Tài liệu Báo cáo khoa học: "Improving the Scalability of Semi-Markov Conditional Random Fields for Named Entity Recognition" pdf

... is “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 preced- ing entity was “O”. In order to ... than the system without it (the p-value is less than 1.0 < 10 −4 ). The result of the preceding entity information improves the performance. On the other...

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 ... assembly of cbb 3 oxidase, but rather is required for the maturation of the Cu A -containing COX which is predominant for aerobic growth, thus leaving open the...

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 ... nmolÆmin )1 Æmg )1 protein irrespective of the pres- ence or absence of xenobiotics (not shown), therefore being much lower than the rate of glucuronate formation fro...

Ngày tải lên: 19/02/2014, 07:20

... strong accumulation of 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 ... compensates for the initial decrease of the oxalo- acetate concentration in t he equilibrium due to the accumulation of NADH [25]. Lineweaver–Bur...

Ngày tải lên: 19/02/2014, 16:20

... and the boundary words of 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 A tgt the translation of A p the translation of A h the leftmost word of the translation of A the rightmost word of the translation...

Ngày tải lên: 19/02/2014, 19:20

... 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 ... summarize the predictions of the supervised system. If these match the empirical counts, then the M-step does not change the parameters. But if the supervised s...

Ngày tải lên: 20/02/2014, 09:20

... subcategorization infor- mation in the PoS tags and 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 ... parser to the publically available version of Collins’ parser. One fifth of DepBank is held out to optimize the speed and accuracy of the three sys...

Ngày tải lên: 20/02/2014, 12:20

... sum of the probabilities of the derivations producing that tree. The probability of a derivation is the product of the subtree probabilities. The original DOP model in Bod (1998) takes the occurrence ... consists of the computation of the shortest derivations and the extraction of subtrees, UML- DOP involves iterative training of the parameters. On...

Ngày tải lên: 20/02/2014, 12:20

... q   for the first task, and 10,912 triples for the second task. The co-occurrence data from the previous section were re-used. These were used to calculate D(p||q) and V (p, q). Both of these ... µ syn , for ex- ample, denotes the mean of the Gaussian model for SYNONYMY. Next the likelihood ratio for p and q was divided by that for p and q  . If this value was...

Ngày tải lên: 20/02/2014, 15:20

... path of a given WHG depends on the length of the input and on the time already used. After the pars- ing of one path is finished, the passive edges of the chart form a directed acyclic graph ... representation). Clearly, before computing the shortest path, the distance of a vertex to one of the start ver- tices is infinity, except for the start vertices,...

Ngày tải lên: 20/02/2014, 19:20