Author:Grobler, J; Engelbrecht, AP; Kendall, G; Yadavalli, VSSDate:Jul 2014This paper introduces the concept of heuristic space diversity and investigates various strategies for the management of heuristic space diversity within the context of a meta-hyper-heuristic algorithm. Evaluation on a diverse set of ...Read more
Author:Earle, AC; Saxe, AM; Rosman, Benjamin SDate:Aug 2017Hierarchical reinforcement learning methods offer a powerful means of planning flexible behavior in complicated domains. However, learning an appropriate hierarchical decomposition of a domain into subtasks remains a substantial challenge. ...Read more
Author:Earle, AC; Saxe, AM; Rosman, Benjamin SDate:Apr 2018Hierarchical reinforcement learning methods offer a powerful means of planning flexible behavior in complicated domains. However, learning an appropriate hierarchical decomposition of a domain into subtasks remains a substantial challenge. ...Read more
Author:Saxe, AM; Earle, AC; Rosman, Benjamin SDate:Aug 2017Hierarchical architectures are critical to the scalability of reinforcement learning methods. Most current hierarchical frameworks execute actions serially, with macro-actions comprising sequences of primitive actions. We propose a novel ...Read more
Author:McLaren, M; Roux, FS; Forbes, ADate:Jul 2012This presentation highlights the increasing interest in quantum and high dimensional entanglement.Read more
Author:Boguslavsky, LDate:Oct 2010In this work, High Efficiency Particulate Air (HEPA) Filters are designed to keep small harmful particles from entering a control environment or to prevent them from escaping. Nonwoven fabrics for filtration application were produced from ...Read more
Author:Ngcobo, Sandile; Forbes, A; Ait-Ameur, KDate:Jul 2012The transformation of a single mode TEM00 Gaussian beam by forcing the laser to operate into a symmetrical single mode higher order TEMp0 Laguerre Gaussian beam intensity distribution is very useful in improving and substantially increasing ...Read more
Author:Du Preez, NC; Forbes, A; Botha, LRDate:Sep 2009In this paper researchers present the design of a CO2 laser resonator that produces as the stable transverse mode a super–Gaussian laser beam. The resonator makes use of an intra–cavity diffractive mirror and a flat output coupler, generating ...Read more
Author:Strauss, Hencharl J; Bollig, C; Botha, RC; Von Bergmann, HM; Burger, JPDate:Jul 2006This presentation aims at the following: to develop new techniques to mount laser crystals; compare the laser properties of two equally doped, high power Nd:YVO4 and Nd: GdVO4 lasers; build a 1um vanadate laser with average output power ...Read more
Author:Khutlang, Rethabile; Khanyile, Nontokozo P; Makinana, Sisanda; Nelwamondo, Fulufhelo VDate:May 2016Biometric fingerprint scanners scan the external skin features onto a 2D image. The performance of the automatic fingerprint identification system suffers if the finger skin is wet, worn out, fake fingerprint is used et cetera. Swept source ...Read more
Author:Malherbe, Johan; Engelbrecht, F; Landman, W; Engelbrecht, CDate:Sep 2011Tropical cyclone landfall within the southwest Indian Ocean (SWIO) basin occurs on average about 3 times per year over Mozambique and Madagascar. Rainfall associated with tropical cyclones over the interior of southern Africa can also cause ...Read more
Author:Mngadi, SB; Durrheim, RJDate:Oct 2013Subsidence and collapse of unmapped shallow coal mine workings poses a risk to the public and hampers the development of valuable property. A high-resolution reflection seismic survey was conducted to determine whether it is possible to map ...Read more
Author:Sharma, AmeethDate:Jul 2016Light based techniques continue to gain momentum in different spheres of diagnostic and therapeutic applications as a result of their non-invasive, noncontact properties. One such technique is Optical Coherence tomography (OCT). Since it was ...Read more
Author:Sharma, Ameeth; Singh, Ann; Roberts, Ted; Ramokolo, Lesiba R; Strauss, Hencharl JDate:Jul 2016Light-based techniques continue to gain momentum in different spheres of diagnostic and therapeutic applications due to their non-invasive, non-contact properties. One such technique is Optical Coherence tomography (OCT). Since first being ...Read more
Author:Klein, Peter; Roos, T; Sheer, JDate:Jan 2014The development of high temperature thermal storage systems is required to increase the solar share of solar-hybrid gas turbine cycles. This paper proposes a pressurised packed bed of Encapsulated Phase Change Materials (EPCM) as a thermal ...Read more
Author:Fouché, Gerda; Senabe, J; Khorombi, E; Kolesnikoya, N; Maharaj, VJ; Nthambeleni, RDate:Nov 2008Plants have a long history of use in the treatment of cancer and over 60% of currently used anti-cancer agents are derived in one way or another from natural sources. South Africa has a rich plant biodiversity with only a limited number ...Read more