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• 金属研究所 [10]
• 福建物质结构研究所 [3]
• 地质与地球物理研究所 [2]
• 长春光学精密机械与物... [2]
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• OAI收割 [23]

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• 期刊论文 [21]
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• 2020 [1]
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• Physics [1]

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浏览/检索结果: 共23条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity 期刊论文  OAI收割 Monthly Notices of the Royal Astronomical Society, 2020, 卷号: 497, 页码: 5498-5506 作者:  HXMT   |  收藏  |  浏览/下载：44/0  |  提交时间：2022/02/08 stars: neutron  pulsars: individual: Swift J0243.6+6124  X-rays:  binaries  Astrophysics - High Energy Astrophysical Phenomena  Abstract: Based on Insight-HXMT data, we report on the pulse fraction evolution during the 2017-2018 outburst of the newly discovered first Galactic ultraluminous X-ray (ULX) source Swift J0243.6+6124. The pulse fractions of 19 observation pairs selected in the rising and fading phases with similar luminosity are investigated. The results show a general trend of the pulse fraction increasing with luminosity and energy at supercritical luminosity. However, the relative strength of the pulsation between each pair evolves strongly with luminosity. The pulse fraction in the rising phase is larger at luminosity below 7.71 × 1038 erg s-1, but smaller at above. A transition luminosity is found to be energy independent. Such a phenomenon is first confirmed by Insight-HXMT observations and we speculate that it may have relation with the radiation-pressure-dominated accretion disc.   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：56/0  |  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.   Renormalization of the global quantum correlation and monogamy relation in the anisotropic Heisenberg XXZ model 期刊论文  OAI收割 QUANTUM INFORMATION PROCESSING, 2016, 卷号: 15, 期号: 1, 页码: 255-267 作者:  Qin, M;  Ren, ZZ;  Zhang, X;  Qin, M (reprint author), Nanjing Univ, Dept Phys, Hankou Rd 22, Nanjing 210093, Jiangsu, Peoples R China.;  Qin, M (reprint author), Nanjing Univ, Key Lab Modern Acoust, Hankou Rd 22, Nanjing 210093, Jiangsu, Peoples R China.   |  收藏  |  浏览/下载：22/0  |  提交时间：2017/10/13 Quantum Correlation  Monogamy Relation  Quantum Renormalization Group  Quantum Phase Transition   Renormalization of the global quantum correlation and monogamy relation in the anisotropic Heisenberg XXZ model 期刊论文  OAI收割 QUANTUM INFORMATION PROCESSING, 2016, 卷号: 15, 页码: 255-267 作者:  Qin, Meng;  Ren, Zhong-Zhou;  Zhang, Xin   |  收藏  |  浏览/下载：30/0  |  提交时间：2018/05/31 Quantum correlation  Monogamy relation  Quantum renormalization group  Quantum phase transition   Subsolidus phase relations of Dy-Fe-Al system 期刊论文  OAI收割 Powder Diffraction, 2011, 卷号: 26, 期号: 1, 页码: 41167 Y. Q. Chen; J. K. Liang; J. Luo; J. B. Li; G. H. Rao 收藏  |  浏览/下载：17/0  |  提交时间：2012/04/13 Dy-Fe-Al system  phase relation  X-ray diffraction  solid solution  dysprosium intermetallic phases  magnetic-properties  crystal-structures  compounds dyfe3  substitution  aluminum  dy2fe17  dy6fe23   The movement estimation of target and background by fourier phase spectrum difference (EI CONFERENCE) 会议论文  OAI收割 2010 6th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2010, September 23, 2010 - September 25, 2010, Chengdu, China 作者:  Zhang X.;  Zhang X.;  Zhang X.;  Wang J.;  Zhang S. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 An algorithm for estimating displacement of the moving target and background by shift theory of Fourier transform is presented. According to the relation between the change and the Fourier transform of image sequence  the method employs the displacement value of the moving target and background by the difference of Fourier phase spectrum. The algorithm estimates the movements from the whole field of the image with excellent global property. This paper provides the calculus and experiments of the algorithm which show the accuracy of 1 pixel. 2010 IEEE.   Subsolidus phase relationships in the system ZnO-V2O5-WO3 research on suitable flux for ZnO crystal growth 期刊论文  OAI收割 JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 卷号: 476, 期号: 1-2, 页码: 241-244 作者:  Chen, Xianzhi;  Chen, Dagui;  Lv, Peiwen;  Yan, Fengbo;  Zhan, Zhibing   |  收藏  |  浏览/下载：13/0  |  提交时间：2021/02/02 ZnO-V2O5-WO3 system  Zn4V2O9-ZnWO4 pseudo-binary system  Crystal growth  ZnO semiconductor  Phase relation   Subsolidus phase relationships in the system ZnO-V2O5-WO3 research on suitable flux for ZnO crystal growth 期刊论文  OAI收割 Journal of Alloys and Compounds, 2009, 卷号: 476, 期号: 1-2, 页码: 241-244 X. Z. Chen, D. G. Chen, P. W. Lv, F. B. Yan, Z. B. Zhan, B. Li, F. Huang and J. K. Liang 收藏  |  浏览/下载：13/0  |  提交时间：2012/11/06 ZnO-V2O5-WO3 system  Zn4V2O9-ZnWO4 pseudo-binary system  Crystal growth  ZnO semiconductor  Phase relation  single-crystals  v2o5-zno system  diagram  znv2o6   Subsolidus phase relationships in the system ZnO-V(2)O(5)-WO(3) research on suitable flux for ZnO crystal growth 期刊论文  OAI收割 Journal of Alloys and Compounds, 2009, 卷号: 476, 期号: 1-2, 页码: 241-244 X. Z. Chen; D. G. Chen; P. W. Lv; F. B. Yan; Z. B. Zhan; B. Li; F. Huang; J. K. Liang 收藏  |  浏览/下载：14/0  |  提交时间：2012/04/13 ZnO-V(2)O(5)-WO(3) system  Zn(4)V(2)O(9)-ZnWO(4) pseudo-binary system  Crystal growth  ZnO semiconductor  Phase relation  single-crystals  v2o5-zno system  diagram  znv2o6   The ternary system Na2O-ZnO-WO3: Compounds and phase relationships 期刊论文  OAI收割 Journal of Alloys and Compounds, 2008, 卷号: 458, 期号: 1-2, 页码: 138-143 F. B. Yan; D. G. Chen; W. Li; Z. Lin; Z. G. Zhao; L. P. Xue; F. Huang and J. K. Liang 收藏  |  浏览/下载：17/0  |  提交时间：2013/01/22 ZnO-Na2O-WO3 system  X-ray diffraction  phase relation  DTA  Na3.6Zn1.2(WO4)(3)  zno single-crystals  chemical-vapor transport  electrical-properties  hydrothermal growth  powder diffraction  zinc oxide  sodium