Using Empirical Modal Decomposition to Improve the Daily Milk Yield Prediction of Cows

Figure 2

EMD denoised. The observed value is the original milk yield value, and the value varies between 10 and 45 kg per day. The original milk yield series was decomposed through EMD, to obtain IMFs and the residual series. The resultant IMF after decomposition showed obvious physical significance, which represented the hidden fluctuation components in the original milk yield series at various scale. Residual series reflect a hidden prolactin change, i.e., most milk yield value changes between 20 and 35. The high-frequency IMF1 was removed, then other IMFs were cumulatively added, which were then added with residual to obtain the denoised milk yield series.