Results 111 to 120 of about 6,326,277 (372)

Comparative Wear and Friction Analysis of Sliding Surface Materials for Hydrostatic Bearing under Oil Supply Failure Conditions

open access: yesAdvanced Engineering Materials, EarlyView.
Hydrostatic bearings excel in high‐precision applications, but their performance hinges on a continuous external supply. This study evaluates various material combinations for sliding surfaces to mitigate damage during supply failures or misalignment and to discover the most effective materials identified for enhancing the reliability and efficiency of
Michal Michalec   +6 more
wiley   +1 more source

Maximum principle for near-optimality of stochastic delay control problem

open access: yesAdvances in Difference Equations, 2017
This paper is concerned with near-optimality for stochastic control problems of linear delay systems with convex control domain and controlled diffusion. Necessary and sufficient conditions for a control to be near-optimal are established by Pontryagin’s
Feng Zhang
doaj   +1 more source

Maximum principle for certain generalized time and space fractional diffusion equations

open access: yes, 2015
. We present an inequality for fractional derivatives related to the Leibniz rule that not only answers positively a conjecture raised by J. I. Diaz, T. Pierantozi, and L.
A. Alsaedi, B. Ahmad, M. Kirane
semanticscholar   +1 more source

Uniform Anti-maximum Principles

open access: yesJournal of Differential Equations, 2000
This paper is concerned with some uniform anti-maximum principles for classes of higher-order elliptic boundary values problems \({\mathcal A}u=\lambda u+f\) in \(\Omega\) with homogeneous boundary conditions \({\mathcal B}u= 0\) on \(\partial\Omega\), where \(\Omega\) is a bounded domain in \(\mathbb{R}^n\).
Guido Sweers, Ph. Clément
openaire   +2 more sources

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

open access: yesAdvanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian   +4 more
wiley   +1 more source

MAXIMUM PRINCIPLE FOR SUBSONIC FLOW WITH VARIABLE ENTROPY

open access: yesНаучный вестник МГТУ ГА, 2017
Maximum principle for subsonic flow is fair for stationary irrotational subsonic gas flows. According to this principle, if the value of the velocity is not constant everywhere, then its maximum is achieved on the boundary and only on the boundary of the
G. B. Sizykh
doaj  

Quantum collapse rules from the maximum relative entropy principle

open access: yesNew Journal of Physics, 2016
We show that the von Neumann–Lüders collapse rules in quantum mechanics always select the unique state that maximises the quantum relative entropy with respect to the premeasurement state, subject to the constraint that the postmeasurement state has to ...
Frank Hellmann   +2 more
doaj   +1 more source

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