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From: mignotte@iro.umontreal.ca Date: August 8, 2008 5:57:20 PM EDT (CA) To: seminaires@iro.umontreal.ca Subject: Predoc oral de Dumitru Erhan

Bonjour.

Vous êtes tous cordialement invités au predoc oral de Dumitru Erhan (dont le directeur de these est Yoshua Bengio) au DIRO, le jeudi 14 aout a 15:00 en salle 3195 (Pavillon Aisenstadt).

Voici le titre de sa presentation:

"Heuristics for Optimizing Deep Architectures

Deep architectures are viewed by many as an efficient new way of tackling difficult Artificial Intelligence problems, such as vision or natural language processing. A flurry of models and algorithms to efficiently train them have sprung over the last several years. The key ingredient seems to be greedy, layer-wise initialization of such models. I will review the state-of-the-art and identify some of the open issues with deep architectures. I will then present our work that tackled some of these issues and propose a series of theoretical extensions and experimental work that suggest new directions for research on deep architectures --- such as learning multimodal representations of visual, textual and musical data as well as collective training of networks. I argue that tackling these problem will give us new insights into the inner workings of these models and could help the optimization process of deep architectures. "

Max Mignotte