Báo cáo khoa học: "Word Alignment Combination over Multiple Word Segmentation" docx

... combine word alignments over multiple mono-lingually motivated word segmentation. Our approach is based on link confidence score de-fined over multiple segmentations, thus the combined alignment ... this paper, we present a new word alignment combination approach on language pairs where one language has no explicit word boundaries. Instead of combining word alignments of dif-ferent models ... OR, USA 19-24 June 2011.c2011 Association for Computational Linguistics Word Alignment Combination over Multiple Word Segmentation Ning Xi, Guangchao Tang, Boyuan Li, Yinggong Zhao State...

Báo cáo khoa học: "Is Conceptual Combination Influenced by Word Order?" docx

... involved in relation selection, irrespective of its order in a combination. 1 Introduction The combination of two existing words is a productive strategy used by speakers to convey new concepts ... Abstract We describe two experiments using French noun-noun combinations which parallel a study carried out by Gagné (2001) using English combinations. The order of the modifier and head noun are ... Is Conceptual Combination Influenced by Word Order? Phil Maguire Department of Computer Science University College Dublin...

Báo cáo khoa học: "A Comparison of Syntactically Motivated Word Alignment Spaces" doc

... environment.2 Alignment SpacesLet an alignment be the entire structure that con-nects a sentence pair, and let a link be the in-dividual word- to -word connections that make upan alignment. An alignment ... concerned with the space ofalignments searched by word alignment systems. We focus on situations where word re-ordering is limited by syntax. Wepresent two new alignment spaces thatlimit an ... ﬂatstrings. They remain the dominant method for word alignment (Och and Ney, 2003). There havebeen several proposals to introduce syntax into word alignment. Some work w ithin the frameworkof...

Báo cáo khoa học: "Bilingual Topic AdMixture Models for Word Alignment" ppt

... translationcandidates and word -alignment choices. For ex-ample, the most frequent source words (e.g., func-tional words) are likely to be translated into wordswhich are also frequent on the target side; words ... such as word- pair”, “sentence-pair”, and “document-pair”. Formally, we deﬁne the following terms1:• A word- pair (fj, ei) is the basic unit for word alignment, where fjis a French word ... to avoid over tting:B∗f,e,k= λBf,e,k+(1−λ)p(f|e). (13)As in Eqn. 1, p(f|e) is learned via IBM-1; λ isestimated via EM on held out data.4.3 Retrieving Word AlignmentsTwo word- alignment...

Báo cáo khoa học: "A Probability Model to Improve Word Alignment" ppt

... our alignment model as de-scribed above has very few factors to prevent unde-sirable alignments, such as having all French wordsalign to the same English word. To guide the modelto correct alignments, ... Ourexperiments show that this model can bean effective tool for improving an existing word alignment. 1 Introduction Word alignments were ﬁrst introduced as an in-termediate result of statistical machine ... (ft|a,v)= 1 ×12×12×14×114=143 Word -Alignment AlgorithmIn this section, we describe a world -alignment al-gorithm guided by the alignment probability modelderived above. In designing...

Báo cáo khoa học: "Smaller Alignment Models for Better Translations: Unsupervised Word Alignment with the 0" potx

... translation,signiﬁcant improvements over IBM Model 4in both word alignment (up to +6.7 F1) andtranslation quality (up to +1.4 Bleu).1 IntroductionAutomatic word alignment is a vital component ... units bigger than words (like phrasesor tree fragments), they nearly always use word alignments to drive extraction of those translationrules. The dominant approach to word alignment hasbeen ... likelihood training is prone to over tting,especially in models with many parameters. In word alignment, one well-known manifestation of over t-ting is that rare words can act as “garbage collectors”(Moore,...

Báo cáo khoa học: "Semi-Supervised Training for Statistical Word Alignment" docx

... algorithmwith the gold standard word alignments (labels) ofthe word alignment discriminative training set, aninitial λ, N, and the starting alignments (the iter-ation 4 HMM Viterbi alignment) . In line ... other Foreign words translatedfrom a particular e13 zero fertility English word penalty6 translation table from reﬁned combination of bothalignments14 non-zero fertility English word penalty7 ... which leads to an ini-tial increase in word -alignment accuracy.2. We extend the IBM models with new(sub)models, which leads to additional in-creases in word -alignment accuracy. In theprocess,...

Tài liệu Báo cáo khoa học: "A Ranking-based Approach to Word Reordering for Statistical Machine Translation" doc

... procedure後者liesの手順問題では …in…にある(a) gold alignment (b) auto alignment Figure 2: Fragment of a sentence pair. (a) showsgold alignment; (b) shows automatically generated alignment which contains errors.spans. ... ranking reorder model and errors from word alignment and parser.Another thing to note is that the crossing-linknumber of manual alignment is higher than auto-matic alignment. The reason is that our ... the paper.2 Word Reordering as Syntax Tree NodeRankingGiven a source side parse tree Te, the task of word reordering is to transform Teto Te, so that ecanmatch the word order in...

Tài liệu Báo cáo khoa học: "Computing Consensus Translation from Multiple Machine Translation Systems Using Enhanced Hypotheses Alignment" pot

... subsections, we will explainthe word alignment procedure, the reordering ap-proach, and the construction of confusion net-works.2.1 Statistical Alignment The word alignment is performed in analogy ... hypothesis.The new word order for Enis obtained throughsorting the words in Enby the indices of the wordsin Emto which they are aligned. Two words inEnwhich are aligned to the same word in Emarekept ... equal words, i. e.if enis the same word as em. In addition, we adda fraction of a count for words with identical pre-ﬁxes. The initialization could be furthermore im-proved by using word...

Tài liệu Báo cáo khoa học: "An Alignment Algorithm using Belief Propagation and a Structure-Based Distortion Model" pdf

... a “one-sided” concept consisting ofonly one word. In this view, a sentence pair ap-pears “superﬁcially” as a pair of bag of words, butthe bag of words are themselves the visible part ofan ... reasonis that the segmentation and alignment schemeused in our gold standard is not very ﬁne-grained:mostly, big chunks of the Japanese sentence cover-ing several words are aligned to big chunks ... sentence pairs wherejust bag of words underlaid by a or bag of con-cepts, and there was no modeling of the positionof the words. P-concepts bring a notion of word position to the model. Intuitively,...

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