Hilbert-Huang Transform Based Time Series Analysis of Water Quality Parameters
KAM '11 Proceedings of the 2011 Fourth International Symposium on Knowledge Acquisition and Modeling(2011)
Abstract
In order to study affecting the variation rule of the water quality parameters, we employed Hilbert-Huang Transform (HHT) to analyze the concentration value of Cd using 26 years' data in F3 site, and got the variation rule and trends of Cd. The results showed that: In Station F3, Cd concentration is non-stationary time series, and the trend is clearly for the upward trend, a slight decline in the future, the main cycle of 10 months, 43 months, 51 months and 73 months. To research the variation rule of Cd concentration and forecast the trends is meaningful.
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Key words
cd concentration,time series analysis,main cycle,hilbert-huang transform,f3 site,variation rule,non-stationary time series,slight decline,upward trend,station f3,water quality parameters,concentration value,hilbert huang transform,time series,cadmium
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