检索范围:
排序: 展示方式:
Novel quantum-inspired firefly algorithm for optimal power quality monitor placement
Ling Ai WONG,Hussain SHAREEF,Azah MOHAMED,Ahmad Asrul IBRAHIM
《能源前沿(英文)》 2014年 第8卷 第2期 页码 254-260 doi: 10.1007/s11708-014-0302-1
关键词: quantum-inspired binary firefly algorithm topological monitor reach area power quality
IDEEA activity monitor: validity of activity recognition for lying, reclining, sitting and standing
null
《医学前沿(英文)》 2013年 第7卷 第1期 页码 126-131 doi: 10.1007/s11684-012-0236-0
Recent evidence demonstrates the independent negative effects of sedentary behavior on health, but there are few objective measures of sedentary behavior. Most instruments measure physical activity and are not validated as measures of sedentary behavior. The purpose of this study was to evaluate the validity of the IDEEA system’s measures of sedentary and low-intensity physical activities: lying, reclining, sitting and standing. Thirty subjects, 14 men and 16 women, aged 23 to 77 years, body mass index (BMI) between 18 to 34 kg/m2, participated in the study. IDEEA measures were compared to direct observation for 27 activities: 10 lying in bed, 3 lying on a sofa, 1 reclining in a lawn chair, 10 sitting and 3 standing. Two measures are reported, the percentage of activities accurately identified and the percentage of monitored time that was accurately labeled by the IDEEA system for all subjects. A total of 91.6% of all observed activities were accurately identified and 92.4% of the total monitored time was accurately labeled. The IDEEA system did not accurately differentiate between lying and reclining so the two activities were combined for calculating accuracy. Using this approach the IDEEA system accurately identified 96% of sitting activities for a total of 97% of the monitored sitting time, 99% and 99% for standing, 87% and 88% for lying in bed, 87% and 88% for lying on the sofa, and 83% and 83% for reclining on a lawn chair. We conclude that the IDEEA system accurately recognizes sitting and standing positions, but it is less accurate in identifying lying and reclining positions. We recommend combining the lying and reclining activities to improve accuracy. The IDEEA system enables researchers to monitor lying, reclining, sitting and standing with a reasonable level of accuracy and has the potential to advance the science of sedentary behaviors and low-intensity physical activities.
Mortarless structures based on topological interlocking
Arcady V. DYSKIN, Elena PASTERNAK, Yuri ESTRIN
《结构与土木工程前沿(英文)》 2012年 第6卷 第2期 页码 188-197 doi: 10.1007/s11709-012-0156-8
关键词: topological interlocking fragmented structures segmented structures constraint delamination bending stiffness
葛家理,胡机豪,张宏民
《中国工程科学》 2002年 第4卷 第1期 页码 75-80
对影响石油经济安全的十个潜在要素及国内国际石油经济安全的总体态势进行了分析,提出了石油经济安全的四个新特征及相应的"发展的安全观"理论。运用复杂性科学的理论对石油经济安全系统进行了分析,提出了"机遇控制论"的基本思想,通过综合集成建立了石油经济安全的主指标体系,确定了其安全界限,并编制了实用的石油经济安全数据库系统和预警监测系统软件,大大节约了安全决策的时间和成本。
沈慰安,梁恒昌,赵光思
《中国工程科学》 2012年 第14卷 第2期 页码 45-48
随着立井建设深度的增加,井壁不安全性及施工难度逐渐增加,为确保立井井壁安全、吊桶运行安全及施工过程安全,需要实时掌握井壁的受力状态及监测施工过程,信息化监测是保证工程施工安全的重要措施和基本前提。基于本溪大台沟铁矿直径6.5 m、井深1 640 m的超深立井井筒施工背景,在阐述目前超深立井建设过程存在的井壁安全、吊盘安全、施工实时安全等问题的基础上,提出了凿井施工过程视频监控系统、吊盘关键点荷载监控系统、提升吊桶运行监控系统的信息化集成方案,以达到实时掌握井壁安全及施工安全的目的,监测方案的实施可为深立井安全高效施工提供技术依据。
刘新,李成名,刘文宝
《中国工程科学》 2013年 第15卷 第5期 页码 8-13
空间关系描述了地理信息系统(GIS)中实体间的位置、距离、方位、拓扑等的度量。为提高空间关系描述的惟一性和空间关系推理的准确性,将拓扑关系与方向关系集成描述,构建拓扑方向关系的描述表达模型。目标对象与参照物在X、Y、Z 3个坐标轴上投影间的Allen区间关系分别为[R1]、[R2]和[R3],提出利用Allen区间关系对[(R1,R2,R3)]描述三维拓扑方向区域,用定义法研究拓扑方向关系定性推理,通过一些典型例子说明拓扑方向关系推理过程和结果,推理结果用组合推理表表示。
Zixin ZHANG, Jia WU, Xin HUANG
《结构与土木工程前沿(英文)》 2017年 第11卷 第2期 页码 187-208 doi: 10.1007/s11709-017-0391-0
关键词: morphology block assembling vertex operation discontinuities
《化学科学与工程前沿(英文)》 2023年 第17卷 第11期 页码 1755-1764 doi: 10.1007/s11705-023-2318-8
关键词: oxygen evolution reaction porous carbon nanosheets Co nanoparticles edge-induced topological defects Zn–air batteries
何贤强,潘德炉,黄二辉,赵艳玲
《中国工程科学》 2004年 第6卷 第9期 页码 33-37
传统的海水透明度监测方法是利用船舶等进行实测。由于船测本身固有的缺点,满足不了当前对海洋要素大范围、快速、实时监测的需求,必须结合卫星、航空遥感等手段,进行立体监测。文章以海水透明度为突破口,开展中国海透明度的卫星遥感监测。结果表明,利用卫星遥感技术反演海水透明度精度可以达到相对平均误差22.6%,在中高透明度海区,具有更高的反演精度。利用建立的海水透明度遥感反演算法和SeaWiFS卫星遥感数据,制作了两年的中国海透明度遥感产品数据集,并利用该产品,对中国海透明度的时空变化规律进行了遥感分析。
Virtual network embedding based on real-time topological attributes
Jian DING,Tao HUANG,Jiang LIU,Yun-jie LIU
《信息与电子工程前沿(英文)》 2015年 第16卷 第2期 页码 109-118 doi: 10.1631/FITEE.1400147
关键词: Virtual network embedding (VNE) Real-time topological attributes Betweenness centrality Correlation properties Network virtualization
Lin LUO, Zhongjing WANG
《环境科学与工程前沿(英文)》 2013年 第7卷 第5期 页码 756-768 doi: 10.1007/s11783-013-0563-7
关键词: precipitation intensity Mann-Kendall rank statistic spatial and temporal distribution climatic change
《化学科学与工程前沿(英文)》 2022年 第16卷 第1期 页码 92-102 doi: 10.1007/s11705-021-2063-9
关键词: hydrolysis reaction mitochondrial DNA damage in situ hydrophobic environment trigger fluorescence probe apoptosis
Shuaian WANG, Lu ZHEN, Harilaos N. PSARAFTIS
《工程管理前沿(英文)》 2021年 第8卷 第2期 页码 310-311 doi: 10.1007/s42524-020-0096-2
标题 作者 时间 类型 操作
Novel quantum-inspired firefly algorithm for optimal power quality monitor placement
Ling Ai WONG,Hussain SHAREEF,Azah MOHAMED,Ahmad Asrul IBRAHIM
期刊论文
IDEEA activity monitor: validity of activity recognition for lying, reclining, sitting and standing
null
期刊论文
Mortarless structures based on topological interlocking
Arcady V. DYSKIN, Elena PASTERNAK, Yuri ESTRIN
期刊论文
Application of a vertex chain operation algorithm on topological analysis of three-dimensional fractured
Zixin ZHANG, Jia WU, Xin HUANG
期刊论文
“Charging” the cigarette butt: heteroatomic porous carbon nanosheets with edge-induced topological defects
期刊论文
Virtual network embedding based on real-time topological attributes
Jian DING,Tao HUANG,Jiang LIU,Yun-jie LIU
期刊论文
Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the
Lin LUO, Zhongjing WANG
期刊论文
hydrophobic environment triggering reactive fluorescence probe to real-time monitor mitochondrial DNA
期刊论文
Three potential benefits of the EU and IMO’s landmark efforts to monitor carbon dioxide emissions from
Shuaian WANG, Lu ZHEN, Harilaos N. PSARAFTIS
期刊论文