Results 41 to 50 of about 20,927 (220)

Compressed sensing for wide-field radio interferometric imaging [PDF]

, 2010
For the next generation of radio interferometric telescopes it is of paramount importance to incorporate wide field-of-view (WFOV) considerations in interferometric imaging, otherwise the fidelity of reconstructed images will suffer greatly.
Baraniuk, Candès, Candès, Candès, Carilli, Carozzi, Chambolle, Combettes, Cornwell, Cornwell, Donoho, Durand, Finkbeiner, Górski, Hivon, Högbom, J. D. McEwen, McEwen, McEwen, McEwen, Potts, Rauhut, Romberg, Rudin, Schlegel, Suksmono, Thompson, Tropp, Wiaux, Wiaux, Wiaux, Wiaux, Y. Wiaux   +32 more
core   +1 more source

Scale-discretised ridgelet transform on the sphere [PDF]

, 2019
We revisit the spherical Radon transform, also called the Funk-Radon transform, viewing it as an axisymmetric convolution on the sphere. Viewing the spherical Radon transform in this manner leads to a straightforward derivation of its spherical harmonic ...
candes, candes, candes, chan, klein, mcewen, mcewen, mcewen, mcewen, mcewen, radon, sanz, starck   +12 more
core   +2 more sources

Coagulative Granular Hydrogels with an Enzyme Catalyzed Fibrin Network for Endogenous Tissue Regeneration

Advanced Healthcare Materials, EarlyView.
Coagulative granular hydrogels are composed of packed thrombin‐functionalized microgels that catalyze the conversion of fibrinogen into a secondary fibrin network, filling the interstitial voids. This bio‐inspired approach stabilizes the biomaterial to match the robustness of bulk hydrogels without compromising injectability, mimicking the initial ...
Zhipeng Deng, Camila B. Tovani, Simona Bianco, Gianni Comandini, Aya Elghajiji, Mina Aleemardani, Roxana Moscalu, Jeremie Zappia, Bianca Fernandes, Olivia Annett, Chrissy L. Hammond, Jason Wong, Dave J. Adams, Fabrizio Scarpa, Michael R. Whitehouse, Annela M. Seddon, James P. K. Armstrong   +16 more
wiley   +1 more source

3D imaging of moving targets for ultra‐wideband MIMO through‐wall radar system

IET Radar, Sonar & Navigation, 2021
Ultra‐wideband (UWB) radar is widely used in static through‐wall imaging (TWI). There are still many imaging problems of motion through‐wall targets for complex system structure and unknown wall environment.
Jun Pan, Shengbo Ye, Cheng Shi, Kun Yan, Xin Liu, Zhikang Ni, Guangyao Yang, Guangyou Fang   +7 more
doaj   +1 more source

Non-Linear Regularized Attenuation Compensation for Microwave Breast Imaging

IEEE Open Journal of Signal Processing, 2023
We develop non-linear optimization algorithms for attenuation compensation of rapidly time-varying microwave signals in the context of breast imaging.
Nasser Kazemi, Elise Fear
doaj   +1 more source

Terahertz dynamic aperture imaging at stand-off distances using a Compressed Sensing protocol

, 2019
In this text, results of a 0.35 terahertz (THz) dynamic aperture imaging approach are presented. The experiments use an optical modulation approach and a single pixel detector at a stand-off imaging distance of approx 1 meter.
Augustin, Sven, Frohmann, Sven, Huebers, Heinz-Wilhelm, Jung, Peter   +3 more
core   +1 more source

Sparse component separation for accurate CMB map estimation [PDF]

, 2012
The Cosmological Microwave Background (CMB) is of premier importance for the cosmologists to study the birth of our universe. Unfortunately, most CMB experiments such as COBE, WMAP or Planck do not provide a direct measure of the cosmological signal; CMB
Basak, S., Bobin, J., Starck, J. -L., Sureau, F.   +3 more
core   +5 more sources

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Geometric Continuity Characterization of Urban Buildings in SAR 3D Imaging Domain and Few-tracks 3D Imaging

Leida xuebao
Synthetic Aperture Radar (SAR) is an active microwave sensing technology capable of all-weather, day-and-night operation, making it a critical source of Earth observation data.
Fengming HU, Jifan TIAN, Guozhen CHENG, Feng XU   +3 more
doaj   +1 more source

Microwave Imaging of Non-Rigid Moving Target Using 2D Sparse MIMO Array

IEEE Access, 2019
This paper develops a microwave/mmw (millimeter-wave) imaging method for moving objects of non-rigid body which can be used in the heavy traffic scenarios.
Zhanyu Zhu, Lei Kuang, Feng Xu
doaj   +1 more source