By using Priestley's idea of the evolutionary power spectrum and Nakayama's method of its calculation using narrow-band and low-pass filters, an approach to generate an artificial acceleration time history, nonstationary both in amplitude and frequency, is provided instead of the traditional acceleration time history, nonstationary in amplitude only.
As a result, not even smallpox possessed the evolutionary power to influence humans as a species — to alter our genetic structure.
In this regard, Monte Carlo simulations are undertaken to relate the CMSs to the evolutionary power spectrum.
It completely ignores the evolutionary power of whiskers.
Nonstationary wind time histories, simulating the loading of a downburst, are artificially generated at discrete points along the vertical axis of the building by using the notions of evolutionary power spectral density of the turbulence and time-dependent amplitude modulation function.
The approach consists of locating and expanding the time and frequency non separable part of the decomposed evolutionary power spectral density function by mean of Taylor series expansion to allow the application of the FFT algorithm.
Although the stochastic wave model considered in this work is stationary and homogeneous, it is a straightforward task to extend the methodology introduced to nonstationary and / or non-homogeneous stochastic waves characterized by an evolutionary power spectrum.
The ground motion is modelled as non-stationary zero-mean Gaussian random process defined by a given evolutionary Power Spectral Density function.
The Revolutionary, Evolutionary Power of Communication Technologies.
Subsequently, an inverse stochastic dynamics problem, defined by a set of parametric evolutionary power spectra (EPS), is formulated and solved in a point-wise format for each CMS and for the three components of the motion.
