Results 121 to 130 of about 433,637 (312)

Nonlinear optimisation method for image segmentation and noise reduction using geometrical intrinsic properties [PDF]

, 2006
This paper considers the optimisation of a nonlinear functional for image segmentation and noise reduction. Equations optimising this functional are derived and employed to detect edges using geometrical intrinsic properties such as metric and Riemann ...
Sharif, Bayan, Mahmoodi, Sasan
core  

Apparent Masses of Seated Human Body with Tri-Axis Vibration: Combined Effect of In-Line Magnitude, Cross-Axis Magnitude, and Backrest Inclination

Applied Sciences
Despite the presence of multi-axis vibration in many vehicles, biodynamic responses of the human body are mostly studied under single-axis conditions.
Weitan Yin, Yi Qiu, Fengqin Li, Zefeng Lin, Chi Liu, Xu Zheng, Qianqian Chen   +6 more
doaj   +1 more source

Does Long‐Term Lower Extremity Strength Training in Adults With Knee Osteoarthritis and Varus Alignment Reduce Knee Joint Loading During Gait?

Arthritis Care &Research, EarlyView.
Objective We examined whether 18 months of strength training in individuals with knee varus alignment and medial tibiofemoral osteoarthritis (OA) reduced knee joint loads during walking compared to an attention control group. Methods This study was a secondary analysis of a randomized clinical trial that compared the effects of strength training to a ...
Stephen P. Messier, Matthew N. Vigliotti, Paige E. Rice, Brian Pietrosimone, Shannon L. Mihalko, Edward H. Ip, Richard F. Loeser, David J. Hunter, Ali Guermazi, Ryan Hill, Santiago Saldana, Kim L. Bennell, Paul DeVita   +12 more
wiley   +1 more source

Grain flow signal reduction noise using EMD [PDF]

, 2015
In order to remove noise from grain flow signal, this paper investigated a new method using empirical mode decomposition (EMD). Grain flow signal with noise is decomposed adaptively into intrinsic mode functions (IMFs) that contain specific frequency ...
Hu JT(胡静涛), Wang H(王鹤)
core  

Discordance Between Systemic Lupus Erythematosus Disease Activity Index Domain Weights and Their Association With Organ Damage Accrual

Arthritis Care &Research, EarlyView.
Objective Studies of damage accrual in patients with systemic lupus erythematosus (SLE) show associations with disease activity measured by the SLE Disease Activity Index 2000 (SLEDAI‐2K), but these associations are imperfect. SLEDAI scores are powerfully influenced by weightings (1–8) assigned to each domain.
Kevin Zhang, Eric F. Morand, Sarah E. Boyd, François Petitjean, Alberta Hoi, Rachel Koelmeyer, Iolanda Miceli, Julie A. Monk, Hieu T. Nim   +8 more
wiley   +1 more source

Open Rotor Noise Impact on Airport Communities [PARTNER Project 35 Final Report] [PDF]

FAA Award No. 09-C-NE-GITThe highly tonal noise spectra produced by Open Rotor (OR) engines differ greatly from the relatively smooth, atonal noise spectra produced by typical Turbofan (TF) engines. Understanding the effects of these spectral differences
Massachusetts Institute of Technology, Young, Russell, Partnership for Air Transportation Noise and Emissions Reduction, Havrilesko, Ben, Mavris, Dimitri, Tai, Jimmy   +5 more
core  

Simulations on the wind noise reduction by spherical shell windscreens [PDF]

, 2017
© 2017 Institute of Noise Control Engineering. All rights reserved. Various windscreens are widely used in outdoor acoustic measurements to reduce the effect of the wind induced pressure fluctuations at the microphones and to improve the measurement ...
Zhao, S, Qiu, X, Cheng, E, Burnett, I, Liu, CC   +4 more
core  

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

A Noise Reduction Study on Flow-Permeable Trailing-Edges [PDF]

, 2007
This paper summarizes the results of an experimental study on flow-permeable comb-type trailing-edges which have the potential to effectively reduce turbulent boundary-layer trailing-edge noise.
Herr, Michaela
core  

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane, Salama Makni, Mourad Kchaou, Ahmed El Hajjaji   +3 more
wiley   +1 more source