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The development of cooperative vehicle safety (CVS) applications, such as collision warnings, turning assistants, and speed advisories, etc., has received great attention in the past few years. Accurate vehicular localization is essential to enable these applications. In this study, motivated by the proliferation of the Global Positioning System (GPS) devices, and the increasing sophistication of...
This article presents further developments of our earlier vector polar histogram method (VPH+) for unmanned ground vehicle (UGV) real-time obstacle avoidance and navigation in complicated unknown environments. Two other strategies, wall-following and move-to-goal are combined into the VPH+ method to overcome the local minimum problem. Meanwhile, a simple yet effective coordination mechanism that determines...
The switching impulse discharge performances of live working electric structure on outer phase, middle phase and tension string in 1000kV AC transmission line were studied. And based on the results, by calculation and analysis of the risk of live working, the minimum approach distance for live working was determined.
To reduce the localization error by Concentric Anchor Beacon (CAB) algorithm in wireless sensor networks, a node localization algorithm based on dual-restricted-area (DRAL) is proposed. In the proposed algorithm, all the perpendicular bisectors of the lines which connect each pair of anchor nodes are used to obtain another kind of possible location area for unknown nodes. Based on the new possible...
Wireless energy transfer based on coupled magnetic resonances is a new technology which energy can be transferred via coupled magnetic resonances in the non-radiative near-field. A simple energy transfer system structure was proposed in this paper. Based on this structure, the back electromotive force (back-EMF) in the receiving coil related with different transfer distance and with driving frequency...
Aiming at the practical applications of novel wireless energy transfer, the mathematical model for wireless energy transfer devices based on intermediate frequency resonant is established in this paper. Based on the electromagnetic fields sine-band theory, the transfer scheme using lumped parameters is designed. It is proved that using the resonator with a high quality factor value and coupling coefficient...
This paper presents a restricted-area-based localization algorithm (RAL) for wireless sensor networks (WSN), in which radio connectivity and principle of perpendicular bisectors are used to provide a lower estimation error than some of restricted-area-based localization algorithms. In the RAL algorithm, anchor nodes can transmit beacon signals at different power levels, which divide the possible transmission...
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