Báo cáo khoa học: "Boosting-based parse reranking with subtree features" docx

... can use the all-subtrees repre-sentation without loss of efﬁciency.3 RankBoost with subtree featuresA simple question related to kernel-based parse reranking asks whether all subtrees are really ... boost-ing for parse reranking. Several parsers have beenproposed that utilize the all-subtrees representa-tion (e.g., tree kernel and data oriented parsing).This paper argues that such an all-subtrees ... extremelysparse solution and automatically eliminates redun-dant subtrees. With the DOP methods, (Bod, 2001)also employs constraints (e.g., depth of subtrees) to¶We ran these tests on a Linux PC with...

Tài liệu Báo cáo khoa học: "K-means Clustering with Feature Hashing" docx

... authors also justiﬁed theirmethod by showing that with feature hashing, dot-product is unbiased, and the length of each vectoris well-preserved with high probability under someconditions.Plausibly ... explain in detail. In NLP, features can beoften expediently expressed with strings. For in-stance, a feature ‘the current word ends with -ing’can be expressed as a string cur:end:ing (herewe suppose ... γ−1Ψ−2where 0 < γ <= 1, with probability at least 1 −γ, RSS is additively distortedby .Proof. Note that a hashed feature map φ(h,ξ)is lin-ear, since φ(x) = Mx with a matrix M suchthat...

Báo cáo khoa học: "Unsupervised Word Alignment with Arbitrary Features" potx

... jump conjoined with an indicator feature for the target length n, the dis-cretized jump feature conjoined with the class of saj,and the discretized jump feature conjoined with theclass ... California.K. Gimpel and N. A. Smith. 2009. Cube summing, ap-proximate inference with non-local features, and dy-namic programming without semirings. In Proc. ofEACL.N. Habash and F. Sadat. 2006. Arabic ... l1-regularized log-linear models with cumulative penalty. In Proc. ofACL-IJCNLP.A. Venugopal, A. Zollmann, N. A. Smith, and S. Vogel.2008. Wider pipelines: n-best alignments and parsesin MT training....

Báo cáo khoa học: "EFFICIENT INCREMENTAL PROCESSING WITH CATEGORIAL GRAMMAR" docx

... allows a subject NP to com- bine with a transitive verb before the verb has com- bined with its object. In (3b), a sentence em- bedding verb is composed with a raised subject NP. Note that ... anything that can be proven with x can equivalently be proven with y. (16) x y X 0 Z Normalisation and the Dependency Calculus These efficiency problems for parsing with the DC can be seen ... the DC can be seen to consist of a number of binary 'subtrees', each of the form (16). If we sub- stitute each binary subtree with its NF combination in W, this gives a proof of Xlt,...

Báo cáo khoa học: "Unsupervised Relation Discovery with Sense Disambiguation" docx

... argument areadded with preﬁx “lc:”. Similarly the two words tothe right of the destination arguments are added with preﬁx “rc:”.Each document in the NYT corpus is associated with many descriptors, ... pattern senses, we merge them intoclusters of different patterns with a similar sense.We employ hierarchical agglomerative clustering with a similarity metric that considers features suchas the ... com-pare our approach with several baseline systems, in-cluding a generative model approach, a clusteringmethod that does not disambiguate between senses,and our approach with different features....

Báo cáo khoa học: "Language-Independent Parsing with Empty Elements" docx

... VBZ. is. WHNP. WP. who(a) (b)Figure 2: English parse tree with empty elements marked. (a) As annotated in the Penn Treebank. (b) With emptyelements reconﬁgured and slash categories added.where ... 终止zhōngzhǐsuspend. ADVP. AD. 暂时zànshífor now. NP. NONE *pro*Figure 1: Chinese parse tree with empty elements marked.The meaning of the sentence is, “Implementation of thelaw is ... jointly with it, not addedin afterwards. Moreover, we expect empty-elementrecovery to improve as the parsing quality improves.Our method makes use of a strong syntactic model,the PCFGs with...

Báo cáo khoa học: "Compiling Regular Formalisms with Rule Features into Finite-State Automata" doc

... is associated with a feature structure of its own. What is meant by 'rule features are satisfied'? Regular grammars which make use of rule features normally interact with a lexicon. ... triggered, [cat=verb] of the rule must match with [cat=verb] of the lexical entry {clvc2vc3}, and [measure=pa"el] of the rule must match with [measure=(p'al,pa"el)] of the ... Rules Let r' represent the center of the rule with the cor- rect lexical expressions and the incorrect surface ex- pressions with respect to ,'r*, r' = Proj'ectl(r}...

Tài liệu Báo cáo khoa học: "Learning Parse and Translation Decisions From Examples With Rich Context" pdf

... terministic parser applies a sequence of parse actions to the parse structure. The most frequent parse ac- tions are shift, which shifts a frame from the input list onto the parse stack or ... Figure 1: Example of a parse action (simplified); boxes represent frames The central data structure for the parser consists of a parse stack and an input list. The parse stack and the input ... the sentence is fully parsed. At least for the very first sentence, the supervisor actu- ally has to type in the entire parse action sequence. With a growing number of parse action examples...

Tài liệu Báo cáo khoa học: An allosteric DNAzyme with dual RNA-cleaving and DNA-cleaving activities doc

... allostericDNAzyme with dual RNA-cleaving and DNA-cleaving activities is verychallenging. We used an in vitro-selected pistol-like (PL) DNAzyme as aDNA scaffold for designing a DNAzyme with dual catalytic ... As compared with PL DNAzyme, DRc DNA-zyme function seemed to have decreased sensitivity tothe reaction temperature. DRc DNAzyme exhibited abroad functional range for temperature, with optimumactivity ... L-ascorbate inthe reaction. Lanes M I and M II were loaded with 5¢-32P-labeled synthetic DNAs of different lengths as indicated, each with a sequence thatcorresponded to the respective 5¢-terminus...

Tài liệu Báo cáo khoa học: DNA modiﬁcation with cisplatin affects sequence-speciﬁc DNA binding of p53 and p73 proteins in a target site-dependent manner pptx

... cisplatin DNA treatmentcorrelated with the occurrence of sequence motifs forming stable bifunc-tional adducts with the drug (namely, GG and AG doublets) within thetarget sites. Binding of ... protein with cer-tain response elements can be controlled by changes inDNA topology inducing formation of non-B DNAstructures within the binding sites [11,12]. Interactionsof p53 with DNA ... was observed with the anticancer tri-nuclear platinum complex BBR3464 but not with theclinically ineffective transplatin. Quite recently, it hasbeen shown that DNA modiﬁcation with a transplatinanalog,...

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