共查询到20条相似文献,搜索用时 703 毫秒
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对于一维Schrdinger算子,本文基于Simon给出的惟—性定理(势函数由A-函数惟一确定)证明了势函数连续依赖于A-函数;反过来,若势函数q∈L~1(0,∞),给出了A-函数也连续依赖于势函数的结论. 相似文献
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该文考虑量子环图上Sturm-Liouville算子.在一部分势函数已知情况下,通过谱数据重构未知势函数,并且给出其重构算法和唯一性定理. 相似文献
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蛋白质空间结构预测的一种优化模型及算法 总被引:8,自引:0,他引:8
用理论方法预测蛋白质结构有两个难点,第一是要有一个合理的势函数,第二是要有一个有效的寻优方法找到势函数的全局极小点,本文采用联合残基力场建立了蛋白质空间结构预测模型,然后用我们给出的一种改进模拟退火算法搜索势函数的全局极小点,对脑啡肽的空间结构进行了预测和分析。 相似文献
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本文考虑由三组谱确定势函数和边值条件的问题,即证明Sturm-Liouville问题的势函数可以由[0,1]区间上的一组整谱和[0,α],[α,1](0<α<1)区间上的两组部分谱唯一确定.特别地,在这两个区间内,分别可以缺失任意-个特征值,势函数仍可以被唯一确定. 相似文献
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研究了Sturm-Liouville算子Aq,h,Hj,j=1,2,…中势函数q(x)的确定性问题,即已知部分区间[a,1](a∈(0,1))上的势函数q(x),则无限组部分谱信息可唯一确定整个区间[0,1]上的势函数.推广了Simon的方法,且将选择条件的范围从一组谱扩展到了无限组. 相似文献
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The materials-balance production function proposed in this paper is a modified Cobb-Douglas-type function which is as neoclassical in nature as materials-balance considerations would seem to permit. Incorporation of such a production function in a neoclassical growth model severely limits the growth potential of an economy with exhaustible resources. 相似文献
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CONVERGENCEOFSOLUTIONS FORRLC-NONLINEARNETWORKSWITHTIME-VARYINGELEMENTS¥JiangJija(蒋断发)(Dapt.ofMath.,UniversityofScienceandTec... 相似文献
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Let L:=-△+V be the Schrodinger operator on Rnwith n≥3,where V is a non-negative potential satisfying△-1(V)∈L∞(Rn).Let w be an L-harmonic function,determined by V,satisfying that there exists a positive constantδsuch that,for any x∈Rn,0<δ≤w(x)≤1.Assume that p(·):Rn→(0,1]is a variable exponent satisfying the globally log-H?lder continuous condition.In this article,the authors show that the mappings HLp(·))(Rn)■f■wf∈Hp(·)(Rn)and HLp(·)(Rn)■f■(-△)1/2L-1/2(f)∈Hp(·)(Rn)are isomorphisms between the variable Hardy spaces HLp(·)(Rn),associated with L,and the variable Hardy spaces Hp(·)(Rn). 相似文献
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本文导出独立的指数分布随机变量和的分布公式,利用它求出技术系数和最终需求都为指数分布随机变量的投入产出模型的确定性等价方程,推广了Harris和Goicoechea的结果. 相似文献
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Z.Akdogan M.Demirci O. Sh. Mukhtarov 《数学物理学报(B辑英文版)》2005,25(4):731-740
1IntroductionIt is well-known that the Sturmian Theory is an important aid in solving many problemsin mathematical physics.Therefore this theory is one of the most actual and extensivelydeveloped field in spectral analysis of boundary-value problems of St… 相似文献
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This article deals with the global existence and nonexistence of solutions to the degenerate heat inequalities with singular potential on the Heisenberg group. To prove the existence results, the authors adjust the method of supersolutions to their setting. The nonexistence results are obtained by means of the test function method. 相似文献
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Hua-zhongTang 《计算数学(英文版)》2004,22(4):622-632
This paper attempts to develop kinetic flux vector splitting(KFVS)for the Euler equa-tions with general pressure laws.It is well known that the gas distribution function forthe local equilibrium state plays an important role in the construction of the gas-kineticschemes.To recover the Euler equations with a general equation of state(EOS),a newlocal equilibrium distribution is introduced with two parameters of temperature approx-imation decided uniquely by macroscopic variables.Utilizing the well-known connectionthat the Euler equations of motion are the moments of the Boltzmann equation wheneverthe velocity distribution function is a local equilibrium state,a class of high resolutionMUSCL-type KFVS schemes are presented to approximate the Euler equations of gas dy-namics with a general EOS.The schemes are finally applied to several test problems for ageneral EOS.In comparison with the exact solutions,our schemes give correct location andmore accurate resolution of discontinuities.The extension of our idea to multidimensionalcase is natural. 相似文献
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一个推广的二变量时滞积分不等式及其应用 总被引:1,自引:1,他引:0
建立了一类二变量的时滞积分不等式,不等式包含一个一重积分和两个二重积分,二重积分内包含两个不同的没有假设单调性的未知函数的复合函数.使用单调化技术,给出积分不等式中未知函数的估计.结果能对相关文献中考虑的积分不等式中未知函数进行估计.进一步,结果给出了一类积分-微分方程解的估计. 相似文献