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浏览/检索结果: 共56条，第1-10条 帮助

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Wave-equation-based time-lapse seismic inversion by using dynamic time warping and scattering theory 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2023, 卷号: 66, 期号: 4, 页码: 1681
作者:  Wei ShuYing;  Chen XiaoHong;  Li JingYe;  Huang GuangTan
  |  收藏  |  浏览/下载：12/0  |  提交时间：2023/08/02
Convergence of the uniaxial PML method for time-domain electromagnetic scattering problems 期刊论文  OAI收割
ESAIM-MATHEMATICAL MODELLING AND NUMERICAL ANALYSIS-MODELISATION MATHEMATIQUE ET ANALYSE NUMERIQUE, 2021, 卷号: 55, 期号: 5, 页码: 2421-2443
作者:  Wei, Changkun;  Yang, Jiaqing;  Zhang, Bo
  |  收藏  |  浏览/下载：25/0  |  提交时间：2022/04/02
Long-Time Asymptotics for the Focusing Hirota Equation with Non-Zero Boundary Conditions at Infinity Via the Deift-Zhou Approach 期刊论文  OAI收割
MATHEMATICAL PHYSICS ANALYSIS AND GEOMETRY, 2021, 卷号: 24, 期号: 2, 页码: 37
作者:  Chen, Shuyan;  Yan, Zhenya;  Guo, Boling
  |  收藏  |  浏览/下载：49/0  |  提交时间：2021/06/01
Nucleic Acids Analysis 期刊论文  OAI收割
SCIENCE CHINA-CHEMISTRY, 2021, 卷号: 64, 期号: 2, 页码: 171-203
作者:  Zhao, YX;  Zuo, XL;  Li, Q;  Chen, F;  Chen, YR
  |  收藏  |  浏览/下载：73/0  |  提交时间：2021/09/06
Invariance Principle for Wave Propagation inside Inhomogeneously Disordered Materials 期刊论文  OAI收割
PHYSICAL REVIEW LETTERS, 2020, 卷号: 124, 期号: 5, 页码: 57401
作者:  Huang, Yiming;  Tian, Chushun;  Gopar, Victor A.;  Fang, Ping;  Genack, Azriel
  |  收藏  |  浏览/下载：37/0  |  提交时间：2020/06/16
CONVERGENCE ANALYSIS OF THE PML METHOD FOR TIME-DOMAIN ELECTROMAGNETIC SCATTERING PROBLEMS 期刊论文  OAI收割
SIAM JOURNAL ON NUMERICAL ANALYSIS, 2020, 卷号: 58, 期号: 3, 页码: 1918-1940
作者:  Wei, Changkun;  Yang, Jiaqing;  Zhang, Bo
  |  收藏  |  浏览/下载：22/0  |  提交时间：2020/09/23
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：58/0  |  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.  
Langevin dynamics with energy dissipation on periodic lattice structures modeling as an equivalent two-body method for atom-surface interactions 期刊论文  OAI收割
MATERIALS RESEARCH EXPRESS, 2019, 卷号: 6, 期号: 12, 页码: 125507
作者:  Zeng DD(曾丹丹);  Liu C(刘崇);  Jiang JZ(蒋建政);  Fan J(樊菁)
  |  收藏  |  浏览/下载：77/0  |  提交时间：2019/12/17
Novel Soft-Pion Theorem for Long-Range Nuclear Parity Violation 期刊论文  OAI收割
PHYSICAL REVIEW LETTERS, 2018, 卷号: 120, 期号: 18, 页码: 181801
作者:  Feng, X;  Guo, FK;  Seng, CY
  |  收藏  |  浏览/下载：43/0  |  提交时间：2018/12/27
Polarimetric MDS of pedestrian 期刊论文  OAI收割
ELECTRONICS LETTERS, 2018, 卷号: 54, 期号: 17, 页码: 1051-1052
作者:  Kang, Wenwu;  Zhang, Yunhua;  Dong, Xiao;  Kang, WW (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, CAS Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.
  |  收藏  |  浏览/下载：33/0  |  提交时间：2018/10/12