Results 111 to 120 of about 6,696,337 (373)

Global Polarimetric Synthetic Aperture Radar Image Segmentation with Data Augmentation and Hybrid Architecture Model

Remote Sensing
Machine learning and deep neural networks have shown satisfactory performance in the supervised classification of Polarimetric Synthetic Aperture Radar (PolSAR) images. However, the PolSAR image classification task still faces some challenges. First, the
Zehua Wang, Zezhong Wang, Xiaolan Qiu, Zhe Zhang   +3 more
doaj   +1 more source

EBG Based Microstrip Patch Antenna for Brain Tumor Detection via Scattering Parameters in Microwave Imaging System

International Journal of Biomedical Imaging, 2018
A microwave brain imaging system model is envisaged to detect and visualize tumor inside the human brain. A compact and efficient microstrip patch antenna is used in the imaging technique to transmit equivalent signal and receive backscattering signal ...
Reefat Inum, M. Rana, Kamrun Nahar Shushama, M. A. Quader   +3 more
semanticscholar   +1 more source

Magnetic‐Field Dependent VB− Spin Decoherence in Hexagonal Boron Nitrides: A First‐Principles Study

Advanced Functional Materials, EarlyView.
This study investigates the decoherence of the VB− defect in h‐BN under external magnetic fields using first‐principles quantum many‐body simulations. A transition boundary distinguishing distinct decoherence regimes is identified, with its dependence on isotopic composition.
Jaewook Lee, Hyeonsu Kim, Huijin Park, Hosung Seo   +3 more
wiley   +1 more source

All‐Optical Electric Field Sensing with Nanodiamond‐Doped Polymer Thin Films

Advanced Functional Materials, EarlyView.
The photoluminescence (PL) of fluorescent nanodiamonds (FNDs) in a polymer‐based capacitor device is sensitive to electric fields. When an external electric field is applied, the PL intensity of the negatively charged nitrogen‐vacancy center (NV‐) increases, while that of the neutrally charged NV center (NV0) decreases.
Roy Styles, Mengke Han, Toon Goris, Jim G. Partridge, Brett C. Johnson, Blanca del Rosal, Amanda N. Abraham, Heike Ebendorff‐Heidepriem, Brant C. Gibson, Nikolai Dontschuk, Jean‐Philippe Tetienne, Philipp Reineck   +11 more
wiley   +1 more source

Model-based CP Selection Method for Calibration of Airborne InSAR with Sparse GCPs

Leida xuebao, 2012
High-precision height acquisition needs to correct the interferometric parameters errors by interferometric calibration for Interferometric Synthetic Aperture Radar (InSAR) system with many Ground Control Points (GCPs).
Hu Ji-wei, Hong Jun, Ming Feng, Li Liang
doaj   +1 more source

Integrated Metallo‐Dielectric 3D Hotspots From High Refractive Index Nanodiamond‐Plasmonic Gold Cryosoret Nano‐Assemblies for Photonic Crystal Enhanced Fluorescence

Advanced Functional Materials, EarlyView.
This work presents a novel sensing platform using metallo‐dielectric cryosoret nano‐assemblies and lossless photonic crystals to overcome limitations of conventional plasmonic biosensors. The hybrid system enhances both electric and magnetic field interactions, enabling amplified fluorescence, ultralow detection limits, and prism‐free, objective‐free ...
Seemesh Bhaskar, Weinan Liu, Skye Shepherd, Devinda Wijewardena, Joseph Tibbs, Brian T. Cunningham   +5 more
wiley   +1 more source

Few-shot Ship Classification of SAR Images via Scattering Point Topology and Dual-branch Convolutional Neural Network

Leida xuebao
With the widespread application of Synthetic Aperture Radar (SAR) images in ship detection and recognition, accurate and efficient ship classification has become an urgent issue that needs to be addressed. In few-shot learning, conventional methods often
Yipeng ZHANG, Dongdong LU, Xiaolan QIU, Fei LI   +3 more
doaj   +1 more source

Superconducting Material Diagnostics using a Scanning Near-Field Microwave Microscope

, 1998
We have developed scanning near-field microwave microscopes which can image electrodynamic properties of superconducting materials on length scales down to about 2 $\mu$m.
Anlage, Steven M., Dutta, Sudeep K., Feenstra, B. J., Hu, Wensheng, Steinhauer, D. E., Thanawalla, A. S., Vlahacos, C. P., Wellstood, F. C.   +7 more
core   +2 more sources

SMaRT Stacking: A Methodology to Produce Optimally Layered EMI Shields with Maximal Green Index Using Fused Deposition Modeling

Advanced Functional Materials, EarlyView.
Electromagnetic interference (EMI) shields consisting of polylactic acid (PLA) in layers with different concentrations of multiwalled carbon nanotubes (MWCNT) are produced using additive manufacturing. The permittivity function of layers with different filler concentrations is learned using data of homogeneous and randomly ordered shields.
Stijn De Smedt, Brecht Evens, Pramod Ravichandran, Panagiotis Patrinos, Frederik Van Loock, Ruth Cardinaels   +5 more
wiley   +1 more source

Microwave Imaging Using Noise Signals

IEEE transactions on microwave theory and techniques, 2018
A new method of active incoherent microwave imaging is presented that uses noise signals and spatial frequency sampling. Building on interferometric spatial frequency sampling arrays developed in radio astronomy, active incoherent microwave imaging ...
Stavros Vakalis, J. Nanzer
semanticscholar   +1 more source