Báo cáo khoa học: "Improving the Accuracy of Subcategorizations Acquired from Corpora" pdf

... 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

... 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 XLE parser is two-thirds the speed of ... 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...

Ngày tải lên: 20/02/2014, 12:20

... which of two verbs was the correct predicate for a given noun object. One verb v was the original from the source doc- ument, and the other v  was randomly generated. This was the first use of such ... no- table since the Google model only requires n-gram counts to implement. The Backoff Erk model is the best, using the Baseline for the majority of decisions and ba...

Ngày tải lên: 07/03/2014, 22:20

... 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

... 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...

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 ... resulting from acid hydrolysis of UDP- glucuronate, was measured. This value was subtracted from those found in the presence of liver extract. Note that the scale...

Ngày tải lên: 19/02/2014, 07:20

... determined by use of succinyl- CoA as the CoA-donor and a cetate as the acceptor, followed by the transfer from succinyl-CoA to propionate (% 35% of the former activity) and the transfer from propionyl-CoA ... 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 m...

Ngày tải lên: 19/02/2014, 16:20

... the 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 ... features from 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

... (e.g., the height of a person), while for others it is only the center of a distribution (e.g., the weight of a coffee cup). Questions with no trusted and exact answers were eliminated. From the ... value for the given object. During the first stage it is possible that we directly extract from the text a set of values for the requested object. The bounds processin...

Ngày tải lên: 20/02/2014, 04:20

... 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