Promoting urban-rural integration and facilitating the bidirectional flow of urban and rural elements are core spatial objectives in the new era of China.The urban-rural fringe represents the region with the most inte...Promoting urban-rural integration and facilitating the bidirectional flow of urban and rural elements are core spatial objectives in the new era of China.The urban-rural fringe represents the region with the most intense interaction between urban and rural areas,serving as a key zone for breaking down barriers and promoting urban-rural integration.Based on a systematic review of representative case studies and scholarly literature,this paper synthesizes the evolving research perspectives on the urban-rural fringe,with particular attention to how data-driven approaches that integrate official statistics,remote sensing imagery,points of interest,and mobile phone signaling data have advanced the characterization of fringe features,refined identification methods,and revealed emerging developmental trends through spatial clustering and machine learning classification.It proposes an integrated analytical framework encompassing administrative boundaries,economic metabolism,social activities,material infrastructure,and the ecological environment.The paper further examines the characteristics and emerging development trends of urban-rural fringe areas and advances a set of strategic directions to support urban-rural integration and more efficient resource allocation.These include expanding analytical dimensions,enhancing data integration,refining identification criteria,elucidating mechanisms of internal and external interactions,and strengthening interdisciplinary collaboration.Collectively,these efforts offer actionable insights for optimizing public service delivery,directing infrastructure investment in transportation and utilities,delineating ecological conservation boundaries,and implementing place-based socioeconomic revitalization strategies in the urban-rural fringe regions.展开更多
Urban functional area(UFA)is a core scientific issue affecting urban sustainability.The current knowledge gap is mainly reflected in the lack of multi-scale quantitative interpretation methods from the perspective of ...Urban functional area(UFA)is a core scientific issue affecting urban sustainability.The current knowledge gap is mainly reflected in the lack of multi-scale quantitative interpretation methods from the perspective of human-land interaction.In this paper,based on multi-source big data include 250 m×250 m resolution cell phone data,1.81×105 Points of Interest(POI)data and administrative boundary data,we built a UFA identification method and demonstrated empirically in Shenyang City,China.We argue that the method we built can effectively identify multi-scale multi-type UFAs based on human activity and further reveal the spatial correlation between urban facilities and human activity.The empirical study suggests that the employment functional zones in Shenyang City are more concentrated in central cities than other single functional zones.There are more mix functional areas in the central city areas,while the planned industrial new cities need to develop comprehensive functions in Shenyang.UFAs have scale effects and human-land interaction patterns.We suggest that city decision makers should apply multi-sources big data to measure urban functional service in a more refined manner from a supply-demand perspective.展开更多
The meso-2,6-dichlorophenyl boron-dipyrromethene(BODIPY) derivative 1 was synthesized and characterized by single-crystal X-ray diffraction analysis, 1 H NMR and Esi-HRMS. Compound 1 crystallizes in monoclinic, space ...The meso-2,6-dichlorophenyl boron-dipyrromethene(BODIPY) derivative 1 was synthesized and characterized by single-crystal X-ray diffraction analysis, 1 H NMR and Esi-HRMS. Compound 1 crystallizes in monoclinic, space group P21/n with a = 8.717(4), b = 20.938(9), c = 12.402(6) Å, β = 98.660(7)°, V = 2237.7(17) Å^(3), D3 c = 1.333 Mg/cm, F(000) = 936, μ = 0.319 mm^(-1), Z = 4, the final R = 0.0537 and wR = 0.1556 for 5064 observed reflections with I > 2ζ(I). Its photophysical properties were investigated by fluorescence and UV-Vis spectrum. 1 shows high fluorescence quantum yield in different solvents and poor solvent effect. In addition, compound 1 has high values of initial decomposition temperature(298 ℃). Moreover, cell imaging experiments showed 1 is promising for further bioimaging applications.展开更多
In order to determine the population dynamics of Ostrinia furnacalis and reasons of local heavy occurrence in Wafangdian,Liaoning Province,adult sexual attraction monitoring and larva damage investigation of O.furnaca...In order to determine the population dynamics of Ostrinia furnacalis and reasons of local heavy occurrence in Wafangdian,Liaoning Province,adult sexual attraction monitoring and larva damage investigation of O.furnacalis were carried out from 2016 to 2018.The results showed that the initial occurrence period of overwintering adults of O.furnacalis in 2017 and 2018 was 10-16 d earlier than that in 2016,and the occurrence period of adults in the field was extended for 22-26 d,with three occurrence peaks of adults;the number of young larvae in corn field increased significantly in early September.In 2017 and 2018,the control effects of Trichogramma dendrolimi release on the first generation of O.furnacalis in 2017 and 2018 were 70.65%and 67.84%,respectively,lower than that in 2016(76.19%).It is speculated that the difference of annual climatic conditions and adjustment of local planting structure are the main reasons for population dynamic changes of O.furnacalis.展开更多
基金Under the auspices of the Funding Project of Northeast Geological S&T Innovation Center of China Geological Survey(No.QCJJ2024-11)Natural Science Foundation of Liaoning Province(No.2025-BS-0873)+1 种基金Liaoning Provincial Joint Science and Technology Program(No.2024-MSLH-507)National Social Science Foundation of China(No.23ATJ006)。
文摘Promoting urban-rural integration and facilitating the bidirectional flow of urban and rural elements are core spatial objectives in the new era of China.The urban-rural fringe represents the region with the most intense interaction between urban and rural areas,serving as a key zone for breaking down barriers and promoting urban-rural integration.Based on a systematic review of representative case studies and scholarly literature,this paper synthesizes the evolving research perspectives on the urban-rural fringe,with particular attention to how data-driven approaches that integrate official statistics,remote sensing imagery,points of interest,and mobile phone signaling data have advanced the characterization of fringe features,refined identification methods,and revealed emerging developmental trends through spatial clustering and machine learning classification.It proposes an integrated analytical framework encompassing administrative boundaries,economic metabolism,social activities,material infrastructure,and the ecological environment.The paper further examines the characteristics and emerging development trends of urban-rural fringe areas and advances a set of strategic directions to support urban-rural integration and more efficient resource allocation.These include expanding analytical dimensions,enhancing data integration,refining identification criteria,elucidating mechanisms of internal and external interactions,and strengthening interdisciplinary collaboration.Collectively,these efforts offer actionable insights for optimizing public service delivery,directing infrastructure investment in transportation and utilities,delineating ecological conservation boundaries,and implementing place-based socioeconomic revitalization strategies in the urban-rural fringe regions.
基金Under the auspices of Natural Science Foundation of China(No.41971166)。
文摘Urban functional area(UFA)is a core scientific issue affecting urban sustainability.The current knowledge gap is mainly reflected in the lack of multi-scale quantitative interpretation methods from the perspective of human-land interaction.In this paper,based on multi-source big data include 250 m×250 m resolution cell phone data,1.81×105 Points of Interest(POI)data and administrative boundary data,we built a UFA identification method and demonstrated empirically in Shenyang City,China.We argue that the method we built can effectively identify multi-scale multi-type UFAs based on human activity and further reveal the spatial correlation between urban facilities and human activity.The empirical study suggests that the employment functional zones in Shenyang City are more concentrated in central cities than other single functional zones.There are more mix functional areas in the central city areas,while the planned industrial new cities need to develop comprehensive functions in Shenyang.UFAs have scale effects and human-land interaction patterns.We suggest that city decision makers should apply multi-sources big data to measure urban functional service in a more refined manner from a supply-demand perspective.
基金Supported by the National Key R&D Program of China(2016YFD0600804)Natural Scientific Foundation of Jiangsu Province(No.BK20160922)+2 种基金National Natural Scientific Foundation of China(No.21606133)the open Fund of Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals(JSBGFC12002)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX17_0848)
文摘The meso-2,6-dichlorophenyl boron-dipyrromethene(BODIPY) derivative 1 was synthesized and characterized by single-crystal X-ray diffraction analysis, 1 H NMR and Esi-HRMS. Compound 1 crystallizes in monoclinic, space group P21/n with a = 8.717(4), b = 20.938(9), c = 12.402(6) Å, β = 98.660(7)°, V = 2237.7(17) Å^(3), D3 c = 1.333 Mg/cm, F(000) = 936, μ = 0.319 mm^(-1), Z = 4, the final R = 0.0537 and wR = 0.1556 for 5064 observed reflections with I > 2ζ(I). Its photophysical properties were investigated by fluorescence and UV-Vis spectrum. 1 shows high fluorescence quantum yield in different solvents and poor solvent effect. In addition, compound 1 has high values of initial decomposition temperature(298 ℃). Moreover, cell imaging experiments showed 1 is promising for further bioimaging applications.
文摘In order to determine the population dynamics of Ostrinia furnacalis and reasons of local heavy occurrence in Wafangdian,Liaoning Province,adult sexual attraction monitoring and larva damage investigation of O.furnacalis were carried out from 2016 to 2018.The results showed that the initial occurrence period of overwintering adults of O.furnacalis in 2017 and 2018 was 10-16 d earlier than that in 2016,and the occurrence period of adults in the field was extended for 22-26 d,with three occurrence peaks of adults;the number of young larvae in corn field increased significantly in early September.In 2017 and 2018,the control effects of Trichogramma dendrolimi release on the first generation of O.furnacalis in 2017 and 2018 were 70.65%and 67.84%,respectively,lower than that in 2016(76.19%).It is speculated that the difference of annual climatic conditions and adjustment of local planting structure are the main reasons for population dynamic changes of O.furnacalis.
