System combination has been a very successful method for statistical machine translation, so the idea has been also picked up to improve word alignments.
Word Alignment Combination is the main subject of 16 publications.
Topics in WordAlignmentWord Alignment Based On Coocurrence | Word Alignment With Linguistic Annotation | Word Alignment For Syntax Based Models | Discriminative Word Alignment | Word Alignment Combination | Word Alignment Evaluation | Alignment Of Subsentential Units
Topics in WordBasedModelsIBM Models | Symmetrization | Word Alignment | Dictionaries From Comparable Corpora | Lexical Choice | MT Without Word Alignment
System combination of output from different machine translation systems is a more complex problem, but has been shown to be very successful.