Results 11 to 20 of about 27,174,491 (303)
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
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Modelling multiple time-scales with flexible parametric survival models
BMC Medical Research Methodology, 2022 Background There are situations when we need to model multiple time-scales in survival analysis. A usual approach in this setting would involve fitting Cox or Poisson models to a time-split dataset.
Nurgul Batyrbekova +7 more
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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
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Remote Sensing, 2021 Monitoring vegetation net primary productivity (NPP) is very important for evaluating ecosystem health. However, the nonlinear characteristics of the vegetation NPP remain unclear in the six provinces along the Maritime Silk Road in China. In this study,
Peng Xue +4 more
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The method of variation of constants and multiple time scales in orbital mechanics [PDF]
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2003 The method of variation of constants is an important tool used to solve systems of ordinary differential equations, and was invented by Euler and Lagrange to solve a problem in orbital mechanics. This methodology assumes that certain “constants” associated with a homogeneous problem will vary in time in response to an external force. It also introduces
Newman, William I., Efroimsky, Michael
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On Simulating Flows with Multiple Time Scales Using a Method of Averages [PDF]
Theoretical and Computational Fluid Dynamics, 1997 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nadiga, B. T. +3 more
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Non-Abelian Kubo Formula and the Multiple Time-Scale Method [PDF]
Annals of Physics, 1996 The non-Abelian Kubo formula is derived from the kinetic theory. That expression is compared with the one obtained using the eikonal for a Chern-Simons theory. The multiple time-scale method is used to solve the non-Abelian Kubo formula, and the damping rate for longitudinal color waves is computed.
Zhang, Xiaofei, Li, Jiarong
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IEEE Access, 2020 Machinery devices often consist of mechanical mechanisms that are actuated by fluid power systems. In many applications, the mechanical system can be modelled and analysed in terms of the multi-body system dynamics.
Mehran Kiani-Oshtorjani +4 more
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Agronomy, 2023 Water and thermal resources are changing significantly because of climate change, further affecting important crops, such as grains, worldwide. Previous studies on climate change trends and their impacts on grain yield were mainly conducted on a single ...
Xuefang Feng +5 more
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Topological shadowing methods in arnold diffusion: weak torsion and multiple time scales
Nonlinearity, 2022 Abstract Consider a map which possesses a normally hyperbolic invariant manifold of any even dimension with transverse homoclinic channels. We develop a topological shadowing argument to prove the existence of Arnold diffusion along the invariant manifold, shadowing some iterations of the inner dynamics carried by the invariant manifold ...
Clarke, Andrew +2 more
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