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INVERSE ELASTIC SCATTERING FOR A RANDOM POTENTIAL\ast 期刊论文 OAI收割
SIAM JOURNAL ON MATHEMATICAL ANALYSIS, 2022, 卷号: 54, 期号: 5, 页码: 5126-5159
作者: LI, Jianliang; LI, Peijun; Wang, Xu

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收藏 | 浏览/下载：26/0 | 提交时间：2023/02/07

inverse scattering problem elastic wave equation generalized Gaussian random field pseudodifferential operator principal symbol uniqueness

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

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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.

A tunable blue random laser based on solid waveguide gain films with plasmonics and scatters 期刊论文 OAI收割
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 卷号: 790, 页码: 558-562
作者: Li, Xueyang; Guo, Jingwei; Yuan, Hong; Lv, Qipeng; Hu, Shu

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收藏 | 浏览/下载：127/0 | 提交时间：2019/06/20

Blue random laser Localized surface-plasmon resonance Multiple scattering Tunable

A lotus leaf based random laser 期刊论文 OAI收割
ORGANIC ELECTRONICS, 2019, 卷号: 69, 页码: 216-219
作者: Li, Xueyang; Gong, Faquan; Liu, Dong; He, Shan; Yuan, Hong

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收藏 | 浏览/下载：76/0 | 提交时间：2019/06/25

Random laser Lotus leaf Multiple scattering Tunable

Concentration-of-Measure Theory for Structures and Fluctuations of Waves 期刊论文 OAI收割
PHYSICAL REVIEW LETTERS, 2018, 卷号: 121, 期号: 14, 页码: 140603
作者: Fang, P; Zhao, LY; Tian, CS

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收藏 | 浏览/下载：89/0 | 提交时间：2018/12/27

UNIVERSAL CONDUCTANCE FLUCTUATIONS RANDOM-MATRIX THEORY STATISTICAL-MECHANICS DISORDERED CONDUCTORS MULTIPLE-SCATTERING QUANTUM CHAOS TRANSMISSION THERMALIZATION DIFFUSION SYSTEMS

Nonlinear Model for InSAR Baseline Error 期刊论文 OAI收割
IEEE Transactions on Geoscience and Remote Sensing, 2016, 卷号: 54, 期号: 9, 页码: 5341-5351
作者: Liu, Guang; Hanssen, Ramon F.; Guo, Huadong; Yue, Huanyin; Perski, Zbigniew

收藏 | 浏览/下载：73/0 | 提交时间：2017/04/24

RANDOM ROUGH-SURFACE ELECTROMAGNETIC SCATTERING SOIL SURFACES NUMERICAL-SIMULATION MAXWELL EQUATIONS LAYERED MEDIA GRID METHOD BACKSCATTERING LIGHT WAVES

An all-season sample database for improving land-cover mapping of Africa with two classification schemes 期刊论文 OAI收割
International Journal of Remote Sensing, 2016, 卷号: 37, 期号: 19, 页码: 4623-4647
作者: Li, Congcong; Gong, Peng; Wang, Jie; Yuan, Cui; Hu, Tengyun

收藏 | 浏览/下载：63/0 | 提交时间：2017/04/24

RANDOM ROUGH SURFACES SEA-SURFACE ELECTROMAGNETIC SCATTERING POLARIZATION-RATIO APERTURE RADAR LINEAR-SYSTEMS GPS SIGNALS ALGORITHM MODEL BACKSCATTERING

Random Lasing with a High Quality Factor over the Whole Visible Range Based on Cascade Energy Transfer 期刊论文 OAI收割
ADVANCED OPTICAL MATERIALS, 2014, 卷号: 2, 期号: 1, 页码: 88-93
作者: Zhang, YY (张永毅)

收藏 | 浏览/下载：42/0 | 提交时间：2014/12/01

RANDOM LASER NANOWIRES LIGHT SCATTERING EMISSION

Conjugated Polymer-Titania Nanoparticle Hybrid Films: Random Lasing Action and Ultrasensitive Detection of Explosive Vapors 期刊论文 OAI收割
JOURNAL OF PHYSICAL CHEMISTRY B, 2010, 卷号: 114, 期号: 13, 页码: 4725-4730
Deng, CM; He, QG; He, C; Shi, LQ; Cheng, JG; Lin, T

收藏 | 浏览/下载：22/0 | 提交时间：2011/12/17

CHEMICAL SENSORS RANDOM LASERS EMISSION TNT AMPLIFICATION SCATTERING FEEDBACK MEDIA

Random lasing in a dye doped cholesteric liquid crystal polymer solution 期刊论文 OAI收割
OPTICAL MATERIALS, 2008, 卷号: 31, 期号: 2, 页码: 375-379
作者: He, Benqiao; Liao, Qing; Huang, Yong

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收藏 | 浏览/下载：26/0 | 提交时间：2019/04/09

Cellulose Cholesteric Liquid Crystal Polymer Optical Scattering Random Lasing Rhodamine 6g