The article describes the layered model of physical network and information security, and the establishment of the mobile Internet’s security framework based on its network architecture. The mobile Internet has three...The article describes the layered model of physical network and information security, and the establishment of the mobile Internet’s security framework based on its network architecture. The mobile Internet has three parts, i.e. terminal, network and service system, each of which can be studied in four layers of the network and information security, namely, the equipment/environment security layer, the service and application security layer, the information security layer and the information content security layer.展开更多
According to the phenomenon of "four more"and"four low "problems in the observation stations,the surface-based meteorological observing system can't adapt to the change of the adaptive observat...According to the phenomenon of "four more"and"four low "problems in the observation stations,the surface-based meteorological observing system can't adapt to the change of the adaptive observation equipment and reduce of business intensification. A station integrated system is proposed,w hich can be configured,connected and extended to all kinds of observation equipment. And the integrated processor is designed,supporting a variety of communication interface standards. Flexible configuration,connection and expansion betw een conventional and new type of meteorological observation equipment are supported. It is capable for online calibration and maintenance of observation equipment. The effectiveness of automatic observation equipment is totally achieved to provide basic information support for disaster prevention and mitigation and national economic development.展开更多
以码垛机器人虚拟样机作为研究对象,分析机器人在静态下的受力情况,运用Solid W orks的sim ulation模块对机器人进行静力学分析。在此基础上,校核和优化设计机器人的机构,使机器人在满足结构强度和刚度的前提下,能够减轻整体的重量,降...以码垛机器人虚拟样机作为研究对象,分析机器人在静态下的受力情况,运用Solid W orks的sim ulation模块对机器人进行静力学分析。在此基础上,校核和优化设计机器人的机构,使机器人在满足结构强度和刚度的前提下,能够减轻整体的重量,降低生产成本。展开更多
A genetic neural net work m odel about design of Mg content in the alloy , based on tested databetw een Mg and tensile intensity or elongation in Zn 27 % Al alloy , has been established . Theresult has sho w n th...A genetic neural net work m odel about design of Mg content in the alloy , based on tested databetw een Mg and tensile intensity or elongation in Zn 27 % Al alloy , has been established . Theresult has sho w n that the genetic neural netw ork is a better an d m ore applied method for m a terials design than the regress analysis .展开更多
For precise composition control and the selection of hot-w orking operation,effects of carbon（ C）,sulphur（ S）,phosphorus（ P）,and nickel（ Ni） compositions and hot working on thermal fatigue properties of H13 st...For precise composition control and the selection of hot-w orking operation,effects of carbon（ C）,sulphur（ S）,phosphorus（ P）,and nickel（ Ni） compositions and hot working on thermal fatigue properties of H13 steel under thermal cycling conditions w ere studied by a self-restraint thermal fatigue test. Results show ed that the control of the C content at about 0. 35%,Ni content at about 0. 50%,and S and P contents as low as possible and the forging operation used lead to an improvement of the thermal fatigue resistance of the steel.展开更多
基金supported by the National HighTechnology Research and Development Programof China ("863" Program) under Grant No.2008AA01A204
文摘The article describes the layered model of physical network and information security, and the establishment of the mobile Internet’s security framework based on its network architecture. The mobile Internet has three parts, i.e. terminal, network and service system, each of which can be studied in four layers of the network and information security, namely, the equipment/environment security layer, the service and application security layer, the information security layer and the information content security layer.
基金supported by Meteorological Industry Research Projects ( 2013 ) : Development and Application of Key Integration Technologies for Surface-based Meteorological Observation
文摘According to the phenomenon of "four more"and"four low "problems in the observation stations,the surface-based meteorological observing system can't adapt to the change of the adaptive observation equipment and reduce of business intensification. A station integrated system is proposed,w hich can be configured,connected and extended to all kinds of observation equipment. And the integrated processor is designed,supporting a variety of communication interface standards. Flexible configuration,connection and expansion betw een conventional and new type of meteorological observation equipment are supported. It is capable for online calibration and maintenance of observation equipment. The effectiveness of automatic observation equipment is totally achieved to provide basic information support for disaster prevention and mitigation and national economic development.
文摘A genetic neural net work m odel about design of Mg content in the alloy , based on tested databetw een Mg and tensile intensity or elongation in Zn 27 % Al alloy , has been established . Theresult has sho w n that the genetic neural netw ork is a better an d m ore applied method for m a terials design than the regress analysis .
文摘For precise composition control and the selection of hot-w orking operation,effects of carbon（ C）,sulphur（ S）,phosphorus（ P）,and nickel（ Ni） compositions and hot working on thermal fatigue properties of H13 steel under thermal cycling conditions w ere studied by a self-restraint thermal fatigue test. Results show ed that the control of the C content at about 0. 35%,Ni content at about 0. 50%,and S and P contents as low as possible and the forging operation used lead to an improvement of the thermal fatigue resistance of the steel.
