Acta mathematica scientia,Series A ›› 2001, Vol. 21 ›› Issue (1): 86-93.
• Articles • Previous Articles Next Articles
ZHOU You-He, WANG Ji-Zeng, ZHENG Xiao-Jing
Online:
Published:
Supported by:
国家自然科学基金和国家杰出青年科学基金(批号:10025208)资助
Abstract:
该文基于Daubechies小波尺度函数变换建立了关于Laplace变换的一种反演数值方法.通过对小波尺度函数的低带通谱特性的定性与定量讨论,给出了这一反演方法所得原像函数的适用域.结果发现:其区域大小随着小波尺度函数的分辨指标(resolutionlevel)选取的升高而增大.最后,以颤振曲线、具有指数增长的复函数、和一维振动弦的初边值问题等为例,定量给出了其反演方法的数值结果.通过与相应的原像精确结果对比发现:在反演的有效区域内,其数值反演的原像几乎与精确的原像图象重合.这表明这一Laplace反演数值方法是有效和可靠的.
Key words: 小波尺度函数变换, 低带通谱特性, Laplace反演, 数值方法, 应用举例
CLC Number:
ZHOU You-He, WANG Ji-Zeng, ZHENG Xiao-Jing. A Numerical Inversion of the Laplace Transform By Use of the Scaling Function Transform of Wavelet Theory[J].Acta mathematica scientia,Series A, 2001, 21(1): 86-93.
0 / / Recommend
Add to citation manager EndNote|Reference Manager|ProCite|BibTeX|RefWorks
URL: http://121.43.60.238/sxwlxbA/EN/
http://121.43.60.238/sxwlxbA/EN/Y2001/V21/I1/86
1 BadmusT,ChengA HD,GrilliS.A LaplacetransformbasedthreedimensionalBEMforporoelasticity.IntJfor NumericalMethodsinEngineering,1993,36:67-85 2 SchaperyR A.Approximatemethodsoftransforminversionforviscoelasticstressanalysis.Proc4thUSNatCongr ApplMech,1962,2:1075-1085 3 MillerM K,Guy W T.NumericalinversionoftheLaplacetransformbyuseofjacobipolynomials.SiamJNumerA nal,1966,3(4):624-635 4 BellmanR,KaladaRE,LockettJ.NumericalinversionoftheLaplacetransform.NewYork:AmerElsevierPublCo, 1966 5 DubnerR,AbateJ.NumericalinversionofLaplacetransformbyrelatingthemtothefiniteFouriercosinetransform. JACM,1968,15(1):115-123 6 DurbinF.NumericalinversionofLaplacetransforms:anefficientimprovemettoDubnerandAbate'smethod.The ComputerJournal,1974,17(4):371-376 7 SwansonSR.ApproximateLaplacetransforminversionindynamicviscoelasticity.AsmeJournalofAppliedMechan ics,1980,47:769-774 8 赵鹏君.Laplace变换数值反演的DFT 方法.数学的实践与认识,1996,26(2):7-17 9 范天佑.Laplace变换的数值反演.数学的实践与认识,1987,17(3):68-75 10 周又和,王记增.小波尺度函数的广义高斯积分法及其应用.数学物理学报,1999,19(3):393-400 11 王记增,周又和.广义小波高斯积分法的误差估计.兰州大学学报(自然科学版),1998,34(2):26-30 12 周又和,王记增.基于小波理论的悬臂板压电动力控制模型.力学学报,1998,30(6):719-727 13 ChuiCK.Anintroductiontowavelets.New York:AcedemicPress,1992 14 WilliamJR,AmaratungaK.Introductiontowaveletinengineering.IntJforNumericalMethodsinEngineering, 1994,37:2365-2388 15 齐植兰,张康堇,吴在德.数学物理方程.天津:天津大学出版社,1992
Cited