Algorithm 3 Speaker adaptation

$$\begin{array}{ll}\underset{\mathbf{T}}{\text{minimize}}& {\Vert \mathbf{T}-1\Vert }_2\\ \text{subject to}& {\displaystyle \sum _{k=1}^{N_a}{\displaystyle \sum _{j=1}^D{\mathbf{X}}_a}(k,j)\mathbf{t}(j)\mathbf{w}(j)=s_a}\\ & \mathbf{T}\ge 0\\ & \mathbf{T}(i,j)=0,\forall j>i+1;1\le i,j\le D\\ & \mathbf{T}(i,j)=0,\forall j>i-1;1\le i,j\le D\end{array}$$