Results 121 to 130 of about 1,992,211 (291)

Dictionary learning based regularization in quantitative MRI: A nested alternating optimization framework

open access: yes
In this article we propose a novel regularization method for a class of nonlinear inverse problems that is inspired by an application in quantitative magnetic resonance imaging (MRI).
Dong, Guozhi   +2 more
core   +1 more source

BLLL-Based Distributed Alternating Optimization for Joint 3D UAV Positioning and Channel Allocation in Dense Urban Scenarios

open access: yesIEEE Access
In dense urban scenarios, Uncrewed Aerial Vehicles (UAVs) equipped with antennas can hover in the air to serve as temporary base stations, efficiently covering the mission area and providing high-quality wireless services to ground stations.
Yufei Ren   +4 more
doaj   +1 more source

Reservoir‐Driven Neuromorphic Computing Based on Composite Rare‐Earth/Transition Metal Oxide Memristor

open access: yesAdvanced Functional Materials, EarlyView.
A defect‐engineered Ag/Gd2O3:Nb2O5/Pt rare earth composite oxide memristor enables stable multilevel reservoir states through pulse driven conductance modulation. Experimentally measured device responses are incorporated into a device aware reservoir computing framework for CIFAR‐100 image classification, highlighting the potential of rare earth ...
Hammad Ghazanfar   +9 more
wiley   +1 more source

Kinetics‐Controlled Architecture of Binder‐Free Organic Electrodes for Enhanced Ion Transport

open access: yesAdvanced Functional Materials, EarlyView.
Pulse reverse electrodeposition controls nucleation and growth to create hierarchically porous Py‐derived oligomeric electrodes with enhanced ionic accessibility and reduced transport resistance. The resulting binder‐free architectures translate these transport advantages into practical sodium‐storage functionality.
Satendra Kumar   +1 more
wiley   +1 more source

Approximate low-rank factorization with structured factors

open access: yes, 2010
An approximate rank revealing factorization problem with structure constraints on the normalized factors is considered. Examples of structure, motivated by an application in microarray data analysis, are sparsity, nonnegativity, periodicity, and ...
Niranjan, Mahesan, Markovsky, Ivan
core   +1 more source

Physical Layer Security Communication for Active Dual-RIS Assisted NOMA Networks

open access: yesIEEE Open Journal of the Communications Society
This paper addresses the physical layer security problem in active dual reconfigurable intelligent surface (RIS)-assisted non-orthogonal multiple access (NOMA) networks, where the two RISs are interconnected via cascaded links.
Jie Wen   +4 more
doaj   +1 more source

Electrical Tuning of Ferrimagnetic Spin Alignment Angle and Compensation Temperature in Pt/IrMn3/CoGd Multilayers

open access: yesAdvanced Functional Materials, EarlyView.
Spin‐orbit torque controls the Néel vector of antiferromagnetic IrMn3, which selectively exchange‐couples with spins of Co only in the ferrimagnetic CoGd. This selective interfacial pinning induces the non‐collinear spiral spin configuration, leading to a non‐uniform distribution of local compensation temperature along the film thickness, and enabling ...
Won‐Chang Choi   +8 more
wiley   +1 more source

Alternating Regret for Online Convex Optimization

open access: yesCoRR
Motivated by alternating learning dynamics in two-player games, a recent work by Cevher et al.(2024) shows that $o(\sqrt{T})$ alternating regret is possible for any $T$-round adversarial Online Linear Optimization (OLO) problem, and left as an open question whether the same is true for general Online Convex Optimization (OCO).
Soumita Hait   +3 more
openaire   +4 more sources

Dynamic Role Allocation in Cooperative Secure UAV-ISAC Networks

open access: yesIEEE Open Journal of the Communications Society
This paper proposes a novel physical-layer security framework for multi-UAV Integrated Sensing and Communication (ISAC) networks operating in adversarial environments.
Mahmoud M. Selim   +3 more
doaj   +1 more source

Thermoresponsive Liquid Crystalline Polymer Coatings Programmed by Field‐Induced Topological Defects for Tunable Optical and Topographical Responses

open access: yesAdvanced Functional Materials, EarlyView.
Resonant standing waves generate large‐area lattices of liquid‐crystal topological defects that are permanently encoded into polymer coatings by photopolymerization. The preserved director architecture produces thermally reconfigurable surface topographies while maintaining programmable optical functionality, demonstrating a scalable strategy for ...
Jacques A. Peixoto   +6 more
wiley   +1 more source

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