Báo cáo khoa học: "A Re-examination of Query Expansion Using Lexical Resources" pptx

... brieﬂy re-view the studies of query expansion using axiomaticapproaches in Section 3. We then present our study of using lexical resources, such as WordNet, for query expansion in Section 4, and ... the problem of query expansion using lexical resources with therecently proposed axiomatic approaches (Fang andZhai, 2006). The major advantage of axiomatic ap-proaches in query expansion is ... problem of query expansion using lexical resources in recently pro-posed axiomatic framework and ﬁnd that we areable to signiﬁcantly improve retrieval performancethrough query expansion using...

Báo cáo khoa học: "A MODEL OF REVISION IN NATURAL LANGUAGE GENERATION" pptx

... follows is an example of the incremental revision of a summary paragraph. The discussion at each step gives an indication of the character of information needed and the types of decisions made ... guard against the possibility of a choice causing unforeseen problems in later steps of the revision process. One way to avoid this problem is to keep a version of the text for each change made ... model of generation with revision, focusing on improving textual coherence. First we estabLish a division of labor within the generation/revision process. Then we look at the phases of revision...

Báo cáo khoa học: "A Combination of Active Learning and Semi-supervised Learning Starting with Positive and Unlabeled Examples for Word Sense Disambiguation: An Empirical Study on Japanese Web Search Query" pdf

... text search query and the number of initial positive examples and the per-centage of it in the training data set. word No. of sensesNo. of instancesNo. of features Percentage of positive ... the num-ber of its senses, the number of its data instances, the number of feature, and the percentage of positive sense instances for each data set. Assigning the correct labels of data instances ... heterogeneous do-mains, we often find a large number of unex-pected senses. For example, all the authors did not know the music club meaning of Loft. As the result, we often had to spend much...

Tài liệu Báo cáo khoa học: A role of miR-27 in the regulation of adipogenesis ppt

... thatexpression of miR-27 resulted in blockade of expression of PPARc andC ⁄ EBPa, the two master regulators of adipogenesis. Importantly, expression of miR-27 was increased in fat tissue of obese ... role of miR-27 in the regulation of adipogenesisQun Lin1, Zhanguo Gao2, Rodolfo M. Alarcon1, Jianping Ye2and Zhong Yun11 Department of Therapeutic Radiology, Yale University School of ... regulation of miR-27 expression. Ourdata suggest that the miR-27 gene family is potentiallyan important class of negative regulators of adipogene-sis and may play a role in the regulation of adiposefunctions...

Tài liệu Báo cáo khoa học: "A study of Information Retrieval weighting schemes for sentiment analysis" doc

... variety of di-verse sources. They introduced features based onOsgood’s Theory of Semantic Differentiation (Os-good, 1967) using WordNet to derive the values of potency, activity and evaluative of ... number of times term i occurs inD, idfiis the inverse document frequency of termi, N is the total number of documents and dfiisthe number of documents that contain term i.The utilization of ... as a bag -of- words feature vector: D =w1, w2, , w|V |where |V | is the size of the vocabulary (i.e. thenumber of unique words) and wi, i = 1, . . . , |V |is the weight of term i...

Tài liệu Báo cáo khoa học: "The Impact of Query Reﬁnement in the Web People Search Task" docx

... it is the goal of this pa-per. We want to evaluate the actual impact of us-ing query reﬁnements in the Web People Search(WePS) clustering task (as deﬁned in the frame-work of the WePS evaluation). ... Conference). Each dataset consists of, at most, 100 web pages written in English andretrieved as the top search results of a web searchengine, using the (quoted) person name as query 2.Annotators were ... personattributes (afﬁliation, occupation, variations of name, date of birth, etc.) for each individual shar-ing the name searched. These attributes emulatethe kind of query reﬁnements that a user might tryin...

Tài liệu Báo cáo khoa học: "A Comparison of Alternative Parse Tree Paths for Labeling Semantic Roles" ppt

... harmonic mean of precision and recall. Our calculation of recall scores represents the best-possible performance of systems using only these types of parse-tree paths. This level of per-formance ... em-ploying each of these parsing alternatives? Each of these four questions is addressed in the four subsequent sections of this paper, fol-lowed by a discussion of the implications of our findings ... appropropriate constituents in a parse tree of a sentence. Each of these efforts employed the use of parse tree paths as predictive features, encoding the series of up and down transitions through...

Tài liệu Báo cáo khoa học: "A SNAPSHOT OF KDS A KNOWLEDGE" pot

... gcel-pursuin~ planner, end the use of dynamic models of speaker and hearer to shape the text to the task at hand. STATEMENT OF THE PROBLEM The task of KDS is to generate English text ... vlz: ordering among sentences and the scope of each, quality comparisons between alternative 8~regations of sub-sententJal units, the coordination of communication with non-linguistic activities ... text from a computer representation of knowledge to be delivered. We have addressed a number of Issues not previously encountered In the generation of Natural Language st the multi-sentence...

Tài liệu Báo cáo khoa học: "A GENERALIZATION OF THE OFFLINE PARSABLE GRAMMARS" doc

... f'mite set of symbols, so there is only a finite number of strings of given length L, and it has a finite number of rules, so there is only a finite number of possible parse trees of given depth ... Let C a be the set of pairs [A,B] such that A B by a tree of depth n. Clearly C t is the set of pairs [A,B] such that (A ) B) is a rule of G. Also, Cn+ 1 is the set of pairs [A,C] such that ... representation for the set of pairs of ground terms [A,B] such that (A > B) is a rule in the ground grammar of G'. Clearly this representation is just the set of pairs of terms [C,D] such...

Báo cáo khoa học: "Unsupervised Learning of Arabic Stemming using a Parallel Corpus" pot

... a set of Arabic documents and an Arabic query, ﬁnd a list of documents relevant to the query, and rank them by probability of relevance.We used the TREC 2002 documents (severalyears of AFP ... entireparadigm of a lexical item. The main purpose of stemming as seen in this paper is to conﬂate the to-ken space used in statistical methods in order to im-prove their effectiveness. The quality of ... phase was adaptedto use the sum of the weights of a word in a sentenceinstead of the count.2.3 Candidate Stem ScoringAs previously mentioned, each word has a list of substrings that are possible...

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