Results 121 to 130 of about 59,031 (278)

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Redundancy-free integrated optical convolver for optical neural networks based on arrayed waveguide grating

Nanophotonics
Optical neural networks (ONNs) have gained significant attention due to their potential for high-speed and energy-efficient computation in artificial intelligence.
Zhang Shiji, Zhou Haojun, Wu Bo, Jiang Xueyi, Gao Dingshan, Xu Jing, Dong Jianji   +6 more
doaj   +1 more source

Green Apple Detection Method Based on Multidimensional Feature Extraction Network Model and Transformer Module

Journal of Food Protection
To enhance the fast and accurate detection of pollution-free green apples for food safety, this paper uses the DETR network as a framework to propose a new method for pollution-free green apple detection based on a multidimensional feature extraction ...
Wei Ji, Kelong Zhai, Bo Xu, Jiawen Wu
doaj   +1 more source

Zeros of the Wigner Distribution and the Short-Time Fourier Transform

, 2018
We study the question under which conditions the zero set of a (cross-) Wigner distribution W (f, g) or a short-time Fourier transform is empty. This is the case when both f and g are generalized Gaussians, but we will construct less obvious examples ...
Gröchenig, Karlheinz, Jaming, Philippe, Malinnikova, Eugenia   +2 more
core  

Computing free convolutions via contour integrals

Random Matrices: Theory and Applications
This work proposes algorithms for computing additive and multiplicative free convolutions of two given probability measures. We consider probability measures with compact support whose free convolution results in a probability measure with a density function that exhibits a square-root decay at the boundary (for example, the semicircle distribution or
Alice Cortinovis, Lexing Ying
openaire   +3 more sources

Scalable Polyelectrolyte Complex‐Based Sorbent With Hourly Sorption−Desorption Cycles for Multicyclic Atmospheric Water Harvesting in Arid Environments

Advanced Functional Materials, EarlyView.
A polyelectrolyte complex‐based sorbent is produced by scalable, environmentally benign aqueous phase inversion. Its porous, LiCl‐ and GO‐integrated architecture enables hourly adsorption−desorption cycles at low relative humidity (RH < 30%). A large‐scale prototype achieves multicyclic, solar‐driven atmospheric water harvesting of 1.37 L kg−1 day−1 ...
Seung‐Hwan Oh, Incheol Heo, Won Cheol Yoo, Soo‐Hyung Choi   +3 more
wiley   +1 more source

BVGA-Net: Lightweight Network Coupling BiLoop Vector-Mixed Gradient Aggregation for Quayside Crane Driver State Detection Against Complex Cockpit Interference

IEEE Access
Driver state detection in port quayside cranes faces challenges from complex cockpit backgrounds and lightweight deployment needs. We proposed a lightweight detection network BVGA-Net based on an improved receptive-field attention mechanism and multi ...
Yong Zhang, Hengliang Ren, Jibo Pan, Lei Xian, Qianli Ma, Chunhao Han, Gao Liu, Xunbin Huang, Yang Liu, Yan Chen   +9 more
doaj   +1 more source

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Retinex-based low-light image enhancement with multi-channel feature optimization

Science Progress
Low-light conditions reduce brightness and contrast, obscure structural details, and amplify noise, which degrades visual quality and adversely affects downstream tasks, such as object detection and segmentation.
Zhiwen Wang, Yulong Qiao, Yan Cang
doaj   +1 more source

ASCDet: cross-space UAV object detection method guided by adaptive sparse convolution

International Journal of Digital Earth
UAV object detection, a critical aspect of remote sensing applications, faces challenges due to high object sparsity and complex backgrounds, leading to excessive computational demands.
Gui Cheng, Xubin Feng, Yan Tian, Meilin Xie, Chaoya Dang, Qing Ding, Zhenfeng Shao   +6 more
doaj   +1 more source