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As a distributed parameter system, traffic flow model of freeway traffic is determined by the traffic state on-road and boundary flows form on-ramp or off-ramp sections. The existing studies for traffic estimation mainly focus on the traffic parameter, namely density (or vehicles) of mainline traffic. In this paper, Kalman filtering for simultaneous traffic counts and off-ramp flow estimation is proposed...
The wellbore dynamic pressure waves are produced in the perforation liquid after the shaped charges are initiated and then fiercely strike the gunstring, packer, casing and artificial bottom. The impact and damage effect only depend on the amplitude and holding time of dynamic pressures. This paper discusses the simplification of perforators' explosion with gun in the oil well. On the basis of simplification...
In this paper, an adaptive two-direction pitch tracking algorithm for multiband excitation (MBE) vocoder is proposed. Instead of the multiple constraint equations, a difference inequation is constructed. The adaptive adjusting model of the difference threshold is established by utilizing the information including voicing decisions, pitch estimate, and multiple pitch error identification of the previous...
The creep behavior of Zeolite molecular sieves has been investigated in this research by using a nanoindentation test. In the holding time, creep curves were obtained. The results show that the penetration depth during constant load phase is time-dependent. After analysis, creep stress exponents of Zeolite molecular sieves were determined from In epsivdot vs .InH curves. Given a secondary creep material...
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