optimizing word alignment combination
Tài liệu Báo cáo khoa học: "Word Alignment with Synonym Regularization" doc
... models into low-frequency word pairs in bilingual sentences, and then improved the word alignment performance. The SRH regardsall of the different words coupled with the same word in the synonym pairs ... sen-140Figure 1: Graphical model of HM-BiTAM alignment quality.2 Bilingual Word Alignment ModelIn this section, we review a conventional gener-ative word alignment model, HM-BiTAM (Zhaoand Xing, ... (fjn|En, ajn, zn; B ): sample atarget word fjngiven an aligned source word and topicwhere alignment ajn= i denotes source word eiand target word fjnare aligned. α is a parame-ter...
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Tài liệu Báo cáo khoa học: "Yet Another Word Alignment Tool" docx
... translationsby word alignment but also becaus e of such interfaceissues that aligning words manually has the reputa-tion of being a very tedious task.3 YawatYawat (Yet Another Word Alignment Tool) ... Ex-plorer.Figure 3: Alignment v isualization with Yawat. As the mouse is moved over a word, th e word and all words linkedwith it are highlighted. The highlighting is removed when the mouse leaves the word ... the term word alignment 1Yawat was first presented at the 2007 Linguistic Annota-tion Workshop (Germann, 2007).to refer to any form of alignment that identifies wordsor groups of words as...
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Tài liệu Báo cáo khoa học: "Discriminative Word Alignment with Conditional Random Fields" ppt
... model many-to-one word alignments,where each source word is aligned with zero orone target words, and therefore each target word can be aligned with many source words. Eachsource word is labelled ... one-to-many alignments, where each target word is aligned with zero or more source words.Many-to-many alignments are recoverable usingthe standard techniques for superimposing pre-dicted alignments ... null, denot-ing no alignment. An example word alignment is shown in Figure 1, where the hollow squaresand circles indicate the correct alignments. In thisexample the French words une and autre...
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Tài liệu Báo cáo khoa học: "Finding Synonyms Using Automatic Word Alignment and Measures of Distributional Similarity" pdf
... automatic word alignment. Context vec-tors are built from the alignments found in a paral-lel corpus. Each aligned word type is a feature inthe vector of the target word under consideration.The alignment ... for the automatic word alignment described below.5.2.2 Alignment ContextContext vectors are populated with the links towords in other languages extracted from automatic word alignment. We applied ... translational context based on word alignment and the combination of both. For bothapproaches, we used a cutoff n for each row in our word- by-context matrix. A word is discarded ifthe row marginal...
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Tài liệu Báo cáo khoa học: "Word Alignment for Languages with Scarce Resources Using Bilingual Corpora of Other Language Pairs" pptx
... language word similarity of the Chinese word c and the Japanese word given the English word );,( efcsimfeFigure 1. Similarity Calculation English word e. For the ambiguous English word e, ... context word . ijctje 0=ijct if does not occur in Set i . je(4) Given the English word e, calculate the cross-language word similarity between the Chinese word and the Japanese word ... one for head words and the other for non-head words. Distortion Probability for Head Words The distortion probability for head words represents the relative position of the head word of the...
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Tài liệu Báo cáo khoa học: "Guiding Statistical Word Alignment Models With Prior Knowledge" pdf
... as 1.In building word alignment models, a special“NULL” word is usually introduced to address tar-get words that align to no source words. Since thisphysically non-existing word is not in the ... am1specifies the indices of source wordsthat target words are aligned to.In an HMM-based word alignment model, sourcewords are treated as Markov states while targetwords are observations that are ... generative word alignment models. Prior knowledge serves as softconstraints that shall be placed on translation lexi-con to guide word alignment model training and dis-ambiguation during Viterbi alignment...
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Báo cáo khoa học: "Dealing with Spurious Ambiguity in Learning ITG-based Word Alignment" pdf
... a family of word alignment. Definition 1. The ITG alignment family is a set of word alignments that has at least one BTG deriva-tion.ITG alignment family is only a subset of word alignments because ... am-biguity in word alignment is the case where two ormore derivations d1, d2, dkof G have the sameunderlying word alignment A. A grammar G is non-spurious if for any given word alignment, ... Null -word Attachment AmbiguityDefinition 4. For any given sentence pair (e, f) andits alignment A, let (e, f) be the sentence pairswith all null-aligned words removed from (e, f).The alignment...
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Báo cáo khoa học: "Data Cleaning for Word Alignment" pdf
... areless than 20 percent.2 1 : n Word Alignment Our discussion of uni-directional alignments of word alignment is limited to IBM Model 4.Definition 1 (Word alignment task) Let eibethe i-th ... two word alignmentsas an alignment point, 2) add new alignment pointsthat exist in the union with the constraint that anew alignment point connects at least one previ-ously unaligned word, ... mechanism to aug-ment one source word into several source wordsor delete a source word, while a NULL insertionis a mechanism of generating several words fromblank words. Fertility uses a conditional...
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Báo cáo khoa học: "Improved Discriminative Bilingual Word Alignment" pdf
... sums, for each word w, the number of wordsnot linked to w that fall between the first and lastwords linked to w. The other features counts onlysuch words that are linked to some word other thanw. ... havea function word not linked to anything, betweentwo words linked to the same word. exact match feature We have a feature thatsums the number of words linked to identicalwords. This is motivated ... association with respect to a word in asentence pair to be the number of association types (word- type to word- type) for that word that havehigher association scores, such that words of bothtypes occur...
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Báo cáo khoa học: "Soft Syntactic Constraints for Word Alignment through Discriminative Training" pot
... bilin-gual word alignment finds word- to -word connec-tions across languages. Originally introduced as abyproduct of training statistical translation modelsin (Brown et al., 1993), word alignment ... im-proved alignments.2 Constrained Alignment Let an alignment be the complete structure thatconnects two parallel sentences, and a link beone of the word- to -word connections that makeup an alignment. ... traditional word alignment techniques.Otherwise, the features remain the same,including distance features that measureabsj|E|−k|F |; orthographic features; word frequencies; common-word...
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Báo cáo khoa học: "Boosting Statistical Word Alignment Using Labeled and Unlabeled Data" ppt
... methods for word alignment. In addition, we improve the word alignment results by combining the results of the two semi-supervised boost-ing methods. Experimental results on word alignment ... Statisti-cal Word Alignment. In Proc. of the 10th Machine Translation Summit, pages 313-320. Hua Wu, Haifeng Wang, and Zhanyi Liu. 2005. Alignment Model Adaptation for Domain-Specific Word Alignment. ... train the alignment models with unlabeled data. A question about word alignment is whether we can further improve the performances of the word aligners with available data and available alignment...
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Báo cáo khoa học: "Using Similarity Scoring To Improve the Bilingual Dictionary for Word Alignment" doc
... language word. is expressed as follows: a word qualifies for clus-tering ifAs before, are all the target language wordsthat cooccur with source language word .Similarly to the most frequent words, ... contain one word. Then the similarity score of themerged cluster will be the similarity score ofthe word pair.2. Merge a cluster that contains a single word and a cluster that contains wordsand ... the -word cluster, av-eraged with the similarity scores between thesingle word and all words in the cluster. Thismeans that the algorithm computes the similar-ity score between the single word...
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Báo cáo khoa học: "Combining Clues for Word Alignment" pdf
... optimal alignment. Section 2 describes the clue alignment modeland ways of estimating parameters from associ-ation scores. Section 3 introduces the alignment approach which is based on word alignment ... an alignment clue for the cor-responding word pairs. The likelihood of eachtranslation alternative can be weighted, e.g., byfrequency (if available).2.3 Clue CombinationsSo far, word alignment ... therefore,they can be dismissed in the alignment process.3 Clue Alignment Word alignment clues as described above can beused to model the relations between words oftranslated texts. Parameters...
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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 ... comparison of five alignment spaces,and show that limiting search w ith an ITGreduces error rate by 10%, while a D-ITGproduces a 31% reduction.1 IntroductionBilingual word alignment finds word- level...
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Báo cáo khoa học: "Unsupervised Word Alignment with Arbitrary Features" potx
... problemsfor word alignment models since, unlike English,Czech words have a complex inflectional morphol-ogy, and the syntax permits relatively free word or-der. For this language pair, we evaluate alignment error ... commen-tary (3.1M words),9and an Urdu-English corpus(2M words) provided by NIST for the 2009 OpenMT Evaluation. These pairs were selected sinceeach poses different alignment challenges (word or-8This ... alignments. One is the aver-age alignment “fertility” of source words that occuronly a single time in the training data (so-called ha-pax legomena). This assesses the impact of a typicalalignment...
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- flow network models for word alignment
- improving domainspecific word alignment
- word alignment using labeled
- word alignment in englishhindi parallel corpus
- yet another word alignment tool
- web by word alignment
- learning itgbased word alignment
- application to word alignment
- mining parenthetical translations from the web by word alignment
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