模型

心智模型

数学模型、概率模型

• What is a “ model”
  • An imaginary abstract and simplified version of a subject
  • Makes mathematical calculation feasible
• Probabilistic model
  • Calculate the probability of a random event
• Take probabilistic language modelling for example:
  • Assign a probability to words or sentences
  • e.g. P (I know it) > P (eye no it)

Maximum Likelihood Estimation (MLE) 最大似然估计