Results 241 to 250 of about 154,377 (300)

Can ISO/IEC 17025 serve as a tool to prevent scientific fraud in chemical research laboratories?

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Scientific fraud has been documented across multiple disciplines, and chemistry is no exception. Recent studies indicate that contamination of materials, methodological errors, and unreliable data, results, or analyses account for over 25% of retracted publications.
Flor Monica Gutierrez‐Alcantara
wiley   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Development of Disordered Weight Control Behaviors and Its Progression to Eating Disorders in Canada: A Nationally Representative Microsimulation

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Eating disorders (ED) present a significant health burden to children, adolescents, and young adults globally. Despite the importance of disordered weight control behaviors (DWCB) in ED development, little is known about the progression from DWCB to ED.
Ye Shen, Ariel L. Beccia, Nicolas A. Menzies, Chloe Gao, S. Bryn Austin, Amanda Raffoul   +5 more
wiley   +1 more source

Disturbance rejection in multivariable systems

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Robust disturbance rejection

Proceedings of 1995 34th IEEE Conference on Decision and Control, 2002
The problem of robust asymptotic disturbance rejection for systems involving parametric uncertainties is studied. A design method is proposed that is based on polynomial techniques. Various uncertainty structures are considered including single and multiple parameters as well as affine, polynomic and even non-polynomic cases.
M. Sebek, F.J. Kraus
openaire   +1 more source

Fractional active disturbance rejection control

ISA Transactions, 2016
A fractional active disturbance rejection control (FADRC) scheme is proposed to improve the performance of commensurate linear fractional order systems (FOS) and the robust analysis shows that the controller is also applicable to incommensurate linear FOS control.
Dazi, Li, Pan, Ding, Zhiqiang, Gao
openaire   +2 more sources

On perfect disturbance rejection

Proceedings of 32nd IEEE Conference on Decision and Control, 2002
A new observer-based approach to perfect disturbance rejection in linear continuous systems is introduced. A technique of continuous deadbeat observation is exploited to estimate the disturbance signal described by a known dynamic model. A realization condition in the form of linear algebraic equations is derived.
A. Medvedev, G. Hillerstrom
openaire   +1 more source

Adaptive disturbance rejection

[1991] Proceedings of the 30th IEEE Conference on Decision and Control, 2002
Using averaging analysis a novel direct adaptive algorithm applied to a linear plant is analyzed. The prior knowledge includes a nominal model and a stabilizing controller for the plant. It is shown that the stabilizing controller can be augmented with an adaptive controller solely aimed at disturbance rejection/trajectory following. The overall scheme
Z. Wang, I.M.Y. Mareels, J.B. Moore
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Steering Torque Disturbance Rejection

SAE International Journal of Vehicle Dynamics, Stability, and NVH, 2017
<div class="section abstract"><div class="htmlview paragraph">The layout of a vehicle steering system has to resolve a compromise. While it is important for lateral vehicle control to feel steering torque feedback of lateral tire to ground interaction, disturbing forces shall not be present in the feedback steering torque.
Jens Dornhege, Simon Nolden, Martin Mayer   +2 more
openaire   +1 more source

Decoupling and disturbance rejection

IEEE Transactions on Automatic Control, 1975
For the linear multivariable system \dot{x} = Ax + Bu + Er, z_{i} = D_{i}x(i \in k), x \in X , with disturbance \Gamma(\cdot) , it is shown that the decoupling problem and disturbance rejection problem are simultaneously solvable, so as to yield a stable closed-loop system, if and only if Im(E)\subset V_{g}^{*} and R_{i}^{*} + \ker D_{i} = X, i \in k .
Fabian, E., Wonham, W. M.
openaire   +1 more source