Understanding stakeholders’differences in perceptions of ecosystem services(ES)is crucial for guiding ecolog-ical conservation and planning.However,the variations of ES perception amongst different types of residents...Understanding stakeholders’differences in perceptions of ecosystem services(ES)is crucial for guiding ecolog-ical conservation and planning.However,the variations of ES perception amongst different types of residents in urbanizing areas along an urban-rural gradient are still poorly understood.Combining a questionnaire-based survey,redundancy analysis,and statistical tests,we delineated the urban-rural gradient according to local res-idents’socio-economic characteristics,and investigated the differences in local residents’perceptions of ES and potential factors affecting them in the Guanting Reservoir basin,a rapidly urbanizing basin in China.The results showed that residents living in urban-rural transitional areas attached great importance to provisioning services of providing food and domestic water,regulating services of carbon sequestration and air purification,and cul-tural services of providing education and training,which were 0.7%-13.1%,0.7%-9.1%and 2.5%-21.2%higher than that of residents in other areas,respectively.Age and occupation were major factors affecting residents’perceptions.In terms of land-use types that deliver ES,the difference in perceptions of ES delivered by grassland was the greatest amongst residents.Our results support recommendations for policymakers to take into account the stakeholders’diverse perceptions,thus promoting residents’sense of gain on ES.展开更多
Many studies on the diagnosis for machines have become important recently because of increased use of various complex industrial systems.The correlation information between sound and vibration is very important for ma...Many studies on the diagnosis for machines have become important recently because of increased use of various complex industrial systems.The correlation information between sound and vibration is very important for machine diagnosis.Usually,vibration pickups are attached directly to the machine in order to measure vibration data.However,in some cases,the sensors can not be attached directly on highly precise devices.In this study,a method to estimate the fluctuation of sound and vibration is proposed based on the measurement data of sound emitted from the machine under existence of background noise.The effectiveness of the proposed theory is experimentally confirmed by applying it to the observed data emitted from a rotational machine driven by an electric motor.展开更多
Urban metabolism provides a robust framework for analyzing urban development and its impacts.However,several conceptual and operational shortcomings have constrained the application of urban metabolism in understandin...Urban metabolism provides a robust framework for analyzing urban development and its impacts.However,several conceptual and operational shortcomings have constrained the application of urban metabolism in understanding the overall urban processes,limiting the transfer of its potential benefits to design and planning.This article systematically analysed the rationale of the current urban metabolism models,focusing on four prevailing shortcomings from a transdisciplinary perspective:1)utilizing an isolated state approach,which treats urban systems as isolated from other ecosystems;2)ignoring internal processes within urban systems,known as the black box paradox;3)employing a linear material approach that focuses on the path of single materials;and 4)overlooking the material productivity of urban systems,where energy and materials entering the system are used to reproduce the urban material structure and generate goods and tradable products.While these issues have been identified individually in existing scientific literature,there is a lack of holistic solutions.This article proposes an enhanced urban metabolism analytical approachDthe ecosystem approach applying atechnomassoDto address these shortcomings and provide practical solutions in landscape architecture and planning disciplines for sustainable urban development.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.42361144859)Beijing Nova Pro-gram(Grant No.20220484163)Beijing Normal University Tang Scholar.
文摘Understanding stakeholders’differences in perceptions of ecosystem services(ES)is crucial for guiding ecolog-ical conservation and planning.However,the variations of ES perception amongst different types of residents in urbanizing areas along an urban-rural gradient are still poorly understood.Combining a questionnaire-based survey,redundancy analysis,and statistical tests,we delineated the urban-rural gradient according to local res-idents’socio-economic characteristics,and investigated the differences in local residents’perceptions of ES and potential factors affecting them in the Guanting Reservoir basin,a rapidly urbanizing basin in China.The results showed that residents living in urban-rural transitional areas attached great importance to provisioning services of providing food and domestic water,regulating services of carbon sequestration and air purification,and cul-tural services of providing education and training,which were 0.7%-13.1%,0.7%-9.1%and 2.5%-21.2%higher than that of residents in other areas,respectively.Age and occupation were major factors affecting residents’perceptions.In terms of land-use types that deliver ES,the difference in perceptions of ES delivered by grassland was the greatest amongst residents.Our results support recommendations for policymakers to take into account the stakeholders’diverse perceptions,thus promoting residents’sense of gain on ES.
文摘Many studies on the diagnosis for machines have become important recently because of increased use of various complex industrial systems.The correlation information between sound and vibration is very important for machine diagnosis.Usually,vibration pickups are attached directly to the machine in order to measure vibration data.However,in some cases,the sensors can not be attached directly on highly precise devices.In this study,a method to estimate the fluctuation of sound and vibration is proposed based on the measurement data of sound emitted from the machine under existence of background noise.The effectiveness of the proposed theory is experimentally confirmed by applying it to the observed data emitted from a rotational machine driven by an electric motor.
文摘Urban metabolism provides a robust framework for analyzing urban development and its impacts.However,several conceptual and operational shortcomings have constrained the application of urban metabolism in understanding the overall urban processes,limiting the transfer of its potential benefits to design and planning.This article systematically analysed the rationale of the current urban metabolism models,focusing on four prevailing shortcomings from a transdisciplinary perspective:1)utilizing an isolated state approach,which treats urban systems as isolated from other ecosystems;2)ignoring internal processes within urban systems,known as the black box paradox;3)employing a linear material approach that focuses on the path of single materials;and 4)overlooking the material productivity of urban systems,where energy and materials entering the system are used to reproduce the urban material structure and generate goods and tradable products.While these issues have been identified individually in existing scientific literature,there is a lack of holistic solutions.This article proposes an enhanced urban metabolism analytical approachDthe ecosystem approach applying atechnomassoDto address these shortcomings and provide practical solutions in landscape architecture and planning disciplines for sustainable urban development.
