Báo cáo khoa học: "Joint and conditional estimation of tagging and parsing models∗" docx

... Joint and conditional estimation of tagging and parsing models ∗ Mark Johnson Brown University Mark Johnson@Brown.edu Abstract This paper compares two different ways of estimating statistical ... P(y) and conditional likelihood P(y|x) of the ATIS1 training trees, and the marginal likeli- hood P(x) of the ATIS1 training strings, as well as the la- belled precision...

Ngày tải lên: 08/03/2014, 05:20

... for each edge of the graph. 6: Refine the scores  S 1 and  S 3 of the k 2 sentiment and topic word candidates using Eqs. (5) and (6) iteratively. 7: Select k 1 new sentiment words and k 1 new ... set of nodes represents topic words, including new topic candi- dates and words in the lexicon C, and the other set of nodes represents sentiment words, including new sentiment c...

Ngày tải lên: 19/02/2014, 19:20

... features of the LPO and MPO catalytic cycle, such as the existence of Compound I and Compound II isomers and the identification of their spectroscopic properties. After addressing each of these ... each of these questions, we will propose a new hypothesis that describes an integrated vision of the catalytic mechanism of MPO and LPO. A brief survey of the absorption feat...

Ngày tải lên: 20/02/2014, 02:21

... 1994)): measure a mile of cable, typical partitives a loaf of bread, a slice of cake, and general partitives: a piece/bit /of an item of X. In the syntactic structure of a partitive structure, ... different syntactic constraints of the two languages. We present a contrastive analysis of the syntactic realizations of possessives and par- titives in Hebrew and...

Ngày tải lên: 08/03/2014, 06:20

... thermodynamics and kinetics of the binding of guanidines and N-hydroxy- guanidines to iNOS. Removal of the a-amino or a-carboxylate moiety of l-Arg has important effects on the ability of the resulting ... K d and k off . The fol- lowing experiments were performed as a first approach to find the variation in k off as a function of the iNOS substrate structure. Kinetics of th...

Ngày tải lên: 16/03/2014, 22:20

... Li Deng Microsoft Research Microsoft Research One Microsoft Way, Redmond, WA, USA One Microsoft Way, Redmond, WA, USA xiaohe@microsoft.com deng@microsoft.com Abstract This paper ... practice, this approach only works with a handful of parameters. More closely related to our work, Liang et al. (2006) proposed a large set of lexical and Part -of- Speech features in addi...

Ngày tải lên: 23/03/2014, 14:20

... properties of individual non-projective edges (cf. Definition 3); and they take into account levels of nodes in dependency trees explicitly. None of the constraints and measures in Kuhlmann and Nivre (2006) ... measure, level signatures of non-projective edges, combining lev- els of nodes with the partitioning of gaps of non- projective edges into components. We derive a fo...

Ngày tải lên: 23/03/2014, 18:20

... pars- ing (Ho and Chan, 1999; Costa et al., 2001), and only marginally below the current state -of- the-art for parsing the Penn Treebank. We propose a hybrid parsing system consist- ing of two components, ... stack with a new node which is its parent and choose the label of that node (steps 2, 3, and 5), and pop a node from the stack and attach it as the child of the no...

Ngày tải lên: 24/03/2014, 03:20

... with water at 4 °C and separates into a water-rich and detergent-rich phase at 23 °C [20], and (b) by using the interface of water and a low polarity organic solvent such as chloroform as an amphiphilic ... 390 nm a mixture of the dye and protein at concentrations of 50 l M and 90 lgÆmL )1 , respectively. The emission was recorded in the wavelength range of 410–600 nm at a...

Ngày tải lên: 31/03/2014, 09:20

... In the algorithm, P i and N i are sets of fluent and non- fluent sentences that can be contrasted, e.g. P i is a set of fluent translations and N i is a set of non-fluent translations of a same source ... limiting the problem of poor estimation of weights for rare features. Finally, we extended confidence-weighted learning with soft margins to handle the case where labels of...

Ngày tải lên: 17/03/2014, 00:20