Results 91 to 100 of about 96,571 (279)
Deep Learning Methods for Assessing Time‐Variant Nonlinear Signatures in Clutter Echoes
Advanced Intelligent Systems, EarlyView.Motion classification from biosonar echoes in clutter presents a fundamental challenge: extracting structured information from stochastic interference. Deep learning successfully discriminates object speed and direction from bat‐inspired signals, achieving 97% accuracy with frequency‐modulated calls but only 48% with constant‐frequency tones. This work
Ibrahim Eshera +2 more
wiley +1 more source
Comparison of Passive Sonar Narrowband Detection and Wideband Detection Performance
, 2021 Tianhao Yang, Qiming Ma, Tuo Chen
openalex +1 more source
Design of a high-order narrowband superconducting balanced filter based on asymmetrically coupled stepped-impedance resonators [PDF]
, 2020 Haiwen Liu, Jiaming Tang
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Angewandte Chemie International Edition, EarlyView.Rapid RASER MRI allows for image acquisition without RF excitation. Instead, a population inversion on the nuclear spins is generated by SABRE hyperpolarization, which allows for self‐excitation through the RASER approach. When the desired transverse magnetization is built‐up, conventional EPI encoding is triggered to record the image.
Sören Lehmkuhl +7 more
wiley +1 more source
Interconversion of Optical to Terahertz Pulses in Nonlinear Beta Barium Borate Crystal
Advanced Physics Research, EarlyView.ABSTRACT Low‐temperature β‐phase barium borate (β‐BBO) is an important nonlinear crystal, widely utilized for optical second‐harmonic (SH) generation. Recent re‐measurements of refractive indices in the terahertz (THz) range reveal that β‐BBO is a positive uniaxial crystal.
Yingyu Guo +8 more
wiley +1 more source
Filterless Near‐Infrared Narrowband Photodetectors Based on Mixed Metal Perovskite Single Crystals [PDF]
Jia Liu +13 more
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Joint Symbol Detection and Multi-Channel Acquisition in Fast-Fading Narrowband Wireless Environments [PDF]
, 2002 João Xavier, V. Barroso, T. Patrao
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Arthritis &Rheumatology, EarlyView.Objective Cellular mechanisms driving transition from psoriasis to psoriatic arthritis have remained largely elusive. Thus, we investigated changes within the peripheral blood T cell compartment associated with the transition phase. Methods In an observational study, 116 patients were examined and categorized into subgroups including psoriasis with at ...
Hanna Graßhoff +19 more
wiley +1 more source
Ultra-narrowband terahertz circular dichroism driven by planar metasurface supporting chiral quasi bound states in continuum [PDF]
, 2023 Jitao Li +5 more
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Carbon Energy, EarlyView.Traditional carbon materials show limited high‐temperature oxidation resistance, which becomes pronounced above 673 K and significantly restricts their practical applicability. To address this challenge, enhancing polarization loss and leveraging its negative temperature dependence to offset the temperature‐induced increase in conductance loss are ...
Yang Li +9 more
wiley +1 more source