Archive for Belgium


Posted in pictures, Running with tags , , , , on July 11, 2017 by xi'an

CORE talk at Louvain-la-Neuve

Posted in Statistics with tags , , , , , , , on March 16, 2017 by xi'an

Tomorrow, I will give a talk at the seminar for econometrics and finance of CORE, in Louvain-la-Neuve, Belgium. Here are my slides, recycled from several earlier talks and from Judith’s slides in Banff:


Peter Hall (1951-2016)

Posted in Books, Statistics, Travel, University life with tags , , , , , , , , , , , , , on January 10, 2016 by xi'an

I just heard that Peter Hall passed away yesterday in Melbourne. Very sad news from down under. Besides being a giant in the fields of statistics and probability, with an astounding publication record, Peter was also a wonderful man and so very much involved in running local, national and international societies. His contributions to the field and the profession are innumerable and his loss impacts the entire community. Peter was a regular visitor at Glasgow University in the 1990s and I crossed paths with  him a few times, appreciating his kindness as well as his highest dedication to research. In addition, he was a gifted photographer and I recall that the [now closed] wonderful guest-house where we used to stay at the top of Hillhead had a few pictures of his taken in the Highlands and framed on its walls. (If I remember well, there were also beautiful pictures of the Belgian countryside by him at CORE, in Louvain-la-Neuve.) I think the last time we met was in Melbourne, three years ago… Farewell, Peter, you certainly left an indelible print on a lot of us.

[Song Chen from Beijing University has created a memorial webpage for Peter Hall to express condolences and share memories.]

snapshot from Louvain

Posted in Kids, pictures, Running, Travel with tags , , , on October 26, 2015 by xi'an

World statistics day

Posted in pictures, Statistics, Travel, University life with tags , , , , , , , , , on October 20, 2015 by xi'an

Today is October 20, World Statistics Day as launched by the UN. And supported by local and international societies. In connection with that day, among many events, the RSS will be hosting a reception, China will hold a seminar in… Xi’an, how appropriate!, my friend Kerrie Mengersen will give a talk at the Queensland University of Technology (QUT) on The power and promise of immersive virtual environments. (Bringing her pet crocodile to the talk, hopefully!)

Leuven9And I will also give a talk in Louvain-la-Neuve, Belgium, on Le délicat dilemme des tests d’hypothèse et de leur résolution bayésienne. At ISBA, which stands for Institute of Statistics, Biostatistics and Actuarial Sciences and not for the Bayesian society!. within UCL, which stands for Université Catholique de Louvain and not for University College London! (And which is not to be confused with the Katholieke Universiteit Leuven, in Leuven, where I was last year for MCqMC. About 25 kilometers away.) In case this is not confusing enough, here are my slides (in English, while the talk will be in French):

a thesis on random forests

Posted in Books, Kids, Statistics, University life with tags , , , , on August 4, 2014 by xi'an

Blackstone park, Providence, November 28, 2012During a session of the IFCAM workshop this morning I noticed a new arXiv posting on random forests. Entitled Understanding Random Forests: From Theory to Practice, it actually corresponds to a PhD thesis written by Gilles Louppe on the topic. At the Université de Liège, Belgie/Belgium/Belgique. In this thesis, Gilles Louppe provides a rather comprehensive coverage of the random forest methodology, from specific bias-variance decompositions and convergence properties to the historical steps towards random forests, to implementation details and recommendations, to describing how to rank (co)variates by order of importance. The last point was of particular relevance for our current work on ABC model choice with random forests as it relies on random forests and relies on the frequency of appearance of a given variable to label its importance. The thesis showed me this was not a great way of selecting covariates as it did not account for correlation and could easily miss important covariates. It is a very complete, well-written and beautifully LaTeXed (with fancy grey boxes and all that jazz!). As part of his thesis, Gilles Louppe also contributed to the open source machine learning library Scikit.  The thesis thus makes a most profitable and up-to-date entry into the topic of random forests…

beer factory

Posted in pictures, Travel, Wines with tags , , , , , on April 19, 2014 by xi'an