Results 141 to 150 of about 21,121 (253)

In Situ Acoustic Monitoring of Focused Femtosecond Pulse Duration in Air

Laser &Photonics Reviews, EarlyView.
Air‐breakdown acoustics at the laser focus is used to determine femtosecond pulse duration with a simple USB microphone. By chirp‐tuning and compressing 1030 nm pulses from 241 to 50 fs, the acoustic amplitude scales inversely proportional to the square root of the pulse duration, enabling in situ readout over 50 fs–5 ps—crucial for precise pulse ...
Indrė Meškėlaitė, Hsin‐Hui Huang, Haoran Mu, Nguyen Hoai An Le, Tomas Katkus, Edvinas Aleksandravičius, Gabrielius Kontenis, Domas Paipulas, Saulius Juodkazis, Darius Gailevičius   +9 more
wiley   +1 more source

Multicomponent stress-strength reliability analysis using the inverted exponentiated rayleigh distribution under block adaptive type-II progressive hybrid censoring and k-records. [PDF]

Sci Rep
Newer HA.
europepmc   +1 more source

Phase Multiplexed Optical Computing: Reconfiguring a Multi‐Task Diffractive Optical Processor Using Illumination Phase Diversity

Laser &Photonics Reviews, EarlyView.
A monochrome multi‐task diffractive optical network architecture is designed to leverage illumination‐phase multiplexing to dynamically reconfigure its output function and accurately implement a large set of complex‐valued linear transformations between an input and an output aperture.
Xiao Wang, Aydogan Ozcan
wiley   +1 more source

Evaluating and upgrading the performance of a bridge network structure with Rayleigh distribution lifetimes. [PDF]

PLoS One
Nabwey HA, El-Faheem AA, Denguir MA, Rashad AM.   +3 more
europepmc   +1 more source

Activation and Detection of Forbidden Low‐Frequency Raman Modes in MoS2 by Near‐Field Gradient Illumination

Laser &Photonics Reviews, EarlyView.
Low‐frequency Raman‐forbidden interlayer phonons in 2D materials are typically hidden by selection rules. Here, we demonstrate that plasmonic near‐field gradients can activate and detect these forbidden low‐frequency modes in a few‐layer MoS2 sample, unveiling a gradient‐driven mechanism for revealing hidden interlayer vibrations and breaking symmetry.
Zhen Zong, Ryosuke Morisaki, Kanami Sugiyama, Masahiro Higashi, Takayuki Umakoshi, Prabhat Verma   +5 more
wiley   +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

A new two-parameter Rayleigh distribution: Statistical properties, actuarial measures, regression analysis, and applications. [PDF]

Heliyon
Gemeay AM, Hussam E, Almetwally EM.
europepmc   +1 more source

Enhanced Control Strategies for Residual‐Vibration Suppression and Adaptive Tracking in Flexible Manipulator Under Unknown Bounded Disturbances

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This paper proposes a hybrid control strategy for flexible‐link manipulators that combines offline trajectory planning with adaptive tracking to suppress residual elastic vibration (REV) under unknown bounded disturbances. A rigid–flexible coupling dynamics model is first established using the floating‐frame method and Lagrange's equations ...
Mingming Shi, Bao Rong, Xiaoting Rui, Guoping Wang, Xiaoli Dong, Xin Zhao   +5 more
wiley   +1 more source

Group acceptance sampling plan based on truncated life tests for Type-I heavy-tailed Rayleigh distribution. [PDF]

Heliyon
Nwankwo MP, Alsadat N, Kumar A, Bahloul MM, Obulezi OJ.   +4 more
europepmc   +1 more source

On Order Restricted Inference in Multi‐Step Stage Life Testing for a General Family of Distributions

Naval Research Logistics (NRL), EarlyView.
ABSTRACT Recently, k$$ k $$‐step stage life testing (SLT) has been proposed by Laumen and Cramer (2021) as a natural extension of progressive censoring with fixed censoring times (PC‐FCT) as well as of simple step‐stress accelerated life testing (SSALT).
Erhard Cramer, Ayan Pal, Debashis Samanta   +2 more
wiley   +1 more source