Results 51 to 60 of about 1,591 (287)
Annals of Geophysics, 2016 The article describes an implementation of the negative log-likelihood function in the determination of uncorrelated noise standard deviation together with the parameters of spherical signal covariance model in least squares collocation (LSC) of gravity ...
Wojciech Jarmołowski
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Least-squares collocation for linear higher-index differential–algebraic equations
, 2017 Differential–algebraic equations with higher index give rise to essentially ill-posed problems. Therefore, their numerical approximation requires special care.
Hanke, Michael +9 more
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Deep Underground Science and Engineering, EarlyView.In this work, we propose an improved particle swarm optimization (PSO) algorithm and develop an improved PSO‐relevance vector machine (RVM) model as a substitute for traditional true‐triaxial testing. The model's high prediction accuracy was validated through comparisons with two other machine learning methods and five three‐dimensional Hoek–Brown type
Qi Zhang +4 more
wiley +1 more source
Fraternal Twins: Syntheses and Crystal Structures of Yb11O2(OH)[AsO3]8[As2O5] and Lu6O[AsO3]4[As2O5]
European Journal of Inorganic Chemistry, EarlyView.The complex triclinic structure of Yb11O2(OH)[AsO3]8[As2O5] crystallizes in P1 (a = 843.81(6), b = 841.32(6), c = 1236.40(8) pm, α = 76.759(2), β = 71.726(2), γ = 85.347(2)°; Z = 1). The triclinic Lu6O[AsO3]4[As2O5] (P1¯$\overline{1}$; a = 836.72(6), b = 849.45(6), c = 1344.51(9) pm, α = 81.078(2), β = 85.289(2), γ = 86.034(2)°; Z = 2) can also be ...
Ralf J. C. Locke +2 more
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Moving Least Squares Method for a One-Dimensional Parabolic Inverse Problem
Abstract and Applied Analysis, 2014 This paper investigates the numerical solution of a class of one-dimensional inverse parabolic problems using the moving least squares approximation; the inverse problem is the determination of an unknown source term depending on time.
Baiyu Wang
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Numerical Implementation of Meshless Methods for Beam Problems
Archives of Civil Engineering, 2012 For solving a partial different equation by a numerical method, a possible alternative may be either to use a mesh method or a meshless method. A flexible computational procedure for solving 1D linear elastic beam problems is presented that currently ...
Rosca V. E., Leitāo V. M. A.
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, 2022 The present paper continues our investigation of an implementation of a least-squares collocation method for higher-index differential-algebraic equations.
Hanke, Michael,
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European Journal of Organic Chemistry, EarlyView.Chiral tri‐ and pentahydroxy spirocyclopentane‐indolizidines were synthesized using lithium diisopropylamide “LDA” promoted diallylation and tetrahydrofuran “THF” ring‐opening in a one‐pot procedure as a key step. The sequence leading to the targeted hydroxy‐spiroindolizidines was achieved by cis‐dihydroxylation followed by reduction of the enamine and
Paula Fraňová +6 more
wiley +1 more source
Improving Daily Precipitation Estimates by Merging Satellite and Reanalysis Data in Northeast China
Remote SensingPrecipitation plays a key control in the water, energy, and carbon cycles, and it is also an important driving force for land surface modeling. This study provides an optimal least squares merging approach to merge precipitation data sets from multiple ...
Gaohong Yin +3 more
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Terrestrial, Atmospheric and Oceanic Sciences, 2010 We investigated the Fourier transform-based downward continuation (DWC) of airborne gravity anomalies around Taiwan assisted by topographic information. The topographic data are from the latest collections of elevations and ocean depths.
Yu-Shen Hsiao Cheinway Hwang
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