– Modern array signal processing applications place great demands on the underlying antenna array geometry to deliver high performance. This paper discusses a computational solution to an integer multicriteria optimisation (MO) problem that arises in a certain class of nonuniform linear array (NLA) design. “Fully augmentable” arrays have a full and complete set of covariance lag differences; wi...

An efficient minimisation method is presented to find the best polarity of fixed polarity canonical orcoincidence (COC) expansions. The method derives one COC fixed polarity expansion from another adjacent polarity expansion. To reduce CPU time, it utilises bitwise operation and Gray code. Furthermore, it counts the number of “0”s in the polarity matrix rather than polarity matrix multiplicatio...

This paper introduces a novel framework for compressive sensing of biomedical ultrasonic signals based on modelling data with stable distributions. We propose an approach to `p norm minimisation that employs the iteratively reweighted least squares (IRLS) algorithm but in which the parameter p is judiciously chosen by relating it to the characteristic exponent of the underlying alpha-stable dis...

We present a systematic procedure for the synthesis and minimisation of digital circuits using propositional satisfiability. We encode the truth table into a canonical sum of at most k different minterms, which is then passed to one randomised search procedure that minimises k. The solution for a minimal k is the satisfiable representation of the resulting circuit. We show how to use an interes...

An algorithm, based on the Mumford–Shah (M–S) functional, for image contour segmentation and object smoothing in the presence of noise is proposed. However, in the proposed algorithm, contour length minimisation is not required and it is demonstrated that the M–S functional without contour length minimisation becomes an edge detector. Optimisation of this nonlinear functional is based on the me...

Health impact assessment (HIA) on a strategic level focuses on the broad determinants of health. However, the evidence with regard to the health impacts is often necessarily 'soft'. The example of a health impact review on national housing policy in the Netherlands shows that HIA can be effective even in the absence of hard data. Strategies used to overcome the problem of not having hard data a...