Results 131 to 140 of about 4,205,835 (294)
The Optimal Frequency Control Problem of a Nonlinear Oscillator
MathematicsWe study a minimum-time (time-optimal) control problem for a nonlinear pendulum-type oscillator, in which the control input is the system’s natural frequency constrained to a prescribed interval.
Victor Ilyutko +2 more
doaj +1 more source
About the new version of maximum principle of Navier-Stokes equations [PDF]
, 2015 The below shows the links of the extreme values of the velocity vector, the kinetic energy density and pressure of nonlinear Navier-Stokes equations. The latter shows the validity of the maximum principle for nonlinear Navier-Stokes equations that from a
A.Sh. Akysh
core
Advanced Materials Technologies, EarlyView.A liquid metal‐based strain‐sensing architecture to measure the deformation of a circular diaphragm against obstructed surfaces is formulated using finite element modeling and confocal imaging to establish the mechanical framework and is utilized to control diaphragm‐induced confinement on a bead array, as validated by biomolecular loading level ...
Abdullah‐Bin Siddique +4 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.Electric‐field‐assisted spin coating is introduced as a wet‐film processing route for guiding perovskite crystallization. A transient perpendicular field produces distinct structural maxima rather than monotonic grain growth: largest scanning electron microscopy (SEM)‐derived grain size at nominal 2 kV cm−1${\rm cm}^{-1}$, largest X‐ray diffraction ...
James R. Zelaya, Gary C. Tepper
wiley +1 more source
Advanced Optical Materials, EarlyView.Low‐index and low‐loss vdW muscovite represents an emerging robust dielectric platform for the creation of next‐generation all‐vdW nanophotonic architectures. Its utilization as a low‐index building‐block in all‐vdW multilayers enables extreme optical contrast when paired with MoS2, paving the way to the realization of few‐layer ultrathin DBS ...
Meri H. Hayrapetyan +10 more
wiley +1 more source
Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity
Advanced Optical Materials, EarlyView.A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio +10 more
wiley +1 more source
Maximum principles at infinity and the Ahlfors-Khas'minskii duality
, 2017 Maximum principles at infinity (or ``almost maximum principles") are a powerful tool to investigate the geometry of Riemannian manifolds. In this talk I will focus on the the Ekeland, the Omori-Yau principles and their weak versions, in the sense of ...
Mari, Luciano
core +1 more source
Jixie chuandong, 2019 In order to analyze the relationship between the nonlinear characteristics and the performance continuity reliability of rolling bearing vibration, based on chaos theory, a new concept is proposed for continuity relation dimension to characterize the ...
Cheng Li, Xia Xintao, Ye Liang
doaj
Rigid Boron‐Fused Frameworks for Efficient Near‐Infrared Emission and Optical Gain Beyond 900 nm
Advanced Optical Materials, EarlyView.Multiple‐resonance (MR)‐derived boron‐fused frameworks were integrated into narrow‐gap, long‐range charge‐transfer emitters to reduce structural relaxation and electron‐vibrational coupling. This strategy significantly decreases nonradiative losses, leading to improved near‐infrared (NIR) luminescence efficiency and low‐threshold amplified spontaneous ...
Masashi Mamada +6 more
wiley +1 more source
Blow up and quenching for a problem with nonlinear boundary conditions
Electronic Journal of Differential Equations, 2015 In this article, we study the blow up behavior of the heat equation $ u_t=u_{xx}$ with $u_x(0,t)=u^{p}(0,t)$, $u_x(a,t)=u^q(a,t)$. We also study the quenching behavior of the nonlinear parabolic equation $v_t=v_{xx}+2v_x^{2}/(1-v)$ with $v_x(0,t)=(1-v(
Nuri Ozalp, Burhan Selcuk
doaj