Results 31 to 40 of about 1,387 (185)

A highly accurate numerical method for solving boundary value problem of generalized Bagley‐Torvik equation

Mathematical Methods in the Applied Sciences, EarlyView.
A highly accurate numerical method is given for the solution of boundary value problem of generalized Bagley‐Torvik (BgT) equation with Caputo derivative of order 0<β<2$$ 0<\beta <2 $$ by using the collocation‐shooting method (C‐SM). The collocation solution is constructed in the space Sm+1(1)$$ {S}_{m+1}^{(1)} $$ as piecewise polynomials of degree at ...
Suzan Cival Buranay, Mtema James Chin, Nazim I. Mahmudov   +2 more
wiley   +1 more source

Beyond Directions: Symmetry‐Aware Rotation Sets for Triaxial Diffusion Encoding by Geometric Filter Optimization

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To improve the accuracy of diffusion‐weighted powder average signals for diffusion encoding with arbitrary b‐tensors. Methods We identify an intrinsic dihedral (D2$$ {D}_2 $$) symmetry of diffusion signals for arbitrary diffusion encoding, which defines their natural signal space (a quotient of 3D rotations).
Sune Nørhøj Jespersen, Filip Szczepankiewicz   +1 more
wiley   +1 more source

A Haar wavelet-based scheme for finding the control parameter in nonlinear inverse heat conduction equation

Open Physics, 2021
In this article, a hybrid Haar wavelet collocation method (HWCM) is proposed for the ill-posed inverse problem with unknown source control parameters. Applying numerical techniques to such problems is a challenging task due to the presence of nonlinear ...
Ahsan Muhammad, Lin Shanwei, Ahmad Masood, Nisar Muhammad, Ahmad Imtiaz, Ahmed Hijaz, Liu Xuan   +6 more
doaj   +1 more source

Detecting Loosening of Bolt‐Flanged Pipe Using Smoothed Pseudo Wigner–Ville Distribution: Digital Twin‐Based Approach Using Convolution Neural Networks

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad, Behzad Totakhaneh Bonab, Morteza Homayoun Sadeghi, Mir Mohammad Ettefagh, Mohammad Reza Chalak Qazani   +4 more
wiley   +1 more source

Multiresolution Analysis and Haar Wavelets on the Laguerre Hypergroup [PDF]

Mathematical Problems in Engineering, 2009
Let ℍn be the Heisenberg group. The fundamental manifold of the radial function space for ℍn can be denoted by [0, +∞) × ℝ, which is just the Laguerre hypergroup. In this paper the multiresolution analysis on the Laguerre hypergroup 𝕂 = [0, +∞) × ℝ is defined. Moreover the properties of Haar wavelet bases for are investigated.
Xie, Peizhu, He, Jianxun
openaire   +1 more source

Wavelet covariance approach to measure convective boundary‐layer structure

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study introduces a wavelet‐based framework that applies the Haar discrete wavelet transform (DWT) to radiosonde profiles of potential temperature and water vapor mixing ratio for diagnosing convective boundary‐layer (CBL) structure. The method objectively identifies key CBL parameters, including the surface‐layer height, entrainment zone depth ...
Song‐Lak Kang, Cho‐Rong Choi, Jung‐Hee Ryu   +2 more
wiley   +1 more source

Time-Modulated Arrays With Haar Wavelets

IEEE Antennas and Wireless Propagation Letters, 2020
Time-modulated arrays (TMAs) can effectively perform beamsteering over the first positive harmonic pattern by applying progressively delayed versions of stair-step approximations of a sine waveform to the antenna excitations. In this letter, we consider synthesizing such stair-step sine approximations by means of Haar wavelets.
Roberto Maneiro-Catoira, Julio Bregains, Jose A. Garcia-Naya, Luis Castedo   +3 more
openaire   +3 more sources

Concrete with a very high number of load cycles—Identification of stress levels for efficient investigation of fatigue behavior

Structural Concrete, EarlyView.
Abstract Fatigue stresses are receiving increasing attention in structural engineering, particularly in the design of increasingly slender structures. However, the mechanical response of concrete—particularly its fatigue behavior under very high numbers of load cycles—is still scarcely understood.
Kerstin Willers, Lutz Gerlach, Frank Dehn   +2 more
wiley   +1 more source

Thriving or Drained? The Dual Effects of AI‐autonomy on Workers’ Performance Outcomes

British Journal of Management, EarlyView.
Abstract Interest in the role of artificial intelligence (AI) within organizations has surged in recent years. However, we know little about the underlying mechanisms that connect AI usage in organizations to employee job outcomes. Drawing on self‐determination theory and self‐categorization theory, this study explores when and how perceived AI ...
Muhammad Imran Rasheed, Zahid Hameed, Sanjay Kumar Singh, Fang Lee Cooke   +3 more
wiley   +1 more source

Navigating Ethical Review Processes in Conflict‐Affected, Authoritarian Contexts: A Case Study of Myanmar's Interim Ethics Review Board (IERB)

Asia Pacific Viewpoint, EarlyView.
ABSTRACT This article examines the formation and operation of Myanmar's Interim Ethics Review Board (IERB), which was established in November 2023 by displaced academics involved in the Civil Disobedience Movement against the 2021 military coup. Operating within a highly repressive, conflict‐ridden environment, the IERB exemplifies a locally‐led and ...
Phyu Phyu Thin Zaw, Su Su Maw, Nyein Chan, The Spring IERB Team   +3 more
wiley   +1 more source