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§1 引言在非平衡态统计物理中,统计不可逆性与熵产生率是两个十分重要的概念.在[1]、[2]、[3]中,我们讨论了可以用马氏链描写的系统的可逆性与熵产生率,并证明一个平稳马氏链可逆的充分必要条件是熵产生率为零,进而又说明熵产生率是系统对时间的统计不可逆程度的一个刻划指标.但是,由于马氏链的状态空间的局限性,上述结果不能适应大量连续状态空间的物理问题研究的需要.为此,本文设法对一般的随机过程给出熵产生率的概率定义,并进而 相似文献
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从Reissner-Nordstrom时空背景下的Dirac方程出发,利用改进的brick-wall方法-膜模型,计算黑洞背景下Dirac场的自由能和熵,得到Dirac场的熵是由两部分组成的,根据熵是广延量的特性,由此推得作者所讨论了热力学系统应是由两个热力学子系统组成。在此基础上给出了新的Bekenstein-Smarr公式。结果表明,作者所定义的熵满足热力学第三定律。可视为黑洞的普朗克绝对熵。 相似文献
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《数学物理学报(A辑)》2003,23(1):70
从Reissner Nordstrom时空背景下的 Dirac 方程出发,利用改进的 brick wall 方法-膜模型,计算黑洞背景下Dirac场的自由能和熵.得到Dirac场的熵是由两部分组成的,根据熵是广延量的特性,由此推得作者所讨论的热力学系统应是由两个热力学子系统组成.在此基础上给出了新的Bekenstein Smarr公式.结果表明,作者所定义的熵满足热力学第三定律.可视为黑洞的普朗克绝对熵. 相似文献
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齐次Banach空间上的算子调和分析 总被引:1,自引:0,他引:1
于树模 《数学年刊A辑(中文版)》1988,(1)
本文讨论局部紧Abel群上齐次Banach空间上的算子的调和分析,首先引进一类所谓齐次Banach空间B上的右平移可积算子,对这类算子给出了它的Fourier变换定义,它可视为通常函数Fourier变换的拓广,主要结果有:1.B上右平移可积算子的Fourier变换按强算子拓扑C-1可和于算子本身,2.B上右平移可积算子的Fourier变换将乘法和卷积两种运算相互转换,3.B上右平移可积算子具有除l、2两条外的其他形式性质,这些性质类似于普通函数Fourier变换的性质。 相似文献
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屈荫生 《数学年刊A辑(中文版)》1983,(1)
本文定义了结局为模糊事件的随机试验的熵和信息量,将Shannon熵和信息推广到Fuzzy情形。讨论了模糊事件的熵和信息的基本性质。发现结局为模糊事件的随机试验的熵可分解为随机熵和模糊熵之和。找到了Shannon熵和Do Luca熵之间的联系。 相似文献
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Mathematical Notes - We study the initial boundary-value problem for three-dimensional systems of equations of pseudoparabolic type. The system is similar to the Oskolkov system, but differs from... 相似文献
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Yu. N. Lin'kov 《Journal of Mathematical Sciences》1991,53(4):409-415
We give a characterization of the types of asymptotic discernibility of families of hypotheses in the case of hypothetical measures that are not, in general, mutually absolutely continuous. The case when the logarithm of the likelihood ratio admits an asymptotic expansion of the type of an expansion with local asymptotic normality is examined in detail. Examples are studied.Translated fromTeoriya Sluchainykh Protsessov, Vol. 15, pp. 64–71, 1987. 相似文献
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S. V. Kerov 《Journal of Mathematical Sciences》1988,41(2):995-999
The asymptotic distribution of tensors of degree N in symmetry types is studied in this paper.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 155, pp. 181–186, 1986. 相似文献
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In this paper, we prove that any subreduct of the class of representable relation algebras whose similarity type includes
intersection, relation composition and converse is a non-finitely axiomatizable quasivariety and that its equational theory
is not finitely based. We show the same result for subreducts of the class of representable cylindric algebras of dimension
at least three whose similarity types include intersection and cylindrifications. A similar result is proved for subreducts
of the class of representable sequential algebras.
Received October 7, 1998; accepted in final form September 10, 1999. 相似文献
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Vladimir I. Arnold 《Functional Analysis and Other Mathematics》2009,2(2-4):151-164
Empirical study of the period’s length T of the continued fractions of $\sqrt{Q}$ (for growing integers Q) shows several strange asymptotical results, for instance, $T\leq C\sqrt{Q}\ln{Q}$ . These results show important differences between the statistics of the elements of the continued fractions of random real numbers and of square roots of random integers. 相似文献