共查询到19条相似文献,搜索用时 140 毫秒
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本文利用经典的白噪声分析框架研究分式布朗运动局部时中的δ函数.首先借助于S-变换,证明泛函δ_Γ(?)和(?)是Hida广义泛函,其中k_1+k_2+…+k_d=k1和Γ(?)R~d.进一步,将上述结果推广到d维N个参数情形,获得类似的一些结果.推广了文献[Ukrain.Math.J.,2000,52(2):173-182]中所获得的布朗运动情形下的一些结果. 相似文献
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在本文里,我们定义了高维布朗运动的面局部时和有界区域的边界局部时,并用 Dirichlet 形式与随机分析理论证明布朗运动的面局部时对应的光滑测度正好是超平面上的面测度.作为上述结果的应用,我们还得到高维布朗运动可加泛函关于局部时的表示定理. 相似文献
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在本文里,我们定义了高维布朗运动的面局部时和有界区域的边界局部时,并用 Dirichlet 形式与随机分析理论证明布朗运动的面局部时对应的光滑测度正好是超平面上的面测度.作为上述结果的应用,我们还得到高维布朗运动可加泛函关于局部时的表示定理. 相似文献
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本文利用经典的白噪声分析框架研究布朗运动和分数布朗运动混合的局部时.利用白噪声分析方法证明该局部时是一个Hida广义泛函.进一步,借助于S-变换给出了该局部时的混沌表示.本文所获得结果推广了GUO等(2011)获得的分数布朗运动情形下的一些结果. 相似文献
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本文利用白噪声分析方法研究了两个相互独立的多分数布朗运动的碰撞局部时问题.首先分别讨论了碰撞局部时在Hida广义泛函空间和L~2空间中的存在性.进一步,利用多分数布朗运动的局部不确定性获得了该局部时的正则性条件. 相似文献
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Chaos Decomposition of Local Time for d-Dimensional Fractional Brownian Motion with N-Parameter 下载免费PDF全文
Guo Jingjun 《应用概率统计》2014,30(4):337-344
In this paper, the existence and chaos decomposition
of local time of fractional Brownian motion are studied within the canonical
framework of white noise analysis. We prove that the local time of -dimensional
fractional Brownian motion with 1-parameter is a Hida distribution through white
noise approach. Under some conditions, it exists in . Moreover, the
Wiener-Ito chaos decomposition of it is also given in terms of Hermite
polynomials. Finally, similar results of -dimensional fractional Brownian
motion with -parameter are also obtained. We popularize some results in
Bakun (2000) for the case of Brownian motion. 相似文献
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Hideaki Uemura 《随机分析与应用》2013,31(1):136-168
Abstract We determine the weighted local time for the multidimensional fractional Brownian motion from the occupation time formula. We also discuss on the Itô and Tanaka formula for the multidimensional fractional Brownian motion. In these formulas the Skorohod integral is applicable if the Hurst parameter of fractional Brownian motion is greater than 1/2. If the Hurst parameter is less than 1/2, then we use the Skorohod type integral introduced by Nualart and Zakai for the stochastic integral and establish the Itô and Tanaka formulas. 相似文献
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In this paper, we study the fractional smoothness of local times of general processes starting from the occupation time formula, and obtain the quasi-sure existence of local times in the sense of the Malliavin calculus. This general result is then applied to the local times of N-parameter d-dimensional Brownian motions, fractional Brownian motions and the self-intersection local time of the 2-dimensional Brownian motion, as well as smooth semimartingales. 相似文献
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本文给出了由两个不同的分数布朗运动组成的重分数布朗运动的Strassen型泛函重对数律和局部Strassen型泛函重对数律.我们的结果也适用于由两个布朗运动组成的重布朗运动及由一个分数布朗运动和一个布朗运动组成的重过程.最后将上述结果推广到n重分数布朗运动中.推广了已有文献的相应结果. 相似文献
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Yves Meyer Fabrice Sellan Murad S. Taqqu 《Journal of Fourier Analysis and Applications》1999,5(5):465-494
We provide an almost sure convergent expansion of fractional Brownian motion in wavelets which decorrelates the high frequencies. Our approach generalizes Lévy's midpoint displacement technique which is used to generate Brownian motion. The low-frequency terms in the expansion involve an independent fractional Brownian motion evaluated at discrete times or, alternatively, partial sums of a stationary fractional ARIMA time series. The wavelets fill in the gaps and provide the necessary high frequency corrections. We also obtain a way of constructing an arbitrary number of non-Gaussian continuous time processes whose second order properties are the same as those of fractional Brownian motion. 相似文献
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We give a result of stability in law of the local time of the fractional Brownian motion with respect to small perturbations
of the Hurst parameter. Concretely, we prove that the law (in the space of continuous functions) of the local time of the
fractional Brownian motion with Hurst parameter H converges weakly to that of the local time of , when H tends to H
0.
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The Regularity of Stochastic Convolution Driven by Tempered Fractional Brownian Motion and Its Application to Mean-field Stochastic Differential Equations 下载免费PDF全文
In this paper, some properties of a stochastic convolution driven by tempered fractional Brownian motion are obtained. Based on this result, we get the existence and uniqueness of stochastic mean-field equation driven by tempered fractional Brownian motion. Furthermore, combining with the Banach fixed point theorem and the properties of Mittag-Leffler functions, we study the existence and uniqueness of mild solution for a kind of time fractional mean-field stochastic differential equation driven by tempered fractional Brownian motion. 相似文献
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We define and prove the existence of a fractional Brownian motion indexed by a collection of closed subsets of a measure space.
This process is a generalization of the set-indexed Brownian motion, when the condition of independance is relaxed. Relations
with the Lévy fractional Brownian motion and with the fractional Brownian sheet are studied. We prove stationarity of the
increments and a property of self-similarity with respect to the action of solid motions. Moreover, we show that there no
“really nice” set indexed fractional Brownian motion other than set-indexed Brownian motion. Finally, behavior of the set-indexed
fractional Brownian motion along increasing paths is analysed.
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Raghid Zeineddine 《Journal of Theoretical Probability》2018,31(3):1539-1589
We study the asymptotic behavior of weighted power variations of fractional Brownian motion in Brownian time \(Z_t:= X_{Y_t},t \geqslant 0\), where X is a fractional Brownian motion and Y is an independent Brownian motion. 相似文献