Results 61 to 70 of about 80,472 (232)
Numerical approaches to time evolution of complex quantum systems
, 2009 We examine several numerical techniques for the calculation of the dynamics of quantum systems. In particular, we single out an iterative method which is based on expanding the time evolution operator into a finite series of Chebyshev polynomials.
Abrahams +30 more
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Advanced Science, EarlyView.The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova +8 more
wiley +1 more source
Prediction of Dynamic Stability Using Mapped Chebyshev Pseudospectral Method
International Journal of Aerospace Engineering, 2018 A mapped Chebyshev pseudospectral method is extended to solve three-dimensional unsteady flow problems. As the classical Chebyshev spectral approach can lead to numerical instabilities due to ill conditioning of the spectral matrix, the Chebyshev points ...
Jae-Young Choi +3 more
doaj +1 more source
A Low-Complexity Massive MIMO Precoding Algorithm Based on Chebyshev Iteration
IEEE Access, 2017 Precoding algorithm is used to transmit signals effectively and to reduce the interferences from other user terminals in the massive multiple-input-multiple-output (MIMO) systems. In order to decrease the computational complexity of the precoding matrix,
Chi Zhang +5 more
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Journal of Function Spaces, 2022 This paper deals with Chebyshev wavelets. We analyze their properties computing their Fourier transform. Moreover, we discuss the differential properties of Chebyshev wavelets due to the connection coefficients.
Emanuel Guariglia +1 more
doaj +1 more source
On Polynomial Multiplication in Chebyshev Basis
, 2012 In a recent paper Lima, Panario and Wang have provided a new method to multiply polynomials in Chebyshev basis which aims at reducing the total number of multiplication when polynomials have small degree.
Giorgi, Pascal
core +3 more sources
Chebyshev centers, ?-Chebyshev centers and the Hausdorff metric
Manuscripta Mathematica, 1989 In this paper, we affirmatively answer an open question raised by P.Szeptycki and Vlech in (9) and give a new characterization of p-uniformly convex Banach space. The Lipschitz stability of the set of e-Chebyshev centers Ge(A) under the perturbations of A and G is also proved.
Wang, Jia-ping, Yu, Xin-tai
openaire +1 more source
Electric‐Current‐Induced Phase Transformation in Cu6Sn5 Below Its Equilibrium Transition Temperature
Advanced Science, EarlyView.Electric current induces a monoclinic‐to‐hexagonal phase transformation in Cu6Sn5 at a measured bulk temperature of ∼120°C, below the equilibrium transition temperature. Ex situ synchrotron x‐ray diffraction, TEM, and matched thermal controls show that current stressing promotes the formation of a retained hexagonal η‐phase post‐stress state not ...
Shih‐kang Lin +3 more
wiley +1 more source
A New Fractional Integration Operational Matrix of Chebyshev Wavelets in Fractional Delay Systems
Fractal and Fractional, 2019 Fractional integration operational matrix of Chebyshev wavelets based on the Riemann−Liouville fractional integral operator is derived directly from Chebyshev wavelets for the first time.
Iman Malmir
doaj +1 more source
Calculation of Densities of States and Spectral Functions by Chebyshev Recursion and Maximum Entropy
, 1997 We present an efficient algorithm for calculating spectral properties of large sparse Hamiltonian matrices such as densities of states and spectral functions.
A. F. Voter +26 more
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