Báo cáo y học: "A Practical Approach to Management of Chronic Hepatitis B"

... stages of chronic hepatitis B infection. Hepatology 2002; 36:1408-1415. 20. Yang LM, Xu KC, Zhao YL, Wu ZR, Chen TF, Qin ZY,et al. Clinical significance of liver biopsy in chronic hepatitis ... Gastroenterol Hepatol 2004; 2:87-106. 4. Fattovich G. Natural history and prognosis of hepatitis B. Semin Liv Dis 2003; 23:47-58. 5. McMahon BJ. The natural history of chronic hepatitis B virus ... sensitive to LAM treatment [16]. 4. Indications of HBV Treatment Historically, levels of HBV DNA and ALT, and histological activity of liver biopsy have been used as the three main factors to determine...

Báo cáo y học: " A Practical Approach to Managing Patients with HCV Infection"

... duration of the liver disease include: prior history of injection drug use, former history of transfusion of blood products, unexplained history of abnormal liver transaminases, or a known history of ... history of HCV infection is important in the management of patients with chronic HCV infection. Unfortunately, the natural history of chronic HCV infection is incompletely defined owing to the ... pathways of chemoprevention of colorectal cancer. Ke-Qin Hu, MD, is the Director of Hepatolgy Services and Associate Professor of Clinical Medicine, Division of Gastroenterology, University of California,...

Tài liệu Báo cáo khoa học: "A Practical Solution to the Problem of Automatic Word Sense Induction" doc

... binary vectors since we assume short contexts where words usually occur only once. By looking at the matrix it is easy to see that contexts c1, c3, and c6 seem to relate to the hand sense of ... this approach is that it allows only as many senses as clusters, thereby limiting the granularity of the meaning space. This problem is avoided by Neill (2002) who uses local instead of global ... different senses of an am-biguous word by clustering its contexts. The main difficulty with this approach, namely the problem of data sparseness, could be mini-mized by looking at only the three...

Tài liệu Báo cáo khoa học: "A Bootstrapping Approach to Named Entity Classification Using Successive Learners" pdf

... seeds seem to be sufficient in covering their sub-types (e.g. the sub-types COUNTRY, CITY, etc for LOCATION). But there are hundreds of sub-types of ORG that cannot be covered by less than ... underlying concept for any proper name type and this concept can be easily expressed by a set of common nouns or pronouns, similar to how concepts are defined by synsets in WordNet (Beckwith ... concept-based seeds to guide the system in learning rules to tag MEDICINE names. This process is fairly intuitive, creating a favorable environment for configuring the NE system to the types of names...

Tài liệu Báo cáo khoa học: "A PRAGMATICBASED APPROACH TO UNDERSTANDING" pdf

... It properly. More recently, Litman and Allen(198q) have extended Allen's model to a hierarchy of task-plans and meta-plans. Litman is currently studying the interpretation of ellipti- ... are necessary in order to identIDi that portion of the underlying plan to which a frasmen- tar7 utterance refers. Focusing mechanAas have been employed by Gross(1977) in identifying the ... interpretation intended by 13 namely, that interpretation most relevant to the current focus of attention in the dialogue. We employ the notion of focus domains in order to group finely grained actions...

Tài liệu Báo cáo khoa học: "A HYBRID APPROACH TO REPRESENTATION IN THE JANUS NATURAL LANGUAGE PROCESSOR" pot

... compounds using a taxonomy has been explored and reported elsewhere [13]. We propose treating many novel cases of metonymy in the following way: 1. Wherepatterns of metonymy can be identified,, ... (FLYING-EVENT y) (ACTOR y x)))) x') }) Though the hybrid gives us the representational capacity to make such definitions, we have chosen as part of our design no_._tt to use it. For to ... for a role relating the nearest ancestor of the class of A to any ancestor of the class of B. The implicit as- sumption is that items structured closely together in the domain model can be...

Tài liệu Báo cáo khoa học: "A PROBABILISTIC APPROACH TO GRAMMATICAL ANALYSIS OF WRITTEN ENGLISH BY COMPUTER" pot

... addition to the one-step probability method to automatically ~nnotate the input text. We have recently devised an interactive version of the word tagging system so that users may type in test ... Error analysis and subsequent modification to the system resulted in over 96 per cent of word tags being correctly assigned automatically. The remaining 3 to ~ per cent were corrected by human ... of the automatic constituent analysis. The detailed distinctions made by the subcategory symbols are devised with the aim of providing helpful information for automatic constituent analysis...

Báo cáo khoa học: A kinetic approach to the dependence of dissimilatory metal reduction by Shewanella oneidensis MR-1 on the outer membrane cytochromes c OmcA and OmcB potx

... reductase (FR), the cytoplas-mic CymA and other, smaller (< 20 kDa), cyto-chromes are highly abundant c-type cytochromes inMR-1R, and thus contribute substantially to the554 nm absorbance. ... insertion mutants of MR-1,and analyzed them in terms of dissimilatory reduction of a variety of metals, i.e. Fe(III), V(V), U(VI), andSe(VI). A ‘whole cell’ kinetics approach was used to determine ... measure of enzymespeciﬁcity To determine whether the lack of phenotype of omcA–omcB–strains observed during anaerobicgrowth on either of the electron acceptors U(VI) andSe(VI) is due to the...

Báo cáo khoa học: "A new Approach to Improving Multilingual Summarization using a Genetic Algorithm" pptx

... denoted by S, a text documentby D, the total number of words in S by N, the to- tal number of sentences in D by n, the sequentialnumber of S in D by i, and the in-document termfrequency of the ... op-eration.3http://www.extractor.com/928Today, graph-based text representations are be-coming increasingly popular, due to their abil-ity to enrich the document model with syntacticand semantic relations. Salton ... 1958)KEY Sum of the keywords frequencies:t∈{Keywords(S)}tf(t)(Edmundson, 1969)COV Ratio of keywords number (Coverage):|Keywords(S)||Keywords(D)|(Liu et al., 2006a)TF Average term frequency...

Báo cáo khoa học: "A Deductive Approach to Dependency Parsing∗" potx

... representation of its underlying seman-tics as a dependency parsing schema shows that thisparsing strategy is in fact conceptually simpler fordependency parsing.3.4 YM03 (Yamada and Matsumoto, 2003)Yamada ... ≥ j.It is easy to verify that the dependency graphg(t) is projective with respect to the linear order of marked terminals wi, according to the usual deﬁ-nition of projectivity found in the ... terms of depen-dency graphs, since they do not do any modiﬁcations to the graph. In order to make the formalism generalenough to include these parsers, we deﬁne items interms of sets of partial...

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