Xem 1-20 trên 648 kết quả Expansive
  • A groundbreaking study of urban sprawl in Calgary, "Expansive Discourses" looks at the city’s development after the Second World War. The interactions of land developers and the local government influenced how the pattern grew: developers met market demands and optimized profits by building houses as efficiently as possible, while the city had to consider wider planning constraints and infrastructure costs.In "Expansive Discourses", Foran examines the complexity of their debates from a historical perspective, why each party acted as it did, and where each can be criticized....

    pdf284p mymi0809 19-01-2013 18 5   Download

  • The purpose of this book is twofold. We realise to-day, as never before, that the fortunes of the world, and of every individual in it, are deeply affected by the problems of world-politics and by the imperial expansion and the imperial rivalries of the greater states of Western civilisation. But when men who have given no special attention to the history of these questions try to form a sound judgment on them, they find themselves handicapped by the lack of any brief and clear resume of the subject. I have tried, in this book, to provide such a summary,...

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  • Distributional similarity is a classic technique for entity set expansion, where the system is given a set of seed entities of a particular class, and is asked to expand the set using a corpus to obtain more entities of the same class as represented by the seeds. This paper shows that a machine learning model called positive and unlabeled learning (PU learning) can model the set expansion problem better. Based on the test results of 10 corpora, we show that a PU learning technique outperformed distributional similarity significantly. ...

    pdf6p hongdo_1 12-04-2013 19 3   Download

  • This paper proposes three modules based on latent topics of documents for alleviating “semantic drift” in bootstrapping entity set expansion. These new modules are added to a discriminative bootstrapping algorithm to realize topic feature generation, negative example selection and entity candidate pruning. In this study, we model latent topics with LDA (Latent Dirichlet Allocation) in an unsupervised way. Experiments show that the accuracy of the extracted entities is improved by 6.7 to 28.2% depending on the domain. ...

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  • User generated content is characterized by short, noisy documents, with many spelling errors and unexpected language usage. To bridge the vocabulary gap between the user’s information need and documents in a specific user generated content environment, the blogosphere, we apply a form of query expansion, i.e., adding and reweighing query terms. Since the blogosphere is noisy, query expansion on the collection itself is rarely effective but external, edited collections are more suitable.

    pdf9p hongphan_1 14-04-2013 20 2   Download

  • Distributional word similarity is most commonly perceived as a symmetric relation. Yet, one of its major applications is lexical expansion, which is generally asymmetric. This paper investigates the nature of directional (asymmetric) similarity measures, which aim to quantify distributional feature inclusion. We identify desired properties of such measures, specify a particular one based on averaged precision, and demonstrate the empirical benefit of directional measures for expansion.

    pdf4p hongphan_1 15-04-2013 23 2   Download

  • Query expansion is an effective technique to improve the performance of information retrieval systems. Although hand-crafted lexical resources, such as WordNet, could provide more reliable related terms, previous studies showed that query expansion using only WordNet leads to very limited performance improvement. One of the main challenges is how to assign appropriate weights to expanded terms.

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  • We present an approach to query expansion in answer retrieval that uses Statistical Machine Translation (SMT) techniques to bridge the lexical gap between questions and answers. SMT-based query expansion is done by i) using a full-sentence paraphraser to introduce synonyms in context of the entire query, and ii) by translating query terms into answer terms using a full-sentence SMT model trained on question-answer pairs.

    pdf8p hongvang_1 16-04-2013 17 1   Download

  • Here we use a model of stochastic birth and death for mapping gene family evolution onto a phylogeny, and show that it can be efficiently applied to multispecies comparisons. The model offers the opportunity for researchers to make stronger inferences regarding the role of natural selection and changing duplication and deletion rates in gene family expansion or contraction. The work is performed as a part of the first author’s MS thesis under the second author’s supervision.

    pdf14p binhminhmuatrenngondoithonggio 09-06-2017 12 1   Download

  • Universal voltage mode biquadratic filter synthesis using nodal admittance matrix expansion. This paper presents a systematic synthesis procedure for generating universal voltage- mode biquadratic filters based on the nodal admittance matrix expansion. The obtained eight equivalent circuits can realize all five standard filter functions namely lowpass, bandpass, highpass, notch and allpass employing only two active elements.

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  • Expansion Joints 25.1 25.2 25.3 25.4 Introduction General Design Criteria Jointless Bridges Small Movement Range Joints Sliding Plate Joints • Compression Seal Joints • Asphaltic Plug Joints • Poured Sealant Joints • Design Example 1 25 25.5 Medium Movement Range Joints Bolt-Down Panel Joints • Strip Seal Joints • Steel Finger Joints • Design Example 2 Ralph J. Dornsife Washington State Department of Transportation 25.6 25.7 Large Movement Range Joints Modular Bridge Expansion Joints • Design Example 3 Construction and Maintenance 25.

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  • Natural Resources and Economic Development explores a key para- dox: why is natural resource exploitation not yielding greater benefits to the poor economies of Africa, Asia and Latin America? Part One examines this paradox both through a historical review of resource use and development and through examining current theories that explain the under-performance of today’s resource-abundant economies, and proposes a frontier expansion hypothesis as an alter- native explanation.

    pdf428p huetay_1 28-02-2013 31 11   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài:Apigenin, a non-mutagenic dietary flavonoid, suppresses lupus by inhibiting autoantigen presentation for expansion of autoreactive Th1 and Th17 cells...

    pdf13p thulanh14 17-10-2011 31 7   Download

  • New material in this edition includes the latest developments in refrigerants and lubricants, together with updated information on compressors, heat exchangers, liquid chillers, electronic expansion valves, controls and cold storage. Topics also covered include efficiency, environmental impact, split systems, retail refrigeration (supermarket systems and cold rooms), industrial systems, fans, air infiltration and noise. This book is divided into 2 parts, part 1 includes the following contents: Fundamentals, the refrigeration cycle, refrigerants, compressors,...

    pdf201p nganga_07 06-10-2015 20 7   Download

  • Let b ≥ 2 be an integer. We prove that the b-ary expansion of every irrational algebraic number cannot have low complexity. Furthermore, we establish that irrational morphic numbers are transcendental, for a wide class of morphisms. In particular, irrational automatic numbers are transcendental. Our main tool is a new, combinatorial transcendence criterion. 1. Introduction Let b ≥ 2 be an integer. The b-ary expansion of every rational number is eventually periodic, but what can be said about the b-ary expansion of an irrational algebraic number? ...

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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 A Cohen Type Inequality for Fourier Expansions of Orthogonal Polynomials with a Nondiscrete Jacobi-Sobolev Inner Product

    pdf22p dauphong14 11-02-2012 25 5   Download

  • 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 Common Fixed Points of Weakly Contractive and Strongly Expansive Mappings in Topological Spaces

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  • We prove that Cayley graphs of SL2 (Fp ) are expanders with respect to the projection of any fixed elements in SL(2, Z) generating a non-elementary subgroup, and with respect to generators chosen at random in SL2 (Fp ). 1. Introduction Expanders are highly-connected sparse graphs widely used in computer science, in areas ranging from parallel computation to complexity theory and cryptography; recently they also have found some remarkable applications in pure mathematics; see [5],[10], [15], [20], [21] and references therein. ...

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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: Exhaustive expansion: A novel technique for analyzing complex data generated by higherorder polychromatic flow cytometry experiments

    pdf15p dauphong4 03-01-2012 25 4   Download

  • 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: Engineered artificial antigen presenting cells facilitate direct and efficient expansion of tumor infiltrating lymphocytes

    pdf13p dauphong6 05-01-2012 29 4   Download


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