The packing measure of a class of generalized sierpinski carpet

For 1/4 ＜ a ＜√2/4, let S1(x) = ax, S2(x) = 1 - a ax, x ∈ [0,1]. Ca is the attractor of the iterated function system {S1, S2}, then the packing measure of Ca × Ca is Ps(a)(Ca × Ca) = 4.2s(a)(1 - a)s(a),where s(a) = -loga4.     

经典分形集测度上估的计算机搜索Ⅱ──对典型例子Sierpinski垫片计数技术和格点跟踪技术的剖析

A upper estimate function ν(x) of Hausdorff measure Hs (S) ofSierpinski Gasket is given. A mathematical representation of the upperapproximate value νN (x) to ν(x) and a simple algorithm ofνN (x) based on lattice tracing technique are also derived. As asimple corollary, the estimation Hs(S)≤ min ν15 (n·10-5)=ν15 (0.50783)=0.81794 …is obtained.     

Sierpinski垫片上分形插值函数的最值问题

利用调和函数的特性,研究了Sierpinski垫片上一类具有相同纵向尺度因子的分形插值函数的最值问题,得出它与基本函数具有相同取值范围的充分必要条件.     

氯化稀土在新疆地毯纱染色中的应用研究

稀土化合物用于毛线、毛布染色在新疆己获得成功,本文对地毯纱染色加稀土工艺的条件进行了小试和大缸投染。试验和批量生产的结果表明,在地毯纱染色和翻色过程中加入氯化稀土可以降低成本、减轻污染、提高地毯质量,有明显的经济效益和社会效益。     

On homeomorphism groups of Menger continua

It is shown that the homeomorphism groups of the (generalized) Sierpinski carpet and the universal Menger continua are not zero-dimensional. These results were corollaries to a 1966 theorem of Brechner. New proofs were needed because we also show that Brechner's proof is inadequate. The method by which we obtain our results, the construction of closed imbeddings of complete Erdos space in the homeomorphism groups, is of independent interest.

     

The Hausdorff measure of a class of Sierpinski carpets

In this paper we obtain the exact value of the Hausdorff measure of a class of Sierpinski carpets with Hausdorff dimension no more than 1 and show the fact that the Hausdorff measure of such Sierpinski carpets can be determined by coverings which only consist of basic squares.     

Variational formula related to the self‐affine Sierpinski carpets

We consider those subsets of the self‐affine Sierpinski carpets that are the union of an uncountable number of sets each of which consists of the points with their location codes having prescribed group frequencies. It is proved that their Hausdorff dimensions equal to the supremum of the Hausdorff dimensions of the sets in the union. The main advantage is that we treat these subsets in a unified manner and the value of the Hausdorff dimensions do not need to be guessed a priori.     

一类Sierpinski垫的Hausdorff测度

设S_λ为压缩比为λ(λ≤1/3)的一类Sierpinski垫,s=-log_λ3为S_λ的Hausdorff维数,N为产生S_λ的所有基本三角形的集合.本文使用网测度方法,获得了S_λ的s-维Hausdorff测度的精确值H~s(S_λ)=1,同时证明了H~s(S_λ)可由S_λ关于网N的s-维Hausdorff测度H_N~s(S_λ)确定,获得了S_λ的非平凡的最佳覆盖.     

Maximum density for the Sierpinski gasket

In the paper we show that there exists a closed convex set attaining the maximum density for the Sierpinski gasket.     

SELF-INTERSECTIONS OF BROWNIAN MOTIONON THE SIERPRISKI GASKET

1IntroductionIn[1],BarlowandPerkinsconstructeda"Brownianmotion"takingvaluesintheSierpinskigasket,afractalsubsetofR',thisisapointrecurrentsymmetric'diffosionprocesscharacterizedbylocalisotropyandhomogeneityproperties.Inthispaper,wediscussforwhichE,X(E)4{X(t),tEE}hask-multiplepoints,thatisdoesthereexistxsuchthatX(tl)=X(tz)=''=X(tk)=xforatleastkdifferenttieE?Thestructureofthispaperisasfollows.InSection2,somedefinitionsarerecalled.InSection3,wediscusstheealstenceofk-lllultiplepoints.Throu…