List of Titles

Comparing different nonsmooth minimization methods and software

- Karmitsa, Napsu, Bagirov, Adil, Makela, Marko

Authors: Karmitsa, Napsu , Bagirov, Adil , Makela, Marko
Date: 2012
Type: Text , Journal article
Relation: Optimization Methods and Software Vol. 27, no. 1 (2012), p. 131-153
Relation: http://purl.org/au-research/grants/arc/DP0666061
Full Text: false
Reviewed:
Description: Most nonsmooth optimization (NSO) methods can be divided into two main groups: subgradient methods and bundle methods. In this paper, we test and compare different methods from both groups as well as some methods which may be considered as hybrids of these two and/or some others. All the solvers tested are so-called general black box methods which, at least in theory, can be applied to solve almost all NSO problems. The test set includes a large number of unconstrained nonsmooth convex and nonconvex problems of different size. In particular, it includes piecewise linear and quadratic problems. The aim of this work is not to foreground some methods over the others but to get some insight on which method to select for certain types of problems. © 2012 Taylor and Francis Group, LLC.

Impact of filter design variables on clogging in stormwater filters

- Kandra, Harpeet, Deletic, Ana, McCarthy, David

Authors: Kandra, Harpeet , Deletic, Ana , McCarthy, David
Date: 2012
Type: Text , Conference paper
Relation: 7th International Conference on Water Sensitive Urban Design, WSUD 2012; Melbourne, VIC; Australia; 21st February - 23rd February 2012;
Full Text: false
Reviewed:
Description: This article, using a laboratory-based approach, aims to study the effect of different filter bed design variables on the clogging phenomenon and its inter-relationship with treatment performance. Filter bed design parameters studied include: filter media particle sizes (0.5mm, 2mm, 5mm), depth of the filter bed (100mm, 300mm and 500mm), and filter media packing configurations. To study the effect of packing, configurations were constructed with a single layer of a specific filter media size, two and three layers of different particle sizes, and mixed filter bed with particles of different sizes. It was found that parameters, such as size of filter grains and depth of filter bed, affected the overall performance of filter beds considerably (initial infiltration rate, volume of stormwater treated before clogging and overall treatment performance). Layering of particles also improved the performance of different filter bed designs but three layered system behaved in same way as a two-layered system. Experimentation with these variables will assist in development of a modelling tool to predict clogging of filter media with high infiltration rates used for stormwater treatment.
Description: WSUD 2012 - 7th International Conference on Water Sensitive Urban Design: Building the Water Sensitive Community, Final Program and Abstract Book

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