In this paper models for field determination in electromagnetic devices in order to calculate forces are discussed. Proposed models accounting for saturation and movement with high accuracy field values needed for force calculation are also given. Finite elements are used in the saturated parts...

The modular simulation idea is to represent the components of a physical system by subroutines whose interaction mimics the physical interaction. This approach facilitates validation and also the introduction of parallel processing. In this paper a modular scheme is introduced in which the...

In this paper, solutions of the equations which describe sound propagation in nonuniform ducts are computed with a finite element approach. A least squares approach is considered and compared to a Galerkin approach. The least squares problem is solved using an iterative method and compared with...

Some existence theorems for the Helmholtz equation in three dimensions and in all space are proven, when the index of refraction is characterized by a random function. These results are used to apply the Born approximation for the scattering of a wave incident in a thin indefinite layer.

Space transformations are proposed as a mathematically meaningful and practically comprehensive approach to simulate multidimensional random fields. Within this context the turning bands method of simulation is reconsidered and improved in both the space and frequency domains.

The response of offshore structures to random wave excitation is studied for general nonstationary stochastic excitation, constant, time-dependent, or stochastic coefficients, and nonlinear forces without linearization, or averaging methods and closure approximations, or numerical methods. The...

The decomposition method [1,2] is applied to oscillatory problems eliminating need for linearization of nonlinear systems and perturbation as well as allowing consideration of stochastic oscillators.

The MULTSIM model was designed as a tool to investigate the effects of changes in the travel environment on the flow of traffic. The package performs a micro-simulation of traffic in which individual drivers are provided with objectives and constraints. The vehicles are then released down the...