... crossboundaries of the lower VP on the right,therefore CBMF is “VP-RC”.3.3 The Integration of the SDB Model intoPhrase-Based SMTWe integrate the SDB model into phrase-basedSMT to help decoder perform ... s1s2)is used, the SDB model gives a probability to the span s covered by the rule, which estimates the extent to which the span is bracketable. For the unary SDB model, we only consider the featuresfrom ... index j: 1) the bracketable instance with the minimal τ(ci k), 2) the bracketable instance with the maximal τ(ci k),3) the unbracketable instance with the minimalτ(ci k), and 4) the unbracketable...