Table 1 Loss function of the proposed method

\(\:\text{L}\text{o}\text{s}\text{s}\:=\:\frac{1}{\text{N}}\sum\limits_{\text{j}=1}^{\text{N}}(-\frac{1}{n}\sum\limits_{i}\sum\limits_{c=1}^{M}{y}_{ic}\text{log}\left({p}_{ic}\right))\)

N: number of task. n: sample size in each task. M: class number in each task. \(\:{y}_{ic}\) : target label for each sample. \(\:{p}_{ic}\) : prediction result for each sample.