Results 51 to 60 of about 1,212,296 (347)

RIPless Based Radar Waveform Analysis in Sparse Microwave Imaging

open access: yesLeida xuebao, 2013
The echo data can be modeled as the product of the Toeplitz matrix and reflectivity of the observed scene. The row of the Toeplitz matrix is the time-shift of the transmitted signal.
Zhao Yao   +3 more
doaj   +1 more source

Nonlinear effects in microwave photoconductivity of two-dimensional electron systems

open access: yes, 2003
We present a model for microwave photoconductivity of two-dimensional electron systems in a magnetic field which describes the effects of strong microwave and steady-state electric fields.
Anderson P W Brinkman W F   +44 more
core   +1 more source

Variable frequency microwave (VFM) processing facilities and application in processing thermoplastic matrix composites [PDF]

open access: yes, 2003
Microwave processing of materials is a relatively new technology advancement alternative that provides new approaches for enhancing material properties as well as economic advantages through energy savings and accelerated product development.
Ball, J. A. R.   +3 more
core   +1 more source

Short peptide perturbs spermatogenesis via immune microenvironment dysregulation and mitochondrial imbalance

open access: yesFEBS Open Bio, EarlyView.
In the blood–testis barrier, occludin is crucial for tight junctions. This study demonstrates that occludin‐targeting short peptides disrupt junction integrity, inducing immune cell infiltration, tumor necrosis factor‐α/interleukin‐6 secretion and mitochondrial dysfunction, ultimately triggering apoptosis.
Heng Wang, Xiaofang Tan, Deyu Chen
wiley   +1 more source

Measuring Ocean Surface Current in the Kuroshio Region Using Gaofen-3 SAR Data

open access: yesApplied Sciences, 2021
The Kuroshio is the strongest warm current in the western North Pacific, which plays a crucial role in climate and human activities. In terms of this, the accurate acquisition of ocean surface current velocity and direction in the Kuroshio region is of ...
Yan Li   +4 more
doaj   +1 more source

Sea Spike Suppression Method Based on Optimum Polarization Ratio in Airborne SAR Images

open access: yesSensors, 2021
In the condition of ocean observation for high-resolution airborne synthetic aperture radar (SAR), sea spikes will cause serious interference to SAR image interpretation and marine target detection. In order to improve the ability of target detection, it
Yawei Zhao   +4 more
doaj   +1 more source

Nanophotonic soliton-based microwave synthesizers

open access: yes, 2019
Microwave photonic technologies, which upshift the carrier into the optical domain to facilitate the generation and processing of ultrawide-band electronic signals at vastly reduced fractional bandwidths, have the potential to achieve superior ...
Bouchand, Romain   +9 more
core   +1 more source

Performance Triggered Adaptive Model Reduction for Soil Moisture Estimation in Precision Irrigation

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
ABSTRACT Accurate soil moisture information is essential for precise irrigation to enhance water use efficiency. Estimating soil moisture based on limited soil moisture sensors is especially critical for obtaining comprehensive soil moisture information when dealing with large‐scale agricultural fields.
Sarupa Debnath   +4 more
wiley   +1 more source

SNR‐dependent drone classification using convolutional neural networks

open access: yesIET Radar, Sonar & Navigation, 2022
Radar sensing offers a method of achieving 24‐h all‐weather drone surveillance, but in order to be maximally effective, systems need to be able to discriminate between birds and drones.
Holly Dale   +5 more
doaj   +1 more source

Reducing multiphoton ionization in a linearly polarized microwave field by local control [PDF]

open access: yesPhys. Rev. A 74, 053408 (2006), 2006
We present a control procedure to reduce the stochastic ionization of hydrogen atom in a strong microwave field by adding to the original Hamiltonian a comparatively small control term which might consist of an additional set of microwave fields. This modification restores select invariant tori in the dynamics and prevents ionization.
arxiv   +1 more source

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