To enable the experimental assessment of the seismic performance of full-scale nonstructural elements with multiple engineering parameters(EDPs),a three-layer testbed named Nonstructural Element Simulator on Shake Tab...To enable the experimental assessment of the seismic performance of full-scale nonstructural elements with multiple engineering parameters(EDPs),a three-layer testbed named Nonstructural Element Simulator on Shake Table(NEST)has been developed.The testbed consists of three consecutive floors of steel structure.The bottom two floors provide a space to accommodate a full-scale room.To fully explore the flexibility of NEST,we propose a novel control strategy to generate the required shake table input time histories for the testbed to track the target floor motions of the buildings of interest with high accuracy.The control strategy contains two parts:an inverse dynamic compensation via simulation of feedback control systems(IDCS)algorithm and an offline iteration procedure based on a refined nonlinear numerical model of the testbed.The key aspects of the control strategy were introduced in this paper.Experimental tests were conducted to simulate the seismic responses of a full-scale office room on the 21^(st)floor of a 42-story high-rise building.The test results show that the proposed control strategy can reproduce the target floor motions of the building of interest with less than 20%errors within the specified frequency range.展开更多
作为新一代信息技术的突出代表,数据中心(IDC,Internet Data Center)承载着海量数据,为互联网数据交换、计算分析、存储共享等提供算力服务的物理载体,是数字化发展的关键基础设施。当前,5G、AI、物联网、大数据等技术不断向各行各业渗...作为新一代信息技术的突出代表,数据中心(IDC,Internet Data Center)承载着海量数据,为互联网数据交换、计算分析、存储共享等提供算力服务的物理载体,是数字化发展的关键基础设施。当前,5G、AI、物联网、大数据等技术不断向各行各业渗透发展,带动新场景、新应用的内容不断丰富,行业数据量的需求快速增长,数据中心产业的新一轮快速发展迎来新的机遇。展开更多
互联网数据中心(Internet Data Center,IDC)网络系统在目前的各个行业领域中出现频率已经逐渐升高,业界对于该网络系统的安全特性关注度也相对较高。IDC网络安全问题繁多,对于整个行业的快速发展是一种阻碍。基于此,文章介绍IDC网络及...互联网数据中心(Internet Data Center,IDC)网络系统在目前的各个行业领域中出现频率已经逐渐升高,业界对于该网络系统的安全特性关注度也相对较高。IDC网络安全问题繁多,对于整个行业的快速发展是一种阻碍。基于此,文章介绍IDC网络及其安全特性表现,分析其所存在的安全问题,并研究相应处理技术,证明IDC网络系统安全问题处理与防护优化的重要价值。展开更多
基金supported by the Natural Science Foundation of China(52122811)。
文摘To enable the experimental assessment of the seismic performance of full-scale nonstructural elements with multiple engineering parameters(EDPs),a three-layer testbed named Nonstructural Element Simulator on Shake Table(NEST)has been developed.The testbed consists of three consecutive floors of steel structure.The bottom two floors provide a space to accommodate a full-scale room.To fully explore the flexibility of NEST,we propose a novel control strategy to generate the required shake table input time histories for the testbed to track the target floor motions of the buildings of interest with high accuracy.The control strategy contains two parts:an inverse dynamic compensation via simulation of feedback control systems(IDCS)algorithm and an offline iteration procedure based on a refined nonlinear numerical model of the testbed.The key aspects of the control strategy were introduced in this paper.Experimental tests were conducted to simulate the seismic responses of a full-scale office room on the 21^(st)floor of a 42-story high-rise building.The test results show that the proposed control strategy can reproduce the target floor motions of the building of interest with less than 20%errors within the specified frequency range.
文摘作为新一代信息技术的突出代表,数据中心(IDC,Internet Data Center)承载着海量数据,为互联网数据交换、计算分析、存储共享等提供算力服务的物理载体,是数字化发展的关键基础设施。当前,5G、AI、物联网、大数据等技术不断向各行各业渗透发展,带动新场景、新应用的内容不断丰富,行业数据量的需求快速增长,数据中心产业的新一轮快速发展迎来新的机遇。
文摘互联网数据中心(Internet Data Center,IDC)网络系统在目前的各个行业领域中出现频率已经逐渐升高,业界对于该网络系统的安全特性关注度也相对较高。IDC网络安全问题繁多,对于整个行业的快速发展是一种阻碍。基于此,文章介绍IDC网络及其安全特性表现,分析其所存在的安全问题,并研究相应处理技术,证明IDC网络系统安全问题处理与防护优化的重要价值。
