatial–temporal relationship between NWP PWV and surface precipitation was strong.
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Li, Huawei, Sandor Jombach, Guohang Tian, Yuanzheng Li, and Handong Meng. "Characterizing Temporal Dynamics of Urban Heat Island in a Rapidly Expanding City: A 39 Years Study in Zhengzhou, China." Land 11, no. 10 (October 19, 2022): 1838. http://dx.doi.org/10.3390/land11101838.
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Extreme heat wave weather phenomena have erupted worldwide in recent years. The urban heat island (UHI) effect has exacerbated urban heat waves with serious consequences for urban energy and residents’ health. Therefore, a better understanding of the dynamics of the UHI effect and the influencing factors is needed in the context of carbon neutrality and global warming. This study used long-term observation and statistical data to investigate the urban heat island intensity (UHII) over the past 39 years (1981–2019) and to analyze the temporal changes of the UHI effect and the relationship between the UHI effect and indicators of rapid urbanization in Zhengzhou, China. The results showed that Zhengzhou is warming 2.2-times faster than the global land warming trend of about +0.9 °C from 1981 to 2019. There is a clear phase characteristic of the heat island effect in Zhengzhou, and it offers a rapid upward trend after 2000 and a positive correlation with the urbanization process; it was found that the social and economic conditions of urban expansion in Zhengzhou have a significant relationship with UHII. We also found that the denser the urban built-up area, the more obvious the heat island effect. Compared with other countries, the influence of national policies on urban development is an indirect factor influencing the change of UHI specifically for Chinese cities. This research could provide a reference for understanding the temporal dynamics of UHI in an expanding large city for sustainable urban planning and mitigating urban warming and environmental problems.
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Zhang, Zhengjia, Chao Wang, Mengmeng Wang, Ziwei Wang, and Hong Zhang. "Surface Deformation Monitoring in Zhengzhou City from 2014 to 2016 Using Time-Series InSAR." Remote Sensing 10, no. 11 (November 2, 2018): 1731. http://dx.doi.org/10.3390/rs10111731.
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In recent years, with the development of urban expansion in Zhengzhou city, the underground resources, such as underground water and coal mining, have been exploited greatly, which have resulted in ground subsidence and several environmental issues. In order to study the spatial distribution and temporal changes of ground subsidence of Zhengzhou city, the Interferometric Synthetic Aperture Radar (InSAR) time series analysis technique combining persistent scatterers (PSs) and distributed scatterers (DSs) was proposed and applied. In particular, the orbit and topographic related atmospheric phase errors have been corrected by a phase ramp correction method. Furthermore, the deformation parameters of PSs and DSs are retrieved based on a layered strategy. The deformation and DEM error of PSs are first estimated using conventional PSI method. Then the deformation parameters of DSs are retrieved using an adaptive searching window based on the initial results of PSs. Experimental results show that ground deformation of the study area could be retrieved by the proposed method and the ground deformation is widespread and unevenly distributed with large differences. The deformation rate ranges from −55 to 10 mm/year, and the standard deviation of the results is about 8 mm/year. The observed InSAR results reveal that most of the subsidence areas are in the north and northeast of Zhengzhou city. Furthermore, it is found that the possible factors resulting in the ground subsidence include sediment consolidation, water exploitation, and urban expansion. The result could provide significant information to serve the land subsidence mitigation in Zhengzhou city.
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Deng, Yun Chao, Pei Wen Hao, and Lei He. "Study on Capillarity Water Rise in Subgrade Soil." Advanced Materials Research 250-253 (May 2011): 1702–6. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1702.
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Many highways in China cross irrigation area of farm land. The water in rivers and ponds by two sides of roads can flush back into subgrade, and results in more water in subgrade soil, subgrade deformation and lowered capacity. With reconstruction and extension of Zhengzhou-Luohe segment in Jing–Zhu Highway as the research target, this study investigated the method for preventing underground water from entering subgrade. Through studying on capillarity water rise in typical soil of Zhengzhou–Luohe segment, we found out water rise pattern, predicted capillarity water rise and obtained the method for preventing capillarity water from rising into subgrade.
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He, Li, Jian’ge Tao, Ping Meng, Dan Chen, Meng Yan, and László Vasa. "Analysis of socio-economic spatial structure of urban agglomeration in China based on spatial gradient and clustering." Oeconomia Copernicana 12, no. 3 (September 27, 2021): 789–819. http://dx.doi.org/10.24136/oc.2021.026.
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Research background: Previous studies on the economic and social development of urban agglomerations mostly focus on a single primacy comparative analysis and efficiency evaluation. Spatial structure differentiation is an important feature of urban agglomeration. The lack of economic and social analysis on the spatial structure makes it impossible to determine the development positioning of each city in the urban agglomeration, which affects the sustainable economic devel-opment ability of these areas.
Purpose of the article: The objective of the article is to analyze the spatial development law and experience of urban agglomeration, this study explores the practice of economic and population spatial structure of city areas in China. For this purpose, CPUA and its central city Zhengzhou was taken as an example, the spatial gradient structure of example was analyzed.
Methods: Using economic and population data of 32 cities in this region, growth pole theory, and pole-axis theory, the economic and population spatial structure of urban agglomeration, the spatial gradient structure of central cities in urban agglomerations were analyzed with the method of cluster about radiation index.
Findings & value added: (1) In the process of the formation of CPUA, the geo-graphical spatial pattern plays a decisive role in economic and social development. This is an experience from developing countries. (2) CPUA presents a gradient development pattern with Zhengzhou as the center, and economic and social development gradually radiates to the metropolitan area, the core development area, and the character development demonstration area. (3) The economic and social gradients of Zhengzhou, the central city, present the hierarchy rules and characteristics which are driven by the Beijing-Guangzhou-Railway axis and the Longhai-Railway axis. (4) The central city of Zhengzhou still presents insufficient primacy in regional development, which shows that Zhengzhou accounts for 6% of the population of the Central Plains Economic Zone and 14% of GDP, and insufficient agglomeration. Different countries at different stages of economic development have different urban agglomeration development models. The conclusions from China provide new decision-making ideas and methods for spatial structure research and development strategy analysis of urban agglomerations.
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Guo, Pengfei, Fangfang Zhang, Haiying Wang, and Fen Qin. "Suitability Evaluation and Layout Optimization of the Spatial Distribution of Rural Residential Areas." Sustainability 12, no. 6 (March 19, 2020): 2409. http://dx.doi.org/10.3390/su12062409.
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A reasonable layout optimization strategy of rural residential areas can improve the quality of life of rural residents and promote rural revitalization. Evaluating the suitability of rural residential areas is the basis of layout optimization. Based on 1:100,000 land cover data and a digital elevation model (30 m) for the Henan Province, China, we used the minimum cumulative resistance model to evaluate the spatial distribution suitability of rural settlements in the Zhengzhou administrative area (abbreviated: Zhengzhou). Then, we used a weighted Voronoi diagram to determine the scope of influence of central villages and determined the direction of relocation for the “combined migration” rural residential areas. The study results support the following conclusions: (1) the comprehensive resistance value of rural residential areas in the Northeastern part of Zhengzhou is low and the suitability is high. However, the comprehensive resistance value of the Southwestern part is high and the suitability is low. (2) The study area can be divided into highly suitable areas, suitable areas, generally suitable areas, unsuitable areas, and extremely unsuitable areas. Unsuitable areas and extremely unsuitable areas accounted for 33.66% of the total area and included 662 rural residential areas. (3) The rural residential areas were divided into four types of optimization: urbanization, key development, controlled development, and combined migration. Based on an analysis of the characteristics of each type of rural residential area, we proposed corresponding optimization strategies. The results remedy the lack of layout optimization strategies for large-scale rural residential areas and can provide support for the optimization of the layout of rural residential areas in Zhengzhou. Furthermore, the research techniques may apply to other regions.
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Peng, Qingxiu, and Yujie Wang. "Study on the Path of Three-Chain Integration of the Logistics Service Industry in Zhengzhou." Mathematical Problems in Engineering 2022 (January 10, 2022): 1–13. http://dx.doi.org/10.1155/2022/7465152.
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To optimize the spatial layout of modern logistics services in Zhengzhou, build a driving mechanism for the professional development of logistics services, and promote logistics services to give full play to the driving force of coordinated development of regional economy, we must base ourselves on the logistics service industry chain, strengthen industrial innovation, value innovation and integration innovation, and realize the reconstruction of the value chain of logistics service industry. Based on the three-chain integration theory, this paper constructs a fuzzy comprehensive evaluation model for the three-chain integration of logistics service industry, adopts a combination of qualitative and quantitative methods, evaluates the effect of the three-chain integration of logistics service industry in Zhengzhou, and aims at the problems existing in the process of three-chain integration, such as lack of systematic planning, weak competitiveness, and low profitability. Measures such as improving fiscal and tax incentives, clarifying strategic positioning, overall planning of industry layout, strengthening innovation, and integrating new driving forces for the development of logistics service industry will further promote the in-depth integration of logistics service industry chain, value chain, and innovation chain in Zhengzhou.
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Du, Chenyu, Peihao Song, Kun Wang, Ang Li, Yongge Hu, Kaihua Zhang, Xiaoli Jia, et al. "Investigating the Trends and Drivers between Urbanization and the Land Surface Temperature: A Case Study of Zhengzhou, China." Sustainability 14, no. 21 (October 25, 2022): 13845. http://dx.doi.org/10.3390/su142113845.
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The effect of urbanization on the urban thermal environment (UTE) has attracted increasing research attention because its significant effects on local weather and climate, and serious consequences for people. However, systematic study of the relationship between urbanization and UTE has been undertaken only to a limited extent. Using quantitative thermal remote sensing and multi-buffer ring method and multiple spatial scales method, here we analyze Landsat TM/ETM+ images of Zhengzhou in Central China acquired on four different dates in 2017 to investigate the spatiotemporal variations, trends, and driving force in the land surface temperature (LST). Our results showed that LST generally increased with urbanization intensity. This trend was extremely obvious in spring and summer, weak in winter, and slightly downward in autumn. Moreover, PLAND (e.g., percentage of impervious surface in a landscape) has the most significant effect on urban LST, and generally increases as the spatial scale becomes larger. In conclusion, the study recommends that urban planning in Zhengzhou should prioritize PLAND, especially at large spatial scales. These results provide a scientific reference for urban planners who are committed to the sustainable development of Zhengzhou City.
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Chen, Qi, Yibo Yan, Xu Zhang, and Jian Chen. "A Study on the Impact of Built Environment Elements on Satisfaction with Residency Whilst Considering Spatial Heterogeneity." Sustainability 14, no. 22 (November 13, 2022): 15011. http://dx.doi.org/10.3390/su142215011.
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The built environment, as perceived and felt by human beings, can shape and affect residential satisfaction. From the perspective of municipal administrators, understanding the building environment and its relationship with people’s residential satisfaction is crucial to improving people’s living environment. This study examines the correlation between built environment elements and residential satisfaction using the consideration of spatial heterogeneity of such a correlation. Machine vision technology is introduced to quantify the design dimension of the built environment. The method of multiscale geographically weighted regression is used to evaluate the relationship between built environment and residential satisfaction and to analyze the spatial heterogeneity in the influencing effects. This empirical study draws on 399 collected samples from the residents of Zhengzhou, China. The results show that elements of the built environment, including street space design features, have a significant effect on people’s residential satisfaction in Zhengzhou City. The factors of functional diversity and distance to the city center show spatial heterogeneity in influencing effects on residential satisfaction. The results of this study could help municipal managers to improve people’s residential satisfaction in Zhengzhou City through the development of urban renewal policies.
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Zhu, Li Juan, and Yan Jia. "Construction of Green Space System of Disaster-Prevention in Old Districts of Zhengzhou City." Advanced Materials Research 450-451 (January 2012): 1314–17. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.1314.
Повний текст джерелаАнотація:
Zhengzhou is the important traffic and communications center. With the rapid development of economic and increase in population, but the speed of construction on urban disaster prevention and reduction is far behind the process of urban economy. Once the earthquake disaster was happened, the consequences was serious. This paper investigates the construction of disaster-prevention green space in old districts of Zhengzhou city, analyzes the problems in the capacity of refuge and planning layout of disaster-prevention green space, and presents to enhance awareness of prevention, perfect green space system of disaster-prevention, expand the capacity in green space of disaster-prevention and increase constantly input in scientific research.
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Xia, Tian, Xiao Xiao Qi, Li Jun Deng, and Yi Xian Sun. "Modeling & Simulating of Hami-Zhengzhou UHVDC Transmission Project and Security & Stability Analysis of Send-Side Power System." Advanced Materials Research 1070-1072 (December 2014): 790–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.790.
Повний текст джерелаАнотація:
Hami-Zhengzhou ±800kV DC project is the first ultra high-voltage project for Xinjiang power transmission, it is also the first DC transmission project binding thermal and wind power, with bipolar low-end operation in 2013 and bipolar operation in the middle of 2014. The rated power is 8,000MW. This article focused on Hami-Zhengzhou HVDC transmission system, established the electromechanical model, which improved commutation failure treatment in the traditional DC control system and made the simulation results more close to the real operation condition. Based on this model, security and stability analysis of power grid was carried out and the corresponding control strategies/schemes were brought up.