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Leon Bottou, Andrew W Moore

Microsoft Research; Carnegie Mellon University

Learning Using Many Examples

1:00 – 3:00pm Monday, December 03, 2007

The statistical learning theory suggests to choose large capacity models that barely avoid over-fitting the training data. In that perspective, all datasets are small. Things become more complicated when one considers the computational cost of processing large datasets. Computationally challenging training sets appear when one want to emulate intelligence: biological brains learn quite efficiently from the continuous streams of perceptual data generated by our six senses, using limited amounts of sugar as a source of power. Computationally challenging training sets also appear when one wants to analyze the masses of data that describe the life of our computerized society. The more data we understand, the more we enjoy competitive advantages. The first part of the tutorial clarifies the relation between the statistical efficiency, the design of learning algorithms and their computational cost. The second part makes a detailed exploration of specific learning algorithms and of their implementation, with both simple and complex examples. The third part considers algorithms that learn with a single pass over the data. Certain algorithms have optimal properties but are often too costly. Workarounds are discussed. Finally, the fourth part shows how active example selection provides greater speed and reduces the feedback pressure that constrain parallel implementations.

http://leon.bottou.org/talks/largescale

Léon Bottou received a Diplôme from l'Ecole Polytechnique, Paris in 1987, a Magistère en Mathématiques Fondamentales et Appliquées et Informatiques from Ecole Normale Supérieure, Paris in 1988, and a PhD in Computer Science from Université de Paris-Sud in 1991. He joined AT&T Bell Labs from 1991 to 1992 and AT&T Labs from 1995 to 2002. Between 1992 and 1995 he was chairman of Neuristique in Paris, a small company pioneering machine learning for data mining applications. He has been with NEC Labs America in Princeton since 2002. Léon's primary research interest is machine learning. His contributions to this field address theory, algorithms and large scale applications. Léon's secondary research interest is data compression and coding. His best known contribution in this field is the DjVu document compression technology (http://www.djvu.org.) Léon published over 70 papers and is serving on the boards of JMLR and IEEE TPAMI. He also serves on the scientific advisory board of Kxen Inc .

Andrew Moore is currently responsible for growing a new Google office on CMU's campus in Pittsburgh. The office focuses on numerous statistical and large scale systems issues in structured data extraction, Google's infrastructure, internet advertising, and fraud prevention. Prior to joining Google in January 2006, Andrew was a Professor of Robotics and Computer Science at the School of Computer Science, Carnegie Mellon University. Andrew began his career writing video-games for an obscure British personal computer ( http://www.oric.org/index.php?page=software&fille=detail&num_log=2). He rapidly became a thousandaire and retired to academia, where he received a PhD from the University of Cambridge in 1991. His main research interest is data mining: statistical algorithms for finding all the potentially useful and statistically meaningful patterns in large sources of data.