Results 71 to 80 of about 3,234,558 (306)

Systematic Review of Geometrical Approaches and Analytical Integration for Chen’s System

Mathematics, 2020
The main goal of this paper is to present an analytical integration in connection with the geometrical frame given by the Hamilton–Poisson formulation of a specific case of Chen’s system. In this special case we construct an analytic approximate solution
Remus-Daniel Ene, Camelia Pop, Camelia Petrişor   +2 more
doaj   +1 more source

An asymptotic expansion of a sequence of integrals

Applied Mathematics Letters, 2011
The author generalizes \textit{E. Paltanea}'s result [``A representation of a sequence of integrals'', Gaz. Mat. Ser. B 11, 419--421 (2003)] by obtaining the complete asymptotic expansion of the sequence \(\int^1 f(x^n)dx\), on \([0,1]\) and \(n\geq1\).
openaire   +3 more sources

Estimating Semiparametric Panel Data Models by Marginal Integration [PDF]

We propose a new methodology for estimating semiparametric panel data models, with a primary focus on the nonparametric component. We eliminate individual effects using first differencing transformation and estimate the unknown function by marginal ...
Qian, Junhui, Wang, Le
core  

Learning Work Function via Implicit Reasoning on Electrostatic Potential Landscapes

Advanced Science, EarlyView.
StructPot‐CLR establishes a cross‐modal contrastive learning framework that aligns the crystal structures of 2D materials with plane‐averaged electrostatic potential landscapes for physically informed work‐function prediction. The model achieves an MAE of 0.265 eV and an R2 of 0.902 on the held‐out test set while accurately preserving key morphological
Haoyu Wan, Yue Wu, Tianhao Su, Deng Pan
wiley   +1 more source

Axis-Symmetric Problem of Elasticity Theory for Radial-Nonhomogeneous Transversal-Isotropic Sphere of Small Thickness with Mixed Boundary Conditions on the Side Surface

Механика машин, механизмов и материалов, 2013
The 3-dimensional strained-deformed state of radial-nonhomogeneous transversal-isotropic spheric shell is investigated by the method of asymptotic integration of elasticity theory equations. There built nonhomogeneous and homogeneous solutions. There are
T.B. Mamedova
doaj  

Estimation and Testing for Varying Coefficients in Additive Models with Marginal Integration [PDF]

We propose marginal integration estimation and testing methods for the coefficients of varying coefficient multivariate regression model. Asymptotic distribution theory is developed for the estimation method which enjoys the same rate of convergence as ...
Byeong U. Park, Wolfgang Härdle, Lijian Yang, Lan Xue   +3 more
core  

Topology‐Enabled Finite‐Band Absorption Framework Based on a Bioinspired Nested Dual‐Loop Architecture

Advanced Science, EarlyView.
A nuclear‐pore‐inspired nested dual‐loop architecture redistributes electromagnetic energy through coupled transport, confinement, and dissipation pathways. Integrated with Co/Fe3O4 dual‐magnetic composites and topology optimization, the 11‐mm‐thick absorber delivers continuous 2–40 GHz attenuation, raises finite‐band structural utilization to 82%, and
Shaokang Liu, Weicheng Liao, Pinchen Luo, Mengchen Jin, Tangming Yan, Xing Zhao, Qingshan Wang   +6 more
wiley   +1 more source

The asymptotic structure of cosmological integrals

SciPost Physics
We provide a general analysis of the asymptotic behaviour of perturbative contributions to observables in arbitrary power-law FRW cosmologies, indistinctly the Bunch-Davies wavefunction of the universe and cosmological correlators. We consider a large class of scalar toy models, including conformally-coupled and massless scalars in arbitrary dimensions,
Paolo Benincasa, Francisco Vazao
openaire   +3 more sources

Inequalities and asymptotics for some moment integrals [PDF]

Journal of Inequalities and Applications, 2017
For $α>β-1>0$, we obtain two sided inequalities for the moment integral $I(α,β)= \int_{\mathbb{R}} |x|^{-β}|\sin x|^αdx$. These are then used to give the exact asymptotic behavior of the integral as $α\to \infty$. The case $I(α,α)$ corresponds to the asymptotics of Ball's inequality, and $I(α,[α]-1)$ corresponds to a kind of novel "oscillatory ...
openaire   +5 more sources

Asymptotic null distributions of stationarity and nonstationarity [PDF]

The purpose of this paper is to investigate the asymptotic null distribution of stationarity and nonstationarity tests when the distribution of the error term belongs to the normal domain of attraction of a stable law in any finite sample but the error ...
Nunzio Cappuccio, Diego Lubian
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