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In order to realize the real time tracking and prediction of ultra-short term power of PV power station, according to the actual monitoring data of the photovoltaic power station, an ultra-short term power forecasting model based on autoregressive moving average (ARIMA) and support vector regression (SVR) is established in this paper. The ARIMA model has good adaptability to the linear trend. The...
The aging of quartz crystal resonators has been a key requirement of the product development and broad applications in signal generation and processing of many mission and life critical functions. Among many aging models for the analysis of long-term behavior of quartz crystal resonators, the Arrhenius model is widely accepted for most materials in engineering applications and physical process including...
For practical applications of quartz crystal resonators, accurate estimation of the aging pattern and adoption of appropriate correction procedure will be important in ensuring the precise operating condition and maintaining their optimal performance. There are two generally accepted aging models for the prediction of long-term behavior of quartz crystal resonators. The Arrhenius model is universally...
Empirical Mode Decomposition(EMD) is an advanced method for analyzing non-stationary signal, but there is an involved end issue in the course of getting two envelops of the data using spline interpolation. In this paper a novel method based on grey prediction model is proposed to restrain the end effect of empirical mode decomposition. In the grey prediction endpoint extension process, based on the...
It is always desirable to improve the quality of a global classification model with the existence of other models. In this work, bucket learning methodology is first proposed to improve the model quality through enhancing its local patterns. We formally define the concept of slab as a tri-tuple <D, M, R>, which unifies the data view, model view and evaluation view of a data mining task. The...
It has been found that a set of Hertzian dipoles can be optimized to model the radiation characteristics of an antenna. However, the existing models are normally for narrowband antennas and invalid for a wideband antenna. In addition, it is difficult to combine several such models at different frequencies into a wideband model because the interpolation of dipole parameters is not applicable. This...
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