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New estimators for the mean and the covariance function for partially observed functional data are proposed using a detour via the fundamental theorem of calculus. The new estimators allow for a consistent estimation of the mean and…

统计方法学 · 统计学 2018-08-01 Dominik Liebl , Stefan Rameseder

Statistical decision problems lie at the heart of statistical machine learning. The simplest problems are binary and multiclass classification and class probability estimation. Central to their definition is the choice of loss function,…

机器学习 · 计算机科学 2023-08-21 Robert C. Williamson , Zac Cranko

Error estimation is given for a regularized Shannon's sampling formulae, which was found to be accurate and robust for numerically solving partial differential equations.

数值分析 · 数学 2025-10-20 Liwen Qian , G. W. Wei

We consider linear instability of solitary waves of several classes of dispersive long wave models. They include generalizations of KDV, BBM, regularized Boussinesq equations, with general dispersive operators and nonlinear terms. We obtain…

偏微分方程分析 · 数学 2008-02-04 Zhiwu Lin

By choosing an electron gas resting instead of drifting in the laboratory coordinate system as the initial state, the first order perturbation calculation of the previous paper (Phys. Stat. Sol. (b) 198, 785(1996)) is revised and extended…

统计力学 · 物理学 2009-10-30 Hang-Sheng Wu , Xian-Xiang Huang , Qi-Ming Weng

The problem of estimation error of Expected Shortfall is analyzed, with a view of its introduction as a global regulatory risk measure.

风险管理 · 定量金融 2014-02-25 Imre Kondor

We develop an unsupervised machine learning algorithm for the automated discovery and identification of traveling waves in spatio-temporal systems governed by partial differential equations (PDEs). Our method uses sparse regression and…

计算物理 · 物理学 2020-05-20 Ariana Mendible , Steven L. Brunton , Aleksandr Y. Aravkin , Wes Lowrie , J. Nathan Kutz

In this paper we introduce and investigate a new kind of functional (including ordinary and evolutionary partial) differential equations. The main goal of this paper is to explore our new philosophy by some examples on functional ODEs and…

偏微分方程分析 · 数学 2014-02-14 De-Xing Kong , Cheng Zhang

Motivated by applications to stochastic programming, we introduce and study the expected-integral functionals, which are mappings given in an integral form depending on two variables, the first a finite dimensional decision vector and the…

最优化与控制 · 数学 2021-06-15 Boris S. Mordukhovich , Pedro Pérez-Aros

Numerical solutions to hyperbolic partial differential equations, involving wave propagations in one direction, are subject to several specific errors, such as numerical dispersion, dissipation or aliasing. In multi-dimensions, where the…

数值分析 · 数学 2019-02-13 Adrian Sescu

For some estimations and predictions, we solve minimization problems with asymmetric loss functions. Usually, we estimate the coefficient of regression for these problems. In this paper, we do not make such the estimation, but rather give a…

统计理论 · 数学 2023-03-03 Naoya Yamaguchi , Yuka Yamaguchi , Ryuei Nishii

In this paper, we establish a partial order principle, which is useful to deriving vector Ekeland variational principle (denoted by EVP). By using the partial order principle and extending Gerstewitz's functions, we obtain a vector EVP for…

泛函分析 · 数学 2016-11-11 Jing-Hui Qiu

This article describes an approximation technique based on fractional order Bernstein wavelets for the numerical simulations of fractional oscillation equations under variable order, and the fractional order Bernstein wavelets are derived…

数值分析 · 数学 2023-06-05 Ashish Rayal , Bhagawati Prasad Joshi , Mukesh Pandey , Delfim F. M. Torres

I discuss the effects of measurement error on regression and density estimation. I review the statistical methods that have been developed to correct for measurement error that are most popular in astronomical data analysis, discussing…

天体物理仪器与方法 · 物理学 2011-12-09 Brandon C. Kelly

This review paper is intended to give a useful guide for those who want to apply discrete wavelets in their practice. The notion of wavelets and their use in practical computing and various applications are briefly described, but rigorous…

高能物理 - 唯象学 · 物理学 2025-10-20 I. M. Dremin , O. V. Ivanov , V. A. Nechitailo

In this paper a spline based integral approximation is utilized to propose a sequence of approximations to the error function that converge at a significantly faster manner than the default Taylor series. The approximations can be improved…

综合数学 · 数学 2022-07-27 Roy M. Howard

The cutoff method, which cuts off the values of a function less than a given number, is studied for the numerical computation of nonnegative solutions of parabolic partial differential equations. A convergence analysis is given for a broad…

数值分析 · 数学 2015-06-05 Changna Lu , Weizhang Huang , Erik S. Van Vleck

In this paper, we study the endpoint reversed Strichartz estimates along general time-like trajectories for wave equations in $\mathbb{R}^{3}$. We also discuss some applications of the reversed Strichartz estimates and the structure of wave…

偏微分方程分析 · 数学 2019-09-13 Gong Chen

Inferring the parameters of ordinary differential equations (ODEs) from noisy observations is an important problem in many scientific fields. Currently, most parameter estimation methods that bypass numerical integration tend to rely on…

统计方法学 · 统计学 2023-10-25 Mingwei Xu , Samuel W. K. Wong , Peijun Sang

In this paper, a posteriori error estimates of functional type for a stationary diffusion problem with nonsymmetric coefficients are derived. The estimate is guaranteed and does not depend on any particular numerical method. An algorithm…

数值分析 · 数学 2014-11-24 Olli Mali