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We perform a joint measurement of terahertz waves and high-order harmonics generated from Argon atoms driven by a fundamental laser pulse and its second harmonic. By correlating their dependence on the phase-delay of the two pulses, we determine the generation of THz waves in tens of attoseconds precision. Compared with simulations and models, we find that the laser-assisted soft-collision of the...
Variable message signs (VMS) plays an important role in route guidance of drivers and release of traffic congestion. Response to VMS of drivers is acquired in stated preference (SP) investigation. Traffic demand is estimated and analyzed by Gravity and route choice models. Effects of VMS on route choice and traffic delay are simulated through VISSIM software in the case study of Beijing.
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