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5篇 您的检索式:作者名="J.W.Xu"
    题名 作者 年代 出处 被引量
1Synthesis of UV-curable Organic-inorganic Hybrid Urethane Acylates and Properties of Cured Films显示文摘J.W.Xu W.M.Pang W F Shi 0,,:1
2Synthesis and Crystallization Kinetics of Silsesquioxane-based Hybrid Star Poly(ε-caprolactone)显示文摘J.W.Xu W.F.Sii 0,,:1
3热辅助磁存储介质高性能润滑薄膜研究显示文摘一种具有良好热稳定性的新式润滑剂被开发并应用于在热辅助磁存储(HAMR)介质,达到存储面密度在1 Tb/in2或更高。与当前所通用的商业润滑剂相比,这种新近开发的润滑剂薄膜能够经受激光照射而不损坏,而Z–dol膜在相同的实验条件下被完全破坏。摩擦因数和浸润性也优于其它用于热辅助磁存储(HAMR)介质保护材料。J.Zhang R.Ji J.W.Xu J.K.P.Ng B.X.Xu S.B.Hu H.X.Yuan S.N.Piramanayagam 2008中国表面工程2008,21,6:1
4FAST Observations of an Extremely Active Episode of FRB 20201124A:Ⅰ.Burst Morphology显示文摘We report the properties of more than 600 bursts(including cluster-bursts)detected from the repeating fast radio burst(FRB)source FRB 20201124A with the Five-hundred-meter Aperture Spherical radio Telescope during an extremely active episode on UTC 2021 September 25–28,in a series of four papers.The observations were carried out in the band of 1.0–1.5 GHz by using the center beam of the L-band 19-beam receiver.We monitored the source in sixteen1 hr sessions and one 3 hr session spanning 23 days.All the bursts were detected during the first four days.In this first paper of the series,we perform a detailed morphological study of 624 bursts using the two-dimensional frequencytime“waterfall”plots,with a burst(or cluster-burst)defined as an emission episode during which the adjacent emission peaks have a separation shorter than 400 ms.The duration of a burst is therefore always longer than 1 ms,with the longest up to more than 120 ms.The emission spectra of the sub-bursts are typically narrow within the observing band with a characteristic width of~277 MHz.The center frequency distribution has a dominant peak at about 1091.9 MHz and a secondary weak peak around 1327.9 MHz.Most bursts show a frequencydownwarddrifting pattern.Based on the drifting patterns,we classify the bursts into five main categories:downward drifting(263)bursts,upward drifting(3)bursts,complex(203),no drifting(35)bursts,and no evidence for drifting(121)bursts.Subtypes are introduced based on the emission frequency range in the band(low,middle,high and wide)as well as the number of components in one burst(1,2,or multiple).We measured a varying scintillation bandwidth from about 0.5 MHz at 1.0 GHz to 1.4 MHz at 1.5 GHz with a spectral index of 3.0.D.J.Zhou J.L.Han B.Zhang K.J.Lee W.W.Zhu D.Li W.C.Jing W.-Y.Wang Y.K.Zhang J.C.Jiang J.R Niu R Luo H.Xu C.F.Zhang B.J.Wang J.W.Xu P.Wang Z.L.Yang Y.Feng 2022Research in Astronomy and Astrophysics2022,22,12:0
5Bio-inspired vision mimetics toward next-generation collision-avoidance automation显示文摘MOTIVATION The current“deep learning+large-scale data+strong supervised labeling”technology framework of collision avoidance for ground robots and aerial drones is becoming saturated.Its development gradually faces challenges from real open-scene applications,including small data,weak annotation,and crossscene.Inspired by the neural structure and processes underlying human cognition(eg,human visual,auditory,and tactile systems)and the knowledge learned from daily driving tasks,a high-level cognitive system is developed for integrating collision sensing and collision avoidance.This bio-inspired cognitive approach has the advantages of good robustness,high self-adaptability,and low computation consumption in practical driving scenes.Gary J.W.Xu Kun Guo Seop Hyeong Park Poly Z.H.Sun Aiguo Song 2023The Innovation2023,4,1:0
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