نتایج جستجو برای: fuzzy maximum likelihood classifier

تعداد نتایج: 484012  

2003
Ciprian Chelba Alex Acero

We present a method for conditional maximum likelihood estimation of N-gram models used for text or speech utterance classification. The method employs a well known technique relying on a generalization of the Baum-Eagon inequality from polynomials to rational functions. The best performance is achieved for the 1-gram classifier where conditional maximum likelihood training reduces the class er...

Journal: :journal of mining and environment 2013
saeed mojeddifar hojatollah ranjbar hossain nezamabadipour

the main problem associated with the traditional approach to image classification for the mapping of hydrothermal alteration is that materials not associated with hydrothermal alteration may be erroneously classified as hydrothermally altered due to the similar spectral properties of altered and unaltered minerals. the major objective of this paper is to investigate the potential of a neuro-fuz...

Journal: Desert 2012
Gh.R. Zehtabian H.R. Matinfar M. Shirazi S.K. Alavipanah

Soil Salinity has been a large problem in arid and semi arid regions. Preparation of such maps is useful for Natural resource managers. Old methods of preparing such maps require a lot of time and cost. Multi-spectral remotely sensed dates due to the broad vision and repeating of these imageries is suitable for provide saline soil maps. This investigation is conducted to provide saline soil map...

ژورنال: علوم آب و خاک 2011
علیرضا سفیانیان , , ملیحه السادات مدنیان, ,

Land cover maps derived from satellite images play a key role in regional and national land cover assessments. In order to compare maximum likelihood and minimum distance to mean classifiers, LISS-III images from IRS-P6 satellite were acquired in August 2008 from the western part of Isfahan. First, the LISS-III image was georeferenced. The Root Mean Square error of less than one pixel was the r...

Journal: :Remote Sensing 2016
Yetao Yang Yi Wang Ke Wu Xin Yu

Urban fringe is the transition zone fine grained with urban and non-urban land cover types. The complex landscape mosaic in this area challenges the land cover classification based on the remote-sensing data. Spectral signatures are not efficient to discriminate all pixels into classes. To improve the recognition and handle the uncertainty, this paper provides a novel integrated approach, based...

2010
Lavika Goel

-The findings of recent studies are showing strong evidence to the fact that some aspects of biogeography can be applied to solve specific problems in science and engineering. The proposed work presents a hybrid biologically inspired technique that can be adapted according to the database of expert knowledge for a more focused satellite image classification. The paper also presents a comparativ...

Journal: :Fuzzy Sets and Systems 2010
Hsu-Kun Wu Jer-Guang Hsieh Yih-Lon Lin Jyh-Horng Jeng

In this paper, M-estimators, where M stands for maximum likelihood, used in robust regression theory for linear parametric regression problems will be generalized to nonparametric maximum likelihood fuzzy neural networks (MFNNs) for nonlinear regression problems. Emphasis is put particularly on the robustness against outliers. This provides alternative learning machines when faced with general ...

Journal: :desert 0
m. shirazi m.sc graduate, university of tehran, karaj, iran gh.r. zehtabian professor, university of tehran, karaj, iran h.r. matinfar assistant professor, university of lorestan, khoram abad, iran s.k. alavipanah professor, university of tehran, tehran, iran

soil salinity has been a large problem in arid and semi arid regions. preparation of such maps is useful for natural resource managers. old methods of preparing such maps require a lot of time and cost. multi-spectral remotely sensed dates due to the broad vision and repeating of these imageries is suitable for provide saline soil maps. this investigation is conducted to provide saline soil map...

2017
Guang Wen Alain Protat Hui Xiao

A prototype-based method is developed to discriminate different types of clutter (ground clutter, sea clutter, and insects) from weather echoes using polarimetric measurements and their textures. This method employs a clustering algorithm to generate data groups from the training dataset, each of which is modeled as a weighted Gaussian distribution called a “prototype.” Two classification algor...

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