Xem 1-20 trên 922 kết quả Accuracy
  • The development of robust accuracy assessment methods for the validation of spatial data represents a difficult challenge for the geospatial science community. The importance and timeliness of this issue are related directly to the dramatic escalation in the development and application of spatial data throughout the latter 20th century. This trend, which is expected to continue, will become increasingly pervasive and continue to revolutionize future decision-making processes.

    pdf292p 951628473 07-05-2012 70 17   Download

  • In this paper we demonstrate that there is a strong correlation between the Question Answering (QA) accuracy and the log-likelihood of the answer typing component of our statistical QA model. We exploit this observation in a clustering algorithm which optimizes QA accuracy by maximizing the log-likelihood of a set of question-and-answer pairs.

    pdf5p hongdo_1 12-04-2013 14 2   Download

  • While OOV is always a problem for most languages in ASR, in the Chinese case the problem can be avoided by utilizing character n-grams and moderate performances can be obtained. However, character ngram has its own limitation and proper addition of new words can increase the ASR performance. Here we propose a discriminative lexicon adaptation approach for improved character accuracy, which not only adds new words but also deletes some words from the current lexicon.

    pdf9p hongphan_1 14-04-2013 19 2   Download

  • We evaluate the accuracy of an unlexicalized statistical parser, trained on 4K treebanked sentences from balanced data and tested on the PARC DepBank. We demonstrate that a parser which is competitive in accuracy (without sacrificing processing speed) can be quickly tuned without reliance on large in-domain manuallyconstructed treebanks. This makes it more practical to use statistical parsers in applications that need access to aspects of predicate-argument structure.

    pdf8p hongvang_1 16-04-2013 15 2   Download

  • This paper presents a method of improving the accuracy of subcategorization frames (SCFs) acquired from corpora to augment existing lexicon resources. I estimate a confidence value of each SCF using corpus-based statistics, and then perform clustering of SCF confidencevalue vectors for words to capture cooccurrence tendency among SCFs in the lexicon.

    pdf6p bunbo_1 17-04-2013 21 2   Download

  • We compare the CCG parser of Clark and Curran (2007) with a state-of-the-art Penn Treebank (PTB) parser. An accuracy comparison is performed by converting the CCG derivations into PTB trees. We show that the conversion is extremely difficult to perform, but are able to fairly compare the parsers on a representative subset of the PTB test section, obtaining results for the CCG parser that are statistically no different to those for the Berkeley parser.

    pdf4p hongphan_1 15-04-2013 17 1   Download

  • Modeling of individual users is a promising way of improving the performance of spoken dialogue systems deployed for the general public and utilized repeatedly. We define “implicitly-supervised” ASR accuracy per user on the basis of responses following the system’s explicit confirmations. We combine the estimated ASR accuracy with the user’s barge-in rate, which represents how well the user is accustomed to using the system, to predict interpretation errors in barge-in utterances. Experimental results showed that the estimated ASR accuracy improved prediction performance.

    pdf4p hongphan_1 15-04-2013 20 1   Download

  • This paper demonstrates a conceptually simple but effective method of increasing the accuracy of QA systems on factoid-style questions. We define the notion of an inverted question, and show that by requiring that the answers to the original and inverted questions be mutually consistent, incorrect answers get demoted in confidence and correct ones promoted. Additionally, we show that lack of validation can be used to assert no-answer (nil) conditions.

    pdf8p hongvang_1 16-04-2013 10 1   Download

  • We aim at finding the minimal set of fragments which achieves maximal parse accuracy in Data Oriented Parsing. Experiments with the Penn Wall Street Journal treebank show that counts of almost arbitrary fragments within parse trees are important, leading to improved parse accuracy over previous models tested on this treebank (a precis ion of 90.8% and a recall of 90.6%). We isolate some dependency relations which previous models neglect but which contribute to higher parse accuracy.

    pdf8p bunrieu_1 18-04-2013 12 1   Download

  • Stewart's CALCULUS, Fifth Edition has the mathematical precision, accuracy, clarity of exposition and outstanding examples and problem sets that have characterized the first four editions. Stewart retains the focus on problem solving and the pedagogical system that has made the book a favorite of students and instructors in a wide variety of colleges and universities throughout the world.

    pdf1300p greengrass304 14-09-2012 66 31   Download

  • This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

    pdf427p kennybibo 14-07-2012 43 12   Download

  • The state of the art of the machine industry has experienced a rapidly accelerating evolution since the outset of the first industrial revolution. Modern machines are required to perform to varying requirements of accuracy, productivity, and surface finish requirements. It is the purpose of this discussion to establish some guidelines of machine system design to attain the desired performance requirements of accuracy, surface finish, etc. Modern industrial machines are considered as a total system comprised of the control, drive, and machine....

    pdf16p thanhspktcdt10 23-03-2013 25 8   Download

  • Accuracy of depolarization and delay spread predictions using advanced ray-based modeling in indoor scenarios

    pdf9p sting04 08-02-2012 24 7   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: Systematic Errors and Location Accuracy in Wireless Networks

    pdf9p dauphong20 10-03-2012 18 6   Download

  • Digital Elevation Model (DEM) is an important component of GIS applications in many socio-economic areas. Especially, DEM has a very important role in monitoring and managing natural resources, preventing natural hazards, and supporting spatial decision making. Usually, DEM is built by interpolation from a limited set of sample points. Thus, the accuracy of the DEM is depended on the used interpolation method.

    pdf8p dem_thanh 22-12-2012 19 5   Download

  • Instant Messaging that Adds More Value and Accuracy to Your Business You can replay the voice messages recorded by the Telephone Answering Machine (TAM) function*, or have recorded messages automatically transferred by phone or e-mail to a designated party. You can receive messages at your PC or cellular phone, and you can create your own greeting message (WAV file).

    pdf2p thaudiennhe 21-11-2010 46 4   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: Effect of dsDNA binding to SmD-derived peptides on clinical accuracy in the diagnosis of systemic lupus erythematosus...

    pdf11p thulanh13 15-10-2011 19 4   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Comparison of the diagnostic accuracy of commercial NS1-based diagnostic tests for early dengue infection

    pdf10p dauphong1 21-12-2011 16 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: Influence of the training set on the accuracy of surface EMG classification in dynamic contractions for the control of multifunction prostheses

    pdf9p panasonic08 05-01-2012 18 4   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Low complexity and high accuracy angle of arrival estimation using eigenvalue decomposition with extension to 2D AOA and power estimation

    pdf13p dauphong11 06-02-2012 21 4   Download

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