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Multicast is an important way to diffuse data in duty-cycled wireless sensor networks (WSNs), where nodes can receive data only in active state. The communication delay can be extremely large if inappropriate schedules are adopted. Unfortunately, most previous methods do not consider controlling multicast delay energy-efficiently. This paper studies the minimum active time slot augmentation for delay-bounded...
Beaconing is a fundamental networking service where each node broadcasts a packet to all its neighbors locally. Unfortunately, the problem Minimum Latency Beaconing Schedule (MLBS) in duty-cycled scenarios is not well studied. Existing works always have rigid assumption that each node is only active once per working cycle. Aiming at making the work more practical and general, MLBS problem in duty-cycled...
Gearbox fault signal has non-stationary and non-linear features, conventional spectral analysis methods all have their own limitations. This paper presents the method of combining empirical mode decomposition (EMD) and cepstrum analysis, and develops a gearbox fault detection system based on LABVIEW. Practical tests show that each signal could be decomposed into a number of intrinsic mode functions(IMFS)...
The paper provides an efficient extrapolation algorithm to enhance resolution as well as reduce sidelobes, which is based on ASR. The processing of algorithm is simple to operate. Simulation experiments show the validity of the algorithm. Comparing to the Fourier method, the proposed algorithm obtains better results.
Voltage fluctuation and voltage flicker as indexes of power quality (PQ) have been attracting more and more attentions. In this paper, a novel method based on the wavelet threshold de-noising technology and the Prony analysis for flicker measurement is introduced. Firstly, an improved wavelet threshold de-noising technology is used to pretreat the data of voltage flicker signal. Then the Prony algorithm...
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