This study investigated the influence factors on the seismic response and deformation modes of retaining walls using large-scale model shaking table tests. Experimental results showed that the distribution of peak sei...This study investigated the influence factors on the seismic response and deformation modes of retaining walls using large-scale model shaking table tests. Experimental results showed that the distribution of peak seismic earth pressures along the height of a wall was a single peak value curve. The seismic earth pressures on a gravel soil retaining wall were larger than the pressures on the weathered granite and quartz retaining walls. Also, the peak seismic earth pressure increased with increases in the peak ground acceleration and the wall height. The measured seismic active earth pressures on a rock foundation retaining wall were larger than the calculated values, and the action position of resultant seismic pressure was higher than 0.33 H. In the soil foundation retaining wall, the measured seismic earth pressures were much smaller than the calculated values, while the action position was slightly higher than 0.33 H. The soil foundation retaining wall suffered base sliding and overturning under earthquake conditions, while overturning was the main failure mode for the rock foundation retaining walls.展开更多
目的探讨应用健康行为过程取向(health action process approach,HAPA)理论的干预方案对减少老年心力衰竭(heart failure,HF)患者久坐行为的护理效果。方法2023年8-10月,便利抽样法选取江苏省某三级甲等医院心血管内科住院的老年HF患者...目的探讨应用健康行为过程取向(health action process approach,HAPA)理论的干预方案对减少老年心力衰竭(heart failure,HF)患者久坐行为的护理效果。方法2023年8-10月,便利抽样法选取江苏省某三级甲等医院心血管内科住院的老年HF患者为研究对象,根据病区,将心内科1病区设为对照组,5病区设为干预组,每组各36例;对照组给予常规健康教育,干预组在常规健康教育基础上实施基于HAPA理论的护理方案;分别于4个节点:干预前、出院后2周、1个月、3个月,比较两组久坐行为每日总时间和单次最长时间、每日总步数、步行速度以及自我效能的变化。结果干预组出院后1个月、3个月每日总时间和单次最长时间低于对照组,而每日总步数和自我效能评分均高于对照组,出院后3个月步行速度评分也高于对照组(均P<0.05)。结论基于HAPA理论的护理干预方案能减少老年HF患者久坐行为,同时提升患者活动自我效能。展开更多
近年来,随着监控摄像头的不断增多和互联网的迅速发展,监控视频与网络视频越来越多,对视频进行自动行为冲突检测对降低人为审核导致的隐私信息泄露风险及维护社会治安、净化网络环境等具有重要意义.为了充分提取视频中的行为冲突特征,...近年来,随着监控摄像头的不断增多和互联网的迅速发展,监控视频与网络视频越来越多,对视频进行自动行为冲突检测对降低人为审核导致的隐私信息泄露风险及维护社会治安、净化网络环境等具有重要意义.为了充分提取视频中的行为冲突特征,并获得有较好泛化能力与检测效果的模型,采用I3D(inflated 3D convolutional network)与VGGish,基于XD-Violence进行多模态特征的提取,并提出了基于Transformer和图卷积网络的行为冲突检测模型TG-BCDM(behavior conflict detection model based on Transformer and graph convolution networks).该模型包含Transformer编码器模块和图卷积模块,可以在有效捕捉视频中长距离依赖关系的同时,关注视频特征的全局信息和局部信息.经过实验证明,该模型优于现有的8种方法.展开更多
基金the National Program on Key Research Project of China (Grant No. 2016YFC0802206)the open research fund of MOE Key Laboratory of High-speed Railway Engineering,Southwest Jiaotong University and Doctoral Innovation Fund Program of Southwest University of Science and Technology (Grant No. 16zx7123)
文摘This study investigated the influence factors on the seismic response and deformation modes of retaining walls using large-scale model shaking table tests. Experimental results showed that the distribution of peak seismic earth pressures along the height of a wall was a single peak value curve. The seismic earth pressures on a gravel soil retaining wall were larger than the pressures on the weathered granite and quartz retaining walls. Also, the peak seismic earth pressure increased with increases in the peak ground acceleration and the wall height. The measured seismic active earth pressures on a rock foundation retaining wall were larger than the calculated values, and the action position of resultant seismic pressure was higher than 0.33 H. In the soil foundation retaining wall, the measured seismic earth pressures were much smaller than the calculated values, while the action position was slightly higher than 0.33 H. The soil foundation retaining wall suffered base sliding and overturning under earthquake conditions, while overturning was the main failure mode for the rock foundation retaining walls.
文摘目的探讨应用健康行为过程取向(health action process approach,HAPA)理论的干预方案对减少老年心力衰竭(heart failure,HF)患者久坐行为的护理效果。方法2023年8-10月,便利抽样法选取江苏省某三级甲等医院心血管内科住院的老年HF患者为研究对象,根据病区,将心内科1病区设为对照组,5病区设为干预组,每组各36例;对照组给予常规健康教育,干预组在常规健康教育基础上实施基于HAPA理论的护理方案;分别于4个节点:干预前、出院后2周、1个月、3个月,比较两组久坐行为每日总时间和单次最长时间、每日总步数、步行速度以及自我效能的变化。结果干预组出院后1个月、3个月每日总时间和单次最长时间低于对照组,而每日总步数和自我效能评分均高于对照组,出院后3个月步行速度评分也高于对照组(均P<0.05)。结论基于HAPA理论的护理干预方案能减少老年HF患者久坐行为,同时提升患者活动自我效能。
文摘近年来,随着监控摄像头的不断增多和互联网的迅速发展,监控视频与网络视频越来越多,对视频进行自动行为冲突检测对降低人为审核导致的隐私信息泄露风险及维护社会治安、净化网络环境等具有重要意义.为了充分提取视频中的行为冲突特征,并获得有较好泛化能力与检测效果的模型,采用I3D(inflated 3D convolutional network)与VGGish,基于XD-Violence进行多模态特征的提取,并提出了基于Transformer和图卷积网络的行为冲突检测模型TG-BCDM(behavior conflict detection model based on Transformer and graph convolution networks).该模型包含Transformer编码器模块和图卷积模块,可以在有效捕捉视频中长距离依赖关系的同时,关注视频特征的全局信息和局部信息.经过实验证明,该模型优于现有的8种方法.
