Quadratic head loss approximations for optimisation problems in water supply networks

Head-Driven Simulation of Water Supply Networks

Up to now most of the existing water supply network analyses have been based on demand-driven simulation models. These models assume that nodal outflows are fixed and are always available. However, this method of simulation neglects the pressure-dependent nature of demand that is characterized by changes in actual nodal outflows particularly during critical events like major mechanical or hydra...

Some quadratic optimisation problems in psychometrics

In this paper, I discuss various examples arising from different areas in psychometrics. I will show that they have a common background and can be solved using a constrained quadratic optimisation algorithm developed by Albers et al. (2008a,b).

Closing the Loop in Water Supply Optimisation

Implementation of sophisticated SCADA systems in the water industry has given plant operators unprecedented capability to monitor and control all aspects of water production and distribution from a centralized control centre. Sophisticated utilities recognize that SCADA need not be composed of one or more isolated “islands of automation” but can and should be a single system operating on a Wide...

Multi - objective Optimisation Methodology for the Canberra Water Supply System

Control and Optimisation of Supply Networks

In this paper we apply concepts from dynamics and control to study structural issues that arise in the management of highly distributed supply chains. The supply chain system is represented by a graph using variables that capture seven important aspects of the supply chain management problem: the topology, transportation (more generally rate of activity), shipping/receiving and market condition...