Shuqi Liu

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In urban rail transit system, utilization of the regenerative energy of trains is quite an efficient way for energy saving. This paper aims to reduce the total energy consumption of trains in a whole day by optimal utilization of the regenerative energy. The regenerative energy is generated by the braking trains, and in the same time used by the(More)
Energy efficiency is paid more and more attention in urban rail transit systems. Optimization on Automatic Train Operation (ATO) is important to energy-efficient operation of trains. ATO generates the recommended speed curve based on the railway line parameters, the scheduled time table, and the vehicle conditions. The control strategy of ATO makes the(More)
—In this paper, we propose a model of mobile cognitive radio network after fully considering the analysis method of network connectivity based on random way-point (RWP) mobility scheme. The closed-form solution of connectivity probability has been derived to evaluate the network performance in this model. And it shows that the network connectivity is(More)
In order to accurately calculate the generator loss, point out the distribution of generator loss and reveal the effect of harmonic magnetic field and other factors to generator loss. In this paper, a 6.5 MW doubly-fed hydro-generator was taken as an example. Time–stepping finite element method was adopted for the numerical simulation of electromagnetic(More)
Cognitive routing coupled with cooperative spectrum sensing in multi-hop Cognitive Radio Ad Hoc Network (CRAHN) is investigated. Recognizing the spectrum dynamics and the problems of hidden terminal and shadow fading in CRAHNs, we propose an opportunistic routing protocol that exploits a Dual-stage Collaborative Spectrum Sensing (DCSS) scheme to improve the(More)
In this paper, we propose a model of mobile cognitive radio network after fully considering the analysis method of network connectivity based on Random Way-point (RWP) mobility scheme in cognitive radio network. The closed formula of connectivity probability has been derived to evaluate the network connectivity in this model. And it shows that the network(More)