Convergence-accelerating methods have been applied to series expansions for the stable-law density Q,(z)=~foe-"=cos(zu)du which is, in turn, simply related to the spectral density of the Kohlrausch-Williams/Watts (KWW) decay function q~(t)--e-lt/~)=]. N.m.r. relaxation parameters such as NOEF, T1 and Tip are computed for polycarbonate and polydimethylsiloxane using the new series and the results compared to experiment and to earlier computations which employed a decomposition of the KWW function into a sum of exponential terms.
Посилання на статтю:
Improved computational methods for the calculation of Kohlrausch-Williams/Watts (KWW) decay functions / George H. Weiss and Menachem Dishon // Polymer. – 1994. – Vol 35. – P. 1880-1883.