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| 1 | TEMPERATURE DEPENDENCE OF VISCOSITY OF Al-Si ALLOY MELTS显示文摘The relationship between the viscosity and temperature of Al-Si alloy melts was investigated. The viscosity of three different types of Al-Si alloy melts was measured. It was showed that the relationship between the viscosity and temperature of hypoeutectic Al-5%Si and eutectic Al- 12.5%Si alloy melts is approximately exponential except for some special zones, but that of the hypereutectic melt is different. The paper discussed the correlation of the viscosity and atomic density, which is thought that the viscosity corresponds to the atomic density to some extent. | H.R.Geng R.Wang Z.X.Yang J.H.Chen C.J.Sun Y.Wang | 2005 | Acta Metallurgica Sinica(English Letters)2005，18，2： | 1 |
| 2 | Chemisorption on ZnO/A_xB_(1-x) Composite Systems显示文摘The chemisorption energy of hydrogen on semiconductor/alloy composite substrates are investigated. (?)g the conplex-energy-plane integration approach. The electronic properties of the substrate are described by using the Green function method within the framework of the tight-binding approximation. The coherent potential approximation (CPA) is used to deal with the alloys. specific calculations are performed for the H-ZnO/Ni_xCu_(1-x) and H-ZnO/Ag_xpd_(1-x) systems. | Z.X.Yang and T.ZhangDepartment of physics, Henan Normal University & Henan Foundational and Applied Science Institute, Xinxiang, Henan 453002, People’s Republic of China | 1991 | 信阳师范学院学报(自然科学版)1991，4，3： | 0 |
| 3 | Spectral and Timing Analysis of the Black Hole Transient MAXI J1631–479 During its 2019 Outburst Observed with Insight-HXMT显示文摘We report spectral and timing analysis of the black hole transient MAXI J1631–479 during the hard intermediate state of its 2019 outburst from the Insight-Hard X-ray Modulation Telescope(Insight-HXMT)observations.We find that the energy dependence of the type-C quasi-periodic oscillation(QPO)frequency evolves with time:during the initial rise of a small flare(~MJD 58526.0-58527.1),the QPO frequency increases with increasing energy from~1 to~100 ke V,and then the frequency remains constant after MJD 58527.1.We discover a possible new phenomenon of Fe line’s QPO frequency jump that has never been observed for other black hole transients:during the small flare,the QPO frequency around the Fe line energy is higher than any other energy band,with the frequency difference Δf=0.25±0.08 Hz between 5.5–7.5 ke V and other energy bands.The spectral analysis shows that the evolution of QPOs is related to the equivalent width of the narrow Fe line,and its equivalent width increases during this small flare.We propose that the QPO frequency difference results from the differential precession of a vertically extended jet,and the higher QPO frequency of Fe line could be caused by the layered jet when the jet scale increases.At the same time,the evolution of QPOs is related to the accretion rate,while the energy dependence of QPOs supports the existence of deceleration in the vertically distributed jet. | Yu-Cong Fu L.M.Song G.Q.Ding S.N.Zhang J.L.Qu S.Zhang L.Zhang Q.C.Bu Y.Huang X.Ma Z.X.Yang Y.L.Tuo X.F.Lu D.K.Zhou B.Y.Wu T.M.Li Y.C.Xu | 2022 | Research in Astronomy and Astrophysics2022，22，11： | 0 |
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