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合肥物质科学研究院 [10]
自动化研究所 [5]
地质与地球物理研究所 [4]
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期刊论文 [25]
学位论文 [2]
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Simultaneous Quantitative Analysis of Soil Heavy Metals As and Pb Based on Energy Dispersive XRF Spectroscopy
期刊论文
OAI收割
SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 卷号: 44
作者:
Ye, Zi-qi
;
Gan, Ting-ting
;
Wu, Wen-tao
;
Zhao, Nan-jing
;
Yin, Gao-fang
  |  
收藏
  |  
浏览/下载:9/0
  |  
提交时间:2024/11/20
X-ray fluorescence
Lead
Arsenic
Overlapping peak analysis
Simultaneous quantitative detection
Gaze Control for Active Visual SLAM via Panoramic Cost Map
期刊论文
OAI收割
IEEE TRANSACTIONS ON INTELLIGENT VEHICLES, 2023, 卷号: 8, 期号: 2, 页码: 1813-1825
作者:
Yuwen, Xuan
;
Zhang, Hui
;
Yan, Fengjun
;
Chen, Long
  |  
收藏
  |  
浏览/下载:16/0
  |  
提交时间:2023/11/17
Cameras
Costs
Visualization
Simultaneous localization and mapping
Task analysis
Phase change materials
Intelligent vehicles
Visual SLAM
active
panoramic
gaze control
Decoupling Adaptive Sliding Mode Observer Design for Wind Turbines Subject to Simultaneous Faults in Sensors and Actuators
期刊论文
OAI收割
IEEE/CAA Journal of Automatica Sinica, 2021, 卷号: 8, 期号: 4, 页码: 837-847
作者:
Hamed Habibi
;
Ian Howard
;
Silvio Simani
;
Afef Fekih
  |  
收藏
  |  
浏览/下载:30/0
  |  
提交时间:2021/04/09
Fault tolerant control
horizontal axis wind turbines
Monte-Carlo analysis
principle of separation
simultaneous faults
sliding mode observer
Simultaneous analysis of typical halogenated endocrine disrupting chemicals and metal(loid)s in human hair
期刊论文
OAI收割
SCIENCE OF THE TOTAL ENVIRONMENT, 2020, 卷号: 718, 页码: 10
作者:
Ren, Mengyuan
;
Jia, Xiaoqian
;
Shi, Jiazhang
;
Yan, Lailai
;
Li, Zewu
  |  
收藏
  |  
浏览/下载:69/0
  |  
提交时间:2020/05/19
Hair
Simultaneous analysis
Endocrine disrupting chemicals
Metal(loid)s
Exposome
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:59/0
  |  
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.
Timing analysis of Swift J1658.2-4242's outburst in 2018 with Insight-HXMT, NICER and AstroSat
期刊论文
OAI收割
Journal of High Energy Astrophysics, 2019, 卷号: 24, 页码: 30-40
作者:
HXMT
  |  
收藏
  |  
浏览/下载:57/0
  |  
提交时间:2022/02/08
Accretion
accretion disks
Black hole physics
X-rays: binaries:
Swift J1658.2-4242
Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present the observational results from a detailed timing analysis of the black hole candidate Swift J1658.2-4242 during its 2018 outburst with the observations of Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star Interior Composition Explorer (NICER) and AstroSat in 0.1-250 keV. The evolution of intensity, hardness and integrated fractional root mean square (rms) observed by Insight-HXMT and NICER are presented in this paper. Type-C quasi-periodic oscillations (QPOs) observed by NICER (0.8-3.5 Hz) and Insight-HXMT (1-1.6 Hz) are also reported in this work. The features of the QPOs are analyzed with an energy range of 0.5-50 keV. The relations between QPO frequency and other characteristics such as intensity, hardness and QPO rms are carefully studied. The timing and spectral properties indicate that Swift J1658.2-4242 is a black hole binary system. Besides, the rms spectra of the source calculated from the simultaneous observation of Insight-HXMT, NICER and AstroSat support the Lense-Thirring origin of the QPOs. The relation between QPO phase lag and the centroid frequency of Swift J1658.2-4242 reveals a near zero constant when < 4Hz and a soft phase lag at 6.68 Hz. This independence follows the same trend as the high inclination galactic black hole binaries such as MAXI J1659-152.
Stripping analysis of Pb(II), Cd(II), Hg(II) and Cu(II) based on irradiated attapulgite/Ionic liquid composites
期刊论文
OAI收割
CHEMICAL ENGINEERING JOURNAL, 2017, 卷号: 316, 页码: 383-392
作者:
Xiong, Shiquan
;
Xu, Juncui
;
Xie, Fazhi
;
Hu, Xianhai
;
Gong, Guohong
  |  
收藏
  |  
浏览/下载:26/0
  |  
提交时间:2018/07/26
Heavy Metal Ions
Individual And Simultaneous Detection
Stripping Analysis
Sensitivity And Detection Limit
Electroanalysis
Stripping analysis of Pb(II), Cd(II), Hg(II) and Cu(II) based on irradiated attapulgite/Ionic liquid composites
期刊论文
OAI收割
CHEMICAL ENGINEERING JOURNAL, 2017, 卷号: 316, 页码: 383-392
作者:
Xiong, Shiquan
;
Xu, Juncui
;
Xie, Fazhi
;
Hu, Xianhai
;
Gong, Guohong
  |  
收藏
  |  
浏览/下载:31/0
  |  
提交时间:2018/07/26
Heavy Metal Ions
Individual And Simultaneous Detection
Stripping Analysis
Sensitivity And Detection Limit
Electroanalysis