Classifier combination

Xem 1-20 trên 32 kết quả Classifier combination
  • Handwritten text recognition is a difficult problem in the field of pattern recognition. This paper focuses on two aspects of the work on recognizing isolated handwritten Vietnamese characters, including feature extraction and classifier combination. For the first task, based on the work in [1] we will present how to extract features for Vietnamese characters based on gradient, structural, and concavity characteristics of optical character images. For the second task, we first develop a general framework of classifier combination under the context of optical character recognition. ...

    pdf17p tuanlocmuido 19-12-2012 24 2   Download

  • In this paper we examine how the differences in modelling between different data driven systems performing the same NLP task can be exploited to yield a higher accuracy than the best individual system. We do this by means of an experiment involving the task of morpho-syntactic wordclass tagging. Four well-known tagger generators (Hidden Markov Model, Memory-Based, Transformation Rules and Maximum Entropy) are trained on the same corpus data. After comparison, their outputs are combined using several voting strategies and second stage classifiers. ...

    pdf7p bunrieu_1 18-04-2013 26 4   Download

  • This paper proposes to solve the bottleneck of finding training data for word sense disambiguation (WSD) in the domain of web queries, where a complete set of ambiguous word senses are unknown. In this paper, we present a combination of active learning and semi-supervised learning method to treat the case when positive examples, which have an expected word sense in web search result, are only given. The novelty of our approach is to use “pseudo negative examples” with reliable confidence score estimated by a classifier trained with positive and unlabeled examples.

    pdf4p hongphan_1 15-04-2013 29 2   Download

  • This paper describes a fully automatic twostage machine learning architecture that learns temporal relations between pairs of events. The first stage learns the temporal attributes of single event descriptions, such as tense, grammatical aspect, and aspectual class. These imperfect guesses, combined with other linguistic features, are then used in a second stage to classify the temporal relationship between two events. We present both an analysis of our new features and results on the TimeBank Corpus that is 3% higher than previous work that used perfect human tagged features. ...

    pdf4p hongvang_1 16-04-2013 16 2   Download

  • Teach children to learn English is quite hard work and complex by young are not really conscious of learning as adults and most are very giddy. For children focused on lessons, teachers need teaching combined with vivid visuals, invite you to consult the text book "Classifying plants and animals" for further reference in the teaching process English for children.

    pdf14p thieulam5782 04-10-2015 25 7   Download

  • The paper addresses the problem of automatic enrichment of a thesaurus by classifying new words into its classes. The proposed classification method makes use of both the distributional data about a new word and the strength of the semantic relatedness of its target class to other likely candidate classes.

    pdf4p bunthai_1 06-05-2013 21 1   Download

  • In this paper, we propose an approach for identifying curatable articles from a large document set. This system considers three parts of an article (title and abstract, MeSH terms, and captions) as its three individual representations and utilizes two domain-specific resources (UMLS and a tumor name list) to reveal the deep knowledge contained in the article. An SVM classifier is trained and cross-validation is employed to find the best combination of representations. The experimental results show overall high performance. ...

    pdf4p bunthai_1 06-05-2013 12 1   Download

  • We explore the problem of resolving the second person English pronoun you in multi-party dialogue, using a combination of linguistic and visual features. First, we distinguish generic and referential uses, then we classify the referential uses as either plural or singular, and finally, for the latter cases, we identify the addressee. In our first set of experiments, the linguistic and visual features are derived from manual transcriptions and annotations, but in the second set, they are generated through entirely automatic means.

    pdf9p bunthai_1 06-05-2013 17 1   Download

  • Combination of classifiers A combination or an ensemble of classifiers is a set of classifiers are combined to classify new examples. A combination of classifiers is often more accurate than the individual classifiers that make them up. This is Chapter 9: Combination of classifiers.

    ppt22p cocacola_10 08-12-2015 7 1   Download

  • Nhận dạng văn bản viết tay là một vấn đề khó khăn trong lĩnh vực của nhận dạng mẫu.Bài viết này tập trung vào hai khía cạnh của công việc trên công nhận các ký tự viết tay bị cô lập Việt Nam, bao gồm cả khai thác tính năng và sự kết hợp phân loại.

    pdf17p phalinh20 24-08-2011 22 2   Download

  • Many methods are available for computing semantic similarity between individual words, but certain NLP tasks require the comparison of word pairs. This paper presents a kernel-based framework for application to relational reasoning tasks of this kind. The model presented here combines information about two distinct types of word pair similarity: lexical similarity and relational similarity.

    pdf9p bunthai_1 06-05-2013 25 1   Download

  • Before the lesson read through the tapescript. Pre-teach any new words and phrases in class. Some of the opening activities combine vocabulary work and pronunciation. Let students work on their own when classifying vocabulary/ comparing their answers in pairs.

    pdf10p kathy208 14-08-2010 143 94   Download

  • Concrete can be classified as composite material and that is a combination of different components which improve their performance properties. In general case binder component which can be in hard crystalline or amorphous state is considered as the matrix of composite material. In concrete matrix phase the grains of aggregates (dispersed phase) are uniformly distributed.

    pdf179p beobobeo 01-08-2012 48 12   Download

  • MECHANICS IS THE ENGINEERING SCIENCE that deals with studying, defining, and mathematically quantifying “interactions” that take place among “things” in our universe. Our ability to perceive the physical manifestation of such interactions is embedded in the concept of a force, and the “things” that transmit forces among themselves are classified for purposes of analysis as being solid, fluid, or some combination of the two.

    pdf357p chuyenphimbuon 21-07-2012 30 7   Download

  • Design and Implementation of FIR Filters A filter is a system that is designed to alter the spectral content of input signals in a specified manner. Common filtering objectives include improving signal quality, extracting information from signals, or separating signal components that have been previously combined. A digital filter is a mathematical algorithm implemented in hardware, firmware, and/or software that operates on a digital input signal to produce a digital output signal for achieving filtering objectives.

    pdf59p khinhkha 29-07-2010 54 6   Download

  • Vector seed selection was applied to the aforementioned eigenspace images, or multi- spectral images, to obtain initial seeds. The algorithm of seeded region growing was further adopted to divide the multi-spectral images into many small regions. The algorithm of region merging was employed to merge similar regions as well as to combine smaller regions with the nearest neighboring regions.

    pdf402p wawawawawa 27-07-2012 20 4   Download

  • Classifying travel behavior and segmentation becomes increasingly more difficult as modern travelers combine pleasure with business, in order to take time and cost advantage. There are therefore endless variations between the two principle classifications of travel activities, i.e. business and leisure trips. However, leisure trips may include elements, characteristics and motivations of business travel and vice versa. Incentive travelling, extended conference stays and business meetings during leisure travel makes the distinction between the two categories increasingly blurred.

    pdf97p lenh_hoi_xung 21-02-2013 18 3   Download

  • This paper presents the results of handwritten digit recognition on well-known image databases using state-of-the-art feature extraction and classification techniques. The tested databases are obtained from MNIST [1] and collected samples of digits handwritten by teachers at Da Nang University of Technology. For feature extraction, two features are chosen: Hu’s seven moments and image averaging (resizing the images to ones of less number of pixels for easier comparison).

    pdf5p coxetuanloc 09-01-2013 17 2   Download

  • Mutually exclusive rules Classifier contains mutually exclusive rules if the rules are independent of each other Every record is covered by at most one rule Exhaustive rules Classifier has exhaustive coverage if it accounts for every possible combination of attribute values Each record is covered by at least one rule

    ppt90p trinh02 18-01-2013 24 2   Download

  • In text categorization, feature selection (FS) is a strategy that aims at making text classifiers more efficient and accurate. However, when dealing with a new task, it is still difficult to quickly select a suitable one from various FS methods provided by many previous studies. In this paper, we propose a theoretic framework of FS methods based on two basic measurements: frequency measurement and ratio measurement. Then six popular FS methods are in detail discussed under this framework.

    pdf9p hongphan_1 14-04-2013 13 2   Download

CHỦ ĐỀ BẠN MUỐN TÌM

Đồng bộ tài khoản