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Automatic estimation of symbol parameters plays a prominent role in electronic reconnaissance and electronic warfare systems. How to estimate the code width without prior knowledge is an important problem in modulation recognition. Hilbert transform can effectively extract the instantaneous mutation characteristics of digital communication signals. In this paper, in order to demodulate MPSK underwater...
A time synchronization algorithm for hidden mobile node (HMB), which can only receive signals, joining an existing synchronized underwater Acoustic (UWA) sensor network (UASN) is proposed. In order to obtain the location of the HMB or communicate with it, the local time of the HMB should synchronize with the UASN. However, the propagation delay in UWA channels could not be ignored compared to electromagnetic...
Aiming at the accurate prediction of APU residual life in civil aviation, Fusion of historical state performance monitoring data, a method of APU residual life prediction based on proportional hazards model (PHM) is proposed. This method first gives a life prediction algorithm based on PHM. Then, based on the historical performance degradation data and historical failure time data, the genetic parameters...
Aiming at the ordering problem of the key spare parts whose life is consistent with Weibull distribution, an optimization method based on residual life prediction is proposed considering both residual life and the lead time. Firstly, the Weibull distribution parameters of the component life are estimated according to the historical data of the airline and the state change information of the part on...
Solar power is a kind of clean and renewable energy, which can be utilized in the industrial micro-grid as an effective approach to decrease energy costs and reduce the emission of greenhouse. However, the uncertainty of solar power together with the limit of thermal power units' adjustment ability will bring a great challenge to keeping balance of power demand and supply. In this paper, the storage...
Price indicators are considered as the core of optimal allocation of resources in electricity markets. Zonal pricing can provide more flexible price signals than nodal pricing and uniform pricing, and a reasonable division of the energy market into zones is essential. In this paper, a topology based K-means clustering algorithm is developed which starts from calculating the locational marginal prices...
Through the mathematical model, we can verify that the optimal macro-tax burden rate of our province is 13.36%.The research demonstrates that there is a positive correlation between the level of economic development and the macro-tax burden in our province, while at the same time existing separation to some extent‥
Traditional current differential protection is based on Kirchhoffs Law, certainly is severely influenced by the distributed capacitance current. A new traveling wave based differential protective principle is proposed by employing the characteristics of current traveling waves for the distributed parameter line model. There are fixed propagation relations between traveling waves of terminals as the...
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