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Foundations of Artificial Intelligence & Machine Learning

Licence
OPEN CC-BY-4.0
Authors
Nidhi Sharma, Honey Singh, Ajay Sharma, Deepak Dagar
Published
2026-07-28 · Zenodo
Language
eng
Length
37166 words
Type
narrative text
Open ↗ Download Open original ↗
Challenges of Unsupervised Learning

Although unsupervised learning is powerful, it also presents difficulties. Because correct outputs are unavailable, evaluating model accuracy becomes more complex. The discovered patterns may not always have practical meaning. Interpreting clusters and hidden relationships often requires human expertise and domain knowledge. Reinforcement Learning Reinforcement Learning follows a completely different learning strategy compared to supervised and unsupervised learning. In reinforcement learning, an intelligent agent learns by interacting with an environment. The system performs actions and receives feedback in the form of rewards or penalties. The objective of the agent is to maximize rewards over time by learning the best possible strategy. This learning method resembles the way humans and animals learn through trial and error. Positive outcomes encourage repeated behavior, while negative outcomes discourage incorrect actions. Basic Components of Reinforcement Learning Reinforcement learning systems generally involve four major elements: Agent The intelligent system making decisions.