简介:关于分形维数的证明,如果能给出其下界和上界的估计,则证明成立,但是关于下界的估计往往比较困难.文章对Koch曲线深入讨论,给出其迭代函数系统,然后计算出其Hausdorff维数,并作详细的证明.
简介:Inthispaper,byconstructingtheone-to-onecorrespondencebetweenitsIFSandthequaternaryfractionalexpansion,then-thiterationanalyticalexpressionandthelimitrepresentationofthefamilyoftheKoch-typecurveswitharbitraryanglesareobtained.ThedistinctionbetweenourmethodandthatofH.SaganisthatweprovidethegenerationprocessanalyticallyandrepresentitasagraphofaseriesfunctionwhichlooksliketheWeierstrassfunction.Withthesearithmeticexpressions,wefurtheranalyzeandprovesomeofthefractalpropertiesoftheKoch-typecurvessuchastheself-similarity,theHo¨lderexponentandwiththepropertyofcontinuouseverywherebutdifferentiablenowhere.Then,wewillshowthattheKochtypecurvescanbeapproximatedbydifferentconstructedgenerators.BasedontheanalytictransformationoftheKoch-typecurves,wealsoconstructedmorecontinuousbutnowhere-differentiablecurvesrepresentedbyarithmeticexpressions.Thisresultimpliesthattheanalyticalexpressionofafractalhastheoreticalandpracticalsignificance.