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

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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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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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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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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A Theoretical Research on the System of Regional Development Models

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Systems Science and Systems Engineering 1994年第3期4卷 232-240页

作者： qin yaochen ZHAO Bingdong YUAN Zhongjin Henan University, Kaifeng 475001,P.R.China

According to the to the typical practice in some less developed regions this paperre developed regions,this paper researches the theories and methods of construction of regional development *** In accordance with the of region system of man-land relationship,the auther analyses the natural evolution trends of region system as wed as the internal and the spatiai structun of region *** the basis of theoretical study and typical example analyses,the paper presents a system of regional develoment models,including forecasting models,structure analysis and planning models,spatial-location models and strategic decision models.

关键词： region system, man-land relatioship theory system of regional development models.regioeal development models farecasting model struture analysis planning model

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论蒯因本体论承诺思想对地理学的意义

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地域研究与开发 2013年第4期32卷 8-14页

作者：刘凯秦耀辰河南财经政法大学资源与环境科学学院/区域可持续发展研究中心郑州450002 河南大学环境与规划学院河南开封475001

在阐述蒯因本体论承诺思想背景和内涵的基础上,以本体论承诺为透视的基本视域,论述了该思想对地理学研究的意义,提出了地理学本体论承诺的原则,并借助蒯因本体论承诺思想探讨了地理学多元化的根源。地理学研究中,任何的本体论立场都有... 详细信息

在阐述蒯因本体论承诺思想背景和内涵的基础上,以本体论承诺为透视的基本视域,论述了该思想对地理学研究的意义,提出了地理学本体论承诺的原则,并借助蒯因本体论承诺思想探讨了地理学多元化的根源。地理学研究中,任何的本体论立场都有其历史的和视域的限制,因而也都有其局限性和相对性。因此,以某种具体的哲学本体论立场或者某种地理存在为前提的具体地理学理论和学派也都有其历史和视域的局限,澄明和揭示其本体论承诺有助于更加合理地评价和看待地理学的不同理论观点和学派,而且对确立地理学研究的一些基本立场有着重要的意义。

关键词：地理学本体论承诺多元化根源蒯因

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

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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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利用IANN建立县域种植业可持续发展预警模型

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农业工程学报 2012年第9期28卷 213-221页

作者：张金萍秦耀辰艾少伟河南大学黄河文明与可持续发展研究中心/环境与规划学院开封475004 聊城大学环境与规划学院聊城252059

区域种植业系统的生存和发展易受到来自种植业经济社会、资源和环境等因素的干扰,使其可能偏离正常的运行轨道,产生各种警情。该文基于加权主成分分析算法,从优化网络初始权值入手,对误差反传BP算法进行改良,形成快速收敛和高精度的加... 详细信息

区域种植业系统的生存和发展易受到来自种植业经济社会、资源和环境等因素的干扰,使其可能偏离正常的运行轨道,产生各种警情。该文基于加权主成分分析算法,从优化网络初始权值入手,对误差反传BP算法进行改良,形成快速收敛和高精度的加权主成分网络模型WPCA-NN。从而将黄色预警法与非线性模拟方法巧妙结合,建立了科学合理的短期县域种植业可持续性预警指标体系和模型体系,并以黄河下游沿岸典型县市垦利和封丘为案例进行了实证研究。研究表明:1)种植业可持续性的空间尺度属性非常重要,以改进人工神经网络(IANN)为核心的县域种植业可持续性预警模型体系具有良好的可操作性。2)WPCA-NN既能反映决策者对各指标的偏好程度,又能规避经典BP算法学习速度慢和易陷入局部极小的缺陷。3)县域种植业可持续性预警实证分析达到预期结果并符合实际。2010-2014年两县警情以轻警和中警为主,资源和环境方面警兆的异常波动,尤其是权重较大的警兆指标对警情有着更为直接的影响。

关键词：神经网络模型算法种植业可持续性黄色预警法黄河下游

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