中国科学院机构知识库网格系统: 检索

Disaster characteristics and mechanisms of the time-delayed rockburst development process in tunnels at 2500 m depth 期刊论文 OAI收割
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2025, 卷号: 159, 页码: 15
作者: Liu, Guofeng; Liu, Zhiqiang; Feng, Guangliang; Chen, Xueqi; Duan, Shuqian

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收藏 | 浏览/下载：15/0 | 提交时间：2025/06/27

Time-delayed rockburst Rockburst development process Microseismic monitoring Rock fracture Rockburst mechanism Tunnels

Role of Unloading Rate and Minimum Principal Stress on Fault Activation with Implication in Fault-Slip Rockburst 期刊论文 OAI收割
ROCK MECHANICS AND ROCK ENGINEERING, 2025, 页码: 24
作者: Wang, Wei; Meng, Fanzhen; Tian, Dongliang; Wen, Yuantao; Yue, Zhufeng

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收藏 | 浏览/下载：8/0 | 提交时间：2025/06/27

Fault-slip rockburst Unloading rate Fault activation Initial minimum principal stress Time-delayed failure

Time-delayed failure process of granite and its energy evolution and acoustic emission characteristics 期刊论文 OAI收割
ENGINEERING FAILURE ANALYSIS, 2024, 卷号: 157, 页码: 19
作者: Feng, Guangliang; Ma, Qi; He, Zhou; Su, Guoshao; Chen, Bingrui

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收藏 | 浏览/下载：10/0 | 提交时间：2025/06/27

True-triaxial unloading Time-delayed Failure processes Energy evolution AE

Experimental study on the failure characteristic and mechanism of granite time-delayed rockburst under true triaxial condition 期刊论文 OAI收割
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES, 2023, 卷号: 9, 期号: 1, 页码: 21
作者: Feng, Guang-liang; Ma, Qi; Lacidogna, Giuseppe; Pan, Peng-zhi; Wang, Zhao-feng

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收藏 | 浏览/下载：7/0 | 提交时间：2025/06/27

True triaxial Time-delayed rockburst Crack evolution characteristics Macro failure characteristics AE

Data Generation Feedback Relearning Control for Unmodeled Nonlinear Systems 期刊论文 OAI收割
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTATIONAL INTELLIGENCE, 2023, 页码: 12
作者: Zhang, Yong; Mu, Chaoxu; Zhao, Dongbin

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收藏 | 浏览/下载：28/0 | 提交时间：2023/11/16

Data models Real-time systems Heuristic algorithms Mathematical models Adaptation models Approximation algorithms Cost function Data generation model feedback relearning control delayed neural network reinforcement learning unmodeled nonlinear system

Plant phenology changes and drivers on the Qinghai-Tibetan Plateau 期刊论文 OAI收割
Nature Reviews Earth & Environment, 2022, 卷号: 3, 期号: 10, 页码: 633-651
作者: Miaogen Shen; Shiping Wang; Nan Jiang; Jianping Sun; Ruyin Cao

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收藏 | 浏览/下载：58/0 | 提交时间：2022/10/25

Vegetation Green-up Land-surface Phenology Delayed Spring Phenology Time-series Data Climate-change Nitrogen Addition Autumn Phenology Carbon Uptake Reproductive Phenology Altitudinal Gradient

Finite Analysis of Support Time for Tunnels in Strain-softening Rock Mass in Consideration of Fictitious Support Pressure 期刊论文 OAI收割
Journal of Physics: Conference Series, 2021, 卷号: 2068, 期号: 1
作者: Cui,Lan; Sheng,Qian; Niu,Zhenzhen

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收藏 | 浏览/下载：112/0 | 提交时间：2022/01/05

Fictitious pressure strain-softening rock mass support time delayed distance allowable deformation

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：70/0 | 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.

Identifying topologies and system parameters of uncertain time-varying delayed complex networks 期刊论文 OAI收割
SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2019, 卷号: 62, 期号: 1, 页码: 94-105
作者: Wang Xiong; Gu HaiBo; Wang QianYao; Lu JinHu

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收藏 | 浏览/下载：50/0 | 提交时间：2019/04/02

system parameters and network topologies identification anticipatory synchronization uncertain time-varying delayed complex networks noise-perturbed complex networks

Formation of Subwavelength Periodic Triangular Arrays on Tungsten through Double-Pulsed Femtosecond Laser Irradiation 期刊论文 OAI收割
Materials, 2018, 卷号: 11, 期号: 12, 页码: 9
作者: Qiao, H. Z.; Yang, J. J.; Li, J.; Liu, Q.; Liu, J.

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收藏 | 浏览/下载：30/0 | 提交时间：2019/09/17

time-delayed femtosecond lasers orthogonal polarizations subwavelength triangular structures tungsten surface-structures photonic crystals fabrication nanostructures lithography plasmonics Materials Science