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Segregation in magnetized fluidized bed with Geldart-B magnetizable and nonmagnetizable particles 期刊论文  OAI收割
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2021, 卷号: 164, 页码: 9
作者:  Tao, Jinliang;  Hao, Weikang;  Zhu, Quanhong
  |  收藏  |  浏览/下载：21/0  |  提交时间：2021/08/31
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：49/0  |  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.  
Density difference in pressure-filtrated wet cakes produced from spontaneous gelling slurries 期刊论文  OAI收割
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2019
作者:  Di, Zhengxian;  Shimai, Shunzo;  Zhao, Jin;  Jin, Dongliang;  Zhang, Jian
  |  收藏  |  浏览/下载：125/0  |  提交时间：2019/12/31
Theoretical insights into elaborating and regulating excited state dynamics for the novel 6-cyano-2-(2 '-hydroxyphenyl)imidazo[1,2a]pyridine system in polar and nonpolar solvents 期刊论文  OAI收割
MOLECULAR PHYSICS, 2019, 页码: 9
作者:  Xu, Lei;  Zhang, Qiaoli;  Zhang, Tianjie;  Yang, Dapeng
  |  收藏  |  浏览/下载：80/0  |  提交时间：2019/12/02
A TD-DFT investigation of the photo-induced excited state intramolecular proton transfer dynamics for the novel 5,5 '-(9,9-dihexyl-9H-fluorene-2,7-diyl)bis(2-benzo[d]thiazol-2-yl)phenol) system 期刊论文  OAI收割
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2019, 页码: 7
作者:  Yang, Dapeng;  Song, Xiaoyan;  Zhang, Tianjie;  Gao, Haiyan
  |  收藏  |  浏览/下载：54/0  |  提交时间：2019/12/02
Excited state hydrogen bond and proton transfer mechanism for (2-hydroxy-4-methoxyphenyl)(phenyl)-methanone azine: A theoretical investigation 期刊论文  OAI收割
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2019, 卷号: 210, 页码: 159-164
作者:  Song, Xiaoyan;  Zhang, Tianjie;  Zhang, Qiaoli;  Yang, Dapeng;  Yang, Guang
  |  收藏  |  浏览/下载：51/0  |  提交时间：2019/06/20
Excited state hydrogen bond and proton transfer mechanism for (2-hydroxy-4-methoxyphenyl)(phenyl)-methanone azine: a theoretical investigation 期刊论文  iSwitch采集
Spectrochimica acta part a-molecular and biomolecular spectroscopy, 2019, 卷号: 210, 页码: 159-164
作者:  Yang, Dapeng;  Yang, Guang;  Jia, Min;  Song, Xiaoyan;  Zhang, Qiaoli
收藏  |  浏览/下载：65/0  |  提交时间：2019/05/08
Insights into the excited state dynamical process for 3-hydroxy-2-(5-(5-(5-(3-hydroxy-4-oxo-4H-chromen-2-yl)thiophen-2-yl)thiophen-2-yl)thiophen-2-yl)-4H-chromen-4-one 期刊论文  OAI收割
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2019, 卷号: 32, 期号: 3, 页码: 8
作者:  Song, Xiaoyan;  Wang, Yusheng;  Yang, Guang;  Jia, Min;  Yang, Dapeng
  |  收藏  |  浏览/下载：45/0  |  提交时间：2019/06/20
Insights into the excited state dynamical process for 3-hydroxy-2-(5-(5-(5-(3-hydroxy-4-oxo-4h-chromen-2-yl)thiophen-2-yl)thiophen-2-yl)thiophen-2-yl)-4h-chromen-4-one 期刊论文  iSwitch采集
Journal of physical organic chemistry, 2019, 卷号: 32, 期号: 3, 页码: 8
作者:  Wang, Yusheng;  Yang, Guang;  Jia, Min;  Song, Xiaoyan;  Zhang, Qiaoli
收藏  |  浏览/下载：50/0  |  提交时间：2019/05/08
Exploring and elaborating the excited state mechanism of a novel AIE material 2-(5-(4-carboxyphenyl)-2-hydroxyphenyl)benzothiazole 期刊论文  OAI收割
STRUCTURAL CHEMISTRY, 2018, 卷号: 29, 期号: 6, 页码: 1767-1773
作者:  Zhang, Qiaoli;  Zhao, Jinfeng;  Yang, Guang;  Jia, Min;  Song, Xiaoyan
  |  收藏  |  浏览/下载：151/0  |  提交时间：2019/06/20