State farms,although a minority in China’s agricultural sector,play a critical role in regions like Heilongjiang,leading national food production.However,how state farms(SFs)and rural household farms(RFs)respond to f...State farms,although a minority in China’s agricultural sector,play a critical role in regions like Heilongjiang,leading national food production.However,how state farms(SFs)and rural household farms(RFs)respond to food policies,especially the 2017 soybean subsidy policy(post-Sino–U.S.trade war)and the 2019 soybean revitalization policy,remains unclear.This study examines changes in cropping patterns on SFs and RFs in Heilongjiang from 2013 to 2022 using annual crop maps.We find that SFs,with larger and more clustered fields,responded more effectively to the soybean policies:soybean acreage recovery(2019–2021)reached 91.51%of pre-trade war levels for RFs and 98.2%for SFs;following the revitalization policy,maize-soybean rotations were implemented four times in 62.3%of SFs and 45.4%of RFs.These results highlight the influence of global trade and agricultural policies on cropland management,providing critical insights into sustainable practices and food security across different agricultural systems.展开更多
As the population continues to shrink in the black soil region of Northeast China since 2000,it is critical to master the impact of population shrinkage on rural functions to realize rural revitalization and sustainab...As the population continues to shrink in the black soil region of Northeast China since 2000,it is critical to master the impact of population shrinkage on rural functions to realize rural revitalization and sustainable development.In this study,we focused on the impacts of depopulation on the evolution and interrelationship of rural subfunctions.Based on the rural function indexes system,the TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution)method,spatial analysis method,and mathematical statistics analysis method were used to summarize the spatial and temporal characteristics of rural function development,as well as the effect of population shrinkage in the typical black soil region of Northeast China.The results showed that depopulation varied in the extent and duration between the forested region and plain areas,which both impacted the trajectories of rural subfunctions evolution.For the economic development function and ecological conservation function,the effect of continuous slight depopulation was beneficial,while the effect of rapid depopulation was adverse,which was exactly opposite to the agricultural production function.All forms of population shrinkage were conducive to the development of the social security function.With the deepening population shrinkage,depopulation mainly promoted the collaborative development between subfunctions in this study,except the relationship between agricultural production and social security function.But effects of depopulation on the interrelationship of rural subfunctions varied between the forested region and plain areas in some cases.The results provided evidence for the cognition that population shrinkage had complicated effects on rural subfunctions.展开更多
The effective use of land in Northeast China is of great significance for ensuring national food security and regional rural revitalization.In this study,based on the survey data collected from Jilin Province,Northeas...The effective use of land in Northeast China is of great significance for ensuring national food security and regional rural revitalization.In this study,based on the survey data collected from Jilin Province,Northeast China,we analyzed the vacancy rates of rural homesteads in suburban,outer suburban,and remote villages,as well as the withdrawal intention of rural-settled farmers,urbansettled farmers,and farmers with urban and rural dual residency from vacant homesteads.From the perspective of farmers’perceptions,this study constructed a theoretical framework of the influence mechanism of their withdrawal intention and analyzed such mechanism by constructing a structural equation model.The results indicated that:1)rural homestead vacancy rates increased with distance from the village to the city.2)rural-settled farmers showed a low withdrawal intention for vacant rural homesteads,followed by urban and rural dual-residence farmers,and urban-settled farmers showed the highest withdrawal intention.3)the relative importance of the factors influencing withdrawal intention is in the following order:policy awareness>interest perception>living environment perception>family characteristics.Finally,this study discussed the reformation of the homestead system and rural homestead transition in Northeast China,which can provide policy support to increase the potential of cultivated land and promote sustainable rural development and urban-rural coordination.展开更多
Exploring the relationship between social support and the mental health of cancer patients is a vital endeavor for enhancing mental well-being.The objective of this study was to explore the relationship between social...Exploring the relationship between social support and the mental health of cancer patients is a vital endeavor for enhancing mental well-being.The objective of this study was to explore the relationship between social support and psychological well-being in cancer patients and to provide new empirical evidence for psychological improvement in cancer patients.This research holds significant practical implications for optimizing China’s public health system and strengthening the development of a healthy China.Using data from the 2018 China Health and Retirement Longitudinal Study(CHARLS)database,we empirically examined the influence of social support on the mental health of cancer patients.Models such as Ordered Probit and OLogit were used to provide empirical evidence and theoretical insights for enhancing the mental health of cancer patients in a context marked by a high prevalence of cancer.The findings indicated that both formal and informal social support mechanisms were effective in improving the mental health of cancer patients.Furthermore,we utilized the propensity score matching(PSM)model to eliminate the endogeneity issue associated with sample selectivity bias.The results obtained through PSM demonstrated robustness,underscoring the importance of addressing sample selectivity bias when assessing the impact of social support on the mental health of cancer patients.Therefore,the Chinese government is recommended to prioritize the use of social support as a means to proactively enhance the mental health of cancer patients,thereby continuously elevating their overall quality of life.展开更多
Humans deeply influence the urbanizing of earth’s surface system in an exacerbating manner across space and time[1].Around the globe,urban land-use/cover changes reflect the intensities of human activities and land s...Humans deeply influence the urbanizing of earth’s surface system in an exacerbating manner across space and time[1].Around the globe,urban land-use/cover changes reflect the intensities of human activities and land shifts from nature or semi-nature lands to man-made–dominated surfaces[2].展开更多
This paper focuses on the economic resilience aspects of the financialization of infrastructure projects concerning enhancing market dynamics and risk regulation.We examined 39 infrastructure REITs listed in China bet...This paper focuses on the economic resilience aspects of the financialization of infrastructure projects concerning enhancing market dynamics and risk regulation.We examined 39 infrastructure REITs listed in China between June 2021 and June 2024.Utilizing an economic resilience evaluation model to assess the resistance and recovery capacities of these infrastructure REITs,we incorporate seven investor heterogeneity measures.A geographic detector model is employed to analyze divergence,identify key determinant factors,pinpoint risk zones,and investigate the interaction between these measures within the context of PPP-REITs and DI-REITs.The empirical results show that the investor ratio and expected investment tenure are critical to the construction of economic resilience indices for infrastructure REITs.Also,the interaction of factors holds significance toward influencing the divergence in economic resilience.Our findings reveal a "barrel effect" of investor heterogeneity in infrastructure project financial products,indicating a consistency between economic resilience and investor heterogeneity.By integrating the investor heterogeneity index into the resilience evaluation framework of infrastructure REITs,this study offers valuable insights into the risk-resistance capacity of infrastructure financial products and the enhancement of economic resilience in these projects.展开更多
Different symbiotic scenarios were designed and combined with oyster shell pollution managementcases in two different counties(labeled A and H in this study)using symbiosis theory and a game simulation modelto investi...Different symbiotic scenarios were designed and combined with oyster shell pollution managementcases in two different counties(labeled A and H in this study)using symbiosis theory and a game simulation modelto investigate the conditions for realizing multiparty symbiosis in oyster shell pollution management.The resultsshow that the primary condition for achieving a virtuous cycle of tripartite governance is active governance by thegovernment.To realize such tripartite governance,it is necessary to reduce the cost of government regulation andchange the government's concept and value orientation;to reduce the cost of social capital contracted for participation in governance to improve the sustainability of social capital in the case of governance participation;and thevillagers’public,as the destroyer of the environment and the beneficiary of governance,should change their traditional concept of governance.Changing the traditional concept of the villagers would improve the benefits that thevillagers can obtain by participating in governance,and this should be supplemented with corresponding rewardand punishment mechanisms to increase the cost of the villagers’choice not to participate.If the conditions listedabove are met,the system will enter a virtuous cycle of tripartite governance.Based on this,we hope to seek asustainable and replicable oyster shell pollution management path through the experiences of oyster shell pollutionmanagement in both A County and H County,so that we can better promote the rural revitalization strategy andrealize the construction of a beautiful China.展开更多
The revitalization of rural culture serves as the driving force and intellectual backbone for the overallresurgence of rural areas.Guided by the core values of socialism,this study delves into the exploration of effec...The revitalization of rural culture serves as the driving force and intellectual backbone for the overallresurgence of rural areas.Guided by the core values of socialism,this study delves into the exploration of effectivemethods for the transformation of the agricultural cultural heritage of ethnic minorities.This endeavor is not only ofimmediate importance in achieving the revival of rural culture but also plays a crucial role in supporting the development of agricultural heritage industries and catalyzing entrepreneurship in returning to and establishing businesses in rural regions.This article adopts a broad perspective,analyzing the current development status of theagricultural heritage of ethnic minorities in Heilongjiang.Through a thorough examination,it dissects the opportunities and challenges encountered in the creative transformation of this cultural heritage and endeavors to uncovereffective strategies within the broader context of the rural revitalization strategy.The findings of this study indicatethat there are some problems in the agricultural cultural heritage of ethnic minorities in Heilongjiang Province,suchas insufficient excavation,weak synergistic development of agricultural culture and industry,and low integration.Itis essential to construct a comprehensive agricultural heritage system for each ethnic minority in HeilongjiangProvince.Furthermore,a combination of diverse approaches must be employed to strengthen the inheritance andutilization of agricultural cultural heritage.展开更多
Accurate predictions of sea surface temperature(SST)are crucial due to the significant impact of SST on the global ocean-atmospheric system and its potential to trigger extreme weather events.Many existing machine-lea...Accurate predictions of sea surface temperature(SST)are crucial due to the significant impact of SST on the global ocean-atmospheric system and its potential to trigger extreme weather events.Many existing machine-learning-based ssT predictions adapt the traditional iterative point-wise prediction mechanism,whose predicting horizons and accuracy are limited owing to the high sensitivity to cumulative errors during iterative predictions.Therefore,this paper proposes a novel granulation-based long short-term memory(LsTM)-random forest(RF)combination model that can fully capture the feature dependencies involved in the fluctuation of SsT sequences,reduce the cumulative error in the iteration process,and extend the prediction horizons,which includes two sub-models(adaptive granulation model and hybrid prediction model).They can restack the one-dimensional ssT time-series into multidimensional feature variables,and achieve a strong forecasting ability.The analysis shows that the proposed model can achieve more accurate prediction-hours in nearly all prediction ranges from 1 to 125 h.The average prediction error of the proposed model in 25-125 h is 0.07 K,similar to that(0.067 K)in the first 24 h,which exhibits a high generalization performance and robustness and isthus a promising platform for the medium-and long-term forecasting of hourly SSTs.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2023YFD1500200)the National Natural Science Foundation of China(Grants No.72221002,42271375,42461144212)+2 种基金the Informatization Plan of the Chinese Academy of Sciences(Grant No.CAS-WX2021PY-0109)the funding project of Northeast Geological S&T Innovation Center Zone of China Geological Survey(Grant No.QCJJ2022-9)the funding project of China Association for Science and Technology(Grant No.XMSB20240927024).
文摘State farms,although a minority in China’s agricultural sector,play a critical role in regions like Heilongjiang,leading national food production.However,how state farms(SFs)and rural household farms(RFs)respond to food policies,especially the 2017 soybean subsidy policy(post-Sino–U.S.trade war)and the 2019 soybean revitalization policy,remains unclear.This study examines changes in cropping patterns on SFs and RFs in Heilongjiang from 2013 to 2022 using annual crop maps.We find that SFs,with larger and more clustered fields,responded more effectively to the soybean policies:soybean acreage recovery(2019–2021)reached 91.51%of pre-trade war levels for RFs and 98.2%for SFs;following the revitalization policy,maize-soybean rotations were implemented four times in 62.3%of SFs and 45.4%of RFs.These results highlight the influence of global trade and agricultural policies on cropland management,providing critical insights into sustainable practices and food security across different agricultural systems.
基金Under the auspices of China Postdoctoral Science Foundation(No.2022M713130)National Natural Science Foundation of China(No.42101212)Strategic Pilot Science and Technology Project of the Chinese Academy of Sciences(No.XDA28020403)。
文摘As the population continues to shrink in the black soil region of Northeast China since 2000,it is critical to master the impact of population shrinkage on rural functions to realize rural revitalization and sustainable development.In this study,we focused on the impacts of depopulation on the evolution and interrelationship of rural subfunctions.Based on the rural function indexes system,the TOPSIS(Technique for Order Preference by Similarity to an Ideal Solution)method,spatial analysis method,and mathematical statistics analysis method were used to summarize the spatial and temporal characteristics of rural function development,as well as the effect of population shrinkage in the typical black soil region of Northeast China.The results showed that depopulation varied in the extent and duration between the forested region and plain areas,which both impacted the trajectories of rural subfunctions evolution.For the economic development function and ecological conservation function,the effect of continuous slight depopulation was beneficial,while the effect of rapid depopulation was adverse,which was exactly opposite to the agricultural production function.All forms of population shrinkage were conducive to the development of the social security function.With the deepening population shrinkage,depopulation mainly promoted the collaborative development between subfunctions in this study,except the relationship between agricultural production and social security function.But effects of depopulation on the interrelationship of rural subfunctions varied between the forested region and plain areas in some cases.The results provided evidence for the cognition that population shrinkage had complicated effects on rural subfunctions.
基金Under the auspices of Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA28100405,XDA28020403)National Natural Science Foundation of China (No. 41771179, 42071275)+1 种基金Talents Training Project Supported by the Central Government for the Reform and Development of Local UniversitiesYoung Scientist Group Project of Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences (No. 2022QNXZ02)
文摘The effective use of land in Northeast China is of great significance for ensuring national food security and regional rural revitalization.In this study,based on the survey data collected from Jilin Province,Northeast China,we analyzed the vacancy rates of rural homesteads in suburban,outer suburban,and remote villages,as well as the withdrawal intention of rural-settled farmers,urbansettled farmers,and farmers with urban and rural dual residency from vacant homesteads.From the perspective of farmers’perceptions,this study constructed a theoretical framework of the influence mechanism of their withdrawal intention and analyzed such mechanism by constructing a structural equation model.The results indicated that:1)rural homestead vacancy rates increased with distance from the village to the city.2)rural-settled farmers showed a low withdrawal intention for vacant rural homesteads,followed by urban and rural dual-residence farmers,and urban-settled farmers showed the highest withdrawal intention.3)the relative importance of the factors influencing withdrawal intention is in the following order:policy awareness>interest perception>living environment perception>family characteristics.Finally,this study discussed the reformation of the homestead system and rural homestead transition in Northeast China,which can provide policy support to increase the potential of cultivated land and promote sustainable rural development and urban-rural coordination.
文摘Exploring the relationship between social support and the mental health of cancer patients is a vital endeavor for enhancing mental well-being.The objective of this study was to explore the relationship between social support and psychological well-being in cancer patients and to provide new empirical evidence for psychological improvement in cancer patients.This research holds significant practical implications for optimizing China’s public health system and strengthening the development of a healthy China.Using data from the 2018 China Health and Retirement Longitudinal Study(CHARLS)database,we empirically examined the influence of social support on the mental health of cancer patients.Models such as Ordered Probit and OLogit were used to provide empirical evidence and theoretical insights for enhancing the mental health of cancer patients in a context marked by a high prevalence of cancer.The findings indicated that both formal and informal social support mechanisms were effective in improving the mental health of cancer patients.Furthermore,we utilized the propensity score matching(PSM)model to eliminate the endogeneity issue associated with sample selectivity bias.The results obtained through PSM demonstrated robustness,underscoring the importance of addressing sample selectivity bias when assessing the impact of social support on the mental health of cancer patients.Therefore,the Chinese government is recommended to prioritize the use of social support as a means to proactively enhance the mental health of cancer patients,thereby continuously elevating their overall quality of life.
基金supported by the Special Project of Global Space Remote Sensing Information Submission and Annual Report from the Ministry of Science and Technology(1061302600001)the National Natural Science Foundation of China(41871343)+1 种基金the Strategic Priority Research Program(A)of the Chinese Academy of Sciences(XDA23100201)the Second Tibetan Plateau Scientific Expedition(2019QZKK0608)。
文摘Humans deeply influence the urbanizing of earth’s surface system in an exacerbating manner across space and time[1].Around the globe,urban land-use/cover changes reflect the intensities of human activities and land shifts from nature or semi-nature lands to man-made–dominated surfaces[2].
基金supported by the Ministry of Education Humanities and Social Sciences Research Planning Fund Project of China(Grant No.24YJA630093)the National Natural Science Foundation of China(Grant No.71901068)the Science and Technology Innovation Special Fund Project of Fujian Agriculture and Forestry University(Grant No.KFB23166).
文摘This paper focuses on the economic resilience aspects of the financialization of infrastructure projects concerning enhancing market dynamics and risk regulation.We examined 39 infrastructure REITs listed in China between June 2021 and June 2024.Utilizing an economic resilience evaluation model to assess the resistance and recovery capacities of these infrastructure REITs,we incorporate seven investor heterogeneity measures.A geographic detector model is employed to analyze divergence,identify key determinant factors,pinpoint risk zones,and investigate the interaction between these measures within the context of PPP-REITs and DI-REITs.The empirical results show that the investor ratio and expected investment tenure are critical to the construction of economic resilience indices for infrastructure REITs.Also,the interaction of factors holds significance toward influencing the divergence in economic resilience.Our findings reveal a "barrel effect" of investor heterogeneity in infrastructure project financial products,indicating a consistency between economic resilience and investor heterogeneity.By integrating the investor heterogeneity index into the resilience evaluation framework of infrastructure REITs,this study offers valuable insights into the risk-resistance capacity of infrastructure financial products and the enhancement of economic resilience in these projects.
基金The Key Program of the National Social Science Foundation(24ASH010)。
文摘Different symbiotic scenarios were designed and combined with oyster shell pollution managementcases in two different counties(labeled A and H in this study)using symbiosis theory and a game simulation modelto investigate the conditions for realizing multiparty symbiosis in oyster shell pollution management.The resultsshow that the primary condition for achieving a virtuous cycle of tripartite governance is active governance by thegovernment.To realize such tripartite governance,it is necessary to reduce the cost of government regulation andchange the government's concept and value orientation;to reduce the cost of social capital contracted for participation in governance to improve the sustainability of social capital in the case of governance participation;and thevillagers’public,as the destroyer of the environment and the beneficiary of governance,should change their traditional concept of governance.Changing the traditional concept of the villagers would improve the benefits that thevillagers can obtain by participating in governance,and this should be supplemented with corresponding rewardand punishment mechanisms to increase the cost of the villagers’choice not to participate.If the conditions listedabove are met,the system will enter a virtuous cycle of tripartite governance.Based on this,we hope to seek asustainable and replicable oyster shell pollution management path through the experiences of oyster shell pollutionmanagement in both A County and H County,so that we can better promote the rural revitalization strategy andrealize the construction of a beautiful China.
基金The Chinese Academy of Sciences Strategic Pilot Science and Technology Special Sub-Project(XDA28130402)The Doctoral Postdoctoral Funding Project in Heilongjiang Province(LBH-Z23074)。
文摘The revitalization of rural culture serves as the driving force and intellectual backbone for the overallresurgence of rural areas.Guided by the core values of socialism,this study delves into the exploration of effectivemethods for the transformation of the agricultural cultural heritage of ethnic minorities.This endeavor is not only ofimmediate importance in achieving the revival of rural culture but also plays a crucial role in supporting the development of agricultural heritage industries and catalyzing entrepreneurship in returning to and establishing businesses in rural regions.This article adopts a broad perspective,analyzing the current development status of theagricultural heritage of ethnic minorities in Heilongjiang.Through a thorough examination,it dissects the opportunities and challenges encountered in the creative transformation of this cultural heritage and endeavors to uncovereffective strategies within the broader context of the rural revitalization strategy.The findings of this study indicatethat there are some problems in the agricultural cultural heritage of ethnic minorities in Heilongjiang Province,suchas insufficient excavation,weak synergistic development of agricultural culture and industry,and low integration.Itis essential to construct a comprehensive agricultural heritage system for each ethnic minority in HeilongjiangProvince.Furthermore,a combination of diverse approaches must be employed to strengthen the inheritance andutilization of agricultural cultural heritage.
基金supported by Second Tibetan Plateau Scientific Expedition and Research Program(STEP)-‘Dynamic monitoring and simulation of water cycle in Asian water tower area’[grant number 2019QZKK0206]Open Fund of the State Key Laboratory of Remote Sensing Science[grant number OFSLRSS202201]+1 种基金Ningxia Science and Technology Department Flexible Introduction talent project[grant number 2021RXTDLX14]Fengyun Application Pioneering Project[grant number FY-APP-2022.0205].
文摘Accurate predictions of sea surface temperature(SST)are crucial due to the significant impact of SST on the global ocean-atmospheric system and its potential to trigger extreme weather events.Many existing machine-learning-based ssT predictions adapt the traditional iterative point-wise prediction mechanism,whose predicting horizons and accuracy are limited owing to the high sensitivity to cumulative errors during iterative predictions.Therefore,this paper proposes a novel granulation-based long short-term memory(LsTM)-random forest(RF)combination model that can fully capture the feature dependencies involved in the fluctuation of SsT sequences,reduce the cumulative error in the iteration process,and extend the prediction horizons,which includes two sub-models(adaptive granulation model and hybrid prediction model).They can restack the one-dimensional ssT time-series into multidimensional feature variables,and achieve a strong forecasting ability.The analysis shows that the proposed model can achieve more accurate prediction-hours in nearly all prediction ranges from 1 to 125 h.The average prediction error of the proposed model in 25-125 h is 0.07 K,similar to that(0.067 K)in the first 24 h,which exhibits a high generalization performance and robustness and isthus a promising platform for the medium-and long-term forecasting of hourly SSTs.
