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Selection of electricity fee payment site (EFPS) is a complex multi-objective optimization problem. Proper site selection of EFPS can not only facilitate the users to pay the electricity payments, but also save costs in running processes of the power enterprises (PEs). Firstly, two-dimensional genetic code is improved and the multi-object optimization model of EFPS is established. Secondly, considering...
In this paper, we investigate the hop distance optimization problem in ad hoc networks where cooperative multi-input-single-output (MISO) is adopted to improve the energy efficiency of the network. We first establish the energy model of multihop cooperative MISO transmission. Based on the model, the energy consumption per bit of the network with high node density is minimized numerically by finding...
Distributed beamforming has the great potential of performance improvement in wireless networks while the carrier synchronization overhead will reduce its performance gain. In this paper the effects of carrier synchronization on link throughput of distributed beamforming is studied. The expressions of the frequency and initial phase used by each cooperative node are derived for the existing round-trip...
Wireless ad hoc networks have been employed in pervasive computing, rescue and so on. Employing MIMO spatial multiplexing in ad hoc networks, multiple links in the same neighborhood could coexist and multiple RTS/CTS contention slots are required to contest medium. The RTS/CTS contention is a severe overhead that mitigates the performance improvement. The transmission power, which determines the number...
Levitation force is an important technical index of linear induction motor. This paper presents a kind of device which can supply suspension force for hybrid excitation electromagnetic actuators, and calculates the electromagnetic levitation force with 3D field finite element method. The optimization soft package iSIGHT-FD is used to design the structure of the system to gain the largest suspension...
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