机器学习介绍

• What is Machine Learning
• • Machine Learning ≈ Looking for a Function *From Data*
  • Framework
  • • Training
    • Testing
• Learning Map
• • Task
  • • Regression
    • Classification
  • Model
  • • Supervised Learning
    • Semi-supervised Learning
    • Transfer Learning
    • Unsupervised Learning
    • Stuctured Learning
    • Reinforcement Learning

What is Machine Learning

Machine Learning ≈ Looking for a Function From Data

• Speech Recognition

• Image Recognition

• Playing Go

• Dialogue System

Framework

Training

1. Define a set of function（Model）

2. Goodness of function f（Training Data： function input、function output）

   Pick the “Best” Function $f^{\ast }$

Testing

3. Using $f^{\ast }$ test

Learning Map

Task

Regression

Classification

• Binary Classification

  $Input\stackrel{Functionf}{}YesorNo$

• Multi-class Classification

​ $Input\stackrel{Functionf}{}Class1,Class2,...ClassN$

Model

Supervised Learning

• Linear Model

• Deep Learning

Semi-supervised Learning

Transfer Learning

Unsupervised Learning

Stuctured Learning

Reinforcement Learning