Results 71 to 80 of about 6,349 (294)

MILLIMETER WAVE RADAR DESIGN CONSIDERATIONS

Electrica, 2003
This study addresses the design considerations of an air to ground millimeter wave radar (seeker). Briefly, all major aspects such as seeker components, required mathematical formulation, system parameters, signal processing is included.
Osman YILDIRIM
doaj   +2 more sources

Sea Fog Recognition near Coastline Using Millimeter-Wave Radar Based on Machine Learning

Atmosphere
Sea fog is a hazardous natural phenomenon that reduces visibility, posing a threat to ports and nearshore navigation, making the identification of nearshore sea fog crucial.
Tao Li, Jianhua Qiu, Jianjun Xue
doaj   +1 more source

PancDS in Real‐World Practice: A Prospective Multicenter Validation of a Clinical Decision‐Support System Bridging Experience Gaps in Pancreatic Lesion Diagnosis

Advanced Science, EarlyView.
A biomimetic artificial intelligence system, PancDS, has been developed to distinguish pancreatic ductal adenocarcinoma from mass‐forming pancreatitis by adaptively integrating clinical data, radiomics, and deep learning features. Validated across multicenter, reader‐study, and prospective settings, PancDS improves diagnostic accuracy, particularly for
Zhibo Wang, Weinuo Qu, Wenwen Cai, Chuhuai Wang, Chenxi Lyu, Qingguo Xie, Qian Chu, Yaqi Shen, Peng Xiao, Feng Li, Qingpeng Zhang, Jiali Li, Jeong Min Lee, Zhen Li   +13 more
wiley   +1 more source

Bridged h‐BN Nanosheets Coatings: Simultaneous Shielding Atomic‐Oxygen Irradiation and Achieving Superior Friction Performance

Advanced Science, EarlyView.
ABSTRACT To confront extreme space environments, a combination of inorganic and organic coatings can provide a pathway for offering highly durable radiation resistance and anti‐friction simultaneously. Herein, a strong interfacial 3D hydrogen‐bonding network is designed to create robust hexagonal boron nitride (h‐BN) based polymer coatings with ...
Zhuoyi Li, Changning Bai, Xingkai Zhang, Yusheng Liang, Wei Wu, Dingrui Zhou, Tao Du, Chunjin Wang   +7 more
wiley   +1 more source

Thermoelectric PANI/TeNWs Fiber Based Microsensor for Passive Temperature and Active Chemical Sensing

Advanced Science, EarlyView.
Continuous wet‐spinning of PANI with TeNWs yields a multifunctional microfiber. Oriented TeNWs impose chain alignment and enhance π‐electron delocalization, boosting the Seebeck coefficient to 59.9 µV K−1 for passive temperature sensing (1 K detection limit), while achieving high pH sensitivity (59.25 mV pH−1) and rapid NH3 response (0.96 s).
Dongmei Xie, Mengran Chen, Xuefei Zhang, Yan Xu, Weiye Geng, Zhe Tang, Si‐ze Lou, Shun Wan, Zhenguo Liu, Heng Liu, Peng‐an Zong   +10 more
wiley   +1 more source

Millimeter-wave integrated radar systems and techniques

, 2017
Recent advances in semiconductor fabrication are providing the opportunity to build very small and cost-effective single chip integrated radar systems operating at millimeter-wave frequencies and beyond.
Sithamparanathan Kandeepan, Marco Martorella, Evans, Robin J., Bill Moran, Akram Al-Hourani, Moran, Bill, Udaya Parampalli, Stan Skafidas, Al-Hourani, Akram, Farrell, Peter M., Robin J. Evans, Peter M. Farrell, Parampalli, Udaya, Martorella, Marco; id_orcid, Kandeepan, Sithamparanathan, Martorella, Marco, Skafidas, Stan   +16 more
core   +1 more source

Surface‐Spin‐Induced Magnetic Loss Enhancement in Ultralight Electromagnetic Absorbers

Advanced Science, EarlyView.
Fe3O4 nanoparticles with different hollow rates were synthesized to demonstrate the key role of surface moment in magnetic loss process. Using the same volume filling ratio, the 54.1% hollow Fe3O4 absorber represents about 20% enhancement in the imaginary part (μ'') than solid particles due to the coexisting magnetic resonance of inside and outside ...
Ruimin Ren, Ke Yang, Chichong Lu, Song Ma, Bowen Zheng, Zhenhui Ma   +5 more
wiley   +1 more source

Sparse random SAR trajectories for a millimeter wave 3D radar scanner

, 2022
S.843-852By use of a simplified mathematical model assuming far-field conditions and time-harmonic transmitted electromagnetic waves, the SAR trajectory (SAR = synthetic aperture radar) for a millimeter wave 3D radar scanner is identified with a planar ...
Rama, J., Heinrich, W., Herschel, R.
core   +1 more source

Radar Mapping Technology Based on Millimeter-wave Multi-baseline InSAR

Leida xuebao, 2019
The characteristics of airborne millimeter-wave Interferometric Synthetic Aperture Radar (InSAR) include unrestricted light, large surveying width, and high mapping precision.
LI Jun, WANG Guanyong, WEI Lideng, LU Yaobing, HU Qingrong   +4 more
doaj   +1 more source

Graphene Aerogels With Spherical Pore Structure for Broad Frequency Regulation and Enhanced Low‐Frequency Response

Advanced Science, EarlyView.
A graphene aerogel with a spherical‐pore structure is constructed via microbubble templating. This unique architecture suppresses strain‐induced percolation of conductive networks, enabling dynamic frequency tuning. It also delivers enhanced low‐frequency absorption with an effective absorption bandwidth of 2.56 GHz, covering 91% of the low‐frequency ...
Liang Li, Jiale Yan, Gengping Wan, Changlong Du, Yubing Lv, Yongzhu Yan, Zhaoyang Li, Guizhen Wang   +7 more
wiley   +1 more source