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浏览/检索结果: 共68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发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 The roles of fish median fins on the hydrodynamics and muscle actuation in carangiform swimming 期刊论文  OAI收割 JOURNAL OF FLUIDS AND STRUCTURES, 2023, 卷号: 123, 页码: 15 作者:  Li, Yuhan;  Song, Jialei;  Zhong, Yong;  Yin B(银波)   |  收藏  |  浏览/下载：18/0  |  提交时间：2024/01/01 Median fins  Muscle actuation  Hydrodynamics  Numerical simulation   Effects of process parameters on the spreading morphology of disc surface and aluminium powder produced by centrifugal atomisation 期刊论文  OAI收割 POWDER METALLURGY, 2023 作者:  Li L(李龙);  Peng L(彭磊);  Zhao W(赵伟)   |  收藏  |  浏览/下载：15/0  |  提交时间：2023/07/17 Centrifugal atomisation  rotary disc  spreading morphology  aluminium powder  particle size distribution  median diameter   蒙古高原250 m分辨率植被生长季NDVI年际时空变化数据集（2001–2021年） 期刊论文  OAI收割 中国科学数据(中英文网络版), 2023, 卷号: 8, 期号: 01, 页码: 53-64 作者:  徐洋;  杨雅萍;  陈晓娜;  乐夏芳   |  收藏  |  浏览/下载：29/0  |  提交时间：2023/05/04 蒙古高原  植被指数  Theil-Sen median趋势分析  Mann-Kendall检验  变异系数  Hurst指数  生长季  rgee   蒙古高原500 m分辨率植被物候及变化趋势数据集（2001–2019年） 期刊论文  OAI收割 中国科学数据(中英文网络版), 2023, 卷号: 8, 期号: 01, 页码: 30-43 作者:  张寅飞;  杨雅萍;  乐夏芳;  徐洋   |  收藏  |  浏览/下载：23/0  |  提交时间：2023/05/04 蒙古高原  植被物候  时空分布  Theil-Sen Median趋势分析  Mann-Kendall显著性检验  MCD12Q2  2001–2019   1992—2020年横断山区植被分布与植被活动变化 期刊论文  OAI收割 地理学报, 2022, 卷号: 77, 期号: 11, 页码: 2787-2802 作者:  杨靖;  戴君虎;  姚华荣;  陶泽兴;  朱梦瑶   |  收藏  |  浏览/下载：98/0  |  提交时间：2022/12/01 横断山区  植被分布  植被活动  转移矩阵  Theil-Sen Median趋势分析   Design and Locomotion Control of a Dactylopteridae-Inspired Biomimetic Underwater Vehicle With Hybrid Propulsion 期刊论文  OAI收割 IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING, 2021, 页码: 13 作者:  Zhang, Tiandong;  Wang, Rui;  Wang, Yu;  Cheng, Long;  Wang, Shuo   |  收藏  |  浏览/下载：30/0  |  提交时间：2022/01/27 Propulsion  DC motors  Robots  Control systems  Servomotors  Underwater vehicles  Sports  Biomimetic underwater vehicle (BUV)  body and  or caudal fin (BCF)  median and  or paired fin (MPF) hybrid propulsion  central pattern generators (CPGs)  fuzzy proportion integral differential (PID)   Ecotoxicity assessment of a molybdenum mining effluent using acute lethal, oxidative stress, and osmoregulatory endpoints in zebrafish (Danio rerio) 期刊论文  OAI收割 ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2020, 页码: 12 作者:  Chen, Dong;  Zhang, Jing;  Chen, Yi-ping   |  收藏  |  浏览/下载：55/0  |  提交时间：2020/12/29 Acid mine drainage  Median lethal concentration  Enzymatic antioxidant  Na+  K+-ATPase  Wastewater treatment  Environmental management   An adaptive regularized iterative FBP algorithm with high sharpness for irradiated fuel assembly reconstruction from few projections in FNCT 期刊论文  OAI收割 ANNALS OF NUCLEAR ENERGY, 2020, 卷号: 145 作者:  Li, Sangang;  Dong, Zhengyun;  Gan, Quan;  Song, Jing;  Yang, Qi   |  收藏  |  浏览/下载：43/0  |  提交时间：2020/10/26 Fast neutron computed tomography  Irradiated fuel assemblies  Filtered back-projection algorithm  Simultaneous iterative reconstruction technique  Median root prior  Total variation   A MLEM-TV-MRP Algorithm for Fast Neutron Computed Tomography Reconstruction of High Statistical Noise and Sparse Sampling 期刊论文  OAI收割 IEEE ACCESS, 2020, 卷号: 8 作者:  Li, Sangang;  Dong, Zhengyun;  Gan, Quan;  Yu, Shengpeng;  Yang, Qi   |  收藏  |  浏览/下载：91/0  |  提交时间：2020/10/22 Fast neutron computed tomography  maximum likelihood-expectation maximization  total variation  median root prior   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：26/0  |  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).