نتایج جستجو برای: pca method

تعداد نتایج: 1647441  

2007
Murat Ekinci Murat Aykut

This paper presents a novel Daubechies-based kernel Principal Component Analysis (PCA) method by integrating the Daubechies wavelet representation of palm images and the kernel PCA method for palmprint recognition. The palmprint is first transformed into the wavelet domain to decompose palm images and the lowest resolution subband coefficients are chosen for palm representation. The kernel PCA ...

Journal: :فیزیک زمین و فضا 0
سعیده همت پور کارشناس ارشد ژئو فیزیک، دانشکده علوم، دانشگاه آزاد اسلامی واحد تهران شمال حسین هاشمی استادیار، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران

optimal attributes are useful in interpretation of seismic data. two proposed methods are presented in this paper for finding optimal attributes. regularized discriminate analysis(rda) is based on 2 parameters ë, ? which called regularization parameter. the other method is principal component analysi s(pca).in this paper gas chimney detection is defined as the subject of study for ranking relev...

2003
James T. Kwok Brian Kan-Wing Mak Simon Ka-Lung Ho

Eigenvoice speaker adaptation has been shown to be effective when only a small amount of adaptation data is available. At the heart of the method is principal component analysis (PCA) employed to find the most important eigenvoices. In this paper, we postulate that nonlinear PCA, in particular kernel PCA, may be even more effective. One major challenge is to map the feature-space eigenvoices ba...

2008
Huimin Zhao Atish P. Sinha Sudha Ram

Classification is a frequently encountered data mining problem. While symbolic classifiers have high comprehensibility, their language bias may hamper their classification performance. Incorporating new features constructed based on the original features may relax such language bias and lead to performance improvement. Among others, principal component analysis (PCA) has been proposed as a poss...

2006
Feng Tang Hai Tao

Efficient and compact representation of images is a fundamental problem in computer vision. Principal Component Analysis (PCA) has been widely used for image representation and has been successfully applied to many computer vision algorithms. In this paper, we propose a method that uses Haar-like binary box functions to span a subspace which approximates the PCA subspace. The proposed method ca...

Journal: :novelty in biomedicine 0
gita eslami department of microbiology, faculty of medicine, shahid beheshti university of medical sciences, tehran, iran. hossein goudarzi department of microbiology, faculty of medicine, shahid beheshti university of medical sciences, tehran, iran. neda baseri department of microbiology, faculty of medicine, shahid beheshti university of medical sciences, tehran, iran. zohreh ghalavand department of microbiology, faculty of medicine, shahid beheshti university of medical sciences, tehran, iran. arezou taherpour department of microbiology, faculty of medicine, kordestan university, kordestan, iran. haniye zhaam cancer research center shahid beheshti university of medical sciences, tehran, iran.

background: prostate cancer (pca) is an important health problem in the aging male population in the world. it is the third most common cancer in the world. despite of its importance, relatively little is known about its etiology. sexually transmitted infections (sti) and urogenital pathogens such as mycoplasma and ureaplasma, have been proposed as a risk factor for prostate cancer development....

1998
Wenyi Zhao Rama Chellappa Arvind Krishnaswamy

In this paper we describe a face recognition method based on PCA (Principal Component Analysis) and LDA (Linear Discriminant Analysis). The method consists of two steps: rst we project the face image from the original vector space to a face subspace via PCA, second we use LDA to obtain a best linear clas-siier. The basic idea of combining PCA and LDA is to improve the generalization capability ...

Journal: :CoRR 2016
Francisco J. Soulignac Pablo Terlisky

A proper circular-arc (PCA) model is a pairM = (C,A) where C is a circle and A is a family of inclusion-free arcs on C in which no two arcs of A cover C. A PCA model U is a (c, `, d, ds)-CA model when C has circumference c, all the arcs in A have length `, all the extremes of the arcs in A are at a distance at least d, and all the beginning points of the arcs in A are at a distance at least d+ ...

2004
Xiuxi Li

For using process operational data to realize process monitoring, kinds of improved Principal Components Analysis (PCA) have been applied to cope with complex industrial processes. In this paper, a novel nonlinear wavelet packet PCA (NLWPPCA) method, which combines input training network with wavelet packet PCA, is proposed. Wavelet packet PCA integrates ability of PCA to de-correlate the varia...

2006
Chen Change Loy Weng-Kin Lai Chee Peng Lim

Protein mass spectrometry (MS) pattern recognition has recently emerged as a new method for cancer diagnosis. Unfortunately, classification performance may degrade owing to the enormously high dimensionality of the data. This paper investigates the use of Random Projection in protein MS data dimensionality reduction. The effectiveness of Random Projection (RP) is analyzed and compared against P...

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