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• 扯扯机器学习的机遇
• 这门课的遗憾
• Matrix
• Linear Regression
• Sparsity
扯扯机器学习的机遇
• Big data– Opportunities
• Collective Intelligence– Crowdsourcing
– Search engine
– Challenges• Obtain knowledge
• Efficient computing
ˆ Ty x θ=
1 2[1, , ]Tx x x=
Induce Sparsity
• Introduce Sparsity-Inducing Norms– Sparsity via L1
– Sparsity via L1+L2
– Sparsity via L1/Lq
– ……..
– So many
• Some people also introduce sparsity from other perspective(see icml 2012 Zoubin)