Báo cáo khoa học: "Exploring Deterministic Constraints: From a Constrained English POS Tagger to an Efficient ILP Solution to Chinese Word Segmentation" ppt

... formulated as character tagging, analogous constraints can be learned with the same templates as English POS tagging. High-quality constraints can be learned with respect to a special tagset, ... (CWS) 3.1 Word segmentation as character tagging Considering the ambiguity problem that a Chinese character may appear in any relative position in a word and the out-of-vocabulary (...

Ngày tải lên: 07/03/2014, 18:20

... These works annotated temporal relations between events and times, but low inter-annotator agreement made many TimeBank and TempEval tasks difficult (Boguraev and Ando, 2005; Verha- gen et al., 2007). ... lemmas and part-of-speech tags, e.g. took, take, VBD and began, begin, VBD. • All words, lemmas and part-of-speech tags in the verb phrases of each event, e.g. took, take, VBD and began, to,...

Ngày tải lên: 08/03/2014, 01:20

... peptide atoms) and r j is the standard deviation of B factors. The normalized B factors have a zero mean and unit variance. All atoms that satisfy B z ‡ 4 are treated as outliers and discarded. After ... removed, and atomic B factors reset to an appropriate value as suggested from the Wilson plot. An initial solvent model was built using arp ⁄ warp [39], which was then manually chec...

Ngày tải lên: 14/02/2014, 19:20

... (N 2 O) to dinitrogen by Bacteria and Archaea. Adv Microb Physiol 52, 107–227. 24 Uthandi S, Saad B, Humbard MA & Maupin-Furlow JA (2010) LccA, an archaeal laccase secreted as a highly stable ... of plant ascorbate oxidase [33], human ceru- loplasmin [34], CotA laccase from B. subtilis [35], and McoA from A. aeolicus [4], and they apparently cor- relate with a structural orga...

Ngày tải lên: 18/02/2014, 04:20

... normalize it to agreed standards and finally transfer these data to publicly available data- bases to make them accessible. To facilitate the dissemination of data, a number of initiatives have been ... steps automatically, ensuring that both experimental data and derived kinetic parameters are captured and stored immediately upon acquisition and analysis. Data access Access to the...

Ngày tải lên: 18/02/2014, 04:20

... Raghavan A, Tahiliani M, Zhang X, Qin J, Hogan PG, Rao A (2000) Concerted dephosphoryla- tion of the transcription factor NFAT1 induces a conformational switch that regulates transcriptional activity. ... effec- tive rate constants of phosphorylation and dephosphor- ylation, a ran and b ran , defined as follows: a ran ¼ðN À n þ 1 a and b ran ¼ nb; ð6Þ where a and b are as given in...

Ngày tải lên: 18/02/2014, 08:20

... on biochemical and structural data, a general catalytic mechanism was proposed for aminopeptidases that involves an acidic residue acting as a general acid ⁄ gen- eral base and a di-nuclear metal center ... activates a zinc-bound water molecule and an addi- tional residue (Tyr246) polarizes the carbonyl carbon and stabilizes the transition state. Glu131 is thought to act as a...

Ngày tải lên: 19/02/2014, 02:20

... Kitagawa K, Matsuno K, Matsumoto A, Yoshida A, Nakayama K, Nakayama K & Kawa- moto T (2002) Diminished alcohol preference in trans- genic mice lacking aldehyde dehydrogenase activity. Pharmacogenetics ... Roman J, Gimenez A, Lluis JM, Gasso M, Rubio M, Caballeria J, Pares A, Rodes J & Fernandez-Checa JC (2000) Enhanced DNA binding and activation of tran- scription factors NF-kappa...

Ngày tải lên: 19/02/2014, 06:20

... GAC ACA CAT CCC C; and reverse primer, GAT CGG TAC CTC ATT ACA GAG GAG GGA TAT GGG GAA C. The PCR reaction was done as described above. The amplified PCR product was inserted into the EcoRI and ... lactose as a carbon source, 1% potassium phthalate as a buffering agent (pH 5.5), 0.1 mm CuSO 4 and 1% tyrosine as an indicator substrate was used. The trans- formants were streaked on the pla...

Ngày tải lên: 19/02/2014, 06:20

... Sequence analysis indicates that the yeast epimerase has an N-terminal domain (residues 1–377) that shows significant similarity with Escherichia coli and human UDPgalactose 4-epimerase, and a C-terminal domain ... glycolysis, b- D -galactose needs to be transformed to a- D -galactose before being phosphorylated by galactokinase. Mutarotase catalyzes the interconversion of b- D -gala...

Ngày tải lên: 19/02/2014, 12:20