Results 61 to 70 of about 1,096,865 (195)

Optimized and Aligned Anisotropic Monte Carlo Sampling Patterns

Computer Graphics Forum, EarlyView.
Abstract Path tracing uses Monte Carlo integration to solve the rendering equation by evaluating the integrand at random sampling points. The convergence rate of the error can be significantly improved by using correlated instead of random sampling, especially on smooth integrands.
Mirco Werner, Johannes Hanika, Carsten Dachsbacher   +2 more
wiley   +1 more source

Combining Voiceprint Feature Extraction With Deep Learning Based Classifiers for Early Chronic Obstructive Pulmonary Disease Screening

Vector: The Journal of Engineering, Volume 2027, Issue 1, January/December 2027.
Graphic Abstract (GA) presents an overview of the CNN‐based classification process, which consists of several convolutional layers, several pooling layers, and a classification layer. Multilayer CNNs are capable of automatic feature enhancement, denoising, feature extraction, and pattern recognition tasks, and they have been applied in automatic ...
Pi‐Yun Chen, Can‐Xiang Wang, Neng‐Sheng Pai, Yu‐En Cheng, Chun‐Yu Lin, Chien‐Ming Li, Chia‐Hung Lin   +6 more
wiley   +1 more source

\(q\)-Weierstrass transform associated with the \(q\)-Fourier Bessel operator

Le Matematiche, 2016
Summary: This work deals with the reproducing kernels in Hilbert spaces. Namely, we study the Weierstrass transform in quantum calculus related to the Fourier Bessel transform and we give the appropriate best approximations of the inversion.
Soumaya Chefai, Kamel Brahim
openaire   +1 more source

A Note on the Generalized Relativistic Diffusion Equation

Mathematics, 2019
We study here a generalization of the time-fractional relativistic diffusion equation based on the application of Caputo fractional derivatives of a function with respect to another function.
Luisa Beghin, Roberto Garra
doaj   +1 more source

Frequency‐dependent contraction rates for the Bayesian method to the inverse source problem

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract This paper addresses an inverse source problem for acoustic waves in a range of frequencies. Our study has two main goals. First, although the problem is severely ill‐posed with a logarithmic stability estimate, we demonstrate, through careful analysis of the forward map's singular values, that increasing the frequency range enhances stability,
Pu‐Zhao Kow, Jenn‐Nan Wang
wiley   +1 more source

Quantitative Uncertainty Principles for the Canonical Fourier Bessel Transform

Kragujevac Journal of Mathematics
The aim of this paper is to prove new uncertainty principles for the Canonical Fourier Bessel transform. To do so we prove a quantitative uncertainty inequality about the essential supports of a nonzero function for this transformation.
Hleili, Khaled, Hleili, Manel
openaire   +2 more sources

Design of diffractive optical elements to suppress the Bessel-Gauss beam generated by reflective off-axis axicon

Results in Physics
A phase updating algorithm is proposed to design a diffractive optical element (DOE) to suppress the side-lobes of the Bessel-Gauss beam generated by the reflective off-axis axicon.
Qifeng Yan, Shuai Zhao, XiangJi Guo, Tao Chen, Ming Ming   +4 more
doaj   +1 more source

Full‐Space Terahertz Airy Beam Shaping via Composite Bilayer Metasurface With Switchable Amplitude–Phase Encoding Channels

Nanophotonics, Volume 15, Issue 21, 12 November 2026.
A composite bilayer metasurface integrates linear‐polarization amplitude–phase modulation with circular‐polarization Pancharatnam–Berry phase modulation, enabling multidimensional terahertz Airy beam manipulation within a single compact aperture. The highly integrated platform supports diverse Airy beam generation and offers new opportunities for ...
Yunting Bai, Shaohe Li, Yan Wang, Qike Shi, Fan Nie, Xin Jue, Yujie Liu, Hailin Wang, Runfeng Su, Jian Chen   +9 more
wiley   +1 more source

3dcon: tomogram denoising by deconvolution

Acta Crystallographica Section D, Volume 82, Issue 11, Page 1240-1250, November 2026.
An open‐source entropy‐regularized deconvolution workflow is presented for denoising tomographic reconstructions from cryo‐electron microscopy.Cryo‐electron tomography is an expanding technology for the study of macromolecules, viruses and cells.
Peter Kirchweger, Lev Melnikovsky, Shahar Seifer, Michael Elbaum   +3 more
wiley   +1 more source

New algorithms for approximating oscillatory Bessel integrals with Cauchy-type singularities

Results in Applied Mathematics
In this paper, we present an efficient numerical algorithm for approximating integrals involving highly oscillatory Bessel functions with Cauchy-type singularities.
Qinghua Wu, Mengjun Sun
doaj   +1 more source