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\author{ {\fontspec{Trebuchet MS}Marcin Chrz\k{a}szcz} (Universit\"{a}t Z\"{u}rich, IFJ PAN)}
\institute{UZH}
\title[Physics Prize; Flavour of Physics Challange ]{Physics Prize; Flavour of Physics Challange}
\date{25 September 2014}
\begin{document}
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\begin{center}
\begin{center}
\begin{columns}
\begin{column}{0.75\textwidth}
\flushright\fontspec{Trebuchet MS}\bfseries \Huge {Physics Prize Flavours of Physics Challange}
\end{column}
\begin{column}{0.02\textwidth}
{~}
\end{column}
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% \hspace*{-1.cm}
\vspace*{-3mm}
\includegraphics[width=0.6\textwidth]{lhcb-logo}
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\quad
\vspace{3em}
\begin{columns}
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\flushright \vspace{-1.8em} {\fontspec{Trebuchet MS} \Large Marcin Chrząszcz\\\vspace{-0.1em}\small \href{mailto:mchrzasz@cern.ch}{mchrzasz@cern.ch}}
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\vspace{1em}
\footnotesize\textcolor{gray}{Universit\"{a}t Z\"{u}rich, \\ Institute of Nuclear Physics, Polish Academy of Science}\normalsize\\
\vspace{0.5em}
\textcolor{normal text.fg!50!Comment}{NIPS conference, Montreal\\December 11, 2015}
\end{center}
\end{frame}
}
\begin{frame}[c]{From domain to challenge and back}
{~}
\begin{minipage}{\textwidth}
\includegraphics[width=0.95\textwidth]{images/problem.png}\\
{\color{ PineGreen}{$\Rrightarrow$}} Not all solutions can be reimported back to HEP {\color{ PineGreen}{$\rightarrowtail$}} Physics prize for the ones that can!
\end{minipage}
\vspace*{2.cm}
\end{frame}
\begin{frame}[c]{Physics Prize}
{~}
\begin{minipage}{\textwidth}
{\color{ PineGreen}{$\Rrightarrow$}} HEP meets ML Award\\
An award will be given to the team that, as judged by the LHCb collaboration members on the organizing committee, creates a model that is the most useful for the LHCb experiment. The selection criteria include:
\begin{itemize}
\item The simplicity/straightforwardness/originality of the approach.
\item The computing requirements (CPU and memory demands).
\item The suitability for use in production.
\item The robustness with respect to lack of training statistics.
\end{itemize}
The winning team will be awarded $2000~\$ $ and invited to meet the LHCb collaboration physicists at dedicated {\color{PineGreen}{\href{https://indico.cern.ch/event/433556/other-view?view=lhcb_meeting}{workshop}}} held by University of Zurich on Feb. 18-20, 2016. \\ We thank Intel for supporting this prize.
\pause
\begin{exampleblock}{Upgrade:}
Due to high level of submitted solutions we decided to increase award TWO physics prices, $2000~\$ $ each.
\end{exampleblock}
\end{minipage}
\vspace*{2.cm}
\end{frame}
\begin{frame}[c]{Other members of the physics prize committee}
{~}
\begin{minipage}{\textwidth}
\begin{center}
\begin{columns}
\column{0.22\textwidth}
\includegraphics[width=0.93\textwidth]{images/pkoppenburg.jpg} \\P. Koppenburg
\column{0.22\textwidth}
\includegraphics[width=0.93\textwidth, height=2cm]{images/tblake.pdf} \\T. Blake
\column{0.22\textwidth}
\includegraphics[width=0.83\textwidth]{images/Marc-OlivierBettler.jpg} \\M. Bettler
\column{0.22\textwidth}
\includegraphics[width=0.93\textwidth]{images/dettori2.jpg} \\F. Dettori
\end{columns}
\begin{columns}
\column{0.22\textwidth}
\column{0.23\textwidth}
\includegraphics[width=0.93\textwidth]{images/andrey.jpg} \\A. Ustyuzhanin
\column{0.27\textwidth}
\includegraphics[width=0.73\textwidth]{images/tatiana.png} \\T. Likhomanenko
\column{0.22\textwidth}
\end{columns}
\end{center}
\end{minipage}
\vspace*{2.cm}
\end{frame}
\begin{frame}[c]{And the winners are:}
{~}
\begin{minipage}{\textwidth}
%\pause
\begin{columns}
\column{0.2\textwidth}
\includegraphics[width=0.95\textwidth]{images/gaitan.pdf}
\column{0.8\textwidth}
{\color{PineGreen}{Vincens Gaitan}}, R\&D director in the Grupo AIA. Studied physics and got a PhD in Machine Learning in 1993 with the ALEPH. \\
Very good physics understanding of the problem and the tests!
\end{columns}
{~}\\{~}\\
{\color{PineGreen}{ $\Rrightarrow$ }} Derived a number of very different approaches (some being hacks) that are well documented in this {\color{PineGreen}{ \href{http://blog.kaggle.com/2015/10/27/passing-the-tests-strategies-used-in-cerns-flavour-of-physics/}{blog} }}
{\color{PineGreen}{ $\Rrightarrow$ }} Interesting ideas of doping the background training sample with simulated events from other channel, thus forcing the classifier to be less dependent on data-MC differences.
\begin{exampleblock}{}
This technique might help in the every analysis where DATA/MC differences are problematic.
\end{exampleblock}
\end{minipage}
\vspace*{2.cm}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{frame}[c]{And the winners are:}
{~}
\begin{minipage}{\textwidth}
%\pause
\begin{columns}
\column{0.2\textwidth}
\includegraphics[width=0.95\textwidth]{images/raklin.jpg}
\column{0.8\textwidth}
{\color{PineGreen}{Alexander Rakhlin}}, Associate Professor, Department of Statistics
University of Pennsylvania. \\
In 2016 will be a visiting professor at MIT.
\end{columns}
{~}\\
{\color{PineGreen}{ $\Rrightarrow$ }} ''In Machine Learning the problem of different data sets is well known, and solution is called Transfer learning. It aims at transferring knowledge from a model created on the train set to the test set, assuming they differ in some aspects, e.g. in distribution.''
{\color{PineGreen}{ $\Rrightarrow$ }} This solutions really makes us optimistic as it solves problem that we are usually facing in rare decays:
\begin{itemize}
\item Small statistics
\item Imperfect MC
\item Translating information from control to signal channel.
\end{itemize}
\end{minipage}
\vspace*{2.cm}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%5
\begin{frame}[c]{Advertisement}
{~}
\begin{minipage}{\textwidth}
{\color{PineGreen}{ $\Rrightarrow$ }} The physics winners are invited to the ''Heavy Flavour Data mining'' workshop at Zurich.\\
{\color{PineGreen}{ $\Rrightarrow$ }} You are ALL INVITED! Please come and help us discover NP.\\
{\color{PineGreen}{ $\Rrightarrow$ }} Register: {\color{PineGreen}{ \href{https://indico.cern.ch/event/433556/other-view?view=lhcb_meeting}{LINK} }}.
\begin{center}
\includegraphics[width=0.75\textwidth]{images/zurich-switzerland.jpg}
\end{center}
\end{minipage}
\vspace*{2.cm}
\end{frame}
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mchrzasz