Tài liệu Báo cáo khoa học: "Modelling the substitutability of discourse connectives" doc

... substituted for another while preserving the meaning of a text. Knott (1996) studies the substitutability of discourse connectives, and proposes that substitutability can motivate the- ories of discourse ... with the distributional similarity of the lexical items. 2.2 Substitutability The notion of substitutability has played an impor- tant role in theories...

Ngày tải lên: 20/02/2014, 15:20

... paper, we analyze the following three model families: In the HMM, the input x is a sequence of words and the output y is the corresponding sequence of part -of- speech tags. In the PCFG, the input x ... that the first iteration of EM reinforces the systematic mis- takes of the supervised initializer. In the first E-step, the posterior counts that are computed sum...

Ngày tải lên: 20/02/2014, 09:20

... function of the CXXXC motif of human Sco proteins could therefore be impli- cated not only in the maturation of the Cu A site of Cox2 but also in the maintenance of cellular copper homeostasis. The ... Blackburn NJ (2011) The essential role of the Cu(II) state of Sco in the maturation of the Cu(A) center of cytochrome oxi- dase: evidence from H135Met and H1...

Ngày tải lên: 14/02/2014, 18:20

... procedure. The finding that the effect of CoASH depends on the presence of ATP (although not of other NTPs such as GTP and UTP; not shown) suggests that it is indirectly mediated via the formation of ... 20%, despite the presence of ATP- Mg. It is shown below that this is due to loss of the inhibitory effect of ATP-Mg, consequent to the removal of a heat-stable co...

Ngày tải lên: 19/02/2014, 07:20

... propionyl-CoA in the DmcsA-strain, the activity of methylisocitrate lyase is twice as high than that of the wild-type. The addition of acetate to these media not only lowered the propionyl-CoA ... for the initial decrease of the oxalo- acetate concentration in t he equilibrium due to the accumulation of NADH [25]. Lineweaver–Burk diagrams were obtained b y use of...

Ngày tải lên: 19/02/2014, 16:20

... argument. On the target side, the trans- lation of the verbal predicate, the translation of the head word of the argument, as well as the boundary words of the translation of the argument are used as features. 4.3 ... both the source and target side. On the source side, the fea- tures include the verbal predicate, the semantic role of the argument, t...

Ngày tải lên: 19/02/2014, 19:20

... the upper bound length of entities, N is the length of sentence and K is the size of label set. And that of training in first order semi-CRFs is O(K 2 LN). The increase of the cost is used to transfer ... “O”, which indicates a non-named entity. For 98.0% of the named entities in the training data of the shared task in the 2004 JNLPBA, the label of the pre...

Ngày tải lên: 20/02/2014, 12:20

... by the need to balance depth of analysis against the size of the deriva- tion space. On the Susanne corpus, the geometric mean of the number of analyses for a sentence of length n is 1.31 n . The ... fifth of DepBank is held out to optimize the speed and accuracy of the three systems. They conclude from the results of these experiments that the cut-down XL...

Ngày tải lên: 20/02/2014, 12:20

... derivations, the probability of a tree is the sum of the probabilities of the derivations producing that tree. The probability of a derivation is the product of the subtree probabilities. The original ... consists of the computation of the shortest derivations and the extraction of subtrees, UML- DOP involves iterative training of the parameters....

Ngày tải lên: 20/02/2014, 12:20

... the alternative of relaxing the pars- ing constraints would appear to be a dead end in the context of the VERBMOBIL architecture. In the first place, the chances of locating the best grammatical ... overall, regardless of their quality. Either of these conditions could prove fatal. This paper focuses on the aspects of the VERBMOBIL analysis component whic...

Ngày tải lên: 20/02/2014, 19:20