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In this paper, we present a dense hybrid proposal modulation (DHPM) method for lane detection. Most existing methods perform sparse supervision on a subset of high-scoring proposals, while other proposals fail to obtain effective shape and…

计算机视觉与模式识别 · 计算机科学 2023-05-01 Yuejian Wu , Linqing Zhao , Jiwen Lu , Haibin Yan

We establish convergence rates for a fully discrete, multi-level, linear collocation method solving parametric elliptic PDEs on bounded polygonal domains with log-normal inputs. The method uses a finite set of function evaluations in the…

数值分析 · 数学 2026-03-30 Dinh Dũng

We propose a compressive spectral collocation method for the numerical approximation of Partial Differential Equations (PDEs). The approach is based on a spectral Sturm-Liouville approximation of the solution and on the collocation of the…

数值分析 · 数学 2018-10-18 Simone Brugiapaglia

Integral equation based numerical methods are directly applicable to homogeneous elliptic PDEs, and offer the ability to solve these with high accuracy and speed on complex domains. In this paper, extensions to problems with inhomogeneous…

数值分析 · 数学 2019-07-22 Fredrik Fryklund , Mary Catherine A. Kropinski , Anna-Karin Tornberg

Dirac $\delta-$ distributionally sourced differential equations emerge in many dynamical physical systems from machine learning, finance, neuroscience, and seismology to black hole perturbation theory. These systems lack exact analytical…

广义相对论与量子宇宙学 · 物理学 2024-11-22 Lidia J. Gomes Da Silva

The aim of this paper is to develop stable and accurate numerical schemes for boundary integral formulations of the heat equation with Dirichlet boundary conditions. The accuracy of Galerkin discretisations for the resulting boundary…

数值分析 · 数学 2018-05-01 Alexey Chernov , Anne Reinarz

Reduced basis methods are popular for approximately solving large and complex systems of differential equations. However, conventional reduced basis methods do not generally preserve conservation laws and symmetries of the full order model.…

数值分析 · 数学 2018-03-20 Babak Maboudi Afkham , Jan S. Hesthaven

This paper introduces a new approximation scheme for solving high-dimensional semilinear partial differential equations (PDEs) and backward stochastic differential equations (BSDEs). First, we decompose a target semilinear PDE (BSDE) into…

数值分析 · 数学 2022-02-09 Akihiko Takahashi , Yoshifumi Tsuchida , Toshihiro Yamada

Based on a new approximation method, namely pseudospectral method, a solution for the three order nonlinear ordinary differential laminar boundary layer Falkner-Skan equation has been obtained on the semi-infinite domain. The proposed…

数学物理 · 物理学 2010-08-24 K. Parand , A. R. Rezaei , S. M. Ghaderi

We design a new algorithm for solving parametric systems having finitely many complex solutions for generic values of the parameters. More precisely, let $f = (f_1, \ldots, f_m)\subset \mathbb{Q}[y][x]$ with $y = (y_1, \ldots, y_t)$ and $x…

符号计算 · 计算机科学 2021-12-22 Huu Phuoc Le , Mohab Safey El Din

Hermite reduction is a classical algorithmic tool in symbolic integration. It is used to decompose a given rational function as a sum of a function with simple poles and the derivative of another rational function. We extend Hermite…

符号计算 · 计算机科学 2023-06-12 Alin Bostan , Frédéric Chyzak , Pierre Lairez , Bruno Salvy

As an improvement of the Meshless Local Petrov-Galerkin (MLPG), the Direct Meshless Local Petrov-Galerkin (DMLPG) method is applied here to the numerical solution of transient heat conduction problem. The new technique is based on direct…

数值分析 · 数学 2013-04-09 Davoud Mirzaei , Robert Schaback

We propose a multi-moment method for one-dimensional hyperbolic equations with smooth coefficient and piecewise constant coefficient. The method is entirely based on the backward characteristic method and uses the solution and its…

数值分析 · 数学 2020-01-14 Kazufumi Ito , Tomoya Takeuchi

The work in this paper concerns the study of different approximations for one-dimensional one-phase Stefan-like problems with a space-dependent latent heat. It is considered two different problems, which differ from each other in their…

偏微分方程分析 · 数学 2020-07-22 Julieta Bollati , Domingo A. Tarzia

Recently, supervised hashing methods have attracted much attention since they can optimize retrieval speed and storage cost while preserving semantic information. Because hashing codes learning is NP-hard, many methods resort to some form…

机器学习 · 计算机科学 2017-12-05 Zihao Hu , Xiyi Luo , Hongtao Lu , Yong Yu

We describe a general approach for constructing a broad class of operators approximating high-dimensional curves based on geometric Hermite data. The geometric Hermite data consists of point samples and their associated tangent vectors of…

数值分析 · 数学 2022-03-08 Hofit Ben-Zion Vardi , Nira Dyn , Nir Sharon

Estimating 3D human pose from a single image is a challenging task. This work attempts to address the uncertainty of lifting the detected 2D joints to the 3D space by introducing an intermediate state-Part-Centric Heatmap Triplets…

计算机视觉与模式识别 · 计算机科学 2021-01-13 Kun Zhou , Xiaoguang Han , Nianjuan Jiang , Kui Jia , Jiangbo Lu

Due to its highly oscillating solution, the Helmholtz equation is numerically challenging to solve. To obtain a reasonable solution, a mesh size that is much smaller than the reciprocal of the wavenumber is typically required (known as the…

数值分析 · 数学 2023-02-21 Qiwei Feng , Bin Han , Michelle Michelle

We study cascade coupled systems, for which our prototypical example is a 1-d heat equation coupled with a 1-d wave equation. The heat component is controlled through one boundary and the information is transmitted through another one to…

最优化与控制 · 数学 2026-03-11 Lucas Davron , Pierre Lissy , Swann Marx

The first purpose of this paper is to provide a rigorous proof for the nonconvergence of $h$-refinement in $hp$-approximation by the PSWFs, a surprising convergence property that was first observed by Boyd et al [J. Sci. Comput., 2013]. The…

数值分析 · 数学 2015-06-17 Li-Lian Wang , Jing Zhang , Zhimin Zhang