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Gradient-based adversarial attacks are widely used to evaluate the robustness of 3D point cloud classifiers, yet they often rely on uniform update rules that neglect point-wise heterogeneity, leading to perceptible perturbations. We propose…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Jun Chen , Xinke Li , Mingyue Xu , Chongshou Li , Truiani Li

Chemical heterogeneity of solid surfaces disrupts the adsorption of surfactants from the bulk liquid. While its presence can hinder the performance of some formulations, bespoke chemical patterning could potentially facilitate controlled…

Area-selective atomic layer deposition is a key technology for modern microelectronics as it eliminates alignment errors inherent to conventional approaches by enabling material deposition only in specific areas. Typically, the selectivity…

The design and implementation of low-profile antennas has been analyzed in past decades from different perspectives while the purpose is to have a small size in the device, and an adequate electromagnetic behavior. This work pursues a…

Signal Processing · Electrical Eng. & Systems 2020-11-25 Enrique Lizarraga , Walter Herrera

Deep models are state-of-the-art for many computer vision tasks including image classification and object detection. However, it has been shown that deep models are vulnerable to adversarial examples. We highlight how one-hot encoding…

Computer Vision and Pattern Recognition · Computer Science 2020-01-16 Donghyun Kim , Sarah Adel Bargal , Jianming Zhang , Stan Sclaroff

A semiconductor-based terahertz-detector strategy, exploiting a bound-to-bound-to-continuum architecture, is presented and investigated. In particular, a ladder of equidistant energy levels is employed, whose step is tuned to the desired…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 F. Castellano , R. C. Iotti , F. Rossi

To this day, achieving broadband low-frequency sound absorption remains a challenge even with the possibilities promised by the advent of metamaterials and metasurfaces, especially when size and structural restrictions exist. Solving this…

Object detection plays an important role in various visual applications. However, the precision and speed of detector are usually contradictory. One main reason for fast detectors' precision reduction is that small objects are hard to be…

Computer Vision and Pattern Recognition · Computer Science 2019-05-23 Siyang Sun , Yingjie Yin , Xingang Wang , De Xu , Yuan Zhao , Haifeng Shen

A quantitative model of the mobility of functionalized particles at the interface is pivotal to understanding important systems in biology and nanotechnology. In this work, we investigate the emerging dynamics of particles anchored through…

Soft Condensed Matter · Physics 2024-06-19 Janna Lowensohn , Laurie Stevens , Daniel Goldstein , Bortolo Matteo Mognetti

Metasurfaces have enabled precise electromagnetic wave manipulation with strong potential to obtain unprecedented functionalities and multifunctional behavior in flat optical devices. These advantages in precision and functionality come at…

For high throughput applications, turbo-like iterative decoders are implemented with parallel architectures. However, to be efficient parallel architectures require to avoid collision accesses i.e. concurrent read/write accesses should not…

Hardware Architecture · Computer Science 2010-02-23 Cyrille Chavet , Philippe Coussy , Eric Martin , Pascal Urard

Distributed Manipulator Systems, composed of arrays of robotic actuators necessitate dense actuator arrays to effectively manipulate small objects. This paper presents a system composed of modular 3-DoF robotic tiles interconnected by a…

Robotics · Computer Science 2026-02-24 Bailey Dacre , Rodrigo Moreno , Jørn Lambertsen , Kasper Stoy , Andrés Faíña

The multi-agent spatial coverage control problem encompasses a broad research domain, dealing with both dynamic and static deployment strategies, discrete-task assignments, and spatial distribution-matching deployment. Coverage control may…

Robotics · Computer Science 2024-07-22 Solmaz Kia , Sonia Martinez

This paper studies a distributed policy gradient in collaborative multi-agent reinforcement learning (MARL), where agents over a communication network aim to find the optimal policy to maximize the average of all agents' local returns. Due…

Multiagent Systems · Computer Science 2022-12-06 Xiaoxiao Zhao , Jinlong Lei , Li Li , Jie Chen

Attackers can deliberately perturb classifiers' input with subtle noise, altering final predictions. Among proposed countermeasures, adversarial purification employs generative networks to preprocess input images, filtering out adversarial…

Computer Vision and Pattern Recognition · Computer Science 2024-12-05 Dario Serez , Marco Cristani , Alessio Del Bue , Vittorio Murino , Pietro Morerio

The design of low-dimensional organic-inorganic interfaces for the next generation of opto-electronic applications requires an in-depth understanding of the microscopic mechanisms ruling electronic interactions in these systems. In this…

Adsorption at an attractive surface in a system with particles self-assembling into small clusters is studied by Molecular dynamics (MD) simulation. We assume Lennard-Jones plus repulsive Yukawa tail interactions, and focus on small…

Statistical Mechanics · Physics 2019-07-01 Marek Litniewski , Alina Ciach

A nearly omni-directional THz absorber for both transverse electric (TE) and transverse magnetic (TM) polarizations is proposed. Through the excitation of magnetic polariton in a metal-dielectric layer, the incident light is perfectly…

Optics · Physics 2009-06-12 Yuqian Ye , Yi Jin , Sailing He

An apporach for the sensing of small amounts of chemical and biochemical material is presented. A frequency selective surface (FSS) made from asymmetric split ring resonators (aDSR) is excited with free space radiation. Due to interference…

Applied Physics · Physics 2021-04-13 Christian Debus , Peter Haring Bolívar

As an example of thin composite layers we consider single and double grids of periodically arranged interacting wires loaded with a certain distributed reactive impedance. Currents induced to the wires by a normally incident plane wave are…

Classical Physics · Physics 2009-11-13 Pekka Ikonen , Elena Saenz , Ramon Gonzalo , Constantin Simovski , Sergei Tretyakov