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Inverse source problems are central to many applications in acoustics, geophysics, non-destructive testing, and more. Traditional imaging methods suffer from the resolution limit, preventing distinction of sources separated by less than the…

机器学习 · 计算机科学 2022-08-11 Adar Kahana , Symeon Papadimitropoulos , Eli Turkel , Dmitry Batenkov

We present a simultaneous localization and mapping (SLAM) algorithm that is based on radio signals and the association of specular multipath components (MPCs) with geometric features. Especially in indoor scenarios, robust localization from…

信息论 · 计算机科学 2019-08-30 Erik Leitinger , Florian Meyer , Franz Hlawatsch , Klaus Witrisal , Fredrik Tufvesson , Moe Z. Win

Large scale datasets created from crowdsourced labels or openly available data have become crucial to provide training data for large scale learning algorithms. While these datasets are easier to acquire, the data are frequently noisy and…

图像与视频处理 · 电气工程与系统科学 2022-01-03 Rodrigo Caye Daudt , Bertrand Le Saux , Alexandre Boulch , Yann Gousseau

With the rising demands for robust structural health monitoring procedures for aerospace structures, the scope of intelligent algorithms and learning techniques is expanding. Supervised algorithms have shown promising results in the field…

信号处理 · 电气工程与系统科学 2023-08-11 Mahindra Rautela , Amin Maghareh , Shirley Dyke , S. Gopalakrishnan

We study the propagation of small amplitude waves superimposed on a large static deformation in a nonlinear viscoelastic material of differential type. We use bulk waves and surface waves to address the questions of dissipation and of…

生物物理 · 物理学 2008-12-09 Michel Destrade , Ray W. Ogden , Giuseppe Saccomandi

The scoliosis progression in adolescents requires close monitoring to timely take treatment measures. Ultrasound imaging is a radiation-free and low-cost alternative in scoliosis assessment to X-rays, which are typically used in clinical…

图像与视频处理 · 电气工程与系统科学 2021-09-14 Maria Victorova , Michael Ka-Shing Lee , David Navarro-Alarcon , Yongping Zheng

A central challenge in Gravitational Wave Astronomy is identifying weak signals in the presence of non-stationary and non-Gaussian noise. The separation of gravitational wave signals from noise requires good models for both. When accurate…

广义相对论与量子宇宙学 · 物理学 2015-06-17 Neil J. Cornish , Tyson B. Littenberg

The investigation into the scattering of plane waves by a periodic array of parallel cylinders utilizes the method of cylindrical wave decomposition, thereby reducing the problem complexity to a series of linear algebraic equations. This…

光学 · 物理学 2024-06-21 A. S. Bereza , A. E. Chernyavsky , S. V. Perminov , D. A. Shapiro

This paper presents a new Bayesian spectral unmixing algorithm to analyse remote scenes sensed via sparse multispectral Lidar measurements. To a first approximation, in the presence of a target, each Lidar waveform consists of a main peak,…

Monitoring the integrity of elastic structures using ultrasonic waves requires the efficient identification of material parameters from measured surface displacements. The displacement field is governed by Cauchy's equation of motion, i.e.,…

数值分析 · 数学 2026-05-20 Benedikt Klein , Mario Ohlberger , Thomas Schuster

Traumatic brain injury studies on the living human brain are experimentally infeasible. We present a simulation approach that models ultrasound propagation in the human brain while it is moving due to the complex shear shock wave…

Spatially localized deformation components are very useful for shape analysis and synthesis in 3D geometry processing. Several methods have recently been developed, with an aim to extract intuitive and interpretable deformation components.…

图形学 · 计算机科学 2017-12-19 Qingyang Tan , Lin Gao , Yu-Kun Lai , Jie Yang , Shihong Xia

We introduce a direct, linear sampling approach to imaging in an acoustic waveguide with sound hard walls. The waveguide terminates at one end and has unknown geometry due to compactly supported wall deformations. The goal of imaging is to…

偏微分方程分析 · 数学 2019-06-26 Liliana Borcea , Fioralba Cakoni , Shixu Meng

We report the design and characterization of a self-assembled, locally resonant acoustic metamaterial for Lamb waves, composed of a monolayer of $1.02$ $\mu$m polystyrene microspheres adhered to a $1.3$ $\mu$m thick free-standing silicon…

介观与纳米尺度物理 · 物理学 2015-09-02 Amey Khanolkar , Samuel Wallen , Maroun Abi Ghanem , Jennifer Jenks , Nicolas Vogel , Nicholas Boechler

We consider the Bayesian detection statistic for a targeted search for continuous gravitational waves, known as the $\mathcal{B}$-statistic. This is a Bayes factor between signal and noise hypotheses, produced by marginalizing over the four…

广义相对论与量子宇宙学 · 物理学 2018-12-19 John J. Bero , John T. Whelan

Ultrasound reflection tomography is widely used to image large complex specimens that are only accessible from a single side, such as well systems and nuclear power plant containment walls. Typical methods for inverting the measurement rely…

图像与视频处理 · 电气工程与系统科学 2018-10-01 Hani Almansouri , S. V. Venkatakrishnan , Gregery T. Buzzard , Charles A. Bouman , Hector Santos-Villalobos

This paper proposes a high-accuracy radio map construction method tailored for environments where location information is affected by bursty errors. Radio maps are an effective tool for visualizing wireless environments. Although extensive…

信号处理 · 电气工程与系统科学 2025-09-25 Koki Kanzaki , Koya Sato

Calibration or parameter identification is used with computational mechanics models related to observed data of the modeled process to find model parameters such that good similarity between model prediction and observation is achieved. We…

计算工程、金融与科学 · 计算机科学 2022-12-26 Harald Willmann , Jonas Nitzler , Sebastian Brandstaeter , Wolfgang A. Wall

Deep learning-based segmentation methods are widely utilized for detecting lesions in ultrasound images. Throughout the imaging procedure, the attenuation and scattering of ultrasound waves cause contour blurring and the formation of…

图像与视频处理 · 电气工程与系统科学 2024-11-22 Ruiguo Yu , Yiyang Zhang , Yuan Tian , Zhiqiang Liu , Xuewei Li , Jie Gao

In underwater acoustics, shallow water environments act as modal dispersive waveguides when considering low-frequency sources. In this context, propagating signals can be described as a sum of few modal components, each of them propagating…

信号处理 · 电气工程与系统科学 2020-12-01 Clément Dorffer , Thomas Paviet-Salomon , Gilles Le Chenadec , Angélique Drémeau