Results 141 to 150 of about 5,333 (191)

Enhancing 5G uplink communications through efficient PCC-OFDM with neural network-based channel estimation. [PDF]

Sci Rep
J MJ, S S.
europepmc   +1 more source

Comparison of some isoparametric mappings for curved triangular spectral elements

Journal of Computational Physics, 2016
International audienceUsing the spectral element method (SEM), or more generally hp-finite elements, it is possible to solve with high accuracy various kinds of problems governed by partial differential equations (PDEs).
Richard Pasquetti
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Error Analysis for Mapped Jacobi Spectral Methods

Journal of Scientific Computing, 2005
Approximation properties of mapped Jacobi polynomials and of interpolations based on Jacobi-Gauss-Lobatto points are established. These results are important for the numerical analysis of mapped Jacobi spectral methods. As examples of applications, optimal error estimates for several popular regular and singular mappings are derived.
Li-lian Wang, Jie Shen 0001
openaire   +2 more sources

Numerical Mapping of Arbitrary Domains Using Spectral Methods

Journal of Computational Physics, 1993
The purpose of this paper is to describe a method of solving quasilinear elliptic grid generation equations by spectral techniques. Mathematical analysis and numerical experiments are presented.
Koomullil, G. P., Warsi, Z. U. A.
openaire   +1 more source

A Spectral Decomposition Method to Approximate Dirichlet-to-Neumann Maps in Complicated Waveguides

SIAM Journal on Numerical Analysis, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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A Hybrid GMM and Codebook Mapping Method for Spectral Conversion

2005
This paper proposes a new mapping method combining GMM and codebook mapping methods to transform spectral envelope for voice conversion system. After analyzing overly smoothing problem of GMM mapping method in detail, we propose to convert the basic spectral envelope by GMM method and convert envelope-subtracted spectral details by GMM and phone-tied ...
Yongguo Kang, Zhiwei Shuang, Jianhua Tao 0001, Wei Zhang 0031, Bo Xu 0002   +4 more
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Spectral methods and mappings for evolution equations on the infinite line

Computer Methods in Applied Mechanics and Engineering, 1990
This paper deals with Fourier spectral methods and mappings for evolution equations on the infinite line. The approach of the paper avoids the steepest descent analysis. The effect of the mappings on the stability of time-integration methods is investigated, and the optimal mapping parameters for sensitivity to changes in the solution are examined.
Weideman, J. A. C., Cloot, A.
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Polarization Mapping:  A Method To Improve Sum Frequency Generation Spectral Analysis

Analytical Chemistry, 2004
A "polarization mapping" method has been applied to improve the fitting quality of sum frequency generation (SFG) vibrational spectra of complicated systems and validate the data analysis of simple SFG spectra. Using such a method, two-dimensional SFG spectra can be constructed, from which more reliable spectral information can be obtained from a ...
Jie, Wang, Matthew L, Clarke, Zhan, Chen
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A spectral matching quality indicator for material mapping using spectral library search methods

International Journal of Remote Sensing, 2011
Spectral library search methods are being used increasingly as an efficient approach for exploiting hyperspectral remotely sensed data in material identification and mapping applications. The aim of this study was to develop a quantitative method, using an indicator called the Quality factor Q-factor, for providing quantitative information on the ...
Rama Rao Nidamanuri, Bernd Zbell
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An object segmentation method based on saliency map and spectral clustering

2015 World Congress on Information Technology and Computer Applications (WCITCA), 2015
Image segmentation is an important research topic in the field of computer vision. Spectral Clustering (SC) algorithm is one of the most popular used clustering methods for image segmentation. However, the cluster number must be estimated by expertise users to be determined. This limits its application in image segmentation.
Samira Chebbout, Hayet Farida Merouani
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