Results 91 to 100 of about 18,436 (217)
Hilbert-Space Fragmentation from Strict Confinement. [PDF]
Phys Rev Lett, 2020 Yang ZC, Liu F, Gorshkov AV, Iadecola T.
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International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad +4 more
wiley +1 more source
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT This paper presents a Physics‐Informed Koopman Operator (PIKO) framework integrated with a discrete‐time Sequential Action Control (SAC) for real‐time, decentralized control of a modular aerial parcel delivery robot composed of multiple independently actuated propeller modules.
Archit Krishna Kamath +2 more
wiley +1 more source
Essential g-Ascent and g-Descent of a Closed Linear Relation in Hilbert Spaces
Extracta Mathematicae, 2017 We define and discuss for a closed linear relation in a Hilbert space the notions of essential g-ascent (resp. g-descent) and g-ascent (resp. g-descent) spectrums. We improve in the Hilbert space case some results given by E.
Zied Garbouj, Haı̈kel Skhiri
doaj
Estimating the critical angle of top near‐surface layers on the Moon
Near Surface Geophysics, EarlyView.Abstract Near‐surface characterization of the lunar subsurface is essential for future exploration and infrastructure development, particularly for the construction of underground habitats that provide protection against radiation and micrometeorites. However, conventional seismic approaches for estimating subsurface properties typically rely on prior ...
Nelson Ricardo Coelho Flores Zuniga +1 more
wiley +1 more source
Psychology in the Schools, EarlyView.ABSTRACT The purpose of this study was to inform the continued development and refinement of the Resilience Education Program (REP), a Tier 2 targeted intervention for students in grades 4–8 exhibiting early signs of internalizing problems. Parents (n = 7), teachers (n = 7), school mental health professionals (n = 11), and researchers (n = 6 ...
Stephen Kilgus +7 more
wiley +1 more source
Frameness bound for frame of subspaces
Sahand Communications in Mathematical Analysis, 2014 In this paper, we show that in each nite dimensional Hilbert space, a frame of subspaces is an ultra Bessel sequence of subspaces. We also show that every frame of subspaces in a nite dimensional Hilbert space has frameness bound.
M. R. Abdollahpour, A. Shekari
doaj
High-Order Sequential Simulation via Statistical Learning in Reproducing Kernel Hilbert Space. [PDF]
Math Geosci, 2020 Yao L, Dimitrakopoulos R, Gamache M.
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New views of some invariants associated with the Cartesian 2D velocity gradient tensor
Quarterly Journal of the Royal Meteorological Society, EarlyView.Vorticity and divergence of horizontal flow are fundamental quantities in meteorology; both are linear functions of the four elements of the 2D velocity gradient tensor and both are formally unchanged under coordinate rotation. We explore four quadratic functions of the elements that are geometrically invariant in this sense, finding some novel ...
I. Roulstone, S. A. Clough, A. A. White
wiley +1 more source
Theory of Response to Perturbations in Non-Hermitian Systems Using Five-Hilbert-Space Reformulation of Unitary Quantum Mechanics. [PDF]
Entropy (Basel), 2020 Znojil M.
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