Báo cáo khoa học: "Baselines and Bigrams: Simple, Good Sentiment and Topic Classification" ppt

... 2012. c 2012 Association for Computational Linguistics Baselines and Bigrams: Simple, Good Sentiment and Topic Classification Sida Wang and Christopher D. Manning Department of Computer Science Stanford ... longer doc- uments, for sentiment, topic and subjectivity clas- sification, and is often better than previously pub- lished results. Therefore, NBSVM seems to be an a...

Ngày tải lên: 30/03/2014, 17:20

... k 2 sentiment words and topic words with highest scores as candidates. 5: Construct a bipartite graph between sentiment and topic words on D l T and the k 2 sentiment- and topic- word can- didates, and calculate ... denotes w i a topic word, and y i = 3 denotes w i neither a sentiment nor topic word. Our goal is to predict labels on D T to extract topic and se...

Ngày tải lên: 19/02/2014, 19:20

... semantic role label- ing (Swier and Stevenson, 2004; Gildea and Juraf- sky, 2002), natural language generation for machine translation (Habash et al., 2003), and deriving pre- dominant verb senses ... extend- ing existing lexicons (Korhonen and Briscoe, 2004), building and tuning lexical information specific to different domains (Korhonen et al., 2006), and boot- strapping verb lex...

Ngày tải lên: 20/02/2014, 09:20

... k items and 1(x k ∈ G) is an indicator function which is 1 if x is in the gold standard list of DEOs and 0 otherwise. DLD09 simply evaluated the top 150 output DEO candidates by their systems, and ... extracted NPI contexts N and they contain tokens(C) and tokens (N ) tokens respectively. Let y be a candidate DEO, count C (y) be the uni- gram frequency of y in a corpus, and count...

Ngày tải lên: 31/03/2014, 20:20

... results and Ta- ble 3 shows the final NER F1 results. We compare to the state-of-the-art methods of Ando and Zhang (2005), Suzuki and Isozaki (2008), and for NER—Lin and Wu (2009). Tables 2 and 3 ... tasks. Lin and Wu (2009) finds that the representations that are good for NER are poor for search query classification, and vice-versa. We apply clus- tering and distributed repre...

Ngày tải lên: 20/02/2014, 04:20

... xy- lanases and other glycoside hydrolases will need to be determined. Materials and methods Materials All chemicals, solvents and reagents were purchased from Sigma-Aldrich (Bornem, Belgium) and are ... were pooled and dialyzed against a sodium acetate buffer (200 mm, pH 4.0). XBS and XAN All purified XBS, XAN and mutant variants were free from protein impurities as verified by S...

Ngày tải lên: 14/02/2014, 19:20

... residues 79 and 80, and Asp25, respectively. Mutation to smaller side chains caused loss of internal hydrophobic interac- tions in the PR I50V and PR I54V structures. PR I84V , PR V32I and PR I50V showed ... different inter- actions between PR and inhibitors, the absence of the C-HÆÆÆO contact between flap residue 50 and Thr80 in PR I50V –APV, and its presence in PR I50V –SQV an...

Ngày tải lên: 18/02/2014, 04:20

... kinase and PI3K ⁄ Akt and increase phosphorylation of GSK3b on Thr390 and Ser9. SB203580 and LY294002 pre- vented a-defensin-induced increases in the protein contents of Thr390-phosphorylated and ... a-defensin-1 and a-defensin-2 induced increases in the phosphorylation of GSK3b and b -catenin activation and that inhibition of b -catenin activation prevented a-defensin-induced...

Ngày tải lên: 18/02/2014, 06:20

... content (oxidized and reduced forms) was assayed in the cells immedi- ately after incubation (6 h), and 1 and 2 h after reoxy- genation (Fig. 4). Under normoxia, intracellular reduced and oxidized glutathione ... intra- cellular and extracellular compartments: HepG2 cells were incubated for 6 h under normoxic and hypoxic conditions in the absence and presence of pyruvate (1 m M)...

Ngày tải lên: 18/02/2014, 16:20

... significant effects either. The dissociation rate constants for DHNP and DHMP were estimated from those for NP and MP and the difference between HP and HPO and finalized by iterative fittings as described in the ... NP, and MP were purchased from Schircks Laboratories (Jona, Switzerland). Restriction enzymes and T4 ligase were purchased from New England Biolabs (Ipswich, MA, USA)....

Ngày tải lên: 19/02/2014, 00:20