Accurate models for Overcurrent relays (OC) with inverse time characteristics have an important role for efficient coordination of power system protection devices. This paper proposes a new method for modelling of OC relays based on fuzzy logic. The new model is more accurate than traditional models and has been validated by comparing it with the linear and nonlinear analytical models.

Emissions reduction legislation relies upon 'bottom-up' accounting of industrial and biogenic greenhouse-gas (GHG) emissions at their sources. Yet, even for relatively well-constrained industrial GHGs, global emissions based on 'top-down' methods that use atmospheric measurements often agree poorly with the reported bottom-up emissions. For emissions reduction legislation to be effective, it is...

A new inverse technique for modelling groundwater flow, based on a functional minimization technique, has been used to calibrate a groundwater flow model of a subregion of the Port Willunga aquifer within the Willunga Basin in South Australia. The Willunga Basin is the location of extensive viticulture, irrigated primarily by groundwater, the levels and quality of which have declined significan...

We study the application of Bayesian spatial modelling to seismic tomography, a geophysical, high dimensional, linearized inverse problem that infers the three-dimensional structure of the Earth’s interior.We develop a spatial dependence model of seismic wave velocity variations in the Earth’s mantle based on a Gaussian Matérn field approximation. Using the theory of stochastic partial differen...

Inverse modelling of the spatial distribution of NOx emissions on a continental scale using satellite data I. B. Konovalov, M. Beekmann, A. Richter, and J. P. Burrows Institute of Applied Physics, Russian Academy of Sciences, Nizhniy Novgorod, Russia Laboratoire Inter-Universitaire de Systèmes Atmosphériques, CNRS, Créteil, France Institute of Environmental Physics and Remote Sensing, IUP/IFE, ...

In accordance with the requirements for the degree of Bachelor of Engineering (Honours) in the division of Electrical Engineering, I hereby submit for your consideration this thesis entitled " P-N junction doping profile extraction via inverse modelling ". The work was performed under the supervision of Associate Professor Y.T Yeow. I declare that the work submitted in this thesis is my own, ex...

Some optical surfaces are formed by gravity sagging of molten glass. A glass sheet supported on a ceramic former is heated; the glass becomes a very viscous fluid and sags under its own weight until the lower surface is in full contact with the former. The smooth upper free surface is the required optical surface. Its shape is dependent on the initial geometry and, in optical terms, differs sig...

This paper addresses stability issues of the learning process when the distal in space approach (Jordan & Rumelhart 92) is used to learn inverse models of dynamical systems. Both direct and indirect versions of command error approximations are analysed on linear plants. It is shown that none of them is suitable when the plant is an unstable non-minimum phase system. When the plant is unstable, ...