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A New Set of Parameters of High-Mass X-ray Binaries Found with their Cyclotron Lines 期刊论文  OAI收割
arXiv e-prints, 2018
作者:  
Zhang, Chengmin;  Taani, Ali;  Chaty, Sylvain;  Karino, Shigeyuki;  Song, Liming
  |  收藏  |  浏览/下载:85/0  |  提交时间:2019/07/12
Astrophysics - High Energy Astrophysical Phenomena  Abstract: We have derived new physical quantities for several High-Mass X-ray Binaries (HMXBs) with supergiant (SG) companions through their cyclotron lines. The parameters are: the terminal velocity of the wind, the mass loss rate of the donor, the effective temperature and the magnetic fields. These parameters influence significantly the improvement of the model of accretion. In spite of the variety of their observational properties, the corresponding magnetic field is around B ~ 10^12 G. This result can be constrained by the effects on stellar evolution. In addition, we have performed a segmentation in the parameter space of donors intended for several SG-HMXB listed in our sample set. The parameter space can be categorized into five regimes depending on the possibility of disk formation associated with accretion from the stellar wind. This can give a quantitative clarification of the observed variability and the properties of these objects. We show that, when these systems come into the direct accretion region, systems with corresponding parameters can emit X-rays.  
Research and development on the valve-less piezoelectric pump with unsymmetrical corrugation chamber bottom (EI CONFERENCE) 会议论文  OAI收割
2006 IEEE International Conference on Information Acquisition, ICIA 2006, August 20, 2006 - August 23, 2006, Weihai, Shandong, China
作者:  
Zhang J.;  Li D.;  Zhang J.;  Zhang J.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
The valve-less piezoelectric pump is more suitable for minimization and microminiaturization than the valve piezoelectric pump  especially for the Microelectromechanical System (MEMS) because of its simple structure. However  in order to control the flow direction of the fluid through the pump  some assembles have to be attached outside the chamber. And it is no doubt that these assembles will take some space and hinder its further microminiaturization. In this paper  a novel valve-less piezoelectric pump with unsymmetrical corrugation chamber bottom (UCCB) is presented. It ingeniously takes advantage of the space of the chamber by developing its bottom into a unsymmetrical corrugation shape along the axis of the inlet and outlet. As a result  a series of diffuse pipes and nozzle pipes (or wedge-shaped pipes)  which substitute the regular diffuse/nozzle elements fitted outside the chamber  are alternatively formed between the unsymmetrical corrugation chamber bottom (UCCB) and the piezoelectric vibrator. The piezoelectric vibrator is opposite to the UCCB. And these diffuse pipes and nozzle pipes are able to force the fluid in the chamber to flow along a single direction when the pump works. And then the mathematic model is established to present the relationship between the mean energy loss and the flow rate of the pump. Basing on the mathematic model  the theory on the pump working is analysed. Finally  a real UCCB valve-less piezoelectric pump is manufactured  and the test with it is carried out to verify the theory above-mentioned. 2006 IEEE.  
Ultrafast dynamics in ZnO thin films irradiated by femtosecond lasers 期刊论文  OAI收割
solid state commun., 2005, 卷号: 136, 期号: 7, 页码: 389, 394
Li CB; 冯东海; 贾天卿; Sun HY; Li XX; Xu SZ; Wang XF; 徐至展
收藏  |  浏览/下载:1982/65  |  提交时间:2009/09/18
The effect of high Landau subbands filling on the hot-electron magneto-transport ultrafast transient in InSb 期刊论文  OAI收割
PHYSICA B, 1999, 卷号: 269, 期号: 1, 页码: 28-33
Caetano, EWS; Mendes, EA; Freire, VN; da Costa, JAP; LEI, XL(雷啸霖)(雷啸霖)
收藏  |  浏览/下载:21/0  |  提交时间:2012/03/25