Báo cáo khoa học: Using directed evolution to improve the solubility of the C-terminal domain of Escherichia coli aminopeptidase P Implications for metal binding and protein stability pptx

... compared with those of G270V, E406G, and R166G. Changes at the surface of the protein do not appear to be major contributors to the solubility of the AMPP fragments. The AMPP protein appears to ... ZnCl 2 in the dialysis buffer led to the precipitation of each of the three proteins. Neither the intact protein nor the Table 1. Sequence analysis...

Ngày tải lên: 23/03/2014, 07:20

... lists the improvement in precision and recall for each of the dictionaries. The table shows the values when the minscore score is set to 50, and up to 1 link was allowed per word. Furthermore, the ... 4: Performance of dictionaries Dict0.01 for up to one link per word rebuilding algorithm is independent of the actual word alignment method used. Furthermore, w...

Ngày tải lên: 08/03/2014, 07:20

... corresponding set of “relevant snippets,” we first apply the baseline tagger to the query and all the snippets. We match any query terms in these snippets, and copy over the POS tag to the matching ... strategies for se- lecting relevant snippets, such as selecting the snip- pets of the clicked results, using the top-10 results or using only the top result,...

Ngày tải lên: 16/03/2014, 20:20

... performed by applying possible paths con- necting them in a dependency graph. These paths are combined with part -of- speech information and also learned from the annotated corpus. To the best of ... the dependency relations between them. For each opinion target - opinion word pair, the shortest path connecting them is extracted from the dependency graph. A path consists of...

Ngày tải lên: 17/03/2014, 00:20

... by the HR system for a given segment scan. The conf is defined here as the ratio of the number of hypotheses in the N- best list that the word appears in to the total number of hypotheses. These ... Âςyr PZD PROB OK PROB PROB PROB PROB PROB PROB PROB OK OK PROB OK PROB PROB PROB DELX INS SUB DOTS SUB ORTH INS SUB SUB ORTH INS SUB Table 1: An example highlighting the d...

Ngày tải lên: 17/03/2014, 00:20

... 50% of the total 800) labeled instances per class, we achieve the maximum performance in most of the cases. To study the effect of source and target domain unlabeled data on the performance of ... dimensional latent mapping of fea- tures onto the space spanned by the base entries in the sentiment-sensitive thesaurus. The asymmetric property of the related...

Ngày tải lên: 20/02/2014, 04:20

... with a PCFG approximation to the adaptor grammar. This PCFG contains a production for each adapted subtree in the parses of the other strings in the training corpus. A final accept-reject step cor- rects ... cor- rects for the difference in the probability of the sam- pled tree under the adaptor grammar and the PCFG approximation. 3 Word segmentation with adaptor...

Ngày tải lên: 20/02/2014, 09:20

... results. The paper considers the reasons a principle- based approach to this problem should outperform corpus-based approaches, and speculates on the possibility of a hybrid approach. 1 Introduction ... doing the annotation put them there. This paper therefore explores a rule-based approach to empty category recovery, with two purposes in mind: first, to explore the...

Ngày tải lên: 20/02/2014, 16:20

... (S (NP the boy) (VP (V saw) (NP (NP the girl) (PP on (NP (NP the hill) (PP with a telescope))))))) The above bracketing restricts the parses to just the parse tree that corresponds to the ... chine parse), and Precision (the percentage of phrases in the machine parse that are in the hand parse). We have developed a methodology for using hand-bracketed...

Ngày tải lên: 20/02/2014, 21:20

... (i.e. the number of successes). We then perform the test with the null hypothesis that the probability of success is chance (= 0.5) and the alternative hypothesis that the probability of suc- cess ... convert the f-structures to triples of the form GF, P i , P j , where P i is the value of the PRED attribute of the f-structure, GF is an LFG gramma...

Ngày tải lên: 08/03/2014, 02:21