Báo cáo khoa học: "Optimizing Question Answering Accuracy by Maximizing Log-Likelihood" pot

... from two TFSs. That information in- cludes typing (by unifying the types), feature values (by recursive unification), and structure sharing (by an equivalence closure taken over the nodes of the arguments). ... function δ f q specifies the node reachable from q by feature f when one exists. The path value partial function δ π q specifies the node reachable from q by following a path of f...

Ngày tải lên: 20/02/2014, 15:21

... output are compared to those in the reference transla- tions, frame by frame, argument by argument. The frame translation accuracy is a weighted sum of the number of correctly translated arguments. ... f-score, with respect to the preci- sion/recall for sentence translation accuracy as calculated by averaging the translation accuracy for all frames in the MT output across the numb...

Ngày tải lên: 07/03/2014, 22:20

... Because they not only been calcu- lated by language modeling view features, but also been maximized with statistical methods. Therefore the imprecise cases caused by special distribution in language ... paper: the first is a general lan- guage model approach proposed by Song and Croft (1999) and the second is a HMM approach by Miller et al. (1999). 2.1 A General Language Model fo...

Ngày tải lên: 08/03/2014, 01:20

... text-based chat interface. During the interaction, students can be asked two types of questions. Factual questions require them to name a set of objects or a simple prop- erty, e.g., “Which components ... performance of the system on these long-answer questions, since re- acting to them appropriately requires processing more complex input than factual questions. We collected a corpus of 35 di...

Ngày tải lên: 08/03/2014, 21:20

... active fractions was then con- firmed by SDS–PAGE. Standard enzyme assay Protein concentration was determined by the Bradford method using BSA as standard, or by UV-vis spectroscopy (e 600 nm =5· ... hybrid (lac131, lac232 and lac535) sequences are represented by rectangles of variable lengths. Recombinant junctions are indicated by vertical bars. (B) Representation of cupredoxin dom...

Ngày tải lên: 18/02/2014, 06:20

... plasma membrane allows polar- ity to be maintained by endocytic cycling. Curr Biol 13, 1636–1640. M. Lin et al. Sterol homeostasis modulation by Ste20p and Cla4p FEBS Journal 276 (2009) 7253–7264 ... homeostasis modulation by Ste20p and Cla4p M. Lin et al. 7264 FEBS Journal 276 (2009) 7253–7264 ª 2009 The Authors Journal compilation ª 2009 FEBS Modulation of sterol homeostasis by the...

Ngày tải lên: 18/02/2014, 13:20

... condition is characterized by progres- sive rigidity, first in the lower and later in the upper extremities. Both involuntary movements and rigidity may involve muscles supplied by cranial nerves, resulting ... initially manifested by ataxia, grand mal seizures and loss of previously learned speech. Spas- ticity is striking and seizures are common [26]. Approximately 95% of cases are cau...

Ngày tải lên: 18/02/2014, 14:20

... heat and low pH, and can also be activated by the pungent ingredient of hot chilli peppers, capsaicin, as well as by other plant toxins, the most potent of which is resiniferatoxin (RTX) [2]. ... highest potency. These AA metabolites can be produced by lipoxygenases that introduce molecular oxygen in a regio- and stereoselective dependent manner in AA released from the membrane by ph...

Ngày tải lên: 19/02/2014, 12:20

... The questions for the test were made up from the original Russian passage by two electrical engineers. They used multiple-choice questions with four pos- sible answers. The number of questions ... total of 41 questions. The same questions were used with human and ma- chine translations of a given passage. Prior to their use in the comprehension test, 27 sub- jects answered the quest...

Ngày tải lên: 19/02/2014, 19:20

... ligation by reverse-joined hairpin ribozymes Reverse-joined hairpin ribozymes, first introduced by Ohtsuka and colleagues [29,30], are derived from the conventional hairpin ribozyme by dissecting ... ⁄ HCl (pH 7.5) buffer was heated at 90 °C for 1 min followed by incuba- tion at 37 °C for 15 min. The cleavage reaction was started by addition of MgCl 2 and spermine. The final volume of...

Ngày tải lên: 20/02/2014, 01:20