Tuesday, 25th Oct 2016(Location to be decided)
Tuesday, 25th Oct 2016EF122, Engineering Building EF
Dr Michal Ferov(CARMA, The University of Newcastle)
Enhancing LambdaMART Using Oblivious Trees
Learning to rank is a machine learning technique broadly used in many areas such as document retrieval, collaborative filtering or question answering. We present experimental results which suggest that the performance of the current state-of-the-art learning to rank algorithm LambdaMART, when used for document retrieval for search engines, can be improved if standard regression trees are replaced by oblivious trees. This paper provides a comparison of both variants and our results demonstrate that the use of oblivious trees can improve the performance by more than 2:2%. Additional experimental analysis of the inuence of a number of features and of a size of the training set is also provided and confirms the desirability of properties of oblivious decision trees.
About the Speaker: Dr Michal Ferov is a Postdoctoral Research Fellow in the School of Mathematical and Physical Sciences,Faculty of Science and Information Technology.
Thursday, 27th Oct 2016V205, Mathematics Building
George Havas(The University of Queensland)
Commutator identities as products of powers
Some Engel words and also commutators of commutators can be expressed as products of powers. I discuss recent work of Colin Ramsay in this area, using PEACE (Proof Extraction After Coset Enumeration), and in particular provide expressions for commutators of commutators as short products of cubes.
CARMA and AMSI Workshop
Tools and Mathematics: Instruments for Learning
Tuesday, 29th Nov 2016 — Thursday, 1st Dec 2016Sydney Campus
Please visit the workshop web page for further information.
Australian Mathematical Society Conference 2016
Monday, 5th Dec 2016 — Thursday, 8th Dec 2016[Australian National University]
The Australian Mathematical Society Conference is the annual conference of the Australian Mathematical Society, it brings together researchers from around Australia.
Friday, 16th Dec 2016 — Saturday, 17th Dec 2016University House
For details, please visit the APCO web page.
Hypergeometric Motives and Calabi-Yau Differential Equations
Sunday, 8th Jan 2017 — Saturday, 28th Jan 2017[The University of Melbourne]
Details are available on the conference webpage.
9:00 am — 5:00 pm
Friday, 10th Feb 2017V205, Mathematics Building
A meeting in Paris. The following colleagues have agreed to give a testimony related to the different scientific or academic activities on which Jon was involved: Adrian S. Lewis (Cornell University), David H. Bailey (Lawrence Berkeley National Laboratory ), Henry Wolkowicz (University of Waterloo), Ivar Ekeland (University Paris-Dauphine), Luc Trouche (Ecole Normale Supérieure, Lyon), Qiji Jim Zhu (Western Michigan University), Martin Grötschel (Berlin-Brandenburgische Akademie der Wissenschaften), Patrick Combettes (North Carolina State University).
Contact: Prof. Michel Théra (University of Limoges and Federation University).
7th Workshop on High-Dimensional Approximation
Monday, 13th Feb 2017 — Friday, 17th Feb 2017[University of NSW]
Visit the conference website for more information.
International Workshop on Combinatorial Algorithms
Monday, 17th Jul 2017 — Friday, 21st Jul 2017(Location to be decided)
International Conference on Fixed Point Theory and Its Applications
Monday, 24th Jul 2017 — Friday, 28th Jul 2017Harbourview Function Centre [Newcastle, NSW]
The conference is in the planning stages, and information will be added to the conference page as it becomes available.