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 ... ZnCl2in the dialysis buffer led to the precipitation of each of the three proteins. Neither the intact protein nor the Table 1. Sequence analysis of AMPP C-terminal domain mutants. The percentage of ... that metals were not required for folding of the native enzyme or the AMPP#3-22 fragment. The response of the AMPP#2 fragment to metals differsfrom that of the wild-type protein or the AMPP#3-22fragment....

Báo cáo khoa học: "Using Similarity Scoring To Improve the Bilingual Dictionary for Word Alignment" doc

... 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 wasallowed per word. Furthermore, the ... 4: Performance of dictionaries Dict0.01 for up to one link per wordrebuilding algorithm is independent of the actualword alignment method used.Furthermore, we plan to explore ways to improve the ... probabilities of one word given the other.Aside from the classic statistical approach of Computational Linguistics (ACL), Philadelphia, July 2002, pp. 409-416. Proceedings of the 40th Annual Meeting of...

Báo cáo khoa học: "Using Search-Logs to Improve Query Tagging" potx

... correspondingset of “relevant snippets,” we ﬁrst apply the baselinetagger to the query and all the snippets. We matchany 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 resultsor using only the top result, perform similarly (seeTable 1).1We skip ... annotation to transfer and ﬁnd that using the result that was clicked by the usergives comparable performance to using just the topresult or to aggregating over the top-k results. The most closely...

Báo cáo khoa học: "Using Anaphora Resolution to Improve Opinion Target Identiﬁcation in Movie Reviews" docx

... performed by applying possible paths con-necting them in a dependency graph. These pathsare combined with part -of- speech information and also learned from the annotated corpus. To the best of ... the dependency relationsbetween them. For each opinion target - opinionword pair, the shortest path connecting them isextracted from the dependency graph. A pathconsists of the part -of- speech ... gathered and to be presentedin the context of one particular entity (=movie). The context or topic under which it occurs is there-fore typically clear to the reader and is thereforenot explicitly...

Báo cáo khoa học: "Using Deep Morphology to Improve Automatic Error Detection in Arabic Handwriting Recognition" pot

... by the HR system for a given segment scan. The conf is deﬁned hereas the ratio of the number of hypotheses in the N-best list that the word appears in to the total number of hypotheses. These ... ÂςyrPZD PROB OK PROB PROB PROB PROB PROB PROB PROB OK OK PROB OK PROB PROB PROBDELX INS SUB DOTS SUB ORTH INS SUB SUB ORTH INS SUBTable 1: An example highlighting the different types of Arabic ... gen-erated for the training and test data by comparing the hypotheses to their references.3We decided in thispaper to use a simple binary problem tag: a hypothe-sis word is tagged as "PROB"...

Tài liệu Báo cáo khoa học: "Using Multiple Sources to Construct a Sentiment Sensitive Thesaurus for Cross-Domain Sentiment Classiﬁcation" doc

... 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 asymmetricproperty of the relatedness (Equation 2) implicitlyprefers common ... by Philippa Gregory comesout, I buy it hoping to have the same experience, and lately have been sorely disappointed.These knives are already showing spots of rust de-spite washing by hand and...

Tài liệu Báo cáo khoa học: "Using adaptor grammars to identify synergies in the unsupervised acquisition of linguistic structure" docx

... with a PCFG approximation to the adaptorgrammar. This PCFG contains a production for eachadapted 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 PCFGapproximation.3 Word segmentation with adaptorgrammarsWe now turn to linguistic applications ... be possible to adapt efﬁcient split-merge samplers (Jain and Neal,2007) and Variational Bayes methods (Teh et al.,2008) for DPs to adaptor grammars and other lin-guistic applications of HDPs.AcknowledgmentsThis...

Tài liệu Báo cáo khoa học: "Using linguistic principles to recover empty categories" ppt

... 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 limits of such an approach; ... in the Appendix. if X is a passive VP & X has no complement S if there is a postmodifying dangling PP Y then insert NP* before all postmodifiers of Y else insert NP* before all postmodifiers...

Tài liệu Báo cáo khoa học: "USING BRACKETED PARSES TO EVALUATE A GRAMMAR CHECKING APPLICATION" ppt

... (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 parses to examine both the ... count of the number of phrases in the machine produced parse which cross with one or more phrases in the hand parse), Recall (the percentage of phrases in the hand parse that are also in the...

Báo cáo khoa học: "Using Machine-Learning to Assign Function Labels to Parser Output for Spanish" ppt

... (i.e. the number of successes). We thenperform 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 iis the value of the PRED attribute of the f-structure, GF is an LFG grammatical functionattribute, and P jis the value of ... Constituency Parsing For constituency parsing we use Bikel’s (2002)parser for which we developed a Spanish languagepackage adapted to the Cast3LB data. Prior to parsing, we perform one of the tree...

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