Chen, Wei-chiang creator Suphat Vongvisessomjai Chairperson Huynh Ngoc Phien Co-Chairperson Selvalingam, Selvadore Examination Committee Ret-Ser Engineering Agency (R.O.C.) Scholarship Donor text th Bangkok Asian Institute of Technology 1979 monographic eng

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iv, 57 p. The spectrum defines the distribution of energy with frequency and is useful for engineeri.ng design purposes. Frequency spectral function is obtained through the computations of Fourier transform of autocorrelation function. The autocorrelation function is a formulated representation of a random fluctuation process by the application of statistical theory. Six types of autocorrelation functions and the corresponding spectral functions are mathematically and graphically investigated in this study. After having analyzed and compared their characteristics, it is concluded that: (1) Spectrum of fluid flow (air and water) fits to type III with F - f-2 ; (2) Spectrum of unsteady flow due to tidal current fits to type V with F - f - 2 ; and (3) Spectrum of water surface fluctuation due to wave motion or spectrum of streamflow with peak values fits to types V and VI. A thesis submitted in partial fulfillment of requirements for the degree of master of engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1980 Wave mechanics Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B22185 http://203.159.5.9/ait-thesis/detail.php?q=B22185 130598 20260817170855.0