Tài liệu Báo cáo khoa học: "Efficient probabilistic top-down and left-corner parsingt Brian Roark and Mark Johnson Cognitive and Linguistic " pptx

... Efficient probabilistic top-down and left-corner parsingt Brian Roark and Mark Johnson Cognitive and Linguistic Sciences Box 1978, Brown University Providence, RI 02912, USA brian- roark@ brown, ... panded, as well as a history, probability, and FOM. The highest ranked analysis is popped from the pending heap, and the category at the top of its stack is e...

Ngày tải lên: 20/02/2014, 19:20

... origi- nal PS, allows us to convert every PS candidate to a standard projective DS, and from this represen- tation we can in turn compute the standard bench- mark evaluation for DS, i.e. unlabeled attachment score 10 (UAS) ... types: standard and junction blocks. Both types may contain any sequence of func- tional words. Standard blocks (depicted as black boxes) represent the elementary...

Ngày tải lên: 20/02/2014, 04:20

... Collins and Brooks, 1995; Chelba and Jelinek, 1998). 457 lows (Harrison, 1978; Hopcroft and Ullman, 1979). A context-free grammar (CFG) is a tuple G = (VN, VT, P, S), where VN and VT are ... entire grammar H. To generate, we ex- pand the start word $ E VT into xSy for some (x, y) E L(H$), and then recursively expand the words in strings x and y. More formally, given H, we...

Ngày tải lên: 20/02/2014, 19:20

... matrix with and with since both and contain negative values and are not prob- ability distributions. However, using equations 3 and 4, we can attach a probabilistic interpretation to LSA, and then ... example through better initialization methods. Hofmann (1999) and Brants (2002) averaged re- sults from five and four random initializations, re- spectively, and empirically fou...

Ngày tải lên: 22/02/2014, 02:20

... A PROBABILISTIC APPROACH TO GRAMMATICAL ANALYSIS OF WRITT!N ENGLISH BY COMPUTER. Andrew David Beale, Unit for Computer Research on the ~hglish I,~_~Zt.zage, University of Lancaster, Bowland ... phrase and clause tags using a probabilistic system similar to word tagging. It is hoped that the entire corpus will eventually be parsed. THE LOB CORPUS The LOB Corpus (Johansson, Leec...

Ngày tải lên: 22/02/2014, 09:20

... of open and close brackets and con- stituent markings - each of these sequences is, for historical reasons, called a "T-tag". A T-tag consists of a left-hand and a right- hand part. ... tentative sequence of markings for the type and boundaries of the constituents. Since the beginnings of constituents tend to be marked, but not the ends, this sequence of markings wil...

Ngày tải lên: 22/02/2014, 09:20

... young seedlings and vascular tissues of leaves and roots. Using both helps mutants and overexpression lines, we observed that, in the low-K + condition, AtHELPS affected Arabidopsis seed germination and ... compilation ª 2011 FEBS Figs 3 and S1, the AtHELPS transcript was upregulat- ed by 100 lm K + ,2mm CsCl, zeatin and cold treat- ments, and downregulated by 100 mm K + and 2...

Ngày tải lên: 14/02/2014, 18:20

... amorphous aggregates and fibrillar deposits. Fig. 5. Aggregation of a-synuclein after 240 h. Samples containing MPTP (A and C) and MPP + (B and D) were analysed by SDS ⁄ PAGE (A and B) on 5–15% crosslinked ... 100 lM MPTP and 50 lM dopamine (F), in the presence of 200 lM MPTP and 50 lM dopamine (G), in the presence of 100 l M MPP + and 50 lM dopamine (H) and in the presence o...

Ngày tải lên: 14/02/2014, 19:20

... rate, using excitation and emission wave- lengths of 450 ⁄ 490 nm and 531 nm, respectively. Buffer com- position and temperature were identical to that used for both DWm and Mg 2+ fluorescence ... cyclosporin A and CYPD KO mouse liver mitochondria, and the effect of oligomycin (olgm). *Statistically significant (Tukey’s test, P < 0.05). (D) Lanes 1 and 2 represent CYPD-WT and...

Ngày tải lên: 14/02/2014, 19:20

... (lanes 2 and 4) and 32 P-labeled ETS-1 (lanes 3 and 4) or ssDNA L (lanes 1 and 2). (B) EMSA was per- formed with EWS (lanes 2, 4 and 6) and 32 P-labeled Htelo (lanes 3 and 4), dsHtelo (lanes 5 and ... (lanes 2 and 4) and 32 P-labeled Htelo (lanes 1 and 2) or rHtelo (lanes 3 and 4). (B) EMSA was performed with RGG3 (lanes 2 and 4) and 32 P-labeled rHtelo (lanes 1 a...

Ngày tải lên: 15/02/2014, 01:20