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1.
多型随机递归集关于统计自相似测度的Multifractal分解   总被引:2,自引:0,他引:2  
徐赐文 《数学年刊A辑》2000,21(1):109-122
本文构造了一类多型随机递归集K,并利用Falconer的方法[1]获得了K的重分形分解集Kα(α>0)的Hausdorff维数和Packing维数.  相似文献   

2.
设μ为支撑于随机递归结构K上的无穷乘积测度,K(ω)≠φ。本文研究K关于测度μ的重分形分解,并讨论了谱维f(α)的性质。  相似文献   

3.
统计自相似集的重分形分解   总被引:3,自引:0,他引:3  
余旌胡  胡迪鹤 《数学学报》2003,46(3):507-512
设K是由Graf定义的统计自相似集.本文构造了一支撑在K上的随机测 度p,并研究了结合P的K的重分形分解,得到了分形谱函数f(α)的表达式.  相似文献   

4.
本文讨论了一类广义的随机递归集的重分形性质,通过将其构造中的子集间的不重叠条件减弱到有限交性质,使得子集间允许适当重叠,同时保证递归集不为空集和其重分形维数计算仍具有明显的表达式.  相似文献   

5.
该文考虑广义Moran集的重分形分解问题,讨论了在不附加压缩尺度具有正的下界条件的情形下广义Moran集的重分形分解集的Hausdorff维数问题.  相似文献   

6.
随机分形   总被引:1,自引:0,他引:1  
胡迪鹤  刘禄勤 《数学进展》1995,24(3):193-214
本文概括了随机分形的主要结果,综述了随机分形的最新进展和目前的动态,提出了一些末解决的问题,全文共分为三部分:(1)由随机过程和随机场(如Levy过程,Gauss场,自相似过程等)产生的各种随机分形集(如象集、水平集、K重点集等)的Hausdorff维数、测度和packing维数、测试;(2)随机Cantor型集和统计自相似集的维数和测试;(3)分形集(如Spierpinski gasket,ne  相似文献   

7.
该文研究了一类简单对称随机漫步中的水平集的Hausdorff维数和packing维数, 这些水平集所对应的随机漫步以给定的频率回归原点.  相似文献   

8.
设ER2为一个分形集,lt(t∈R)为平行于x轴的直线,且在y轴上的截距为t;称E∩lt为E的水平截线集,本文研究了一些分形集的水平截线集的Hausdorff维数。  相似文献   

9.
胡慧  程珵 《数学杂志》2022,(2):180-188
本文研究了Lüroth展式字符乘积的部分和■的度量性质和相关分形集的Hausdorff维数,其中di(x)表示x∈(0,1)的Lüroth展式的第i个字符.利用对部分和序列的修正和适当分形集的构造,获得了Sn(x)/nlog2 n依勒贝格测度收敛于1/2并且得到了相关例外集的Hausdorff维数,扩展了数的展式的维数研究.  相似文献   

10.
龙伦海  黄玲  毕红兵 《数学学报》2011,54(1):137-146
本文给出了函数系矩阵的定义及运算,用函数系矩阵构造了分形完备簇,并确定了相似分形完备簇在开集条件下的Hausdorff维数和Box维数.  相似文献   

11.
To describe some fractal properties of a self-similar set or measure, such as the Hausdorff dimension and the multifractal spectrum, it is useful that it satisfy the strong open set condition, which means there is an open set satisfying the open set condition and, additionally, a part of the self-similar set must meet the open set. It is known that in the non-random case the strong open set condition and the open set condition are equivalent. This paper treats the random case. If the open set condition is assumed, we show that there is a random open set satisfying the strong open set condition. Further, we give an application to multifractal analysis of the random self-similar fractal.

  相似文献   


12.
We focus on the multifractal generalization of the centered Hausdorff measure and dimension. We analyze the correlation among different approaches to the definition of the multifractal exact dimension of locally finite and Borel regular measures on the basis of fractal analysis of essential supports of these measures. Using characteristic multifractal measures, we carry out the multifractal analysis of singular probability measures and prove theorems on the structural representation of these measures.  相似文献   

13.
Using Voiculescu's notion of a matricial microstate we introduce fractal dimensions and entropies for finite sets of selfadjoint operators in a tracial von Neumann algebra. We show that they possess properties similar to their classical predecessors. We relate the new quantities to free entropy and free entropy dimension and show that a modified version of free Hausdorff dimension is an algebraic invariant. We compute the free Hausdorff dimension in the cases where the set generates a finite-dimensional algebra or where the set consists of a single selfadjoint. We show that the Hausdorff dimension becomes additive for such sets in the presence of freeness.  相似文献   

14.
We study the Hausdorff dimension of Poissonian cutout sets defined via inhomogeneous intensity measures on Q-regular metric spaces. Our main results explain the dependence of the dimension of the cutout sets on the multifractal structure of the average densities of the Q-regular measure. As a corollary, we obtain formulas for the Hausdorff dimension of such cutout sets in self-similar and self-conformal spaces using the multifractal decomposition of the average densities for the natural measures.  相似文献   

15.
This paper studies fractal properties of polar sets for random string processes. We give upper and lower bounds of the hitting probabilities on compact sets and prove some sufficient conditions and necessary conditions for compact sets to be polar for the random string process. Moreover, we also determine the smallest Hausdorff dimensions of non-polar sets by constructing a Cantor-type set to connect its Hausdorff dimension and capacity.  相似文献   

16.
In recent years many deterministic parabolic equations have been shown to possess global attractors which, despite being subsets of an infinite-dimensional phase space, are finite-dimensional objects. Debussche showed how to generalize the deterministic theory to show that the random attractors of the corresponding stochastic equations have finite Hausdorff dimension. However, to deduce a parametrization of a ‘finite-dimensional’ set by a finite number of coordinates a bound on the fractal (upper box-counting) dimension is required. There are non-trivial problems in extending Debussche's techniques to this case, which can be overcome by careful use of the Poincaré recurrence theorem. We prove that under the same conditions as in Debussche's paper and an additional concavity assumption, the fractal dimension enjoys the same bound as the Hausdorff dimension. We apply our theorem to the 2d Navier–Stokes equations with additive noise, and give two results that allow different long-time states to be distinguished by a finite number of observations.  相似文献   

17.
The Hausdorff measure with fractional index is used in order to define a functional on measurable sets of the plane. A fractal set, constructed using the well-known Von Koch set, is involved in the definition. This functional is proved to arise as the limit of a sequence of classical functionals defined on sets of finite perimeter. Thus it is shown that a natural extension of the ordinary functionals of the calculus of variations leads both to fractal sets and to the fractional Hausdorff measure.  相似文献   

18.
For one‐dimensional simple symmetric random walk, the Hausdorff and packing dimensions of sets of sample paths with prescribed rate of returns to the origin are determined. This gives a multifractal decomposition of the underlying sample space. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)  相似文献   

19.
We have given several necessary and sufficient conditions for statistically self-similar sets and a.s. self-similar sets and have got the Hausdorff dimension and exact Hausdorff measure function of any a.s. self-similar set in this paper. It is useful in the study of probability properties and fractal properties and structure of statistically recursive sets.  相似文献   

20.
This paper provides an explicit formula for the Hausdorff measures of a class of regular homogeneous Moran sets. In particular, this provides, for the first time, an example of an explicit formula for the Hausdorff measure of a fractal set whose Hausdorff dimension is greater than 1.  相似文献   

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