Results 61 to 70 of about 44,289 (259)
International Journal of Osteoarchaeology, EarlyView.ABSTRACT Sharp force trauma (SFT) is the main criterion used to identify chop mark butchery in zooarchaeology, yet its reliability as a diagnostic feature has not been systematically tested. Chop marks reflect both cutting and fracturing processes and exhibit characteristics of both sharp and blunt trauma.
Tiffany Okaluk +4 more
wiley +1 more source
HyLPD Digital Twin Control for UAV Stability in High‐Wind Conditions
Optimal Control Applications and Methods, EarlyView.This work introduces a novel HyLPD, a hybrid control framework combining Linear Quadratic Regulator (LQR) for baseline stability and Deep Deterministic Policy Gradient (DDPG) for adaptive compensation, tailored for UAVs under high‐wind conditions.
Cara Rose +2 more
wiley +1 more source
Applying Dynamics/Cost Parameter Continuation to the Optimal Guidance of Variable‐Speed Unicycle
Optimal Control Applications and Methods, EarlyView.(a) Classical parameter continuation method diverges. (b) Dynamics/cost parameter continuation method converges. ABSTRACT The problem of a variable‐speed unicycle guidance to the stationary target is considered. The vehicle should be guided to the origin while minimizing the energy loss due to the induced drag.
Gleb Merkulov +2 more
wiley +1 more source
Bouncing ball dynamics: simple model of motion of the table and sinusoidal motion
, 2013 Nonlinear dynamics of a bouncing ball moving vertically in a gravitational field and colliding with a moving limiter is considered and the Poincar\'e map, describing evolution from an impact to the next impact, is described.
Okniński, Andrzej +1 more
core +1 more source
Cooperative human signals to honeyguides form local dialects
People and Nature, EarlyView.Abstract Human language enables the exchange of complex information and precise instructions for collaborative planning and action. It rapidly evolves through social learning, generating diverse cultural communication signals used not only with other humans, but also with domesticated animals bred or trained to respond.
Jessica E. M. van der Wal +5 more
wiley +1 more source
Fractal and FractionalThis paper proposes a novel nonlinear speed control method for permanent magnet synchronous motors that enhances their robustness and tracking performance.
Ameen Ullah +3 more
doaj +1 more source
Sensors, 2018 Electromechanical actuator (EMA) systems are widely employed in missiles. Due to the influence of the nonlinearities, there is a flat-top of about 64 ms when tracking the small-angle sinusoidal signals, which significantly reduces the performance of the ...
Man Zhou +4 more
doaj +1 more source
Sliding Mode Controller for Nonlinear System Based on Genetic Algorithm [PDF]
Engineering and Technology Journal, 2014 Sliding Mode Controller (SMC) is a simple and effective method to recognize a robust controller for nonlinear system. It is a strong mathematical tool which gives a nonlinear robust controller with acceptable performance. The chattering phenomenon is the
Ahmed Khalaf Hamoudi
doaj +1 more source
Theory of Direct Scattering, Trapping and Desorption in Atom-Surface Collisions
, 2008 When gas atoms or molecules collide with clean and ordered surfaces, under many circumstances the energy-resolved scattering spectra exhibit two clearly distinct features due to direct scattering and to trapping in the physisorption well with subsequent ...
A. Sjölander, Guoqing Fan, J. R. Manson
core +1 more source
Homogeneous Observer‐Based Affine Formation Tracking
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This article addresses the control of mobile agents, termed followers, to track a time‐varying affine formation specified by a set of leaders. We present a distributed hierarchical method composed of a homogeneous high‐order sliding mode observer and a tracking controller. The observer estimates the followers' target trajectories from neighbor
Rodrigo Aldana‐López +3 more
wiley +1 more source