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Search Results: 1 - 10 of 39077 matches for " JIA Ji-rong "
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Acceleration of particles in Einstein-Maxwell-Dilaton black hole
Pu-Jian Mao,Ran Li,Lin-Yu Jia,Ji-Rong Ren
Physics , 2010,
Abstract: It has been recently pointed out that, under certain conditions, the energy of particles accelerated by black holes in the center-of-mass frame can become arbitrarily high. In this Letter, we study the collision of two particles around the four-dimensional Kaluza-Klein black hole in Einstein-Maxwell-Dilaton theory. We find that the center-of-mass energy for a pair of colliding particles is unlimited at the horizon of charged nonrotating and extremal rotating Kaluza-Klein black hole.
Experiment and application of parameter-induced stochastic resonance in an over-damped random linear system

Jiang Shi-Qi,Hou Min-Jie,Jia Chun-Hu,He Ji-Rong,Gu Tian-Xiang,

中国物理 B , 2009,
Abstract: This paper investigates the parameter-induced stochastic resonance using experimental methods in an over-damped random linear system with asymmetric dichotomous noise. Non-monotonic dependence of signal-to-noise ratio on the system parameter is observed. Several potential applications of parameter-induced stochastic resonance are given in circuits.
Chemical Constituents from Twigs of Aglaia testicularis C. Y. Wu
马肾果枝条的化学成分研究(英文)

XIA Ying,JIA Ji-rong,WANG Zhe,YANG Shu-min,
夏颖
,贾继荣,王喆,杨淑敏

热带亚热带植物学报 , 2013,
Abstract: 采用多种色谱方法从马肾果(Aglaia testicularis C.Y.Wu)枝条中分离鉴定了11个化合物,分别是火焰花内酯B(1)、火焰花内酯苷A(2)、(E)-aglawone(3)、eichlerianic acid(4)、shoreic acid(5)、3β-羟基-5α,8α-表-二氧麦角-6,22-二烯(6)、豆甾-5-烯-3β,7α-二醇(7)、β-谷甾醇(8)、胡萝卜苷(9)、东莨菪内酯(10)、碳二十六酸(11)。化合物1~3,8~11均为首次从该植物中分离得到,而松香烷二萜内酯类衍生物1和2则是首次从米仔兰属植物中得到。化合物1对人肺癌细胞株AGZY 83-a表现出弱的抑制作用,IC50值为20.5μg mL-1。这为国产米仔兰属植物的开发应用提供了理论依据。
The topological structure of the integral quantum Hall effect in magnetic semiconductor-superconductor hybrids

Ren Ji-Rong,Zhu Hui,

中国物理 B , 2009,
Abstract: An unconventional integer quantum Hall regime was found in magnetic semiconductor-superconductor hybrids. By making use of the decomposition of the gauge potential on a $U(1)$ principal fibre bundle over $k$-space, we study the topological structure of the integral Hall conductance. It is labeled by the Hopf index $\beta$ and the Brouwer degree $\eta$. The Hall conductance topological current and its evolution is discussed.
Topological aspects in a two-component Bose condensed system in neutron star

Ren Ji-Rong,Guo Heng,

中国物理 B , 2009,
Abstract: By making use of Duan--Ge's decomposition theory of gauge potential and the topological current theory proposed by Prof.\ Duan Yi-Shi, we study a two-component superfluid Bose condensed system, which is supposed to be realized in the interior of neutron stars in the form of the coexistence of a neutron superfluid and a protonic superconductor. We propose that this system possesses vortex lines. The topological charges of the vortex lines are characterized by the Hopf indices and the Brower degrees of $\phi$-mapping.
Topological aspects in a two component Bose condensed system in neutron star
Heng Guo,Ji-Rong Ren
Physics , 2009, DOI: 10.1088/1674-1056/18/8/043
Abstract: By making use of Duan-Ge's decomposition theory of gauge potential and the Duan's topological current theory proposed by Prof. Duan Yi-Shi, we study a two component superfluid Bose condensed system, which is supposed being realized in the interior of neutron stars in the form of a coexistent neutron superfluid and protonic superconductor. We propose that this system possesses vortex lines. The topological charge of the vortex lines are characterized by the Hopf indices and the Brower degrees of $\phi$-mapping.
Unified First Law and Thermodynamics of Dynamical Black Hole in n-dimensional Vaidya Spacetime
Ji-Rong Ren,Ran Li
Physics , 2007, DOI: 10.1142/S0217732308028831
Abstract: As a simple but important example of dynamical black hole, we analysis the dynamical black hole in $n$-dimensional Vaidya spacetime in detail. We investigated the thermodynamics of field equation in $n$-dimensional Vaidya spacetime. The unified first law was derived in terms of the methods proposed by Sean A Hayward. The first law of dynamical black hole was obtained by projecting the unified first law along the trapping horizon. At last, the second law of dynamical black hole is also discussed.
Corrections to Hawking-like Radiation for a Friedmann-Robertson-Walker Universe
Tao Zhu,Ji-Rong Ren
Physics , 2008, DOI: 10.1140/epjc/s10052-009-1044-9
Abstract: Recently, a Hamilton-Jacobi method beyond semiclassical approximation in black hole physics was developed by \emph{Banerjee} and \emph{Majhi}\cite{beyond0}. In this paper, we generalize their analysis of black holes to the case of Friedmann-Robertson-Walker (FRW) universe. It is shown that all the higher order quantum corrections in the single particle action are proportional to the usual semiclassical contribution. The corrections to the Hawking-like temperature and entropy of apparent horizon for FRW universe are also obtained. In the corrected entropy, the area law involves logarithmic area correction together with the standard inverse power of area term.
Quasinormal Modes of Self-Dual Warped AdS$_3$ Black Hole in Topological Massive Gravity
Ran Li,Ji-Rong Ren
Physics , 2010, DOI: 10.1103/PhysRevD.83.064024
Abstract: We consider the various perturbations of self-dual warped AdS$_3$ black hole and obtain the exact expressions of quasinormal modes by imposing the vanishing Dirichlet boundary condition at asymptotic infinity. It is expected that the quasinormal modes agree with the poles of retarded Green's functions of the dual CFT. Our results provide a quantitative test of the warped AdS/CFT correspondence.
Dirac particles tunneling from BTZ black hole
Ran Li,Ji-Rong Ren
Physics , 2008, DOI: 10.1016/j.physletb.2008.01.077
Abstract: We calculated the Dirac Particles' Hawking radiation from the outer horizon of BTZ black hole via tunneling formalism. Applying WKB approximation to the Dirac equation in (2+1) dimensional BTZ spacetime background, we obtain the radiation spectrum for fermions and Hawking temperature of BTZ black hole. The results obtained by taking the fermion tunneling into account is consistent with the previous literatures.
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