An inverse problem is formulated to determine water capacity of porous media. Mathematical model of the problem involves a nonlinear parabolic equation in which the coefficient representing water capacity is unknown and to be determined from over specified data measured on the boundary. By using...

By converting from frequency domain models to time domain models, nonlinear behavior and linear distributed behavior can both be effectively represented. Three methods are presented to convert fluid line models from the frequency domain to the time domain. Comparison shows that combining...

The conventional Monte Carlo approach to integration and simulation is a useful alternative to analytic or quadrature methods. It has been recognized through theory and practice that a variety of uniformly distributed sequences provide more accurate results than a purely pseudorandom sequence....

Channel allocation schemes in a cellular network can be modeled as combinatorial optimization problems. Genetic algorithms (GAs) have been shown to be effective and robust tools in providing adequate solutions of such problems. This paper investigates the application of GAs to two common...

The concept of interconnection is fundamental to the modelling of discrete, physical systems. On the basis of centuries of scientific experience, everyone will agree that the concept is part of a logically consistent approach, permitting us to draw conclusions, verifiable by observation, from...

In this paper, the proposed constraint method in conjunction with Lagrange’s equation systematically to discretize and simulate for large-scale systems is illustrated by application of a rotating Euler–Bernoulli beam. A good truncation procedure based on the system eigenvalues for this...

A population balance model is presented for describing the direct particle-to-particle heat transfer in fluid–solid processing systems. In developing the model, simple kinetic equations are assumed to describe the heat transfer process, but the particle–particle interactions are considered...

Most of the models discussed up till now in predictive microbiology do not take into account the variability of microbial growth with respect to space. In structured (solid) foods, microbial growth can strongly depend on the position in the food and the assumption of homogeneity can thus, not be...

In electrical circuit simulation, a refined network approach is used to describe secondary and parasitic effects. This ansatz yields initial-boundary value problems of mixed partial-differential and differential-algebraic equations, so-called PDAE systems. One requirement for method-of-lines...

In recent years the analysis and synthesis of control systems in descriptor form has been established. The general description of dynamical systems by differential-algebraic equations (DAE) is important for many applications in mechanics and mechatronics, in electrical and electronic...