Results 21 to 30 of about 427,842 (217)

Nonlinear vibration analysis of axially moving strings in thermal environment [PDF]

Journal of Theoretical and Applied Vibration and Acoustics, 2018
In this study, nonlinear vibration of axially moving strings in thermal environment is investigated. The vibration haracteristics of the system such as natural frequencies, time domain response and stability states are studied at different temperatures ...
Hassan Nahvi, Hosein Amani, Reza Tikani
doaj   +1 more source

Study on TVD parameters sensitivity of a crankshaft using multiple scale and state space method considering quadratic and cubic non-linearities

Latin American Journal of Solids and Structures
In this paper the effect of quadratic and cubic non-linearities of the system consisting of the crankshaft and torsional vibration damper (TVD) is taken into account.
R. Talebitooti, M. Morovati
doaj   +1 more source

Stability Analysis of a Strongly Displacement Time-Delayed Duffing Oscillator Using Multiple Scales Homotopy Perturbation Method [PDF]

Journal of Applied and Computational Mechanics, 2018
In the present study, some perturbation methods are applied to Duffing equations having a displacement time-delayed variable to study the stability of such systems.
Yusry El-Dib
doaj   +1 more source

Nonlinear dynamics and stability of a strongly nonlinear damped cubic-quintic oscillator

Journal of King Saud University: Engineering Sciences
This paper presents a stability analysis of a strongly nonlinear damped cubic-quintic oscillator using three approaches: the classical multiple scales (CMS) method, an enriched multiple scales (EMS) method based on homotopy perturbation, and numerical ...
Hussain Al-Qahtani
doaj   +1 more source

Health‐Related Social Needs in Children With Sickle Cell Disease Are Associated With Worse Health‐Related Quality of Life

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell disease (SCD) face multiple acute and chronic medical complications that may impact their quality of life as reported by patients themselves. Health‐related social needs (HRSNs), such as food and housing insecurity, are common in people with SCD, but the association between HRSNs and patient‐reported ...
Sarah J. Marks, Molly Sonenklar, Cerelia Donald, Cecelia Valrie, Wally Smith, India Sisler   +5 more
wiley   +1 more source

First-Order Approximate Solutions for Nonlinear Smooth-Discontinuous (SD) Oscillator via Spreading Residue Harmonic Balance and Multiple Scales Methods

Mathematics
This study presents a numerical and analytical investigation of the nonlinear smooth-discontinuous (SD) oscillator. The nonlinear restoring force is approximated by a fifth-order polynomial using a Taylor series expansion to simplify the governing ...
Khalid Alluhydan, M. N. Abd EL-Salam
doaj   +1 more source

Application of the method of multiple scales for nonlinear vibration analysis of mechanical systems with dry and lubricated clearance joints [PDF]

Journal of Theoretical and Applied Vibration and Acoustics, 2017
In this study, the method of multiple scales is used to perform a nonlinear vibration analysis of a mechanical system in two cases; with dry and lubricated clearance joints.
Saeed Ebrahimi, Esmaeil Salahshoor, Mohsen Maasoomi   +2 more
doaj   +1 more source

An Object-Based Approach for Mapping Crop Coverage Using Multiscale Weighted and Machine Learning Methods

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Accurate mapping of crop distribution on Earth's surface aids in predicting grain production. Pattern classification along with remote sensing imagery can facilitate traditional manual field measurement techniques using machine learning.
Zengwei Tang, Hong Wang, Xiaobing Li, Xiaohui Li, Wenjie Cai, Chongyuan Han   +5 more
doaj   +1 more source

Feasibility and Safety of Somato‐Cognitive Coordination Therapy for Cerebellar Ataxia Following Pediatric Brain Tumor Treatment

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Cerebellar ataxia after pediatric brain tumor treatment can cause persistent gait, balance, and speech impairment, yet no established rehabilitation strategy exists. Somato‐cognitive coordination therapy (SCCT) is a virtual reality–guided intervention designed to promote sensorimotor integration through visually constrained reaching
Masanobu Takeuchi, Takashi Matsuzawa, Jun Yamanishi, Masahiro Yoshitomi, Junji Ikeda, Shin‐Ichi Tsujimoto, Yasuteru Yamaguchi, Norio Shiba, Dhroov Pathare, Ayumi Kato, Masahiko Hara   +10 more
wiley   +1 more source

Application of Multiple-Scales Method for the Dynamic Modelling of a Gear Coupling

Applied Sciences, 2019
Thin-walled gears, designed for aeronautical applications, have shown very rich dynamics that must be investigated in advance of the design phase. One of the signatures of their dynamics is coupling due to the meshing teeth which stand-alone gear models ...
Enrico Pipitone, Christian Maria Firrone, Stefano Zucca   +2 more
doaj   +1 more source