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浏览/检索结果: 共61条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Effect of bending kinematics for caudal fin on swimming performance with varying undulation wavelengths 期刊论文  OAI收割 OCEAN ENGINEERING, 2024, 卷号: 311, 页码: 17 作者:  Huang, Shun;  Guo, Dilong;  Song, Jialei;  Wang, Yiwei;  Yang, Guowei   |  收藏  |  浏览/下载：3/0  |  提交时间：2024/10/08 Fish swimming performance  Bending kinematics  Caudal fin  Undulation wavelengths  Immersed boundary method   Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文  OAI收割 The Astrophysical Journal, 2020, 卷号: 901, 页码: L7 作者:  HXMT   |  收藏  |  浏览/下载：23/0  |  提交时间：2022/02/08 Radio transient sources  Magnetars  Soft gamma-ray repeaters  2008  992  1471  Astrophysics - High Energy Astrophysical Phenomena  Astrophysics - Instrumentation and Methods for Astrophysics  Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of AJ = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 1014 Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to RNIR ? 0.025 (fluence index ?0.35).   Concept of an Experimental Ultralong-Wavelength Radio Array 期刊论文  OAI收割 RADIO SCIENCE, 2019, 卷号: 54, 期号: 7, 页码: 660-670 作者:  Chen, Linjie;  Yan, Yihua   |  收藏  |  浏览/下载：15/0  |  提交时间：2020/03/10 ultralong wavelengths  radio array  radio astronomy   Quantum Confined Indium-Rich Cluster Lasers with Polarized Dual-Wavelength Output 期刊论文  OAI收割 Acs Photonics, 2019, 卷号: 6, 期号: 8, 页码: 1990-1995 作者:  Q.N.Yu;  M.Zheng;  H.X.Tai;  W.Lu;  Y.Shi   |  收藏  |  浏览/下载：39/0  |  提交时间：2020/08/24 InGaAs/GaAs,strains,quantum confined lasers,indium-rich clusters,dual wavelengths,polarization,surface-emitting laser,semiconductor-laser,temperature-dependence,segregation,emission,growth,si,Science & Technology - Other Topics,Materials Science,Optics,Physics   Ca-40(+) optical frequency standards with high accuracy 期刊论文  OAI收割 ACTA PHYSICA SINICA, 2018, 卷号: 67, 期号: 16, 页码: 10 作者:  Guan Hua;  Huang Yao;  Li Cheng-Bin;  Gao Ke-Lin   |  收藏  |  浏览/下载：50/0  |  提交时间：2018/11/05 optical frequency standards  precision measurements  Ca-40(+) ion  magic wavelengths   Evaluation of growth characteristics of Aspergillus parasiticus inoculated in different culture media by shortwave infrared (SWIR) hyperspectral imaging 期刊论文  OAI收割 JOURNAL OF INNOVATIVE OPTICAL HEALTH SCIENCES, 2018, 卷号: 11, 期号: 5, 页码: 1850031 作者:  Chu, Xuan;  Wang, Wei;  Ni, Xinzhi;  Zheng, Haitao;  Zhao, Xin   |  收藏  |  浏览/下载：100/0  |  提交时间：2019/09/24 Aspergillus parasiticus  growth characteristics  characteristic wavelengths  shortwave infrared (SWIR) hyperspectral imaging   A hybrid invisibility cloak based on integration of transparent metasurfaces and zero-index materials 期刊论文  OAI收割 Light-Science & Applications, 2018, 卷号: 7, 页码: 8 作者:  Chu, H. C.;  Li, Q.;  Liu, B. B.;  Luo, J.;  Sun, S. L.   |  收藏  |  浏览/下载：16/0  |  提交时间：2019/09/17 refractive-index  metamaterials  phase  polarization  realization  light  wavelengths  resolution  Optics   Accurate determination of black-body radiation shift, magic and tune-out wavelengths for the 6S(1/2) -> 5D(3/2) clocktransition in Yb+ 期刊论文  OAI收割 JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2017, 卷号: 50, 期号: 20 作者:  De, S.;  Sahoo, B. K.;  Arora, Bindiya;  Roy, A.   |  收藏  |  浏览/下载：25/0  |  提交时间：2017/12/06 Yb++ Ion Clocks  Magic Wavelengths  Black Body Radiation Shifts  Dipole Polarizabilities   Accurate determination of black-body radiation shift, magic and tune-out wavelengths for the 6S1/2 ? 5D3/2 clock transition in Yb+ 期刊论文  OAI收割 Journal of Physics B: Atomic, Molecular and Optical Physics, 2017, 卷号: 50, 期号: 20 作者:  De,S;  Arora,Bindiya;  Sahoo,B K;  Roy,A   |  收藏  |  浏览/下载：24/0  |  提交时间：2018/11/05 Yb+ ion clocks  magic wavelengths  black body radiation shifts  dipole polarizabilities   An Automatic Detection and Classification Method of the Splicing Abnormality in the Stellar Spectra for LAMOST 期刊论文  OAI收割 SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 卷号: 37, 期号: 7, 页码: 2250-2253 作者:  Meng Fan-long;  Pan Jing-chang;  Yu Jing-jing;  Wei Peng 收藏  |  浏览/下载：31/0  |  提交时间：2017/09/06 Splicing wavelengths  Spectra pretreatment  Segmentation fitting  Deviation  Abnormal grading