Results 131 to 140 of about 157,300 (313)
Factor analysis of correlation matrices when the number of random variables exceeds the sample size
Statistical Theory and Related Fields, 2017 Factor analysis which studies correlation matrices is an effective means of data reduction whose inference on the correlation matrix typically requires the number of random variables, p, to be relatively small and the sample size, n, to be approaching ...
Miguel Marino, Yi Li
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Estimates on the eigenvalues for some nonlinear ordinary differential operators [PDF]
, 1989 The nonlinear eigenvalue problem Lu+f(x,u)=λu in (a,b) , with u(a)=u(b)=0 , where Lu=−(p(x)u ′ ) ′ +q(x)u is the usual differential operator for Sturm-Liouville problems, f is continuous and such that f(x,0)=0 for all x , and λ is a real parameter ...
Chiappinelli, Raffaele
core
, 2013 EditorialInternational audienceIn inverse scattering theory, transmission eigenvalues can be seen as the extension of the notion of resonant frequencies for impenetrable objects to the case of penetrable dielectrics.
Cakoni, Fioralba +3 more
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Advanced Science, EarlyView.A conformal ALD‐IGZO vertical RRAM integrates volatile and nonvolatile switching within a compact 2F architecture. Before forming, tunable volatile dynamics provide fading‐memory reservoir states, while after forming, stable multilevel conductance modulation enables hardware readout.
Seeun Lee +6 more
wiley +1 more source
Representation of the norming constants by two spectra
Electronic Journal of Differential Equations, 2010 The representation of the norming constants by 2 spectra was studied by Levitan, Gasymov (and others) for the Sturm-Liouville problem with boundary conditions $y(0)cosalpha +y'(0)sinalpha=0$, $y(pi)coseta+y'(pi)sineta =0$, when $sin alpha eq 0$ and $
Tigran N. Harutyunyan
doaj
Truncations in the method of intermediate problems for lower bounds to eigenvalues
, 1961 Two new procedures are developed for determining lower bounds to the eigenvalues of linear operators. The methods are based on the theory of semibounded self-adjoint operators in separable Hilbert space.
Bazley, Norman W.; Fox, David W.
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Perceived Time Shapes Physical Fatigue Accumulation and Its Neural Oscillatory Correlates
Advanced Science, EarlyView.Can a clock change the course of physical fatigue? By covertly manipulating the clock calibration during repeated isometric contractions, we showed that perceived time shapes fatigue accumulation and frontal oscillatory dynamics. While fatigue accumulation was only reduced when the clock was slowed down, frontal oscillatory dynamics followed perceived ...
Pierre‐Marie Matta +3 more
wiley +1 more source
Bienenfeld’s approximation of production prices and eigenvalue distribution: some more evidence from five European economies [PDF]
This paper tests Bienenfeld’s polynomial approximation of production prices using data from ten symmetric input-output tables of five European economies.
Iliadi, Fotoula +3 more
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Transparent Topological Meta‐Diplexer via Tightly Confined Valley Surface States
Advanced Science, EarlyView.An optically transparent topological metasurface supporting tightly confined valley surface states enables robust and flexible wave routing in an ultrathin platform. A compact transparent meta‐diplexer with spatially and spectrally separated channels is realized, while communication experiments verify high‐fidelity signal transmission, opening new ...
Sijie Li +5 more
wiley +1 more source
On an eigenvalue problem associated with the (p, q) − Laplacian
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria MatematicaLet Ω ⊂ ℝN, N ≥ 2, be a bounded domain with smooth boundary ∂Ω. Consider the following generalized Robin-Steklov eigenvalue problem associated with the operator 𝒜u = − Δpu − Δqu {𝒜u+ρ1(x)|u|p-2u+ρ2(x)|u|q-2u=λα(x)|u|r-2u, x∈Ω,∂u∂vA+γ1(x)|u|p-2u+γ2(x)|u|
Barbu Luminiţa +2 more
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