Figure 2.

Framework of the proposed brain functional network construction. Given brain functional signals $X$, we can compute a Pearson's correlation (PC) matrix $P$, which will be used to define both the connectivity strength weight $C$ for the $l_1$‐norm and the group partition for the $l_{\mathrm{2,1}}$‐norm in the proposed model. The brain network $W$ will be constructed with optimization. [Color figure can be viewed at http://wileyonlinelibrary.com]