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The solutions of the Dirac equation Dear the black hole event horizon and the univers horizon in Vaidya-Schwarzschild-de Sitter space-time are given in this paper. Both the temperature of the Hawking radi-ation and the location of the evaporating black hole horizon and the universe horizon are determined exactly. 相似文献
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The general solutions to the Wess-Zumino(wZ) conditions in higher even dimensions are given. For odd dimensional cases we find no nontrivial solutions. 相似文献
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It is shown that the prolongation structure theory for nonlinear (evolution) equations with two independent variables can be generalized to the systems with many independent variables. By means of the nonlinear realization theory of gauge symmetries, the fundamental equations for prolongation structures and the requirements for the generalized Lax representations of the nonlinear systems in higher dimensions have been given. Based upon the invariances of the prvlongation structures or the generalized Lax representation under certain transformations, the general condition satisfied by the auto-Backlund transformations has been proposed and searching for a kind of auto-Backlund transformations has been transferred to solving the regular Riemann-Hilbert problem. 相似文献
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STATIC SPHERICALLY SYMMETRIC SOLUTION OF EINSTEIN GRAVITY COUPLED TO ELECTRO-MAGNETIC AND SCALAR FIELDS 下载免费PDF全文
The static spherically symmetric solution of Einstein gravity coupled to electromagnetic and scalar fields is obtained under the consideration of the self-gravitational interaction of the electromagnetic and scalar fields, which is singularity-free and stable. 相似文献
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对一些需要作近似计算了物理方程(非线性方程,超越方程等)用解析方法确定根所在区间,采用X=φ(X)的形式进行迭代计算。 相似文献
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《Journal of Nonlinear Mathematical Physics》2013,20(2):269-278
We obtain in terms of the Weierstrass elliptic ?-function, sigma function, and zeta function an explicit parametrized solution of a particular nonlinear, ordinary differential equation. This equation includes, in special cases, equations that occur in the study of both homogeneous and inhomogeneous cosmological models, and also in the dynamic Bose–Einstein condensates–cosmology correspondence, for example. 相似文献
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非结构网格在平面叶栅内湍流流动数值模拟中的应用 总被引:1,自引:1,他引:1
1控制方程和离散方程对二维非定常可压缩粘性流体,雷诺时均Navierstokes方程可写成如下积分形式:式中,0为计算区域;*D为区域边界;Q为守恒变量;F为通量,包括无粘通量F’和粘性通量F”。计算域采用三角形单元离散,三角形的边作为控制体边界,物理量置于单元中心。对每个三角形控制体,方程(1)可写成:·其中,Q;表示单元的守恒变量值;aC和Vi分别表示控制体的边界和面积,为计算式(2中右端值,将单元所有边界通量相加,最后可得如下方程:式中k(i)为单元边界,只,j为通过单元界面的通量,凸马为界面长度。2无粘通量本文采… 相似文献
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本文讨论了调和映射理论中Euler方程的解以及解与解之间的关系。并以此观点出发,研究了Ernst方程和该方程的解。
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本文分析了四方晶系所属的68个空间群,对于不对称单位含有一个重原子的情况,获得了导致轻原子位置多解的重原子可能位置、赝对称性、轻原子多解形式、衍射结构振幅分量的分布规律以及由轴的等价性质产生的附加赝消光。
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谭维翰 《核聚变与等离子体物理》1985,(2)
众所周知,将玻耳兹曼积分应用于等离子体,由于忽略了集体效应,导致积分对数发散。另外,Balescu-Lenard碰撞理论考虑了集体效应,克服了k→0对数发散困难,但又有k→0积分发散。对于等离子体参量g=1/nλD~3《1情形,文[4]已得出克服k→0积分发散的方法。但对g≥1情形,k→0积分发散问题仍未解决。本文改进了粒子分布函数展开求得包括g<1及g≥1在内的一般情形即南k→0与k→0均收敛的碰撞积分。 相似文献
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高维时空中Schwarzschild度规和Reissner-Nordstr?m度规的系数g00与g11都满足关系式g00g11=-1。本文考虑这个度规系数的关系式在荷电球体内部成立,而且假设电荷密度σ=σ0rbe-λ(r)/2的情况下,给出高维球对称时空中静态荷电的一个精确内解。 相似文献
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严格解出了一种既荷电又荷磁,且电荷密度与磁荷密度之比为常量的静止球对称天体的共形平直内解. 相似文献