This paper tended to make a brief introduction of project-based teaching method and the situation of vocational school students’English learning in the class of the major e-commerce in the internet plus era,then the ...This paper tended to make a brief introduction of project-based teaching method and the situation of vocational school students’English learning in the class of the major e-commerce in the internet plus era,then the writer focused on presenting the process design a practical case of lesson design base on the tasked-based method in the English classroom teaching,which would be an active approach of teaching evolution in the information networking era.展开更多
In terms of special geological conditions of the Western Route of South-to-North Water Transfer Project, the classification method for surrounding rocks is discussed by combining with the construction method of tunnel...In terms of special geological conditions of the Western Route of South-to-North Water Transfer Project, the classification method for surrounding rocks is discussed by combining with the construction method of tunnel boring machine （TBM）. The classification standard of surrounding rocks is put forward on the basis of physical simulations and engineering practices. Damage, deformation and evolution of surrounding rocks induced by TBM excavation are discussed. Meanwhile, the long-term deformation mechanisms and stability of surrounding rocks are also studied. On this basis, a three-dimensional constitutive model for interbedded sandstone slate and a fiat shell-joint element-foundation system for calculating internal forces of segment lining are established. The deformation features of surrounding rocks of deep and steep interbedded sandstone slate and their influences on internal forces of segment lining are presented. Finally, the design methods of segment lining constructed in deep and steep flysch are proposed.展开更多
目前,大多数无害化处置运输车辆使用全球定位系统(global positioning system,GPS)来确定病死猪的消毒站位置和运输路线。然而,当车辆在偏远山区运行时,定位信息传递不连续和不完整。为了解决这个问题,设计了一套病死猪无害化处理监控系...目前,大多数无害化处置运输车辆使用全球定位系统(global positioning system,GPS)来确定病死猪的消毒站位置和运输路线。然而,当车辆在偏远山区运行时,定位信息传递不连续和不完整。为了解决这个问题,设计了一套病死猪无害化处理监控系统,系统结合北斗导航系统、全球定位系统、无线射频识别技术(radio frequency identification,RFID)、通用分组无线服务技术和地理信息系统等技术。利用北斗/GPS 双模用户机双模定位和双向通信的功能,一方面,它可以解决单一定位时出现的定位信息不稳定的问题;另一方面,当BDS导航定位系统数据似乎显示出偏差,将 WGS-84坐标系的GPS定位数据转换为BDS定位系统的CGCS2000坐标系,以提高运输车辆位置信息采集精度的目的。利用GAMIT软件计算观测点的三维坐标,并对组合导航和单导航的定位精度进行分析。采用Floyd算法对运输路线进行优化,寻找最短的运输距离。利用北斗卫星的信息通信功能代替全球移动通信系统(global system for mobile communications,GSM),短消息业务,实现无害化运输车辆与控制中心之间的信息远程传输。控制中心通过对接收到的数据进行分析,得到病死猪收运车的运输路线和定点消毒监测信息。系统试验表明:采集的数据能够准确及时地传输到控制中心,北斗/GPS 双模接收机定位精度比北斗卫星定位精度高 55.13%,比GPS卫星定位精度高 52.71%。北斗通信的网络丢包率为0.26%,消毒点的车辆定点识别误差率 0.97%,结果表明,满足病死猪无害化处理监控管理的要求,系统运行可靠、稳定。该系统的构建与应用,为其他病死动物无害化处理的综合管理与监控提供参考。展开更多
文摘This paper tended to make a brief introduction of project-based teaching method and the situation of vocational school students’English learning in the class of the major e-commerce in the internet plus era,then the writer focused on presenting the process design a practical case of lesson design base on the tasked-based method in the English classroom teaching,which would be an active approach of teaching evolution in the information networking era.
基金Supported by the National Key Technology R&D Program in the 11th Five-year Plan of China (2006BAB04A06)
文摘In terms of special geological conditions of the Western Route of South-to-North Water Transfer Project, the classification method for surrounding rocks is discussed by combining with the construction method of tunnel boring machine （TBM）. The classification standard of surrounding rocks is put forward on the basis of physical simulations and engineering practices. Damage, deformation and evolution of surrounding rocks induced by TBM excavation are discussed. Meanwhile, the long-term deformation mechanisms and stability of surrounding rocks are also studied. On this basis, a three-dimensional constitutive model for interbedded sandstone slate and a fiat shell-joint element-foundation system for calculating internal forces of segment lining are established. The deformation features of surrounding rocks of deep and steep interbedded sandstone slate and their influences on internal forces of segment lining are presented. Finally, the design methods of segment lining constructed in deep and steep flysch are proposed.
文摘目前,大多数无害化处置运输车辆使用全球定位系统(global positioning system,GPS)来确定病死猪的消毒站位置和运输路线。然而,当车辆在偏远山区运行时,定位信息传递不连续和不完整。为了解决这个问题,设计了一套病死猪无害化处理监控系统,系统结合北斗导航系统、全球定位系统、无线射频识别技术(radio frequency identification,RFID)、通用分组无线服务技术和地理信息系统等技术。利用北斗/GPS 双模用户机双模定位和双向通信的功能,一方面,它可以解决单一定位时出现的定位信息不稳定的问题;另一方面,当BDS导航定位系统数据似乎显示出偏差,将 WGS-84坐标系的GPS定位数据转换为BDS定位系统的CGCS2000坐标系,以提高运输车辆位置信息采集精度的目的。利用GAMIT软件计算观测点的三维坐标,并对组合导航和单导航的定位精度进行分析。采用Floyd算法对运输路线进行优化,寻找最短的运输距离。利用北斗卫星的信息通信功能代替全球移动通信系统(global system for mobile communications,GSM),短消息业务,实现无害化运输车辆与控制中心之间的信息远程传输。控制中心通过对接收到的数据进行分析,得到病死猪收运车的运输路线和定点消毒监测信息。系统试验表明:采集的数据能够准确及时地传输到控制中心,北斗/GPS 双模接收机定位精度比北斗卫星定位精度高 55.13%,比GPS卫星定位精度高 52.71%。北斗通信的网络丢包率为0.26%,消毒点的车辆定点识别误差率 0.97%,结果表明,满足病死猪无害化处理监控管理的要求,系统运行可靠、稳定。该系统的构建与应用,为其他病死动物无害化处理的综合管理与监控提供参考。
