Xem 1-20 trên 4951 kết quả Large
  • Large herbivores are, and have for a long time been, among the major drivers for forming the shape and function of terrestrial ecosystems. These animals may modify primary production, nutrient cycles, soil properties, fire regimes as well as other biota. Some large herbivore species/populations are at the edge of extinction and great effort is being made to save them. Other species/populations are under discussion for reintroduction. Still other species occur in dense populations and cause conflicts with other land use interests.

    pdf523p phoebe75 01-02-2013 29 5   Download

  • This paper presents a MapReduce algorithm for computing pairwise document similarity in large document collections. MapReduce is an attractive framework because it allows us to decompose the inner products involved in computing document similarity into separate multiplication and summation stages in a way that is well matched to efficient disk access patterns across several machines. On a collection consisting of approximately 900,000 newswire articles, our algorithm exhibits linear growth in running time and space in terms of the number of documents. ...

    pdf4p hongphan_1 15-04-2013 22 4   Download

  • This paper presents an attempt at building a large scale distributed composite language model that simultaneously accounts for local word lexical information, mid-range sentence syntactic structure, and long-span document semantic content under a directed Markov random field paradigm.

    pdf10p hongdo_1 12-04-2013 30 3   Download

  • Cross-document coreference, the task of grouping all the mentions of each entity in a document collection, arises in information extraction and automated knowledge base construction. For large collections, it is clearly impractical to consider all possible groupings of mentions into distinct entities.

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  • Word processors or computers used in Japan employ Japanese input method through keyboard stroke combined with Kana (phonetic) character to Kanji (ideographic, Chinese) character conversion technology. The key factor of Kana-to-Kanji conversion technology is how to raise the accuracy of the conversion through the homophone processing, since we have so many homophonic Kanjis. In this paper, we report the results of our Kana-to-Kanji conversion experiments which embody the homophone processing based on large scale collocation data. ...

    pdf5p bunrieu_1 18-04-2013 19 3   Download

  • Bài giảng "Small Intestine, Large Intestine Superior Mensenteric Artery and Inferior Mensenteric Artery" cung cấp cho sinh viên các kiến thức giúp sinh viên hiểu được phân đoạn của ruột non và ruột già; mô tả được đặc điểm cấu tạo của ruột non, ruột già; trình bày nguyên ủy, nhánh bên của ĐM MTTT và ĐM MTTD. Mời các bạn cùng tham khảo.

    pdf19p nhasinhaoanh_09 15-10-2015 15 5   Download

  • Study of the effect of Nd substitution for La on magnetocaloric effect (MCE) of polycrystalline perovskites (La1-xNdx)0.7Sr0.3MnO3 (x = 0.0, 0.2 , 0.4, 0.6, 0.8, 1.0 ) is presented. Large MCE is observed in all samples. The presence of Nd affects to both maximum magnetic entropy change, |∆Sm|max, and Curie temperature, TC. |∆Sm|max slightly reduces with low content and increases with high content of Nd and gets maximum value of 4.83 J/kg.K for x = 0.8. TC of the samples determined from the

    pdf6p tuanlocmuido 19-12-2012 19 2   Download

  • We present CS NIPER (Corpus Sniper), a tool that implements (i) a web-based multiuser scenario for identifying and annotating non-canonical grammatical constructions in large corpora based on linguistic queries and (ii) evaluation of annotation quality by measuring inter-rater agreement.

    pdf6p nghetay_1 07-04-2013 15 2   Download

  • We present a simple semi-supervised relation extraction system with large-scale word clustering. We focus on systematically exploring the effectiveness of different cluster-based features. We also propose several statistical methods for selecting clusters at an appropriate level of granularity. When training on different sizes of data, our semi-supervised approach consistently outperformed a state-of-the-art supervised baseline system.

    pdf9p hongdo_1 12-04-2013 17 2   Download

  • This paper describes the first system for large-scale acquisition of subcategorization frames (SCFs) from English corpus data which can be used to acquire comprehensive lexicons for verbs, nouns and adjectives. The system incorporates an extensive rulebased classifier which identifies 168 verbal, 37 adjectival and 31 nominal frames from grammatical relations (GRs) output by a robust parser. The system achieves state-ofthe-art performance on all three sets.

    pdf8p hongvang_1 16-04-2013 19 2   Download

  • We describe an original method that automatically finds specific topics in a large collection of texts. Each topic is first identified as a specific cluster of texts and then represented as a virtual concept, which is a weighted mixture of words. Our intention is to employ these virtual concepts in document indexing. In this paper we show some preliminary experimental results and discuss directions of future work.

    pdf6p bunbo_1 17-04-2013 33 2   Download

  • This paper describes a spoken dialog QA system as a substitution for call centers. The system is capable of making dialogs for both fixing speech recognition errors and for clarifying vague questions, based on only large text knowledge base. We introduce two measures to make dialogs for fixing recognition errors. An experimental evaluation shows the advantages of these measures.

    pdf4p bunbo_1 17-04-2013 15 2   Download

  • A lexicon is an essential component in a generation system but few efforts have been made to build a rich, large-scale lexicon and make it reusable for different generation applications. In this paper, we describe our work to build such a lexicon by combining multiple, heterogeneous linguistic resources which have been developed for other purposes. Novel transformation and integration of resources is required to reuse them for generation.

    pdf7p bunrieu_1 18-04-2013 16 2   Download

  • Knowledge acquisition is a serious bottleneck for natural language understanding systems. For this reason, large-scale linguistic resources have been compiled and made available by organizations such as the Linguistic Data Consortium (Comlex) and Princeton University (WordNet). Systems making use of these resources can greatly accelerate the development process by avoiding the need for the developer to re-create this information. In this paper we describe how we integrated these large scale linguistic resources into our natural language understanding system. ...

    pdf5p bunrieu_1 18-04-2013 18 2   Download

  • Hearst states that she tried to apply this strategy to the part-of relation, but failed. We comment later on We present a method for extracting parts of objects the differences in our approach that we believe were from wholes (e.g. "speedometer" from "car"). Given most important to our comparative success. a very large corpus our method finds part words with Looking more widely still, there is an ever55% accuracy for the top 50 words as ranked by the growing literature on the use of statistical/corpussystem. ...

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  • This unique book offers a vendor-neutral approach for designing large local area networks according to business or organizational needs, rather than from a product perspective. Author and independent network design consultant Kevin Dooley outlines "top-down network design" for building a technological infrastructure to fit your organization's requirements, a process far more effective and cost-efficient than fitting the organization to the parameters of a shrink-wrapped proprietary solution.

    pdf256p ringphone 02-05-2013 24 2   Download

  • The aim of this paper is to show how large-scale (computational) grammars of natural language benefit from an organization of semantics which is based on Minimal Recursion Semantics (MRS; Copestake et al. (1999)). This we are doing by providing an account of valence alternations in German based on MRS, showing how such an account makes a computational grammar more efficient and less complicated for the grammar writer.

    pdf4p bunthai_1 06-05-2013 20 2   Download

  • In this paper, we present a supervised learning approach to training submodular scoring functions for extractive multidocument summarization. By taking a structured prediction approach, we provide a large-margin method that directly optimizes a convex relaxation of the desired performance measure.

    pdf10p bunthai_1 06-05-2013 18 2   Download

  • We present U BY, a large-scale lexicalsemantic resource combining a wide range of information from expert-constructed and collaboratively constructed resources for English and German. It currently contains nine resources in two languages: English WordNet, Wiktionary, Wikipedia, FrameNet and VerbNet, German Wikipedia, Wiktionary and GermaNet, and multilingual OmegaWiki modeled according to the LMF standard. For FrameNet, VerbNet and all collaboratively constructed resources, this is done for the first time.

    pdf11p bunthai_1 06-05-2013 15 2   Download

  • In August 2001, the Directorate of Acquisition Resources and Analysis in the Office of the Secretary of Defense (OSD) asked the RAND Corporation to identify policy issues relevant to large service acquisitions that deserved closer attention in OSD. RAND agreed to examine a variety of new large acquisitions o

    pdf0p xuan2013 29-01-2013 18 1   Download


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