Results 51 to 60 of about 1,730 (224)
A spectral method based on the second kind Chebyshev polynomials for solving a class of fractional optimal control problems [PDF]
Sahand Communications in Mathematical Analysis, 2016 In this paper, we consider the second-kind Chebyshev polynomials (SKCPs) for the numerical solution of the fractional optimal control problems (FOCPs). Firstly, an introduction of the fractional calculus and properties of the shifted SKCPs are given and ...
Somayeh Nemati
doaj
On certain optimal quadrature formulas
Journal of Research of the National Bureau of Standards, Section B: Mathematical Sciences, 1971 IS any Npoint quadrature formula, and E(l(f) =/(f) -Q(f) where /(f) is the integral which Q is approximating, we shall denote by "cr(EQ)" the "RMS" average of Ell with respect to Sarma's measure. Sarma calls a formula Q.I' "completely optimal" if cr(EC1s) :s; cr(ECl ~\,) for every N·point formula Q~; and he calls it "optimal in the weights" if cr(EClN )
openaire +2 more sources
AI‐enabled bumpless transfer control strategy for legged robot with hybrid energy storage system
CAAI Transactions on Intelligence Technology, EarlyView.Abstract Designing Hybrid energy storage system (HESS) for a legged robot is significant to improve the motion performance and energy efficiency of the robot. However, switching between the driving mode and regenerative braking mode in the HESS may generate a torque bump, which has brought significant challenges to the stability of the robot locomotion.
Zhiwu Huang +6 more
wiley +1 more source
Preemptive Entry and Technology Diffusion: The Market for Drive‐In Theaters
The RAND Journal of Economics, EarlyView.ABSTRACT This article studies entry preemption in new industries. We first test a key prediction of dynamic entry games: Entry preemption is most relevant in intermediate‐sized markets, where firms face highest uncertainty about future entry. Using US drive‐in theater market (1945–1957) data, we find robust evidence for this non‐monotonic relationship ...
Ricard Gil +3 more
wiley +1 more source
Optimization of approximate integrals of rapidly oscillating functions in the Hilbert space
Results in Applied MathematicsIn this work, we construct an optimal quadrature formula in the sense of Sard based on a functional approach for numerical calculation of integrals of rapidly oscillating functions. To solve this problem, we will use Sobolev’s method.To do this, we first
Abdullo Hayotov +2 more
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Asymptotic standard errors for reliability coefficients in item response theory
British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract In a recent review, Liu et al. (Psychological Methods, 2025b) classified reliability coefficients into two types: classical test theory (CTT) reliability and proportional reduction in mean squared error (PRMSE). This article focuses on quantifying the sampling variability of these coefficients under item response theory (IRT) models.
Youjin Sung, Yang Liu
wiley +1 more source
An analysis of Ermakov-Zolotukhin quadrature using kernels
, 2021 International audienceWe study a quadrature, proposed by Ermakov and Zolotukhin in the sixties, through the lens of kernel methods. The nodes of this quadrature rule follow the distribution of a determinantal point process, while the weights are defined ...
Belhadji, Ayoub
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Asymptotically optimal definite quadrature formulae of 4th order
Journal of Computational and Applied Mathematics, 2017 26 pages, 4 figures, 4 ...
Ana Avdzhieva, Geno P. Nikolov
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British Journal of Mathematical and Statistical Psychology, EarlyView.Abstract Although full‐information maximum likelihood (FIML) estimation is widely used for diagnostic classification models (DCMs), its computational efficiency deteriorates sharply in high‐dimensional settings. This scalability challenge is increasingly critical as DCMs are applied to large‐scale assessments, psychological testing and longitudinal ...
Minho Lee, Yon Soo Suh
wiley +1 more source
Polynomial chaos to efficiently compute the annual energy production in wind farm layout optimization [PDF]
Wind Energy Science, 2019 In this paper, we develop computationally efficient techniques to calculate statistics used in wind farm optimization with the goal of enabling the use of higher-fidelity models and larger wind farm optimization problems.
A. S. Padrón +4 more
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