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浏览/检索结果: 共30条，第1-10条 帮助

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Microscopic mechanism analysis of temperature influence on rock salt and thermal damage evolution of surrounding wall in underground salt cavern 期刊论文  OAI收割
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 2024, 卷号: 83, 期号: 10, 页码: 20
作者:  Li, Wenjing;  Feng, Kai;  Ma, Hongling;  Jiang, Wanlin;  Li, Jingjia
  |  收藏  |  浏览/下载：1/0  |  提交时间：2025/06/27
Terrestrial heat flow of Jizhong depression, China, Western Bohai Bay basin and its influencing factors 期刊论文  OAI收割
GEOTHERMICS, 2021, 卷号: 96, 页码: 13
作者:  Wang, Zhuting;  Rao, Song;  Xiao, Hongping;  Wang, Yibo;  Jiang, Guangzheng
  |  收藏  |  浏览/下载：31/0  |  提交时间：2021/11/01
mno2基材料常温催化降解甲醛研究进展 期刊论文  OAI收割
地球环境学报, 2020, 卷号: 11, 期号: 1, 页码: 14-30
作者:  刘亚茹;  黄宇
  |  收藏  |  浏览/下载：38/0  |  提交时间：2020/06/17
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：65/0  |  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.  
Change characteristics of precipitation and temperature in the Qilian Mountains and Hexi Oasis, Northwestern China 期刊论文  iSwitch采集
ENVIRONMENTAL EARTH SCIENCES, 2019, 卷号: 78, 期号: 9, 页码: 13
作者:  Wang, Lei;  Chen, Rensheng;  Han, Chuntan;  Wang, Xiqiang;  Liu, Guohua
收藏  |  浏览/下载：102/0  |  提交时间：2019/10/08
A New Set of Parameters of High-Mass X-ray Binaries Found with their Cyclotron Lines 期刊论文  OAI收割
arXiv e-prints, 2018
作者:  Zhang, Chengmin;  Taani, Ali;  Chaty, Sylvain;  Karino, Shigeyuki;  Song, Liming
  |  收藏  |  浏览/下载：84/0  |  提交时间：2019/07/12
Astrophysics - High Energy Astrophysical Phenomena  Abstract: We have derived new physical quantities for several High-Mass X-ray Binaries (HMXBs) with supergiant (SG) companions through their cyclotron lines. The parameters are: the terminal velocity of the wind, the mass loss rate of the donor, the effective temperature and the magnetic fields. These parameters influence significantly the improvement of the model of accretion. In spite of the variety of their observational properties, the corresponding magnetic field is around B ~ 10^12 G. This result can be constrained by the effects on stellar evolution. In addition, we have performed a segmentation in the parameter space of donors intended for several SG-HMXB listed in our sample set. The parameter space can be categorized into five regimes depending on the possibility of disk formation associated with accretion from the stellar wind. This can give a quantitative clarification of the observed variability and the properties of these objects. We show that, when these systems come into the direct accretion region, systems with corresponding parameters can emit X-rays.  
Temperature Distribution and Influence Mechanism on Large Reflector Antennas under Solar Radiation 期刊论文  OAI收割
RADIO SCIENCE, 2017, 卷号: 52, 期号: 10, 页码: 1253-1260
作者:  Duan, Y. H.;  Xu, Q.;  Wang, M.;  Zhu, M. B.;  Chen, G. D.
  |  收藏  |  浏览/下载：37/0  |  提交时间：2018/01/17
中国城镇化的热环境效应研究 学位论文  OAI收割
北京: 中国科学院大学, 2017
作者:  李元征
  |  收藏  |  浏览/下载：55/0  |  提交时间：2018/06/27
Extension of the Generalized Split-Window Algorithm for Land Surface Temperature Retrieval to Atmospheres With Heavy Dust Aerosol Loading SCI/SSCI论文  OAI收割
2015
作者:  Fan X. W.;  Tang, B. H.;  Wu, H.;  Yan, G. J.;  Li, Z. L.
收藏  |  浏览/下载：33/0  |  提交时间：2015/12/09
环渤海典型重金属的环境行为及模拟预警研究 学位论文  OAI收割
博士, 北京: 中国科学院研究生院, 2014
作者:  徐笠
收藏  |  浏览/下载：75/0  |  提交时间：2015/06/26