Do you mean "reordering model" in general? If so, it must be used unless the preprocessor "completely got rid of local/global distortion".
On the other hand, some specific reordering models such as Lexicalized Rerordering Model in Moses may not be useful. Distance-based reordering doesn't deal with global reordering well, rather it relocate some phrases within a certain boundary. Despite many researches have been suggested for global reordering, it is a still unsolved problem.. -- Hwidong Na <[email protected]> KLE lab, POSTECH, KOREA 2010-02-22 (월), 12:49 +0000, Carlos Henriquez: > The reordering model tries to deal with global reordering rather than > local reordering because the latter is generally solved with phrase > generation. > > So it depends on the language pair used. Cases like Catalan-Spanish > may omit the use of reordering models because they are very much > alike. English-Spanish or Chinese-English, on the other hand, consider > the reordering model as a "must-be-used" component. Phrase generation > will not be able to deal with reordering alone there. > > You may read more on the Lexicalized Reordering Model here > > http://www.statmt.org/moses/?n=Moses.AdvancedFeatures#ntoc1 > > or you may got to the Tillmann paper here > > http://portal.acm.org/citation.cfm?id=1613984.1614010 > > Which languages are you working on? > > -- > Carlos A. Henríquez Q. > [email protected] > > > > > ______________________________________________________________________ > De: Calia <[email protected]> > Para: [email protected] > Enviado: lun,22 febrero, 2010 05:36 > Asunto: [Moses-support] Is reordering model a "must-be-used" component > to use? > > > I wonder if I may exclude the reordering model during search. > > Since I came up with my morpho-syntactical preprocessor to transform > source language > > in both training-time and run-time, and reordering model deals with > the local reordering or words > > during translation, there doesn't seem to be the need for using it if > the preprocessor > > completely got rid of local/global distortion, even for language > model? > > Is my hypothesis justified? > > Actually, from my subjective evaluation, using phrase-table and lm > alone shows better result than > > when I use them with reordering model. But I am not sure of my theory. > > p.s. I've purchased Koehn's new book on SMT which I find gigantically > lovely! Thanks > > _______________________________________________ > Moses-support mailing list > [email protected] > http://mailman.mit.edu/mailman/listinfo/moses-support _______________________________________________ Moses-support mailing list [email protected] http://mailman.mit.edu/mailman/listinfo/moses-support
