Results 131 to 140 of about 497,921 (244)

Inversion of a polynomial operator with the Maslov-Chebyshev symbol

open access: yesСовременная математика: Фундаментальные направления
The Maslov–Heaviside method is applied to the inversion of a polynomial operator by the Maslov–Chebyshev symbol introduced in the paper. The result is applied to the proof of a theorem on the Bessel operator in the Stepanov spaces \(S_p(\mathbb{R}^n),\) \
A. V. Kostin
doaj   +1 more source

A two-weight inequality for the Bessel potential operator [PDF]

open access: yes, 1997
summary:Necessary conditions and sufficient conditions are derived in order that \linebreak Bessel potential operator $J_{s,\lambda }$ is bounded from the weighted Lebesgue spaces $L_{v}^{p}=L^{p}(\Bbb R^n,v(x)dx)$ into $L_{u}^{q}$ when ...
Rakotondratsimba, Y.
core  

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

open access: yesVector: 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   +6 more
wiley   +1 more source

Myelin Maintenance and Addition Regulate Synaptic Plasticity in the Adult Mouse Cortex

open access: yesGlia, Volume 74, Issue 12, December 2026.
We report that existing myelin allows neurons to remain plastic throughout life, while new myelin progressively stabilises synapses along the basal but not apical dendrites of layer V pyramidal neurons in the motor cortex. ABSTRACT Myelin has the capacity to affect synapse number or plasticity across the lifespan.
Renee E. Pepper   +9 more
wiley   +1 more source

Harnack inequality for Bessel operators

open access: yes
We prove uniqueness results and Harnack inequality for Bessel operators \begin{align*} %\label{def L transf alpha} D_t-Δ_{x} -2a\cdot\nabla_xD_y- D_{yy}- \frac cy D_y % \nonumber \\[1ex]&=y^α\sum_{i,j=1}^{N+1}a_{ij}D_{ij}+y^{α-1}\left(v,\nabla\right)-by^{α-2}. \end{align*} in the strip $[0,T]\times \mathbb{R}^{N+1}_+=\{0 \leq t \leq T, x \in \
Metafune, Giorgio   +2 more
openaire   +2 more sources

PEMBENTUKAN PERSAMAAN BESSEL MELALUI SIFAT KOMUTATOR PADA ALJABAR LIE [PDF]

open access: yes, 2001
SKRIPSI INI BERTUJUAN UNTUK MEMBENTUK PERSAMAAN BESSEL MELALUI SIFAT KOMUTATOR ALJABAR LIE. UNTUK MEMBENTUK PERSAMAAN BESSEL, PERLU ADANYA SUATU OPERATOR LINIER PADA RUANG VEKTOR FUNGSI KONTINU DAN SUATU OPERASI ...
ARIF HERLAMBANG, 089511267
core   +1 more source

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

open access: yesTransactions 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

Causal (anticausal) Bessel derivative and the ultrahyperbolic Bessel operator [PDF]

open access: yes, 1998
Let B^α_C and B^α_A be ultrahyperbolic Bessel operator causal (anticausal) of the order α defined by B^α_C f = G_α ( P + i0, m, n) ∗ f , B^α f = G_α ( P −i0, m, n) ∗ f and let D^α_C and D^α_A be generalized causal (anticausal) Bessel derivative of order ...
Téllez, Manuel Aguirre   +1 more
core  

On nabla discrete fractional calculus operator for a modified Bessel equation

open access: yes, 2018
In thermal sciences, it is possible to encounter topics such as Bessel beams, Bessel functions or Bessel equations. In this work, we also present new discrete fractional solutions of the modified Bessel differential equation by means of the nabla ...
Resat Yilmazer, Okkes Ozturk
core   +1 more source

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