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Learning Deep Architectures for AI
Yoshua Bengio
出版
Now Publishers Inc
, 2009
主題
Computers / Artificial Intelligence / General
Computers / Machine Theory
Computers / Data Science / Neural Networks
Computers / Data Science / Machine Learning
Mathematics / Discrete Mathematics
ISBN
1601982941
9781601982940
URL
http://books.google.com.hk/books?id=cq5ewg7FniMC&hl=&source=gbs_api
EBook
SAMPLE
註釋
Can machine learning deliver AI? Theoretical results, inspiration from the brain and cognition, as well as machine learning experiments suggest that in order to learn the kind of complicated functions that can represent high-level abstractions (e.g. in vision, language, and other AI-level tasks), one would need deep architectures. Deep architectures are composed of multiple levels of non-linear operations, such as in neural nets with many hidden layers, graphical models with many levels of latent variables, or in complicated propositional formulae re-using many sub-formulae. Each level of the architecture represents features at a different level of abstraction, defined as a composition of lower-level features. Searching the parameter space of deep architectures is a difficult task, but new algorithms have been discovered and a new sub-area has emerged in the machine learning community since 2006, following these discoveries. Learning algorithms such as those for Deep Belief Networks and other related unsupervised learning algorithms have recently been proposed to train deep architectures, yielding exciting results and beating the state-of-the-art in certain areas. Learning Deep Architectures for AI discusses the motivations for and principles of learning algorithms for deep architectures. By analyzing and comparing recent results with different learning algorithms for deep architectures, explanations for their success are proposed and discussed, highlighting challenges and suggesting avenues for future explorations in this area.