DETERMINING A PARAMETER IN A PHYSICAL SYSTEM

摘要

A method of determining a parameter of a physical model representing the electrical behaviour of a composition is provided. The method comprises defining said model by a relationship between at least one electrical property of the composition, a plurality of physical variables of the composition and said parameter, and measuring a first electrical property of the composition. A sample which is representative for said composition is selected, and a second electrical property of the sample is measured for various magnitudes of at least one of said physical variables. An incoherence function is selected, defining a difference between the measured electrical properties and the electrical properties as calculated from said relationship, said incoherence function being such that independent measurements are weighted in dependence of their accuracy. Said parameter is determined by minimisation of the incoherence function. The first and second property can be the same property.