Results 81 to 90 of about 6,827,955 (283)

Robust adaptive beamforming method based on desired signal steering vector estimation and interference-Plus-noise covariance matrix reconstruction

The Journal of Engineering, 2019
Here, the authors propose a robust adaptive beamforming method based on desired signal steering vector estimation and interference-plus-noise covariance matrix reconstruction, so as to attenuate the influences of the desired signal steering vector ...
Junsheng Huang, Hongtao Su, Yang Yang
doaj   +1 more source

Clutter suppression based on iterative reweighted methods with multiple measurement vectors for airborne radar

IET Radar, Sonar & Navigation, 2022
Sparse recovery algorithms have been applied to the Space‐time adaptive processing for reducing the requirement of samples over the past 15 years. However, many Sparse recovery algorithms are not robust and need accurate user parameters.
Cheng Liu, Tong Wang, Shuguang Zhang, Bing Ren   +3 more
doaj   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source

A modified design method of pulse repetition frequency for synthetic aperture radar system based on the single point equivalent squint model

IET Radar, Sonar & Navigation, 2021
Pulse repetition frequency (PRF) is an essential parameter in synthetic aperture radar (SAR). However, a small PRF value will cause spectrum ambiguity and a large value will increase the computational complexity.
Yujie Liang, Yi Liang, Gang Zhang, Mengdao Xing   +3 more
doaj   +1 more source

Amphiphilic Non‐Isocyanate Polyurethane Coatings With Tunable Antifouling and Fouling‐Release Performance: A Log‐Ratio Assessment Framework

Advanced Materials Interfaces, EarlyView.
Amphiphilic non‐isocyanate polyurethane (NIPU) coatings containing reactive hydrophobic poly(dimethylsiloxane) (PDMS) and hydrophilic methoxy poly(ethylene glycol) (MPEG) prepolymers for marine antifouling (AF) and fouling‐release (FR) applications were investigated. The coatings were evaluated with a set of representative marine foulants.
Nastaran Shahzadeh, Shane J. Stafslien, Lyndsi J. VanderWal, John A. Finlay, Peter Allen, Anthony S. Clare, Ivan Hevus, Dean C. Webster   +7 more
wiley   +1 more source

Direction-of-Arrival Estimation for Circulating Space-Time Coding Arrays: From Beamspace MUSIC to Spatial Smoothing in the Transform Domain

Sensors, 2018
As a special type of coherent collocated Multiple-Input Multiple-Output (MIMO) radar, a circulating space-time coding array (CSTCA) transmits an identical waveform with a tiny time shift. It provides a simple way to achieve a full angular coverage with a
Huake Wang, Guisheng Liao, Jingwei Xu, Shengqi Zhu, Cao Zeng   +4 more
doaj   +1 more source

An Adaptive Hierarchical Detection Method for Ship Targets in High-Resolution SAR Images

Remote Sensing, 2020
With the improvement of image resolution in synthetic aperture radars (SARs), sea clutter characteristics become more complex, which poses new challenges to traditional ship target detection missions.
Yi Liang, Kun Sun, Yugui Zeng, Guofei Li, Mengdao Xing   +4 more
doaj   +1 more source

Micro‐Doppler frequency estimation and association via the inverse‐free complex SBL TVAR method

IET Radar, Sonar & Navigation, 2021
A micro‐Doppler frequency estimation and association algorithm of the space target based on the time‐varying autoregressive (TVAR) model is proposed herein.
Nan Su, Fengzhou Dai, Hongwei Liu, Bo Zhang   +3 more
doaj   +1 more source

Aerosol Jet Printing of Benzocyclobutene as a Thermally Stable, Low‐Loss Dielectric for Multilayer Microwave Electronics

Advanced Materials Technologies, EarlyView.
Multilayer aerosol jet printed components with a low‐loss, thermally stable dielectric are demonstrated using benzocyclobutene. Ink formulation and in‐line droplet evaporation control support high‐quality, versatile, and stable printing performance. A specialized measurement for low‐loss materials reveals promising microwave properties, which, combined
Md Ramjan Ali, Trent Moritz, Mohammad Tayeb Al Qaseer, Ethan B. Secor   +3 more
wiley   +1 more source

A high maneuvering dim target detection algorithm based on non-uniform sub-aperture division and hybrid accumulation

Xibei Gongye Daxue Xuebao
The motion state of highly maneuverable small target is complex, with weak scattering energy and difficulty in maintaining signal coherence over long integration time, resulting in ineffective accumulation of target echo signal.
LI Jiajia, TAO Haihong, WANG Le, QU Aopeng   +3 more
doaj   +1 more source