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浏览/检索结果: 共37条，第1-10条 帮助

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The fast rise of the unusual type IIL/IIb SN 2018ivc 期刊论文  OAI收割
ASTRONOMY & ASTROPHYSICS, 2024, 卷号: 692
作者:  Reguitti, A.;  Dastidar, R.;  Pignata, G.;  Maeda, K.;  Moriya, T. J.
  |  收藏  |  浏览/下载：7/0  |  提交时间：2024/12/16
Novel Nb26Mo4O77 rod-like nanoparticles anode with enhanced electrochemical performances for lithium-ion batteries 期刊论文  OAI收割
JOURNAL OF ALLOYS AND COMPOUNDS, 2022, 卷号: 890
作者:  Ma, Xiaohang;  Yu, Changyong;  Cao, Xian;  Hu, Jing;  Cheng, Nan
  |  收藏  |  浏览/下载：61/0  |  提交时间：2021/11/15
Identification of novel anti-inflammatory Nur77 modulators by virtual screening 期刊论文  OAI收割
BIOORGANIC CHEMISTRY, 2021, 卷号: 112, 页码: 7
作者:  Ding, Xiaoyu;  Zhao, Zijie;  Wu, Yue;  Zhang, Hao;  Chen, Kaixian
  |  收藏  |  浏览/下载：44/0  |  提交时间：2021/08/17
Intrinsic piezoelectricity in monolayer MSi2N4 (M = Mo, W, Cr, Ti, Zr and Hf) 期刊论文  OAI收割
EPL, 2020, 卷号: 132, 期号: 5, 页码: 6
作者:  Guo, San-Dong;  Zhu, Yu-Tong;  Mu, Wen-Qi;  Ren, Wen-Cai
  |  收藏  |  浏览/下载：22/0  |  提交时间：2021/03/15
71  20  -b  77  65  -j  
An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242 期刊论文  OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者:  HXMT
  |  收藏  |  浏览/下载：60/0  |  提交时间：2022/02/08
accretion  accretion disks  black hole physics  X-rays: binaries  time  Astrophysics - High Energy Astrophysical Phenomena  Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of Swift J1658.2-4242 during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.  
Synthesis of MeON-neoglycosides of digoxigenin with 6-deoxy- and 2,6-dideoxy-D-glucose derivatives and their anticancer activity 期刊论文  OAI收割
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, 2017, 卷号: 27, 期号: 15, 页码: 3359-3364
作者:  Wang, Dong-dong;  Li, Xiao-san;  Bao, Yu-zhou;  Liu, Jie;  Zhang, Xiao-kun
  |  收藏  |  浏览/下载：28/0  |  提交时间：2019/01/08
元素硒的无机氧化动力学研究Ⅱ:硝酸与二氧化锰的氧化 期刊论文  OAI收割
矿物岩石地球化学通报, 2017, 期号: 2, 页码: 319-326
作者:  路凯;  朱建明;  任堃;  谭德灿;  徐文坡
  |  收藏  |  浏览/下载：22/0  |  提交时间：2018/02/28
10W@77K气体轴承斯特林制冷机的性能和可靠性 会议论文  OAI收割
作者:  寇翠翠，王波，侯光泽，杨玉玲，刘昊，吴维薇
  |  收藏  |  浏览/下载：23/0  |  提交时间：2017/06/19
不同甩速制备的Fe_(77)Ga_(23)甩带合金的磁致伸缩性能和显微组织(英文) 期刊论文  OAI收割
Transactions of Nonferrous Metals Society of China, 2015, 期号: 1, 页码: 122-128
作者:  刘昊;  王海欧;  曹梦雄;  谭伟石;  时阳光
收藏  |  浏览/下载：48/0  |  提交时间：2015/12/09
Magnetostriction and microstructure of melt-spun Fe77Ga23 ribbons prepared with different wheel velocities 期刊论文  OAI收割
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2015, 卷号: 25, 期号: 1, 页码: 122-128
作者:  Liu, H;  Wang, HO;  Cao, MX;  Tan, WS;  Shi, YG
收藏  |  浏览/下载：37/0  |  提交时间：2016/04/18