Author: Freitas, André Ricardo Ribas; Donalisio, Maria Rita
Title: Respiratory syncytial virus seasonality in Brazil: implications for the immunisation policy for at-risk populations Document date: 2016_5_23
ID: 0ss52vfd_16
Snippet: Next, the laboratory and hospitalisation data were analysed through Fourier time series decomposition using sinusoidal harmonics of the annual and semi-annual cycles. Fourier analysis considers every period to have a periodic stable frequency throughout time. This method allows analysing signals and systems through decomposition of periodic functions in convergent trigonometric series (sin and cos). In this case, it allowed identifying the time o.....
Document: Next, the laboratory and hospitalisation data were analysed through Fourier time series decomposition using sinusoidal harmonics of the annual and semi-annual cycles. Fourier analysis considers every period to have a periodic stable frequency throughout time. This method allows analysing signals and systems through decomposition of periodic functions in convergent trigonometric series (sin and cos). In this case, it allowed identifying the time of annual and biannual peaks of the time series analysed through multiple linear regression.
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