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环境激励下ERA方法在砌体结构振动测试中的应用研究
环境激励 ERA 砌体结构 振动测试
2018/12/29
ERA方法是基于环境激励的结构振动测试的方法中重要的时域分析方法。主要由ERA算法对齐齐哈尔砌体结构居民房的基本模态参数进行测试。简述了ERA算法的主要思路和计算过程，介绍了相应的模态识别准则MAC，以及ERA算法在MATLAB中的实现。由ERA算法得到的模态参数与有限元建模分析结果分析比较吻合，为砌体结构在环境激励下用ERA方法测试模态参数提供了实验依据。最后，讨论了ERA方法与有限元建模分析结...
China's Global Shipping Connectivity: Internal and External Dynamics in the Contemporary Era (1890-2016)
China connectivity maritime network port system vessel movements
2018/4/3
China's global shipping connectivity had been somewhat overlooked as the bulk of related studies predominantly focused on the throughput volume of its own port cities. This article tackles such lacuna...
ERA-PLANET THE EUROPEAN NETWORK FOR OBSERVING OUR CHANGING PLANET
Earth observation in-situ policy interoperability
2016/12/1
In the last decade a significant number of projects and programmes in different domains of Earth Observation and environmental monitoring have generated a substantial amount of data and knowledge on d...
基于时域缩放ERA方法的工作模态辨识技术
模态辨识 时域缩放 ERA 工作模态
2017/8/14
研究了基于时域缩放选带，使用振动模态特征系统实现算法（eigensystem realization algorithm，ERA）的工作模态辨识技术。分析了ERA环境激励模态辨识方法的理论，给出了时域缩放选带技术和真实模态挑选技术的方法以及工作流程。通过算例研究了采用时域缩放技术的ERA工作模态辨识方法。研究结果表明：使用该方法可以有效地辨识出结构的模态，且可以采用滑动时间窗的方法获得模态随时间的...
A new era of highly miniaturized space technologies, allowing to develop high performing, light and affordable earth observation missions
highly miniaturized space technologies affordable earth observation missions
2015/9/1
For many years Alcatel Alenia Space has been developing multi -mission concept of satellites for Low Earth Orbit (LEO) scientific or observation applicatio ns. These developments led to seve ral famil...
Socio-economic and ecological transformations of the peri-urban region of Gurgaon: an analysis of the trickle-down effect in the post globalization era
Urbanization Globalization Socio-economic development Trickle-down effect Poverty and Vulnerability Land use land cover change
2014/12/16
Economic processes are a manifestation of dynamic complex interdependent array of factors which involves resources, technology and an acting innovative human mind. Production, growth and development a...
采用中国陆域1989年-2009年3小时0.71°格点的ERA-Interim地表2 m气温预报数据，运用累积分布函数与分位数对研究区的极端低温和极端高温进行分析。结果表明：东北、青藏高原及西北地区为极端低温的集聚区，极端低温逐步沿西北-东南方向递增；青藏高原为全国极端高温中的唯一冷中心，西北盆地为最热中心；ERA-Interim再分析资料能够较好地反映中国极端低温和极端高温空间分布规律，整体上具...
基于SCI/ERA方法的高效气动力降阶模型
降阶模型 单信号-复合-输入/特征系统实现算法 平衡特征正交分解 二次降阶
2014/5/20
由正交Walsh函数构造Walsh-单信号-复合-输入,对其作用下的计算流体力学响应采用单信号-复合-输入/特征系统实现算法SCI/ERA(Single-Composite-Input/Eigensystem Realization Algorithm)辨识得到离散时间非定常气动力状态空间降阶模型。通过对Isogai机翼剖面气动弹性算例的计算证明该方法具有和非定常计算流体力学方法相当的精度同时模型...
由正交Walsh函数构造Walsh-单信号-复合-输入,对其作用下的计算流体力学响应采用单信号-复合-输入/特征系统实现算法SCI/ERA(Single-Composite-Input/Eigensystem Realization Algorithm)辨识得到离散时间非定常气动力状态空间降阶模型。通过对Isogai机翼剖面气动弹性算例的计算证明该方法具有和非定常计算流体力学方法相当的精度同时模型...
REMOTE SENSING AT YOUR COURTYARD – A NEW ERA OF PRIVACY
Remote Sensing GPS Development Integration Interpretation Monitoring
2014/6/19
"Google Earth" and other similar services became a part of our everyday life. For the public they are the preferred mediums to
acquire spatial information. Common positioning tools like GPS, became ...
A Citation Analysis of Australian Information Systems Researchers: Towards a New ERA?
Citation Analysis Australian Information Systems ERA
2009/12/9
Citation analysis is a potentially valuable means of assessing the contributions of researchers, in Information Systems (IS) as in other disciplines. In particular, a combination of raw counts and dee...
Paying for Transit in an Era of Federal Policy Change
Paying Transit Federal Policy Change
2009/10/19
Public transit agencies rely on a combination of local, state, and federal subsidies to
provide their services. However, federal policy changes have introduced uncertainty
into the public subsidy pi...
The diversification of energy source in the new era
Diversification energy source industrial organization WTI crude oil prices responsibility to international oil situations
2009/5/7
I will give you the speech regarding “The diversification of energy source in the new era”. I teach natural resource & energy and industrial organization in Wako University. Both lectures are deeply ...
Gene Function and Expression: Four Years of the Post-genomic Era of Yeast
gene expression gene function genomics
2009/3/23
The yeast Saccharomyces cerevisae is a key model organism in which eukaryotic cell architecture and fundamental cellular mechanisms can be successfully investigated. The yeast genome sequence programm...