The common choice of binary values are 0 and 1. However, in some physics applications, -1 and 1 might be a more natural choice. We will here use 0 and 1. We habe the energy function
$$ \begin{align*} E_{BB}(\boldsymbol{x}, \boldsymbol{h},\boldsymbol{\Theta}) = - \sum_i^M x_i a_i- \sum_j^N b_j h_j - \sum_{i,j}^{M,N} x_i w_{ij} h_j. \end{align*} $$