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根据广义乌龟坐标变换法(GTCT),对动态Kerr-Newman-de sitter黑洞的热辐射机制进行了研究.首先,利用在弯曲时空中描述自旋为0,质量为m的标量粒子的动力学方程(Klein-Gordon方程),再通过2种不同广义Tortoise坐标变换,最终得到了动态Kerr-Newman-de sitter黑洞在这2种不同情况下的热辐射谱,以及各自在事件视界处的霍金温度.通过对比研究发现,在2...
Contrôle impulsionnel appliqué à la gestion de changement de technologie dans une entreprise
impulse moments switching technology infinite horizon
2010/4/27
We consider an impulse control problem in infinite horizon applied with switching technology. We suppose that the firm decides at certain moments (impulse moments) to switch technology, leading to a j...
We construct an instanton describing the pair production of non-Kaluza Klein bubbles of nothing in higher odd dimensional de Sitter spaces. In addition to showing that higher dimensional de Sitter spa...
Allocation d'actifs selon le critère de maximisation des fonds propres économiques en assurance non-vie
maximization criterion non-life insurance company expected value
2010/4/27
The economic equities maximization criterion (MFPE) leads to the choice of financial portfolio, which maximizes the ratio of the expected value of the insurance company on the capital. This criterion ...
Shubnikov-de Haas Oscillations in Digital Magnetic Heterostructures
Shubnikov-de Haas Oscillations Digital Magnetic Heterostructures
2010/10/21
In this paper we theoretically investigate the magnetic-field and temperature dependence of the Shubnikov-de Haas oscillations in group II-VI modulation-doped Digital Magnetic Heterostructures. We sel...