structural:summarization, information:highlighting
Termination

Conclude the iterative process if E Z ∣ θ (t), x ≤ E Z ∣ θ (t − 1), x + ε {\displaystyle E_{Z\mid \theta ^{(t)},\mathbf {x} }\leq E_{Z\mid \theta ^{(t-1)},\mathbf {x} }+\varepsilon } for ε {\displaystyle \varepsilon } below some preset threshold.