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Assessing the Spatial Equality of COVID Testing Sites Maintaining Zero COVID Policy

Journal of Geographic Information System 2024年第3期16卷 183-200页

作者： Muhammad Sajid Mehmood Gang Li Shiyan Zhai yaochen qin Annan Jin Lan Li College of Geography and Environmental Science Henan University Kaifeng China Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions Ministry of Education Henan University Kaifeng China INTI International University Nilai Malaysia College of Urban and Environmental Sciences Northwest University Xian China Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity Xian China

Rapid and timely testing is essential to minimize the COVID-19 spread. Decision makers and policy planners need to determine the equal distribution and accessibility of testing sites. This study mainly examines the spatial equality of COVID-19 testing sites that maintain a zero COVID policy in Guangzhou City. The study has identified the spatial disparities of COVID testing sites, characteristics of testing locations, and accessibility. The study has obtained information on COVID testing sites in Guangzhou City and population data. Point pattern analyses, Euclidian distance and allocation, and network analyses are the main methods used to achieve the research objectives, and 1183 total COVID testing sites can be recognized in Guangzhou City. Results revealed that spatial disparities could be noticed over the study area. Testing locations of Guangzhou City are highly clustered. The most significant testing sites are located in Haizhu District, which has the third largest population. The highest population density can be identified in Yuexiu District. However, only 94 testing sites are located there. According to all the results, higher disparities can be identified, and a lack of testing sites is located in the north part of the study area. Some people in the northern part have to travel more than 10 km to reach a testing site. Finally, this paper suggests increasing the number of testing sites in the north and south parts of the study area and keeping the same distribution, considering the area, total population, and population density. This kind of research will be helpful to decision-makers in making proper decisions to maintain a zero COVID policy.

关键词： COVID-19 Testing Sites Spatial Disparities Spatial Equality Guangzhou City Accessibility

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Exploring the Relationship between Spatiotemporal Variations in Air Quality and Meteorological Parameters before and during the COVID-19 Pandemic in Xi’an

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Journal of Geoscience and Environment Protection 2024年第8期12卷 115-148页

作者： Muhammad Sajid Mehmood Shiyan Zhai Gang Li yaochen qin Vithana Pathirannehelage Indika Sandamali Wijeratne College of Geography and Environmental Science Henan University Kaifeng China Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions Ministry of Education Henan University Kaifeng China INTI International University Persiaran Perdana BBN Nilai Malaysia College of Urban and Environmental Sciences Northwest University Xian China Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity Xian China Department of Geography University of Colombo Cumarathunga Munidasa Mawatha Colombo Sri Lanka

The COVID-19 pandemic has significantly changed the air pollution of the world. The present study investigated the temporal and spatial variability in air quality in Xi’an, China, and its relationship with meteorological parameters during and before the COVID-19 pandemic. The outcomes of this study indicated that air pollutants, PM2.5, NO2, PM10, CO, and SO2 are likely to decrease during winter (25%, 50%, 30%, 40%, and 35%) to spring (30%, 55%, 38%, 50%, and 40%) and summer (40%, 58%, 60%, 55%, and 47%), respectively. However, the concentration of O3-8h increased by 40%, 55%, and 65% during winter, spring, and summer, respectively. The values of the air quality index decreased during the COVID-19 period. Furthermore, significant positive trends were reported in PM2.5, NO2, PM10, O3, and SO2, and no notable trends in CO during the COVID-19 pandemic. Both during and before the COVID-19 period, PM10, NO2, PM2.5, CO, and SO2 showed a negative correlation with the temperature and a moderately positive significant correlation between O3-8h and temperature. The findings of this study would help understand the air pollution circumstances in Xi’an before and during the COVID-19 period and offer helpful information regarding the implications of different air pollution control strategies.

关键词： Spatiotemporal Analysis Air Quality Index Meteorological Parameters COVID-19

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黄河流域行业碳减排成效评价

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环境科学学报 2024年第6期44卷 425-438页

作者：崔盼盼张丽君秦耀辰夏四友河南大学地理与环境学院黄河中下游数字地理技术教育部重点实验室开封475004 河南大学黄河文明与可持续发展研究中心暨黄河文明省部共建协同创新中心开封475004 中国科学院地理科学与资源研究所中国科学院区域可持续发展分析与模拟重点实验室北京100101 纽约州立大学布法罗分校地理系布法罗NY 14261

行业碳减排成效评价是实现黄河流域高质量发展的重要支撑.借助矫正系数、LMDI-Ⅰ方法测度行业碳减排有效性和贡献性,对黄河流域碳排放强度下降过程中9省(自治区)六大行业的碳减排成效进行评价.结果显示:①黄河流域整体及分行业碳排放强... 详细信息

行业碳减排成效评价是实现黄河流域高质量发展的重要支撑.借助矫正系数、LMDI-Ⅰ方法测度行业碳减排有效性和贡献性,对黄河流域碳排放强度下降过程中9省(自治区)六大行业的碳减排成效进行评价.结果显示:①黄河流域整体及分行业碳排放强度均呈波动下降趋势,其中,工业的碳排放强度下降量和下降幅度均较大.②行业间碳减排有效性存在显著差异,工业、建筑业和和交通运输、仓储及邮政业始终为碳减排有效行业,其在空间上均具有显著不均衡特征,随上、中、下游不同发展水平呈现不同的空间变化趋势.③多数行业对黄河流域碳排放强度的下降做出了贡献,中下游地区倾向于以多行业贡献为主,上游地区倾向于以单行业贡献为主,且行业碳排放强度是促进黄河流域碳排放强度下降的主要因素,尤其是个别省份的工业碳排放强度贡献较高.④行业碳减排成效不容乐观,但整体有所改善.工业的碳减排成效较好,始终为碳减排成效良好型,9省(自治区)六大行业中的碳减排成效良好型数量显著增加,前阶段主要分布于多数省份的工业和建筑业,后阶段主要分布于多数省份的工业和交通运输、仓储及邮政业,而欠佳型数量呈下降趋势.未来黄河流域各省份中的行业碳减排重点与难点具有差异性,需因地制宜、因业施策,同时也需遵循“一盘棋”的思想,促进协同碳减排.

关键词：碳排放强度有效性综合贡献碳减排成效

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Multi-scale integrated assessment of urban energy use and CO_2 emissions

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Journal of Geographical Sciences 2014年第4期24卷 651-668页

作者： ZHANG Lijun LIU Gangjun qin yaochen College of Environment and Planning Henan University Kaifeng 475004 Henan China Henan Collaborative Innovation Center for Coordinating Industrialization Urbanization and Agriculture Modernization in Central Economic Zone Kaifeng 475004 Henan China College of Science Engineering and Health RMIT University Melbourne 3000 Australia

Accurate and detailed accounting of energy-induced carbon dioxide （CO_2） emis- sions is crucial to the evaluation of pressures on natural resources and the environment, as well as to the assignment of responsibility for emission reductions. However, previous emission inventories were usually productionor consumption-based accounting, and few studies have comprehensively documented the linkages among socio-economic activities and external transaction in urban areas. Therefore, we address this gap in proposing an analytical framework and accounting system with three dimensions of boundaries to comprehensively assess urban energy use and related CO_2 emissions. The analytical framework depicted the input, transformation, transfer and discharge process of the carbon-based （fossil） energy flows through the complex urban ecosystems, and defined the accounting scopes and boundaries on the strength of ＇carbon footprint＇ and ＇urban metabolism＇. The accounting system highlighted the assessment for the transfer and discharge of socio-economic subsystems with different spatial boundaries. Three kinds methods applied to Beijing City explic- itly exhibited the accounting characteristics. Our research firstly suggests that urban carbon-based energy metabolism can be used to analyze the process and structure of urban energy consumption and CO_2 emissions. Secondly, three kinds of accounting methods use different benchmarks to estimate urban energy use and CO_2 emissions with their distinct strength and weakness. Thirdly, the empirical analysis in Beijing City demonstrate that the three kinds of methods are complementary and give different insights to discuss urban energy-induced CO_2 emissions reduction. We deduce a conclusion that carbon reductions responsibility can be assigned in the light of production, consumption and shared responsibility based principles. Overall, from perspective of the industrial and energy restructuring and the residential lifestyle changes, our results s

关键词： complex ecosystem urban metabolism carbon-based energy CO_2 emissions accounting methods

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中国城市数字鸿沟时空分异及其影响因素

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世界地理研究 2024年第2期33卷 108-122页

作者：段杰冉张丽君秦耀辰张慧馨田梦男王静帆河南大学地理与环境学院黄河中下游数字地理技术教育部重点实验室开封475004 河南大学黄河文明与可持续发展研究中心暨黄河文明省部共建协同创新中心开封475004

各城市在获取和使用信息通信技术(ICTs)方面存在的不均衡性已成为制约数字中国建设的关键问题,因而分析城市ICTs发展差异及影响因素成为缩小数字鸿沟研究的重要内容。采用国际电信联盟定义的信息通信技术发展指数(IDI),利用区位熵法测... 详细信息

各城市在获取和使用信息通信技术(ICTs)方面存在的不均衡性已成为制约数字中国建设的关键问题,因而分析城市ICTs发展差异及影响因素成为缩小数字鸿沟研究的重要内容。采用国际电信联盟定义的信息通信技术发展指数(IDI),利用区位熵法测度中国275个城市2005年以来的数字鸿沟,进而运用空间分析与计量方法分析其时空分异格局和影响因素。研究发现:(1)中国信息通信技术发展指数区位熵(IDILQ)仍处于较低水平,城市之间数字鸿沟虽然有不断收敛的趋势,但东、中、西地区的差异仍然较大。(2)从时空格局来看,IDILQ“高-高”集聚区一直位于东部沿海的长江三角洲地区和珠江三角洲地区,“低-低”集聚区则由西部地区向中部地区转移。(3)IDILQ高的城市对周边城市存在“极化效应”。但是,年轻人口比重越高、城镇化水平越高、信息技术业从业人员比重越大越有利于提高城市IDILQ,缩小数字鸿沟。在数字革命转型中,要谨防信息化对收缩城市、老龄化城市建设带来的不利影响。

关键词：数字鸿沟信息通信技术空间面板SDM模型区域差异中国

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Geography＇s ＂World view＂： The ontological issues of geography

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Journal of Geographical Sciences 2017年第12期27卷 1541-1555页

作者： LIU Kai TANG Maolin LIU Rongzeng qin yaochen School of Resources and Environment Science Henan University of Economics and Law Zhengzhou 450002 China School of Geographical Sciences & Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing Normal University Nanjing 210023 China Ministry of Education Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions Henan University Kaifeng 475001 Henan China

Contemporary science philosophy suggests that discussing ontological problems is of fundamental significance broadly within certain specific disciplines. Natural and social science research are inseparable from philosophical guidance; for instance, the philosophy of geography is the ideological basis for geography. The traditional philosophy of geography is methodology- oriented, which primarily emphasizes the ＂logical structure of geography explanations,＂ and ig- nores the discussion of its ontology. This study, in the context of the philosophy of science, ex- plores the relationships between methodology, ontology, and the philosophy of geography, defines the connotations of geographical ontology, analyzes the links and differences between philoso- phical ontology and scientific ontology of geography, clarifies the nature of geographical ontology, and summaries its theoretical values. The ontology of geography incorporates the philosophically ontological beliefs of geographers and geographical schools and the ontological commitment of the theory of geography. As different geographers hold different philosophical viewpoints, their ontological beliefs are different; one geographical theory asserts an ontological commitment of ＂what is there,＂ which determines the nature and types of objectives the theory references. The ontological beliefs of geographers determine their epistemology, methodology, and axiology, and the ontological commitment of a geographical theory is the premise and basis of that theory.

关键词： geography philosophy of science ontology pluralism methodology theoretical value

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The spatio-temporal variations of frost-free period in China from 1951 to 2012

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Journal of Geographical Sciences 2017年第1期27卷 23-42页

作者： NING Xiaoju LIU Gangjun ZHANG Lijun qin Xiaoyang ZHOU Shenghui qin yaochen College of Environment and Planning Key Laboratory of Geospatial Technology for Middle and Lower Yellow River RegionsHenan University College of Resources and Environment Henan Three New-Types Coordinated Development CenterHenan University of Economics and Law College of Science Engineering and HealthRMIT University124 LaTrobe Street Institute of Geography Henan Academy of Sciences

The frost-free period（FFP）first frost date（FFD） and last frost date（LFD） have been regard as the important climate variables for agricultural production. Understanding the spatio-temporal variations of the FFPFFD and LFD is beneficial to reduce the harmful impacts of climate change on agricultural production and enhance the agricultural adaptation. This study examined daily minimum temperatures for 823 national-level meteorological stationscalculated the values of FFDLFD and FFP for station-specific and region-specific from 1951 to 2012estimated the gradients of linear regression for station-specific moving averages of FFDLFD and FFPand assessed station-specific time series of FFP and detected the abrupt change. The results as follows： at both the station level and the regional levelthe FFP across China decreases with the increase of latitude from south to northand with the increase of altitude from east to west generally. At the station levelthe inter-annual fluctuations of FFDLFD and FFP in south and west agricultural regions are greater than those in north and east. At the regional levelexcluding the QT regiontemporal changes of FFP are relatively small in both the low-latitude and the high-latitude regionsbut for the mid-latitude regions. According to the linear trend gradients of the moving average values of station-specific FFDLFD and FFPFFD was delayedLFD advancedand FFP extended gradually over the 80% of China. Furthermorethe change magnitudes for FFDLFD and FFP in the north and east agricultural regions are higher than that in the southern and western. Among the 659 station-specific time series of FFP examined by the Mann-Kendall test341 stationslocated mainly in the north regionhave one identifiable and significant abrupt change. And at the 341 stations with identified abrupt changesmost（57%） abrupt changes occurred during 1991–2012followed by the periods of 1981–1990（28%）1971–1980（12%）and 1951–1970（3%）. The spatio-temporal variations of FFDLFD and FFP wou

关键词： frost-free period first frost date last frost date spatio-temporal variations agricultural region China

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Review on Quantitative Research Methods of Regional Sustainable Development in China

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Chinese Journal of Population,Resources and Environment 2010年第3期8卷 44-53页

作者： Zhang Jinping qin yaochen Zhang Erxun College of Environment and Planning Henan University Kaifeng Henan 475001 China College of Environment and Planning Liaocheng University Liaocheng Shandong 252059 China

Since the 1990s, with the in-depth study and understanding of sustainable development, quantitative study of regional sustainable development (RSD) was increasingly hot in China. Based on quantitative study of RSD from Core Periodical in China National Knowledge Infrastructure (1992–2008), statistical analysis on the annual distribution, periodicals distribution and changes of the distribution were made. And from perspectives of social–economic, ecological, systematic and emerging methods, the course, problems and trends of the quantitative study methods on RSD were examined and analyzed to get a clear summary. By the review, the context on the quantitative study of RSD was to be clarified. The study also showed that, primarily, fields involving quantitative study are expanding; second, big progresses and constant development have been made on the systematic method gradually sophisticated, the flourishing ecological method and emerging new methods in the context of cross and integration which has made complex integrated systems a more satisfactory solution; third, the method system has been more multi-angled, and the clues of independent innovation have been observed despite the fact that the introduction of imported method is the main trend. Although many problems exist, multi-scale study, dynamic timeseries study and inter-regional comparative study will be further exploited and increasingly carried out with the progress of spatial information technology, which would boost the development and application of new methods in RSD study.

关键词： regional sustainable development quantitative research models systematic methods ecological methods

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The relationships between urban-rural temperature difference and vegetation in eight cities of the Great Plains

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Frontiers of Earth Science 2019年第2期13卷 290-302页

作者： Yaoping CUI Xiangming XIAO Russell B DOUGHTY yaochen qin Sujie LIU Nan LI Guosong ZHAO Jinwei DONG Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions Henan UniversityKaifeng 475004China Department of Microbiology and Plant Biology Center for Spatial AnalysisUniversity of OklahomaNormanOK 73019USA Ministry of Education Key Laboratory of Biodiversity Science and Ecological Engineering Institute of Biodiversity ScienceFudan UniversityShanghai 200438China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China

Interpreting the relationship between urban heat island (UHI) and urban vegetation is a basis for understanding the impacts of underlying surfaces on UHL The calculation of UHI intensity (UHII) requires observations from paired stations in both urban and rural *** to the limited number of paired meteorological stations,many studies have used remotely sensed land surface temperature,but these time-series land surface temperature data are often heavily affected by cloud cover and other *** factors,together with the algorithm for inversion of land surface temperature,lead to accuracy problems in detecting the UHII,especially in cities with weak *** on meteorological observations from the Oklahoma Mesonet,a world-class network,we quantified the UHII and trends in eight cities of the Great Plains,USA,where data from at least one pair of urban and rural meteorological stations were *** examined the changes and variability in urban temperature,UHII,vegetation condition (as measured by enhanced vegetation index,EVI),and evapotranspiration (ET).We found that both UHI and urban cold islands (UCI) occurred among the eight cities during 2000-2014 (as measured by impervious surface area).Unlike what is generally considered,UHII in only three cities significantly decreased as EVI and ET increased (p < 0.1),indicating that the UHI or UCI cannot be completely explained simply from the perspective of the underlying *** vegetative cover (signaled by EVI) can increase ET,and thereby effectively mitigate the *** study station clearly showed that the underlying surface or vegetation affects urban-rural temperature,and that these factors should be considered during analysis of the UHI effect over time.

关键词： urbanization evapotranspiration urban cold island background climate air temperature

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Regional　Man-land　System:Its　Dynamics　Characters,Structure　and　Evolutionary　Models

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Systems Science and Systems Engineering 1997年第3期7卷 84-91页

作者： ZHAO Bingdong qin yaochen ZHAO qingliang Department of Geography, Henan University, Kaifeng 475001

From the point of view of dynamics, the author studies some important issues concerning the dynamics of the regional man land system. As a complex composition of man land interaction, the regional man land system is a semi open, nonlinear and partly controllable system which possesses a multi hierarchy interface structure and has its own evolutionary law. The dynamics characters, the dynamic structure and the evolutionary models of the regional man land system are all deeply discussed in this paper.

关键词： regional man land system dynamics characters dynamics structure evolutionary models.

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