Evidence from recent earthquakes has shown destructive consequences of fault-induced permanent ground movement on structures.Such observations have increased the demand for improvements in the design of structures tha...Evidence from recent earthquakes has shown destructive consequences of fault-induced permanent ground movement on structures.Such observations have increased the demand for improvements in the design of structures that are dramatically vulnerable to surface fault ruptures.In this study a novel connection between the raft and the piles is proposed to mitigate the hazards associated with a normal fault on pile-raft systems by means of 3D finite element(FE)modeling.Before embarking on the parametric study,the strain-softening constitutive law used for numerical modeling of the sand has been validated against centrifuge test results.The exact location of the fix-head and unconnected pile-raft systems relative to the outcropping fault rupture in the free-field is parametrically investigated,revealing different failure mechanisms.The performance of the proposed connection for protecting the pile-raft system against normal fault-induced deformations is assessed by comparing the geotechnical and structural responses of both types of foundation.The results indicate that the pocket connection can relatively reduce the cap rotation and horizontal and vertical displacements of the raft in most scenarios.The proposed connection decreases the bending moment response of the piles to their bending moment capacity,verging on a fault offset of 0.6 m at bedrock.展开更多
It was 18:59.Sister Magdalene rose from her chair by the front gate of the churchandwalked towards thebell tower.Leaning to one side,Magdalene grasped the rope with her right hand while reaching into herpocket withher...It was 18:59.Sister Magdalene rose from her chair by the front gate of the churchandwalked towards thebell tower.Leaning to one side,Magdalene grasped the rope with her right hand while reaching into herpocket withher left,pulling out hercellphoneto check the time once more-7:00 p.m.展开更多
A new scheme of the home control system based on ZigBee wireless sensor networks is presented. The design and development of the software and hardware of the proposed system are given. In addition to the basic data ac...A new scheme of the home control system based on ZigBee wireless sensor networks is presented. The design and development of the software and hardware of the proposed system are given. In addition to the basic data acquisition and processing functions, the gateway supports the Bluetooth-based local interface and the general packet radio service （GPRS）-based remote interface. Users on the client service side can use a pocket PC or notebook PC to achieve real-time data acquisition and control instruction implementation, or remotely control the home control system through a mobile phone by sending a short message. The Labview graphical development environment is adopted to create PDA applications running on pocket PCs and monitoring platform established on notebook PCs. Except for the gateway, other nodes in the system work in sleep mode most of the time on the system, and thus it improves the lifetime of the whole system efficiently.展开更多
本文以实际开发项目为例,讲解基于Windows Mobile 5.0平台的北京城市学院移动办公系统的开发过程。介绍了如何远程访问服务器数据库中的数据和本地数据库中的数据,以及本地数据如何实现与服务器上的数据同步等问题。详细论述了通过Windo...本文以实际开发项目为例,讲解基于Windows Mobile 5.0平台的北京城市学院移动办公系统的开发过程。介绍了如何远程访问服务器数据库中的数据和本地数据库中的数据,以及本地数据如何实现与服务器上的数据同步等问题。详细论述了通过Windows Mobile 5.0 Pocket PC SDK与SQL Server 2005 Mobile Edition的完美结合,开发出办公不受时间和地点约束,客户端在只要有手机信号或能上网的地方就可以和服务器进行通信的无线移动办公系统的方法,使开发移动应用程序的用户对开发无线移动项目有一个全面的了解与把握。展开更多
基金Babol Noshirvani University of Technology under Grant No.P/M/1102。
文摘Evidence from recent earthquakes has shown destructive consequences of fault-induced permanent ground movement on structures.Such observations have increased the demand for improvements in the design of structures that are dramatically vulnerable to surface fault ruptures.In this study a novel connection between the raft and the piles is proposed to mitigate the hazards associated with a normal fault on pile-raft systems by means of 3D finite element(FE)modeling.Before embarking on the parametric study,the strain-softening constitutive law used for numerical modeling of the sand has been validated against centrifuge test results.The exact location of the fix-head and unconnected pile-raft systems relative to the outcropping fault rupture in the free-field is parametrically investigated,revealing different failure mechanisms.The performance of the proposed connection for protecting the pile-raft system against normal fault-induced deformations is assessed by comparing the geotechnical and structural responses of both types of foundation.The results indicate that the pocket connection can relatively reduce the cap rotation and horizontal and vertical displacements of the raft in most scenarios.The proposed connection decreases the bending moment response of the piles to their bending moment capacity,verging on a fault offset of 0.6 m at bedrock.
文摘It was 18:59.Sister Magdalene rose from her chair by the front gate of the churchandwalked towards thebell tower.Leaning to one side,Magdalene grasped the rope with her right hand while reaching into herpocket withher left,pulling out hercellphoneto check the time once more-7:00 p.m.
基金The National High Technology Research and Development Program of China (863Program) (No.2006AA01Z221)the NationalNatural Science Foundation of China (No.60875070)+1 种基金the Innovation Project of Graduate Students of Jiangsu Province (No.CX08B-049Z)Southeast University Teaching and Research Foundation
文摘A new scheme of the home control system based on ZigBee wireless sensor networks is presented. The design and development of the software and hardware of the proposed system are given. In addition to the basic data acquisition and processing functions, the gateway supports the Bluetooth-based local interface and the general packet radio service （GPRS）-based remote interface. Users on the client service side can use a pocket PC or notebook PC to achieve real-time data acquisition and control instruction implementation, or remotely control the home control system through a mobile phone by sending a short message. The Labview graphical development environment is adopted to create PDA applications running on pocket PCs and monitoring platform established on notebook PCs. Except for the gateway, other nodes in the system work in sleep mode most of the time on the system, and thus it improves the lifetime of the whole system efficiently.
文摘本文以实际开发项目为例,讲解基于Windows Mobile 5.0平台的北京城市学院移动办公系统的开发过程。介绍了如何远程访问服务器数据库中的数据和本地数据库中的数据,以及本地数据如何实现与服务器上的数据同步等问题。详细论述了通过Windows Mobile 5.0 Pocket PC SDK与SQL Server 2005 Mobile Edition的完美结合,开发出办公不受时间和地点约束,客户端在只要有手机信号或能上网的地方就可以和服务器进行通信的无线移动办公系统的方法,使开发移动应用程序的用户对开发无线移动项目有一个全面的了解与把握。
