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运用Fourier变换和扰动方法研究了一类阻尼Boussinesq方程初边值问题的整体解.在一定条件下得到了这类Boussinesq方程在古典空间中整体解的存在唯一性和形式解的长时间渐近性. 相似文献
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This paper studies the problem of estimating the number of clusters in the context of logistic regression clustering. The
classification likelihood approach is employed to tackle this problem. A model-selection based criterion for selecting the
number of logistic curves is proposed and its asymptotic property is also considered. The small sample performance of the
proposed criterion is studied by Monto Carlo simulation. In addition, a real data example is presented.
The authors would like to thank the editor, Prof. Willem J. Heiser, and the anonymous referees for the valuable comments and
suggestions, which have led to the improvement of this paper. 相似文献
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一类Boussinesq方程整体解的渐近理论 总被引:3,自引:2,他引:1
研究如下带阻尼Boussinesq方程Cauchy问题的整体解utt-auttxx-2butxx=-cuxxxx uxx-αu β(up)xx,u(x,0)=ε2(x), ut(x,0)=ε2ψ(x),其中x∈R1,t>0,a,b,c,α是正常数,β∈R1,ε>0是小参数,p 2是正整数.假设a c-b2>0时,得到了上面问题整体解的适定性及长时间渐近解. 相似文献
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研究如下Boussinesq方程的整体解utt-2butxx=-αuxxxx+uxx+β(u2)xx,这里,x∈R1,t>0,b,α,β是正常数.假设α-b2>0时,在Sobolev空间C([0,+∞),L2([0,+∞)))∩C1([0,+∞),H-1([0,+∞)))中,得到了上面问题整体解的适定性及长时间渐近解. 相似文献
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韩彦彬 《河北大学学报(自然科学版)》1993,(1)
本文的目的是,讨论由正定的C~r周期核K(x,y,u,v)生成的积分算子k的本征值的渐近分布,主要结果是,当r是偶数时,本征值λ_n(K)满足sum from 1 to ∞ (n~(r/2)λ_n)(K) <∞,而当r奇数时则有sum from 1 to ∞ (n~rλ_n~2)(K)<∞。 相似文献
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