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We present a novel hybrid numerical-asymptotic boundary element method for high frequency acoustic and electromagnetic scattering by penetrable (dielectric) convex polygons. Our method is based on a standard reformulation of the associated…

数值分析 · 数学 2017-12-15 Samuel P. Groth , David P. Hewett , Stephen Langdon

This work examines the relevance of the one-dimensional models used to study the influx and the cumulative uptake of nutrient by roots. The physical models studied are the fixed boundary model (Barber and Cushman 1981) and an improved…

组织与器官 · 定量生物学 2015-01-12 Juan C. Reginato , Jorge L. Blengino , Domingo A. Tarzia

Accurate 6D object pose estimation is vital for robotics, augmented reality, and scene understanding. For seen objects, high accuracy is often attainable via per-object fine-tuning but generalizing to unseen objects remains a challenge. To…

计算机视觉与模式识别 · 计算机科学 2025-11-21 Sajjad Pakdamansavoji , Yintao Ma , Amir Rasouli , Tongtong Cao

The surface code is a powerful quantum error correcting code that can be defined on a 2-D square lattice of qubits with only nearest neighbor interactions. Syndrome and data qubits form a checkerboard pattern. Information about errors is…

量子物理 · 物理学 2010-11-24 Austin G. Fowler , David S. Wang , Lloyd C. L. Hollenberg

X-ray imaging can be efficiently used for high-throughput in-line inspection of industrial products. However, designing a system that satisfies industrial requirements and achieves high accuracy is a challenging problem. The effect of many…

图像与视频处理 · 电气工程与系统科学 2024-01-31 Vladyslav Andriiashen , Robert van Liere , Tristan van Leeuwen , K. Joost Batenburg

We investigate methods for determining if a planar surface contains geometric deviations (e.g., protrusions, objects, divots, or cliffs) using only an instantaneous measurement from a miniature optical time-of-flight sensor. The key to our…

机器人学 · 计算机科学 2024-08-08 Carter Sifferman , William Sun , Mohit Gupta , Michael Gleicher

A method for detecting and approximating fault lines or surfaces, respectively, or decision curves in two and three dimensions with guaranteed accuracy is presented. Reformulated as a classification problem, our method starts from a set of…

数值分析 · 数学 2023-02-17 Matthias Grajewski , Andreas Kleefeld

In this paper, we define new unfitted finite element methods for numerically approximating the solution of surface partial differential equations using bulk finite elements. The key idea is that the $n$-dimensional hypersurface, $\Gamma…

数值分析 · 数学 2014-03-21 Klaus Deckelnick , Charles M. Elliott , Thomas Ranner

We present a new method to estimate shear measurement bias in image simulations that significantly improves the precision with respect to current techniques. Our method is based on measuring the shear response for individual images. We…

宇宙学与河外天体物理 · 物理学 2018-12-19 Arnau Pujol , Martin Kilbinger , Florent Sureau , Jerome Bobin

Outlier feature matches and loop-closures that survived front-end data association can lead to catastrophic failures in the back-end optimization of large-scale point cloud based 3D reconstruction. To alleviate this problem, we propose a…

计算机视觉与模式识别 · 计算机科学 2019-05-24 Ziquan Lan , Zi Jian Yew , Gim Hee Lee

A novel artificial neural network method is proposed for solving Cauchy inverse problems. It allows multiple hidden layers with arbitrary width and depth, which theoretically yields better approximations to the inverse problems. In this…

数值分析 · 数学 2020-01-07 Yixin Li , Xianliang Hu

Tomographic image reconstruction is well understood if the specimen being studied is stationary during data acquisition. However, if this specimen changes during the measuring process, standard reconstruction techniques can lead to severe…

偏微分方程分析 · 数学 2022-04-13 B. N. Hahn , M. -L. Kienle-Garrido , C. Klingenberg , S. Warnecke

The Euler-Poisson system is a fundamental two-fluid model to describe the dynamics of the plasma consisting of compressible electrons and a uniform ion background. In the 3D case Guo first constructed a global smooth irrotational solution…

数学物理 · 物理学 2013-11-25 Dong Li , Yifei Wu

We consider the inverse shape and parameter problem for detecting corrosion from partial boundary measurements. This problem models the non-destructive testing for a partially buried object from electrostatic measurements on the accessible…

偏微分方程分析 · 数学 2024-09-05 Isaac Harris , Andreas Kleefeld , Heejin Lee

Despite diffusion models' superior capabilities in modeling complex distributions, there are still non-trivial distributional discrepancies between generated and ground-truth images, which has resulted in several notable problems in image…

计算机视觉与模式识别 · 计算机科学 2024-10-08 Yujian Liu , Yang Zhang , Tommi Jaakkola , Shiyu Chang

We consider the Cauchy problem for the 1D generalized Schr\"odinger equation on the whole axis. To solve it, any order finite element in space and the Crank-Nicolson in time method with the discrete transparent boundary conditions (TBCs)…

数值分析 · 数学 2026-01-05 A. Zlotnik , I. Zlotnik

We are interested in the classical ill-posed Cauchy problem for the Laplace equation. One method to approximate the solution associated with compatible data consists in considering a family of regularized well-posed problems depending on a…

偏微分方程分析 · 数学 2019-06-21 Laurent Bourgeois , Lucas Chesnel

We introduce an approach for calculating non-universal properties of rough surfaces. The technique uses concepts of distinct surface-configuration classes, defined by the surface growth rule. The key idea is a mapping between discrete…

统计力学 · 物理学 2007-05-23 A. Kolakowska , M. A. Novotny

Additive manufacturing builds physical objects by accumulating layers upon layers of solidified material. This process is typically done with horizontal planar layers. However, fused filament printers have the capability to extrude material…

图形学 · 计算机科学 2024-06-07 Emilio Ottonello , Pierre-Alexandre Hugron , Alberto Parmiggiani , Sylvain Lefebvre

This paper presents a CAD-based approach for automated surface defect detection. We leverage the a-priori knowledge embedded in a CAD model and integrate it with point cloud data acquired from commercially available stereo and depth…

计算机视觉与模式识别 · 计算机科学 2025-01-31 Matteo Dalle Vedove , Matteo Bonetto , Edoardo Lamon , Luigi Palopoli , Matteo Saveriano , Daniele Fontanelli