Results 21 to 30 of about 7,112,275 (155)

A new interpretation of multifrequency/multipolarization radar signatures of the Gulf Stream front

, 1999
Radar signatures which are observed on SIR-C/X-SAR multifrequency/multipolarization synthetic aperture radar images of the Gulf Stream off the U.S. east coast are compared with results of simulations with a numerical radar imaging model. Based on in situ
Ufermann, S., Romeiser, R.
core   +2 more sources

A simulation of the single scan accuracy of a two-dimensional pulsed surveillance radar [PDF]

, 1991
Bibliography: leaves 194-198.The following dissertation considers the single-scan two-dimensional positional accuracy of a pulsed surveillance radar. The theoretical aspects to the positional accuracy are considered and a generalized analytical approach ...
Bras, Johan J
core   +1 more source

Numerical study on signatures of atmospheric convective cells in radar images of the ocean

, 1999
Current and wind variations at the ocean surface can give rise to a modulation of the sea surface roughness and thus become visible in radar images. The discrimination between radar signatures of oceanic and atmospheric phenomena can be quite difficult ...
Susanne Ufermann, Ufermann, S., Roland Romeiser, Romeiser, Roland, Ufermann, Susanne, Romeiser, R.   +5 more
core   +2 more sources

Radar Signatures of a Passenger Car [PDF]

, 2007
The upcoming new SAR satellites like TerraSAR-X and Radarsat-2 offer high spatial image resolution and dual receive antenna capabilities which open new opportunities for world-wide traffic monitoring applications.
Palubinskas, Gintautas, Runge, Hartmut
core   +1 more source

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

Advanced 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, Haider Abbas, Muhammad Rabeel, Honggyun Kim, Ghulam Dastgeer, Muhammad Nasim, Furqan Zahoor, Yawar Abbas, Waqas Ahmad, Deok‐kee Kim   +9 more
wiley   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

Polarimetric radar cross-section imaging

, 2017
The radar cross-section (RCS) is a fundamental quantity which determines if a radar target can be reliably detected by a radar system. This quantity can be modified by altering the shape of the target.
Dallmann, Thomas 1985-, Verlag Dr. Hut (München)   +1 more
core   +2 more sources

Analysis of bistatic multiphoton quantum radar cross section for the cylindrical surface

Optics Express
A closed-form model of bistatic multiphoton quantum radar cross section (QRCS) for the cylindrical surface, the main structure of typical aircraft, especially missiles, is established to analyze the system and scattering characteristics. The influence of curvature of the three-dimensional target on QRCS is analyzed.
Zhifu Tian, Tao Hu, Di Wu, Shu Wang
openaire   +2 more sources

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Introducing Equivalent Radar Cross Section – A First Step Toward new Radiometric Requirement Definitions [PDF]

, 2014
Stringent radiometric SAR system requirements often significantly shape the design and cost of modern SAR systems. Yet the wording in current requirement documents is ambiguous, and a diligent conformance assessment at the end of project phases currently
Döring, Björn, Schwerdt, Marco
core