Báo cáo khoa học: "Incremental Parsing with the Perceptron Algorithm" potx

... using the perceptron algorithm. We follow that paper in fixing the weight of the generative model, rather than learning the weight along the the weights of the other perceptron fea- tures. The value ... accommodate the perceptron feature weights. We first describe the parsing algorithm, and then move on to the baseline feature set for the perceptron model. 3.1 Pa...

Ngày tải lên: 23/03/2014, 19:20

... For other chains which start with S and end with “we”, the parser produces partial parse trees by using the chains. For the next word, the parser attaches the chain ⟨VP →VBP →describe⟩to the partial ... an auxiliary tree β having the same nonterminal symbol as η, i.e., combines the upper tree of σ with the root of β and the lower tree of σ with the foot of β. We...

Ngày tải lên: 17/03/2014, 02:20

... are either in the agenda if they end at the current position or they are in the S j set if they end at position j. The active items also keep only the dot position in the constituent because the ... ) ) The proof is by induction on the depth of the tree. If the tree has only one level then the function f does not have arguments and from the linearization defini- tion...

Ngày tải lên: 31/03/2014, 20:20

... any- thing in the unknown portion of the graph to affect the probabilities in the known portion of the graph. Therefore inference can be performed by simply ig- noring the unknown portion of the graph, ... RS(t  ) is the set of previous positions with edges from their state vectors to the state vector at t  , RD(t  ) is the set of previous positions with edges from...

Ngày tải lên: 23/03/2014, 18:20

... relationship between the multinomial param- eters of the two models. However, they represent the MR and NL with a single tree and apply tree walk- ing algorithms to extract them. Furthermore, they implement ... expand the i th child of the parent produced by rule m. Aside from ensuring the grammaticality of the generated MR, rules of this type also model the probability of...

Ngày tải lên: 19/02/2014, 19:20

Ngày tải lên: 20/02/2014, 18:20

... repre- senting the current utterance onto the stack, then 97 pops the top two tokens off the stack and pushes the non-terminal X; u-complete-X pops the top to- ken off the stack and pushes the non-terminal ... assume that the end of the dialog is given to the decoder 3 . Given that the classiers are error-prone in their assignment of labels, the parsing step of t...

Ngày tải lên: 22/02/2014, 02:20

... [12]. It was therefore interesting to compare the effect on cell adhesion of SHIP2 with the DProline SHIP2; we also compared the effect of SHIP2 with another construct that did not have the SHIP2 ... attached cells. Therefore, the control of SHIP2 (or his mutants) transfected cells could be the result of either the suggested conditions with no change in interpretation of...

Ngày tải lên: 07/03/2014, 12:20

... on the information present in the sentence, i.e. on the words themselves. The question then arises whether we could use this information directly, and thus save the explicit tagging step. The ... consists of the val- ues for all features (the columns) and the function- chunk code for the focus word. The features de- scribe the focus word and its local context. For the...

Ngày tải lên: 08/03/2014, 07:20

... tail. There is an unbroken reading frame of 162 amino acids that is continuous with the vector GAL4DBD and terminates with TGA (Fig. 2A) at nucleotide 487. Inspection of the sequence shows that the ... not shown) and together with HuCtBP2 represents the only Rp-interacting proteins identified in the human adult kidney library. AH109 cells only grow under stringent conditions wh...

Ngày tải lên: 16/03/2014, 11:20