Introduction to Artificial Intelligence - Old Questions

4.  Define learning. Why learning frame work is required? Explain about learning frame work with block diagram and examples.

Learning is acquiring new or modifying existing knowledge, behaviors, skills and may involve synthesizing different types of information.

A Machine Learning Framework is an interface, library or tool which allows developers to more easily and quickly build machine learning models. Learning framework is required because it provides a clear, concise way for defining machine learning models using a collection of pre-built, optimized components. 

Learning Framework:

It consists of the following components:

• Learning element: This element is responsible for making improvements.
• Performance element: It is responsible for selecting external actions according to the percepts it takes.
• Critic: It provides feedback to the learning agent about how well the agent is doing, which could maximize the performance measure in the future.
• Problem Generator: It suggests actions which could lead to new and informative experiences.

Example:

Performance element: turning, accelerating, breaking are the performance elements on road.

Learning element: learn rules for breaking, accelerating, learn geography of the city.

Critic: quick right turn across three lanes of traffic, observes reaction of other drivers.

Problem generator: Try south city road.