نتایج جستجو برای: feature weighting

تعداد نتایج: 252039  

Journal: :Algorithms 2015
Yuan Zhou Hong-fu Zuo Jiao Feng

Aiming at improving the well-known fuzzy compactness and separation algorithm (FCS), this paper proposes a new clustering algorithm based on feature weighting fuzzy compactness and separation (WFCS). In view of the contribution of features to clustering, the proposed algorithm introduces the feature weighting into the objective function. We first formulate the membership and feature weighting, ...

Journal: :International Journal of Computational Intelligence and Applications 2011
Ali Selamat Zhi-Sam Lee Mohd Aizaini Maarof Siti Mariyam Hj. Shamsuddin

In this paper, an improved web page classification method (IWPCM) using neural networks to identify the illicit contents of web pages is proposed. The proposed IWPCM approach is based on the improvement of feature selection of the web pages using class based feature vectors (CPBF). The CPBF feature selection approach has been calculated by considering the important term's weight for illicit web...

1997
Nicholas Howe Claire Cardie

Previous work on feature weighting for case-based learning algorithms has tended to use either global weights or weights that vary over extremely local regions of the case space. This paper examines the use of coarsely local weighting schemes, where feature weights are allowed to vary but are identical for groups or clusters of cases. We present a new technique, called class distribution weight...

Journal: :journal of computer and robotics 0
babak nasersharif school of computer engineering, faculty of engineering, university of guilan, rasht, iran audio and speech processing lab, department of computer engineering, iran university of science and technology, tehran, iran ahamd akbari audio and speech processing lab, department of computer engineering, iran university of science and technology, tehran, iran

in recent years, sub-band speech recognition has been found useful in addressing the need for robustness in speech recognition, especially for the speech contaminated by band-limited noise. in sub-band speech recognition, the full band speech is divided into several frequency sub-bands, with the result of the recognition task given by the combination of the sub-band feature vectors or their lik...

2010
Chong Long Lei Shi

This paper describes our approach to the Person Name Disambiguation clustering task in the Third Web People Search Evaluation Campaign(WePS3). The method focuses on two aspects: the extended feature sets, and feature relevance weighting. Bag-of-words and named entities are most commonly used features in many existing web entity disambiguation algorithms and we further extend this basic feature ...

Journal: :JCP 2012
Wei Yang Kuanquan Wang Wangmeng Zuo

Feature selection is of considerable importance in data mining and machine learning, especially for high dimensional data. In this paper, we propose a novel nearest neighbor-based feature weighting algorithm, which learns a feature weighting vector by maximizing the expected leave-one-out classification accuracy with a regularization term. The algorithm makes no parametric assumptions about the...

1999
Wlodzislaw Duch Karol Grudzinski

The class of similarity based methods (SBM) covers most neural models and many other classifiers. Performance of such methods is significantly improved if irrelevant features are removed and feature weights introduced, scaling their influence on calculation of similarity. Several methods for feature selection and weighting are described. As an alternative to the global minimization procedures c...

Journal: :CoRR 2015
Gabriel Prat-Masramon Lluís A. Belanche Muñoz

Feature weighting algorithms try to solve a problem of great importance nowadays in machine learning: The search of a relevance measure for the features of a given domain. This relevance is primarily used for feature selection as feature weighting can be seen as a generalization of it, but it is also useful to better understand a problem’s domain or to guide an inductor in its learning process....

2013
J. Alamelu Mangai Satej Wagle V. Santhosh Kumar

The exponential increase in the volume of medical image database has imposed new challenges to clinical routine in maintaining patient history, diagnosis, treatment and monitoring. With the advent of data mining and machine learning techniques it is possible to automate and/or assist physicians in clinical diagnosis. In this research a medical image classification framework using data mining te...

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