立方型状态方程结合Eyring理论在液体混合物黏度计算中的应用

Cubic equations of state (EOS) have been combined with the absolute rate theory of Eyring to calculate viscosities of liquid mixtures. A modified Huron Vidal gE-mixing rule is employed in the calculation and in comparison with the van Laar and the Redlich-Kister-type mixing rule. The EOS method gives an accurate correlation of liquid viscosities with an overall average deviation less than 1% for 67 binary systems including aqueous solutions. It is also successful in extrapolating viscosity data over a certain temperature range using parameters obtained from the isotherm at a given temperature and in predicting viscosities of ternary solutions from binary parameters for either polar or associated systems.     

Ermittlung der dynamischen Werkstoffkonstanten von bituminös gebundenen Baustoffen

The evaluation of the dynamical properties of bituminous mixtures An experimental method for the evaluation of the dynamical properties of bituminous mixtures is presented. Because of their viscoelastic behaviour the design of a special testing device was necessary. In this paper the guiding ideas for this testing machine are developed. Moreover, some experimental results and experiences, which could be valuable for calculating the stresses in road constructions, are given.     

A sequential algorithm for the universal coding of finite memorysources

The estimation and universal compression of discrete sources are considered, and a sequential algorithm for the universal coding of finite memory sources, attaining asymptotically minimum redundancy, is presented. The algorithm performs an online estimation of the source states and uses an arithmetic code