In this element the velocity and pressure fields are approximated using biquadratic and bi-linear shape functions, respectively, this corresponds to a total of 22 degrees of freedom consisting of 18 nodal velocity components (corner, mid-side and centre nodes) and four nodal pressures (corner nodes). [Pg.28]

To model the experimental data we used a global-fit procedure to simulate EPS, integrated TG, heterodyne-detected TG, and the linear absorption spectrum simultaneously. The pulse shape and phase were explicitly taken into account, which is of paramount importance for the adequate description of the experimental data. We applied a stochastic modulation model with a bi-exponential frequency fluctuation correlation function of the following form [Pg.167]

Mathematical modeling was applied in interpreting textural properties (surface area, pore volume, average pore diameter) as the functions of temperature and time as two independent variables. Based on an analysis of shapes of the surfaces, Sp(x, t), Vp(x, t) and R(x,t), different polynomials models have been tested and the simplest (linear in terms of time but quadratic in terms of heating temperature) was accepted y(x,t) = bi + b2X + bst + bft [Pg.400]

© 2019 chempedia.info