Forest carbon sinks are crucial for mitigating urban climate change.Their effectiveness depends on the balance between gross carbon losses and gains.However,quantitative and continuous monitoring of forest change/dist...Forest carbon sinks are crucial for mitigating urban climate change.Their effectiveness depends on the balance between gross carbon losses and gains.However,quantitative and continuous monitoring of forest change/disturbance carbon fluxes is still insufficient.To address this gap,we integrated an improved spatial carbon bookkeeping(SBK)model with the continuous change detection and classification(CCDC)algorithm,long-term Landsat observations,and ground measurements to track carbon emissions,uptakes,and net changes from forest cover changes in the Yangtze River Delta(YRD)of China from 2000 to 2020.The SBK model was refined by incorporating heterogeneous carbon response functions.Our results reveal that carbon emissions(-3.88 Tg C·year^(-1))were four times greater than carbon uptakes(0.93 Tg C·year^(-1))from forest cover changes in the YRD during 2000-2020,despite a net forest cover gain of 10.95×10^(4) ha.These findings indicate that the carbon effect per hectare of forest cover loss is approximately 4.5 times that of forest cover gain.The asymmetric carbon effect suggests that forest cover change may act as a carbon source even with net-zero or net-positive forest cover change.Furthermore,carbon uptakes from forest gains in the YRD during 2000-2020 could only offset 0.28% of energy-related carbon emissions from 2000 to 2019.Urban and agricultural expansions accounted for 37% and 10% of carbon emissions,respectively,while the Grain for Green Project contributed to 45% of carbon uptakes.Our findings underscore the necessity of understanding the asymmetric carbon effects of forest cover loss and gain to accurately assess the capacity of forest carbon sinks.展开更多
In this paper,the problem of 3-D steady heat conduction including the influenceof phase change on billets is turned into the 2-D transient problem by a suitable transformation technique. The effective specific heat ha...In this paper,the problem of 3-D steady heat conduction including the influenceof phase change on billets is turned into the 2-D transient problem by a suitable transformation technique. The effective specific heat has been employed to substitutefor the effect of the phase ceange.The computational formulation of finite element has been presented. And the careful disposal of the phase change region has also beengiven.展开更多
Purpose:This review aims to discuss the meaning of organizational change,change dynamics,and the current state of debates on organizational change in schools.The core purpose of this review is not only to restate the ...Purpose:This review aims to discuss the meaning of organizational change,change dynamics,and the current state of debates on organizational change in schools.The core purpose of this review is not only to restate the literature on organizational change in schools but also to challenge the current theoretical understanding of change in schools by rising the new perspectives on change in schools.Design/Approach/Methods:As part of this effort,we discuss the dominant perspectives of change,forces of change,and illustrate the interventions adopted by different school systems to deal with the need of change.Findings:The literature on change in schools suggests that,parallel to the change intervention in other organizational settings,largely fail.Falling short of intended goals in change interventions is not a simple methodological problem but rather an ontological issue of how we perceive change and organization.Parallel to the arguments in the literature,continuous change has been indicated as an alternative perspective to planned change.Finally,leadership has been indicated as a key driver of organizational change.Originality/Value:The review discusses applicability of continuous change and elaborate on alternative leadership approaches to guide continuous change in schools.展开更多
The gender-based patriarchy of the Huaxia people,consisting of family and state order,inner/outer distinction and gender-based hierarchy,took shape in the period of radical transformation when the Zhou dynasty replace...The gender-based patriarchy of the Huaxia people,consisting of family and state order,inner/outer distinction and gender-based hierarchy,took shape in the period of radical transformation when the Zhou dynasty replaced the Shang dynasty and reached maturity in the Han dynasty,which had been established in the wake of the radical transformation conducted by the Zhou and Qin dynasties.On the basis of the principles of male/female distinction and the integration of family and state,Western Zhou aristocrats abolished the state structure the inner and outer governance systems(nei/waifuzhi内外服制),carried on in part the main patrilineage and surname exogamy of the Shang dynasty,and established the Huaxia patriarchal system.During the Qin and Han dynasties,the patriarchal system evolved into family and state isomorphism characterized by power-sharing between the royal house and its officials and by a two-pronged kinship system in which the male line was inner and the female line was outer.The system thus evolved into the Huaxia gender-based patriarchy,which covered spatial spheres,division of responsibilities,the kinship system,values and ethics,and codes of daily interaction and conduct.The distinction between the inner and the outer was not only a core value of the gender-based patriarchy but also its operational strategy.It also engendered such inter-related sub-systems as human functions,ethics and gender and such philosophical systems as the unity of heaven and man and the cosmic binaries of yin-yang(阴阳)and qian-kun(乾坤).The constancy(经jing)/Expedience(权quan)and Continuity(因yin)/Change(变bian)of the gender-based patriarchy,the jing/quan at the heart of the basic system and governance strategy within its constraints jointly ensured the stability and dynamism of the gender-based patriarchy of the Huaxia people.展开更多
The ISE’s first congress took place about 20 years ago (Strasbourg 1990).This year the Journal of Ethnopharmacology,the official journal of the International Society
Introduction:As China’s population rapidly ages,concerns have emerged about whether increased longevity among older adults is accompanied by improvements in health status.Methods:This study analyzed data from the 201...Introduction:As China’s population rapidly ages,concerns have emerged about whether increased longevity among older adults is accompanied by improvements in health status.Methods:This study analyzed data from the 2010 and 2020 Chinese censuses to estimate healthy life expectancy(HLE)at age 60 and examined changes in urban-rural disparities and their driving factors.We applied the Sullivan method to estimate gender-and residence-specific HLE,while using the continuous change decomposition method to analyze how mortality and health status contributed to urban-rural differences.Results:Between 2010 and 2020,both the absolute years of HLE and its proportion of total life expectancy increased,with the urban-rural gap narrowing over time.However,the primary driver of urban-rural HLE disparities has shifted from mortality levels to health status,a pattern more pronounced among men.Decomposition analysis further reveals that compared to 2010,the key age groups contributing to urbanrural HLE disparities in 2020 have shifted to older ages,reflecting a transition in health inequalities as the population ages.These findings suggest that while HLE among China’s older population has improved,the nature of health inequalities is evolving.Conclusions:Future public health policies should place greater emphasis on addressing non-fatal health conditions,particularly in rural areas and among the oldest-old,by improving the accessibility and quality of health services to promote healthy aging and reduce urban-rural health disparities.展开更多
This study examined wetland trends in the St.Lawrence Seaway(~500,000 km^(2))in Canada over the past four decades.To this end,historical Landsat data within the Google Earth Engine(GEE)big geo data platform were proce...This study examined wetland trends in the St.Lawrence Seaway(~500,000 km^(2))in Canada over the past four decades.To this end,historical Landsat data within the Google Earth Engine(GEE)big geo data platform were processed.Reference samples were scrutinized using the Continuous Change Detection and Classification(CCDC)algorithm to identify spectrally unchanged samples.These spectrally unchanged samples were subsequently employed as training data within an object-based Random Forest(RF)model to generate wetland maps from 1984 to 2021.Subsequently,a change analysis was conducted to calculate the loss and gain of different wetland types.Overall,it was observed that approximately 45%(184,434 km^(2))and 55%(220,778 km^(2))of the entire study area are covered by wetland and non-wetland categories,respectively.It was also observed that 2.46%(12,495 km^(2))of the study area was changed during 40 years.Overall,there was a decline in the Bog and Fen classes,while the Marsh,Swamp,Forest,Grassland/Shrubland,Cropland,and Barren classes had an increase.Finally,the wetland gain and loss were 6,793 km^(2)and 5,701 km^(2),respectively.This study demonstrated that the use of Landsat data,along with advanced machine learning and GEE,could provide valuable assistance for wetland classification and change studies.展开更多
Wetlands provide vital ecological services for both humans and environment,necessitating continuous,refined and up-to-date mapping of wetlands for conservation and management.in this study,we developed an automated an...Wetlands provide vital ecological services for both humans and environment,necessitating continuous,refined and up-to-date mapping of wetlands for conservation and management.in this study,we developed an automated and refined wetland mapping framework integrating training sample migration method,supervised machine learning and knowledge-driven rules using Google Earth Engine(GEE)platform and open-source geospatial tools.We applied the framework to temporally dense Sentinel-1/2 imagery to produce annual refined wetland maps of the Dongting Lake Wetland(DLW)during 2015-2021.First,the continuous change detection(CCD)algorithm was utilized to migrate stable training samples.Then,annual 10 m preliminary land cover maps with 9 classes were produced using random forest algorithm and migrated samples.Ultimately,annual 10 m refined wetland maps were generated based on preliminary land cover maps via knowledge-driven rules from geometric features and available water-related inventories,with Overall Accuracy(OA)ranging from 81.82%(2015)to 93.84%(2020)and Kappa Coefficient(KC)between 0.73(2015)and 0.91(2020),demonstrating satisfactory performance and substantial potential for accurate,timely and type-refined wetland mapping.Our methodological framework allows rapid and accurate monitoring of wetland dynamics and could provide valuable information and methodological support for monitoring,conservation and sustainable development of wetland ecosystem.展开更多
This article studies the relationship between local society and social change in rural north China from the late Qing dynasty to the People's Republic of China period through the activity of"Zhuo huanggui&quo...This article studies the relationship between local society and social change in rural north China from the late Qing dynasty to the People's Republic of China period through the activity of"Zhuo huanggui"(literally,"Catching the Yellow Ghost")."Catching the Yellow Ghost"is a ritual activity in Guyi village,Wu'an county,Hebei province.According to villagers there,"Catching the Yellow Ghost"has been celebrated since the late Qing dynasty.However,due to political pressures in the 1950s,it was not until the 1980s that"Catching the Yellow Ghost"began to be revitalized.Since that time,"Catching the Yellow Ghost"has gained rapid popularity and fame in north China.Through the lens of the"Catching the Yellow Ghost"ritual,this article explores social transformation in China from the late 19th to the early 21st century.By analyzing the continuity and discontinuity of"Catching the Yellow Ghost,"this article offers a new understanding of the relationship between local society and social change in rural north China.展开更多
基金supported by the Natural Science Foundation of Zhejiang Province(No.ZCLQN25C0301)the National Key Research and Development Program of China(No.2016YFC0502700)the General Program of Education Department of Zhejiang(No.23056209-F).
文摘Forest carbon sinks are crucial for mitigating urban climate change.Their effectiveness depends on the balance between gross carbon losses and gains.However,quantitative and continuous monitoring of forest change/disturbance carbon fluxes is still insufficient.To address this gap,we integrated an improved spatial carbon bookkeeping(SBK)model with the continuous change detection and classification(CCDC)algorithm,long-term Landsat observations,and ground measurements to track carbon emissions,uptakes,and net changes from forest cover changes in the Yangtze River Delta(YRD)of China from 2000 to 2020.The SBK model was refined by incorporating heterogeneous carbon response functions.Our results reveal that carbon emissions(-3.88 Tg C·year^(-1))were four times greater than carbon uptakes(0.93 Tg C·year^(-1))from forest cover changes in the YRD during 2000-2020,despite a net forest cover gain of 10.95×10^(4) ha.These findings indicate that the carbon effect per hectare of forest cover loss is approximately 4.5 times that of forest cover gain.The asymmetric carbon effect suggests that forest cover change may act as a carbon source even with net-zero or net-positive forest cover change.Furthermore,carbon uptakes from forest gains in the YRD during 2000-2020 could only offset 0.28% of energy-related carbon emissions from 2000 to 2019.Urban and agricultural expansions accounted for 37% and 10% of carbon emissions,respectively,while the Grain for Green Project contributed to 45% of carbon uptakes.Our findings underscore the necessity of understanding the asymmetric carbon effects of forest cover loss and gain to accurately assess the capacity of forest carbon sinks.
文摘In this paper,the problem of 3-D steady heat conduction including the influenceof phase change on billets is turned into the 2-D transient problem by a suitable transformation technique. The effective specific heat has been employed to substitutefor the effect of the phase ceange.The computational formulation of finite element has been presented. And the careful disposal of the phase change region has also beengiven.
文摘Purpose:This review aims to discuss the meaning of organizational change,change dynamics,and the current state of debates on organizational change in schools.The core purpose of this review is not only to restate the literature on organizational change in schools but also to challenge the current theoretical understanding of change in schools by rising the new perspectives on change in schools.Design/Approach/Methods:As part of this effort,we discuss the dominant perspectives of change,forces of change,and illustrate the interventions adopted by different school systems to deal with the need of change.Findings:The literature on change in schools suggests that,parallel to the change intervention in other organizational settings,largely fail.Falling short of intended goals in change interventions is not a simple methodological problem but rather an ontological issue of how we perceive change and organization.Parallel to the arguments in the literature,continuous change has been indicated as an alternative perspective to planned change.Finally,leadership has been indicated as a key driver of organizational change.Originality/Value:The review discusses applicability of continuous change and elaborate on alternative leadership approaches to guide continuous change in schools.
文摘The gender-based patriarchy of the Huaxia people,consisting of family and state order,inner/outer distinction and gender-based hierarchy,took shape in the period of radical transformation when the Zhou dynasty replaced the Shang dynasty and reached maturity in the Han dynasty,which had been established in the wake of the radical transformation conducted by the Zhou and Qin dynasties.On the basis of the principles of male/female distinction and the integration of family and state,Western Zhou aristocrats abolished the state structure the inner and outer governance systems(nei/waifuzhi内外服制),carried on in part the main patrilineage and surname exogamy of the Shang dynasty,and established the Huaxia patriarchal system.During the Qin and Han dynasties,the patriarchal system evolved into family and state isomorphism characterized by power-sharing between the royal house and its officials and by a two-pronged kinship system in which the male line was inner and the female line was outer.The system thus evolved into the Huaxia gender-based patriarchy,which covered spatial spheres,division of responsibilities,the kinship system,values and ethics,and codes of daily interaction and conduct.The distinction between the inner and the outer was not only a core value of the gender-based patriarchy but also its operational strategy.It also engendered such inter-related sub-systems as human functions,ethics and gender and such philosophical systems as the unity of heaven and man and the cosmic binaries of yin-yang(阴阳)and qian-kun(乾坤).The constancy(经jing)/Expedience(权quan)and Continuity(因yin)/Change(变bian)of the gender-based patriarchy,the jing/quan at the heart of the basic system and governance strategy within its constraints jointly ensured the stability and dynamism of the gender-based patriarchy of the Huaxia people.
文摘The ISE’s first congress took place about 20 years ago (Strasbourg 1990).This year the Journal of Ethnopharmacology,the official journal of the International Society
基金Supported by the National Key Research and Development Program of China(2022YFC3600800)the China Postdoctoral Science Foundation(2024M760259)+1 种基金the Postdoctoral Fellowship Program of China Postdoctoral Science Foundation(GZC20240155,GZC20240134)the Beijing Social Science Fund(20SRC029).
文摘Introduction:As China’s population rapidly ages,concerns have emerged about whether increased longevity among older adults is accompanied by improvements in health status.Methods:This study analyzed data from the 2010 and 2020 Chinese censuses to estimate healthy life expectancy(HLE)at age 60 and examined changes in urban-rural disparities and their driving factors.We applied the Sullivan method to estimate gender-and residence-specific HLE,while using the continuous change decomposition method to analyze how mortality and health status contributed to urban-rural differences.Results:Between 2010 and 2020,both the absolute years of HLE and its proportion of total life expectancy increased,with the urban-rural gap narrowing over time.However,the primary driver of urban-rural HLE disparities has shifted from mortality levels to health status,a pattern more pronounced among men.Decomposition analysis further reveals that compared to 2010,the key age groups contributing to urbanrural HLE disparities in 2020 have shifted to older ages,reflecting a transition in health inequalities as the population ages.These findings suggest that while HLE among China’s older population has improved,the nature of health inequalities is evolving.Conclusions:Future public health policies should place greater emphasis on addressing non-fatal health conditions,particularly in rural areas and among the oldest-old,by improving the accessibility and quality of health services to promote healthy aging and reduce urban-rural health disparities.
文摘This study examined wetland trends in the St.Lawrence Seaway(~500,000 km^(2))in Canada over the past four decades.To this end,historical Landsat data within the Google Earth Engine(GEE)big geo data platform were processed.Reference samples were scrutinized using the Continuous Change Detection and Classification(CCDC)algorithm to identify spectrally unchanged samples.These spectrally unchanged samples were subsequently employed as training data within an object-based Random Forest(RF)model to generate wetland maps from 1984 to 2021.Subsequently,a change analysis was conducted to calculate the loss and gain of different wetland types.Overall,it was observed that approximately 45%(184,434 km^(2))and 55%(220,778 km^(2))of the entire study area are covered by wetland and non-wetland categories,respectively.It was also observed that 2.46%(12,495 km^(2))of the study area was changed during 40 years.Overall,there was a decline in the Bog and Fen classes,while the Marsh,Swamp,Forest,Grassland/Shrubland,Cropland,and Barren classes had an increase.Finally,the wetland gain and loss were 6,793 km^(2)and 5,701 km^(2),respectively.This study demonstrated that the use of Landsat data,along with advanced machine learning and GEE,could provide valuable assistance for wetland classification and change studies.
基金supported by the National Natural Science Foundation of China(grant numbers 42071393,U1901219 and U21A2022).
文摘Wetlands provide vital ecological services for both humans and environment,necessitating continuous,refined and up-to-date mapping of wetlands for conservation and management.in this study,we developed an automated and refined wetland mapping framework integrating training sample migration method,supervised machine learning and knowledge-driven rules using Google Earth Engine(GEE)platform and open-source geospatial tools.We applied the framework to temporally dense Sentinel-1/2 imagery to produce annual refined wetland maps of the Dongting Lake Wetland(DLW)during 2015-2021.First,the continuous change detection(CCD)algorithm was utilized to migrate stable training samples.Then,annual 10 m preliminary land cover maps with 9 classes were produced using random forest algorithm and migrated samples.Ultimately,annual 10 m refined wetland maps were generated based on preliminary land cover maps via knowledge-driven rules from geometric features and available water-related inventories,with Overall Accuracy(OA)ranging from 81.82%(2015)to 93.84%(2020)and Kappa Coefficient(KC)between 0.73(2015)and 0.91(2020),demonstrating satisfactory performance and substantial potential for accurate,timely and type-refined wetland mapping.Our methodological framework allows rapid and accurate monitoring of wetland dynamics and could provide valuable information and methodological support for monitoring,conservation and sustainable development of wetland ecosystem.
文摘This article studies the relationship between local society and social change in rural north China from the late Qing dynasty to the People's Republic of China period through the activity of"Zhuo huanggui"(literally,"Catching the Yellow Ghost")."Catching the Yellow Ghost"is a ritual activity in Guyi village,Wu'an county,Hebei province.According to villagers there,"Catching the Yellow Ghost"has been celebrated since the late Qing dynasty.However,due to political pressures in the 1950s,it was not until the 1980s that"Catching the Yellow Ghost"began to be revitalized.Since that time,"Catching the Yellow Ghost"has gained rapid popularity and fame in north China.Through the lens of the"Catching the Yellow Ghost"ritual,this article explores social transformation in China from the late 19th to the early 21st century.By analyzing the continuity and discontinuity of"Catching the Yellow Ghost,"this article offers a new understanding of the relationship between local society and social change in rural north China.
