Kernel estimators

Xem 1-9 trên 9 kết quả Kernel estimators
  • In this paper we present a supervised Word Sense Disambiguation methodology, that exploits kernel methods to model sense distinctions. In particular a combination of kernel functions is adopted to estimate independently both syntagmatic and domain similarity. We defined a kernel function, namely the Domain Kernel, that allowed us to plug “external knowledge” into the supervised learning process.

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  • We extend previous work on tree kernels to estimate the similarity between the dependency trees of sentences. Using this kernel within a Support Vector Machine, we detect and classify relations between entities in the Automatic Content Extraction (ACE) corpus of news articles. We examine the utility of different features such as Wordnet hypernyms, parts of speech, and entity types, and find that the dependency tree kernel achieves a 20% F1 improvement over a “bag-of-words” kernel.

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  • Mekong Delta rice area's largest with about 3.8 million ha. Of these, winter-spring rice crop was planted 1.5 million hectares, 1.6 million ha of summer-collection, case 3 is 0.5 million ha and 0.25 million ha of winter rice. Rice production in 2008 the entire area is 20.6 million tons in 2009 is estimated at 21 million tons. Supply 90% of the Mekong Delta rice exports contributed greatly to Vietnam in the list of "powers" rice. But this is the loss rate of the highest harvest.

    pdf42p xau_la 10-02-2012 29 5   Download

  • Let Γ be a principal congruence subgroup of SLn (Z) and let σ be an Γ irreducible unitary representation of SO(n). Let Ncus (λ, σ) be the counting function of the eigenvalues of the Casimir operator acting in the space of cusp forms for Γ which transform under SO(n) according to σ. In this paper we Γ prove that the counting function Ncus (λ, σ) satisfies Weyl’s law. Especially, this implies that there exist infinitely many cusp forms for the full modular group SLn (Z). Contents 1. Preliminaries 2. Heat kernel estimates 3. Estimations of the discrete spectrum 4....

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Analytical Plug-In Method for Kernel Density Estimator Applied to Genetic Neutrality Study

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  • As science, ecology is often accused of being weak because of its basic lack of predictive power (Peters 1991) and the many ecological concepts judged vague or tautological (Shrader-Frechette and McCoy 1993). Also, important paradigms that dominated the ecological scene for years have been discarded in favor of new concepts and theories that swamp the most recent ecological literature (e.g., the abandoning of the island biogeography theory in favor of the metapopulations theory; Hanski and Simberloff 1997).

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Diagonal Kernel Point Estimation of nth-Order Discrete Volterra-Wiener Systems

    pdf10p sting12 11-03-2012 7 2   Download

  • Introduction The purpose of this paper is to prove optimal estimates for solutions of the Kohn-Laplacian for certain classes of model domains in several complex variables. This will be achieved by applying a type of singular integral operator whose novel features (related to product theory and flag kernels) differ essentially from the

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  • Dự toán thiết bị đầu cuối trọng cho số ít các nhà khai thác multilinear thể tách rời với hạt nhân Calder'n Zygmund biến trên một số Hardy và Hardy loại Herz không gian o thu được.

    pdf11p phalinh21 01-09-2011 23 3   Download

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