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浏览/检索结果: 共124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 Spanwise phase transition between pure modes A and B in a circular cylinder’s wake. Part II: spatiotemporal evolution of vorticity 期刊论文  OAI收割 Fluid Dynamics Research, 2023, 卷号: 55, 期号: 5 作者:  Lin,L M;  Lin LM(林黎明)   |  收藏  |  浏览/下载：23/0  |  提交时间：2023/11/28 spanwise phase transition  wake  circular cylinder  mode A  mode B   Wear-resistant Ag-MAX phase 3D interpenetrating-phase composites: Processing, structure, and properties 期刊论文  OAI收割 NANO RESEARCH, 2023, 页码: 14 作者:  Guo, Yu;  Xie, Xi;  Liu, Zengqian;  Zhuo, Longchao;  Zhang, Jian   |  收藏  |  浏览/下载：17/0  |  提交时间：2024/01/08 three-dimensional (3D) interpenetrating-phase architecture  Ag-MAX (M = early transition metal  A = element from III or IV main groups  and X = carbon or/and nitrogen) phase composites  melt infiltration  electrical contact materials  mechanical properties  wear resistance   Planar slip triggered by successive dislocation-precipitate interaction in titanium alloys 期刊论文  OAI收割 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 卷号: 882, 页码: 6 作者:  Guo, H.;  Zhang, M. M.;  Xu, D. S.;  Zhang, J. H.;  Qiu, J. K.   |  收藏  |  浏览/下载：20/0  |  提交时间：2024/01/08 Planar slip  Molecular dynamics  a(2) phase  Anti-phase boundary  Titanium   Mechanism of 6-ferrite decomposition in high Si-bearing austenitic stainless steel weld metal during aging at 550 degrees C 期刊论文  OAI收割 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2023, 卷号: 876, 页码: 11 作者:  Chen, Yakui;  Wei, Shitong;  Wu, Dong;  Lu, Shanping   |  收藏  |  浏览/下载：13/0  |  提交时间：2024/01/07 Austenitic stainless steel weld metal  6-ferrite  a-phase  G-phase  Impact toughness   Phase transition between pure modes A and B in a circular cylinder's wake. Part I: analysis of fluid forces 期刊论文  OAI收割 FLUID DYNAMICS RESEARCH, 2023, 卷号: 55, 期号: 3, 页码: 35502 作者:  Lin LM(林黎明)   |  收藏  |  浏览/下载：21/0  |  提交时间：2023/07/17 phase transition  wake  circular cylinder  mode A  mode B   Pharmacodynamic, pharmacokinetic, and phase 1a study of bisthianostat, a novel histone deacetylase inhibitor, for the treatment of relapsed or refractory multiple myeloma 期刊论文  OAI收割 ACTA PHARMACOLOGICA SINICA, 2021, 页码: 9 作者:  Zhou, Yu-bo;  Zhang, Yang-ming;  Huang, Hong-hui;  Shen, Li-jing;  Han, Xiao-feng   |  收藏  |  浏览/下载：75/0  |  提交时间：2021/11/04 multiple myeloma  HDAC inhibitor  bisthianostat  pharmacodynamics  pharmacokinetics  phase 1a clinical trial  antitumor drug   Superior electrochemical performance of La-Mg-Ni-based alloys with novel A(2)B(7)-A(7)B(23) biphase superlattice structure 期刊论文  OAI收割 JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2021, 卷号: 80, 页码: 128-138 作者:  Liu, Jingjing;  Zhu, Shuai;  Chen, Xiangyu;  Xu, Jie;  Zhang, Lu   |  收藏  |  浏览/下载：75/0  |  提交时间：2021/10/15 Nickel metal hydride battery  Hydrogen storage alloy  A(7)B(23)-type phase  Electrochemical property  Effect mechanism   Synchronous X-ray/Optical QPOs from the Black Hole LMXB MAXI J1820+070 期刊论文  OAI收割 Monthly Notices of the Royal Astronomical Society, 2021 作者:  HXMT   |  收藏  |  浏览/下载：52/0  |  提交时间：2022/02/08 black hole physics  Low Mass X-ray Binaries  accretion  accretion  discs  stars: individual (MAXI J1820+070)  Astrophysics - High Energy  Astrophysical Phenomena  Abstract: We present high-speed optical photometry from SAAO and SALT on the black hole LMXB MAXI J1820+070 (ASSASN-18ey), some of it simultaneous with NICER, Swift and Insight-HXMT X-ray coverage. We detect optical Quasi-Periodic Oscillations (QPOs) that move to higher frequencies as the outburst progresses, tracking both the frequency and evolution of similar X-ray QPOs previously reported. Correlated X-ray/optical data reveal a complex pattern of lags, including an anti-correlation and a sub-second lag that evolve over the first few weeks of outburst. They also show correlated components separated by a lag equal to the QPO period roughly centered on zero lag, implying that the inter-band variability is strongly and consistently affected by these QPOs at a constant phase lag of roughly ±Ю The synchronisation of X-ray and optical QPOs indicates that they must be produced in regions physically very close to each other  we thus propose that they can be explained by a precessing jet model, based on analogies with V404 Cyg and MAXI J1348-630.   Detection of Flare Multiperiodic Pulsations in Mid-ultraviolet Balmer Continuum, Lyl Hard X-Ray, and Radio Emissions Simultaneously 期刊论文  OAI收割 The Astrophysical Journal, 2021, 卷号: 921, 页码: 179 作者:  HXMT   |  收藏  |  浏览/下载：25/0  |  提交时间：2022/02/08 Solar flares  Solar oscillations  Solar ultraviolet emission  Solar  x-ray emission  Solar radio emission  1496  1515  1533  1536  1522  Astrophysics - Solar and Stellar Astrophysics  Abstract: Quasi-periodic pulsations (QPPs), which usually appear as temporal pulsations of the total flux, are frequently detected in the light curves of solar/stellar flares. In this study, we present the investigation of nonstationary QPPs with multiple periods during the impulsive phase of a powerful flare on 2017 September 6, which were simultaneously measured by the Hard X-ray Modulation Telescope (Insight-HXMT), as well as the ground-based BLENSW. The multiple periods, detected by applying a wavelet transform and Lomb-Scargle periodogram to the detrended light curves, are found to be ~20-55 s in the Ly`and mid-ultraviolet Balmer continuum emissions during the flare impulsive phase. Similar QPPs with multiple periods are also found in the hard X-ray emission and low-frequency radio emission. Our observations suggest that the flare QPPs could be related to nonthermal electrons accelerated by the repeated energy release process, i.e., triggering of repetitive magnetic reconnection, while the multiple periods might be modulated by the sausage oscillation of hot plasma loops. For the multiperiodic pulsations, other generation mechanisms could not be completely ruled out.   近海环境中抗生素分析样品前处理技术的研究进展 期刊论文  OAI收割 色谱, 2020, 卷号: 38, 期号: 1, 页码: 95-103 作者:  吕敏;  陈令新   |  收藏  |  浏览/下载：109/0  |  提交时间：2020/07/08 抗生素  近海  前处理技术  综述  antibiotics  coastal  pretreatment techniques  review  The widespread and massive usage of antibiotics for the prevention and treatment of diseases in human and animals have resulted in their continuous discharge into the environment, and finally, into the coastal environment through various pathways. Accumulation of antibiotics in aquatic organisms poses a great threat to ecological and human health, especially because it facilitates the generation and spread of bacterial resistance. Given the diverse range of antibiotics with various features, as well as their presence at low concentrations in the environment, it is imperative to develop pretreatment techniques for antibiotics in various matrices. In this paper, the pretreatment methods proposed in recent decades for antibiotics in coastal water, sediment, and biota are summarized, with emphasis on commonly used methods such as solid-phase extraction, solid-liquid extraction, matrix solid-phase dispersion, and QuEChERS. Additionally, the potential factors influencing the extraction performance and clean-up efficiency are analyzed. The advantages and disadvantages of the methods and their development are finally discussed.