Natural disasters are not negligible factors that have significant impacts on a country’s development. Madagascar cannot escape cyclones, floods and drought due to its geographical situation. The objective in this wo...Natural disasters are not negligible factors that have significant impacts on a country’s development. Madagascar cannot escape cyclones, floods and drought due to its geographical situation. The objective in this work is to assess the risks and vulnerability to these hazards in order to strengthen the resilience of the Malagasy population. Our approach is based on multi-criteria spatial analysis using the Analytical Hierarchy Process (AHP). The results form decision spatial information that can be used at the strategic level of natural risk and disaster management. This work focuses on the degree of vulnerability and it was found in this study that the Androy and Atsimo-Atsinanana regions are the most vulnerable to major hazards in Madagascar not only because of their exposure to risk but also because of their very low socio-economic status.展开更多
在胡同里修建感应道路、把巨大的天安门广场变成人民公园、把鸟巢用一座小型景山覆盖掉,在CBD上空竖起一座巨大的悬浮综合体,马岩松领衔的MAD事务所把对2050年北京的疯狂想象带到了威尼斯DIOCESI博物馆。在那里,一个名为"MAD IN CH...在胡同里修建感应道路、把巨大的天安门广场变成人民公园、把鸟巢用一座小型景山覆盖掉,在CBD上空竖起一座巨大的悬浮综合体,马岩松领衔的MAD事务所把对2050年北京的疯狂想象带到了威尼斯DIOCESI博物馆。在那里,一个名为"MAD IN CHINA……一个关于未来的实践"的个展与威尼斯建筑双年展同期举行,双年展策展人Richard Burdett看过后也由衷地评论道,"MAD以独立实践的方式出现在威尼斯是中国开始多元对话的标志,‘北京2050’将国际评论界对中国的关注点引向了未来,而不再仅仅是过去。"……31岁的马岩松在继获得第一个国际大型建筑设计权(梦露大厦)后又一次放肆地笑了。展开更多
The global increase in life expectancy poses challenges related to the safety and well-being of the elderly population,especially in relation to falls.While falls can lead to significant cognitive impairments,timely i...The global increase in life expectancy poses challenges related to the safety and well-being of the elderly population,especially in relation to falls.While falls can lead to significant cognitive impairments,timely intervention can mitigate their adverse effects.In this context,the need for non-invasive,efficient monitoring systems becomes paramount.Although wearable sensors have gained traction for monitoring health activities,they may cause discomfort during prolonged use,especially for the elderly.To address this issue,we present an intelligent,non-invasive Software-Defined Radio Frequency(SDRF)sensing system,tailored red for monitoring elderly people’s falls during routine activities.Harnessing the power of deep learning and machine learning,our system processes the Wireless Channel State Information(WCSI)generated during regular and fall activities.By employing sophisticated signal processing techniques,the system captures unique patterns that distinguish falls from normal activities.In addition,we use statistical features to streamline data processing,thereby optimizing the computational efficiency of the system.Our experiments,conducted for a typical home environment while using treadmill,demonstrate the robustness of the system.The results show high classification accuracies of 92.5%,95.1%,and 99.8%for three Artificial Intelligence(AI)algorithms.Notably,the SDRF-based approach offers flexibility,cost-effectiveness,and adaptability through software modifications,circumventing the need for hardware overhaul.This research attempts to bridge the gap in RF-based sensing for elderly fall monitoring,providing a solution that combines the benefits of non-invasiveness with the precision of deep learning and machine learning.展开更多
Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithiumion batteries(LIBs)due to their good stability,safety,cost-effectiveness,suitable voltages,and minimal env...Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithiumion batteries(LIBs)due to their good stability,safety,cost-effectiveness,suitable voltages,and minimal environmental impact.However,these materials suffer from poor rate capability and low-temperature performance owing to limited electronic and ionic conductivity,which restricts their practical applicability.Recent developments,such as coating material particles with carbon or a conductive polymer,crystal deformation through the doping of foreign metal ions,and the production of nanostructured materials,have significantly enhanced the electrochemical performances of these materials.The successful applications of polyanion-based materials,especially in lithium-ion batteries,have been extensively reported.This comprehensive review discusses the current progress in crystal deformation in polyanion-based cathode materials,including phosphates,fluorophosphates,pyrophosphates,borates,silicates,sulfates,fluorosilicates,and oxalates.Therefore,this review provides detailed discussions on their synthesis strategies,electrochemical performance,and the doping of various ions.展开更多
文摘Natural disasters are not negligible factors that have significant impacts on a country’s development. Madagascar cannot escape cyclones, floods and drought due to its geographical situation. The objective in this work is to assess the risks and vulnerability to these hazards in order to strengthen the resilience of the Malagasy population. Our approach is based on multi-criteria spatial analysis using the Analytical Hierarchy Process (AHP). The results form decision spatial information that can be used at the strategic level of natural risk and disaster management. This work focuses on the degree of vulnerability and it was found in this study that the Androy and Atsimo-Atsinanana regions are the most vulnerable to major hazards in Madagascar not only because of their exposure to risk but also because of their very low socio-economic status.
文摘在胡同里修建感应道路、把巨大的天安门广场变成人民公园、把鸟巢用一座小型景山覆盖掉,在CBD上空竖起一座巨大的悬浮综合体,马岩松领衔的MAD事务所把对2050年北京的疯狂想象带到了威尼斯DIOCESI博物馆。在那里,一个名为"MAD IN CHINA……一个关于未来的实践"的个展与威尼斯建筑双年展同期举行,双年展策展人Richard Burdett看过后也由衷地评论道,"MAD以独立实践的方式出现在威尼斯是中国开始多元对话的标志,‘北京2050’将国际评论界对中国的关注点引向了未来,而不再仅仅是过去。"……31岁的马岩松在继获得第一个国际大型建筑设计权(梦露大厦)后又一次放肆地笑了。
基金supported in part by the Institute of Advanced Technology,University of Science and Technology of China (USTC) under Grant PF02023001Ythe Zayed Health Center at United Arab Emirates University (UAEU) under Grant G00003476COMSATS University Islamabad,Attock Campus。
文摘The global increase in life expectancy poses challenges related to the safety and well-being of the elderly population,especially in relation to falls.While falls can lead to significant cognitive impairments,timely intervention can mitigate their adverse effects.In this context,the need for non-invasive,efficient monitoring systems becomes paramount.Although wearable sensors have gained traction for monitoring health activities,they may cause discomfort during prolonged use,especially for the elderly.To address this issue,we present an intelligent,non-invasive Software-Defined Radio Frequency(SDRF)sensing system,tailored red for monitoring elderly people’s falls during routine activities.Harnessing the power of deep learning and machine learning,our system processes the Wireless Channel State Information(WCSI)generated during regular and fall activities.By employing sophisticated signal processing techniques,the system captures unique patterns that distinguish falls from normal activities.In addition,we use statistical features to streamline data processing,thereby optimizing the computational efficiency of the system.Our experiments,conducted for a typical home environment while using treadmill,demonstrate the robustness of the system.The results show high classification accuracies of 92.5%,95.1%,and 99.8%for three Artificial Intelligence(AI)algorithms.Notably,the SDRF-based approach offers flexibility,cost-effectiveness,and adaptability through software modifications,circumventing the need for hardware overhaul.This research attempts to bridge the gap in RF-based sensing for elderly fall monitoring,providing a solution that combines the benefits of non-invasiveness with the precision of deep learning and machine learning.
文摘Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithiumion batteries(LIBs)due to their good stability,safety,cost-effectiveness,suitable voltages,and minimal environmental impact.However,these materials suffer from poor rate capability and low-temperature performance owing to limited electronic and ionic conductivity,which restricts their practical applicability.Recent developments,such as coating material particles with carbon or a conductive polymer,crystal deformation through the doping of foreign metal ions,and the production of nanostructured materials,have significantly enhanced the electrochemical performances of these materials.The successful applications of polyanion-based materials,especially in lithium-ion batteries,have been extensively reported.This comprehensive review discusses the current progress in crystal deformation in polyanion-based cathode materials,including phosphates,fluorophosphates,pyrophosphates,borates,silicates,sulfates,fluorosilicates,and oxalates.Therefore,this review provides detailed discussions on their synthesis strategies,electrochemical performance,and the doping of various ions.
