Due to the satellite signals are blocked, it is difficult obtain vehicle position in tunnels. We propose a single-site localization scheme for rectangular tunnel environment, where most satellite-based positioning methods can not provide required accuracy. In non-line-of-sight (NLOS) scenarios, we make use of reflection paths as assistants positioning. Specifically, first, virtual stations esta...

The buckling torque may be much less than the yield torque in very thin rectangular tubes under torsion. In this paper, simple closed-form formulae are presented for buckling analysis of long hollow rectangular tubes under torsion. By the presented formulae, one can obtain the critical torque or the critical angle of twist of the tube in terms of its geometrical parameters and material constant...

Received Mar 3 th , 2013 Accepted Aug 19 th , 2013 This paper puts forward the node localization Algorithm based on cellular network regional division, i.e. below the range-free circumstance, network topological Structure is built up, targeting unit cellular network and cluster cellular network; the deployment strategies of placing anchor nodes at the vertex and the center of each unit cellular...