Results 131 to 140 of about 123,177 (247)
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT Classical Zero Vibration (ZV) and Zero Vibration and Derivative (ZVD) input shapers are designed around a fixed nominal natural frequency and cannot accommodate the time‐varying dynamics introduced when an overhead crane simultaneously travels and hoists a payload.
Mohammad Alfares, Khaled Alhazza
wiley +1 more source
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT Accurate modeling of vibrating machines equipped with Neidhart springs is challenging due to the strong nonlinearities introduced by the elastomer–metal torsional elements and the constraints imposed by their kinematic arrangement. Multibody modeling methodologies for such vibrating machines are often computationally demanding, thus limiting ...
Davide Galli +3 more
wiley +1 more source
An Adaptive Multiple Shooting Strategy for Optimal Control
Optimal Control Applications and Methods, EarlyView.We study how multiple shooting affects the convergence of Newton‐type methods for optimal control, comparing several shooting strategies across 40 benchmark problems. The study covers interior‐point and sequential quadratic programming methods with both Quasi‐Newton approximations and exact Hessians.
Robert Lampel, Sebastian Sager
wiley +1 more source
Polymer Engineering &Science, EarlyView.Numerical simulation of polyethylene rotational molding using the Smoothed Particle Hydrodynamics (SPH) method. ABSTRACT This work presents the development of a numerical model based on the smoothed particle hydrodynamics (SPH) method to simulate the rotational molding process of powder thermoplastic polymers, used in the manufacture of liners for high‐
Ali Nourreddine +4 more
wiley +1 more source
Disposition Model for Permafrost Degradation in Mountainous Regions
Permafrost and Periglacial Processes, EarlyView.ABSTRACT Permafrost is a widespread thermal phenomenon in Arctic and high mountain regions that, in combination with steep terrain, exerts a key control on slope stability. Its degradation in response to climatic warming can modify the likelihood and timing of rockfall, debris flow and related mass movements. Robust information on the current state and
Peter Mani +4 more
wiley +1 more source
Invariant Boltzmann-Shannon Entropy for Black-Holes: A Manifestly-Covariant Canonical Quantum-Gravity Approach. [PDF]
Entropy (Basel)Cremaschini C +2 more
europepmc +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.A new method compares both kilometer and sub‐kilometre weather model simulations with Doppler lidar observations to assess the representation of boundary‐layer turbulence. While bulk boundary‐layer properties are well represented, vertical velocity variance is strongly underestimated in both simulations.
Natalie J. Harvey +7 more
wiley +1 more source
The increased drift of steep focusing surface gravity waves. [PDF]
J Fluid MechBlaser A, Lenain L, Pizzo N.
europepmc +1 more source
Scaling turbulence drives the general circulation
Quarterly Journal of the Royal Meteorological Society, EarlyView.The NOAA Gulfstream SP4, which deployed the GPS dropsondes over the NE Pacific Ocean as part of the Winter Storms Project during the January–March periods of 2004, 2005 and 2006. Abstract Statistical multifractal analysis of airborne and dropsonde observations is used to show that persistence of velocity after molecular collisions breaks the continuous
Adrian F. Tuck
wiley +1 more source
Coupled air-sea interactions drove and sustained the 2013-2016 North Pacific marine heatwave. [PDF]
Nat CommunJiang W, Forget G, Song Y, Haine TWN.
europepmc +1 more source