Results 51 to 60 of about 892,367 (145)

A LIBS Spectral Self-Absorption Correction Method Using Voigt Profile Fitting for the Application of Magnesium Analysis in Phosphorus Ore

, 2020
The concentration of MgO is one of the most important parameters in the phosphate ore flotation. The fast detection of the concentration of MgO has great significance for the optimization of the flotation, the improvement of the efficiency and the ...
Sun Lan-xiang, Qi Li-feng, Zeng Peng, Zhang Peng, Yu Hai-bin   +4 more
core   +1 more source

Application of a Legendre collocation method to the space–time variable fractional-order advection–dispersion equation

Journal of Taibah University for Science, 2019
In this paper, an efficient spectral collocation method is presented for solving the space–time variable-order fractional advection–dispersion equations (ST-VO-FADE).
F. Mallawi, J. F. Alzaidy, R. M. Hafez
doaj   +1 more source

Non-Polynomial Collocation Spectral Scheme for Systems of Nonlinear Caputo–Hadamard Differential Equations

Fractal and Fractional
In this paper, we provide a collocation spectral scheme for systems of nonlinear Caputo–Hadamard differential equations. Since the Caputo–Hadamard operators contain logarithmic kernels, their solutions can not be well approximated using the usual ...
Mahmoud A. Zaky, Ibrahem G. Ameen, Mohammed Babatin, Ali Akgül, Magda Hammad, António M. Lopes   +5 more
doaj   +1 more source

A reduced order extrapolating technique of solution coefficient vectors to collocation spectral method for telegraph equation

Advances in Difference Equations, 2020
In this article, we mainly develop a reduced order extrapolating model for the solution coefficient vectors of the classical collocation spectral (CCS) scheme to the two-dimensional (2D) telegraph equation by means of a proper orthogonal decomposition ...
Hui Wang, Qingfang He, Zhendong Luo
doaj   +1 more source

Optimal Dynamics Control in Trajectory Tracking of Industrial Robots Based on Adaptive Gaussian Pseudo-Spectral Algorithm

Algorithms
A pseudo-spectral control algorithm based on adaptive Gauss collocation point reconstruction is proposed to efficiently solve the optimal dynamics control problem of industrial robots.
Jing Zhang, Xiaokai Zhu, Te Chen, Guowei Dou   +3 more
doaj   +1 more source

Spectral-Collocation Methods for Fractional Pantograph Delay-Integrodifferential Equations

Advances in Mathematical Physics, 2013
We propose and analyze a spectral Jacobi-collocation approximation for fractional order integrodifferential equations of Volterra type with pantograph delay. The fractional derivative is described in the Caputo sense. We provide a rigorous error analysis
Yin Yang, Yunqing Huang
doaj   +1 more source

Nightside studies of coherent HF radar spectral width behaviour [PDF]

, 2002
A previous case study found a relationship between high spectral width measured by the CUTLASS Finland HF radar and elevated electron temperatures observed by the EISCAT and ESR incoherent scatter radars in the post-midnight sector of magnetic local time.
J. A. Davies, Davies, J.A., Eglitis, P., P. Eglitis (7605143), P. Eglitis, Woodfield, E.E., Lester, M., Lockwood, M., Lockwood, Mike, M. Lester, J. A. Davies (4412452), T. K. Yeoman (7601525), T. K. Yeoman, M. Lester (7589660), Davies, J. A., M. Lockwood, M. Lockwood (7612331), E. E. Woodfield (7590071), E. E. Woodfield, Yeoman, T. K., Yeoman, T.K., Woodfield, E. E.   +21 more
core   +2 more sources

Spectral collocation methods [PDF]

, 1987
This review covers the theory and application of spectral collocation methods. Section 1 describes the fundamentals, and summarizes results pertaining to spectral approximations of functions.
Patera, A. T., Kopriva, D. A., Hussaini, M. Y.   +2 more
core  

Numerical analysis of stochastic SIR model by Legendre spectral collocation method

Advances in Mechanical Engineering, 2019
This article represents Legendre spectral collocation method based on Legendre polynomials to solve a stochastic Susceptible, infected, Recovered (SIR) model.
Sami Ullah Khan, Ishtiaq Ali
doaj   +1 more source

Significance of Convection and Internal Heat Generation on the Thermal Distribution of a Porous Dovetail Fin with Radiative Heat Transfer by Spectral Collocation Method. [PDF]

Micromachines (Basel), 2022
Sowmya G, Lashin MMA, Khan MI, Khan MI, Kumar RSV, Jagadeesha KC, Prasannakumara BC, Guedri K, Bafakeeh OT, Mohamed Tag-ElDin ES, Galal AM.   +10 more
europepmc   +1 more source