Báo cáo khoa học: "Efficient Unsupervised Discovery of Word Categories Using Symmetric Patterns and High Frequency Words" ppt

... 2006. c 2006 Association for Computational Linguistics Efficient Unsupervised Discovery of Word Categories Using Symmetric Patterns and High Frequency Words Dmitry Davidov ICNC The Hebrew University Jerusalem ... candidates are discovered us- ing meta -patterns of high frequency and content words, and symmetric patterns are discovered us- ing simple graph-...

Ngày tải lên: 23/03/2014, 18:20

... after 16, 24 and 48 h of culture using trypan blue staining. (C) Cells were treated with 0.5, 1 and 2 lg of hpST3dODN and 1 and 2 lg of control ODN for 6 h or with lipids only; after 48 h of culture, ... activated forms of STAT3 and STAT1. The actions of STAT3 and STAT1 are highly entangled, they also have antagonistic activities, and they regulate each others acti...

Ngày tải lên: 18/02/2014, 08:20

... structure of the reverse-joined ribozyme unit for twin ribozyme design consists of two domains joined by a single-stranded linker of eight adenosine residues and binds the 3¢-terminal part of its ... Addition of the fragment S20 cp led to the for- mation of new products detected as three additional bands (lanes 3 and 4). These signals correspond to the 29- and 35-mer resulti...

Ngày tải lên: 20/02/2014, 01:20

... 2: Results of simulating many iterations of U  , for k = 255, and various values of s and u. Algorithm 1 RESERVOIRUPDATE(n, k, m, σ, s) Parameters: n : size of stream so far k : size of reservoir, ... e.g.: five updates of 1, or three updates of -1, using a single estimate. Consider a situation in which we have a reservoir of size k with some current value of s, 0 ≤ s...

Ngày tải lên: 20/02/2014, 04:20

... 4827 MINIREVIEW Efficient and targeted delivery of siRNA in vivo Min Suk Shim 1 and Young Jik Kwon 1,2,3 1 Department of Chemical Engineering and Materials Science, University of California, Irvine, ... with a strand of siRNA, and the other siRNA strand was subsequently annealed to the aptamer-conjugated strand. These aptamer–siRNA conjugates were able to access HIV- infected c...

Ngày tải lên: 06/03/2014, 01:23

... sibling grandchild tri-siblinggrand-sibling Specifically, Sections 4.1, 4.2, and 4.3 describe parsers that, respectively, factor trees into grand- child parts, grand-sibling parts, and a mixture of grand-sibling ... two interrelated types of dynamic-programming struc- tures: complete spans, which consist of a head- word and its descendents on one side, and incom- plete spans, w...

Ngày tải lên: 07/03/2014, 22:20

... (Tsuruoka and Tsujii, 2005; Sha and Pereira, 2003; Ninomiya et al., 2006). In POS tagging, we used unigrams of the current and its neighboring words, word bigrams, prefixes and suffixes of the current word, ... the n-th column such that y n ∈ I(z n ), and we can use λ(z n ) and ¯ λ(z n ) instead of λ(y n ) and ¯ λ(y n ). We compute λ(y n ) and ¯ λ(y n ) by using the f...

Ngày tải lên: 07/03/2014, 22:20

... is a conditional random field based model. For a rule application, we allow arbitrary features to be defined over the rule categories, span and split point indices, and the words of the sentence. ... likelihood of the parse tree, given the sentence, not joint like- lihood of the tree and sentence; and (b) probabil- ities are normalized globally instead of locally – the graphica...

Ngày tải lên: 08/03/2014, 01:20

... for the inhibition of the biosynthesis of b-secretase and for the exclusion of the formation of toxic b-amyloid peptides in HEK293 cells. Materials and methods Construction of plasmids for ribozyme ... decomposition of the RNA. Determination of the level of BACE mRNA and ribozyme RNA expression in mammalian cells The level of BACE mRNA and ribozyme RNA was monitored...

Ngày tải lên: 08/03/2014, 08:20

... fan-out and complexity of grammars read off from the treebank. This new heuristic provides a significant improvement: in- stead of a fan-out of 9 and a parsing complexity of 19, we obtain values of ... until now, the length of sentences needed to be restricted. In the case of Kallmeyer and Maier (2010) and Evang and Kallmeyer (2011) the limit was 25 words. Maier (2010)...

Ngày tải lên: 08/03/2014, 21:20