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In this paper, the differences of turbulent coherent structure between the smooth and rough boundary layers are analysed. Based on the discussing the transient properties from the smooth wall to the rough wall, the physical model of coherent structure for the rough boundary layer are established. The width of slowly-moving turbulent spot and the bursting time are obtained, which are in agreement with experimental results.The project supported by the National Nature Science Foundation of China 相似文献
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本文讨论了Banach空间的一些逼近问题。给出了两个子空间的和可近的充要条件,对已知结果的推广,给出了连续函数空间和Lp(1≤p<∞)空间中的两个逼近定理。 相似文献
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一类非线性二阶差分方程解的振动性 总被引:7,自引:0,他引:7
本文建立了非线性二阶差分方程的若干振动准则,所得结果改进了文[5]中相应的定理. 相似文献
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应用一种新的正则化方法建立了一类新的求解第一类Fredholm积分方程的正则化算法, 并借助Matlab软件给出了数值算例.数值结果与理论分析基本一致,而且表明文中建立的正则化比通常的Tikhonov正则化更精确. 相似文献
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Weak convergence and strong consistency of the remainder term in the Bahadur representation of the sample p-quantile are established. From the results we obtain asymptotic normality and the laws of iterated logarithm for smooth quantile estimator. 相似文献
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EXISTENCE OF SOLUTIONS OF A FAMILY OF NONLINEAR BOUNDARY VALUE PROBLEMS IN L~2-SPACES 总被引:1,自引:0,他引:1
Wei Li Zhou HaiyunSchool of Mathematics Statistics Hebei University of Economics Business Shijiazhuang China. Inst.of Appl.Math.and Mech. Ordnance Engineering College Shijiazhuang China. 《高校应用数学学报(英文版)》2005,(2)
§ 1 Introduction and preliminariesThe equations related to the p- L aplacian operatorΔp have been studied in differentaspects[1— 4 ] sinceΔp arises from a variety of physical phenomena such as non Newtonianfluids,reaction- diffusion problems,etc.In this paper,the following equation(1) which canbe regarded as an extension of those in[1— 4 ]will be discussed:- div(α(gradu) ) +|u(x) |p- 2 u(x) +g(x,u(x) ) =f (x) a.e. onΩ-〈n,α(gradu)〉∈βx(u(x) ) ,a.e.onΓ . (1) More details can b… 相似文献