Natural Language Understanding NLU is a technology that obtains the semantic representation of natural language through grammar, semantics, and pragmatics analysis. It is an important step in natural language processing.

Natural language understanding and semantic acquisition

• Distributional semantics

• Frame semantics

• Model-theoretic semantics

Difficulties in natural language understanding

Natural language has the characteristics of ambiguity, context-relatedness, fuzziness, non-systematicness, close correlation with the environment, and a wide range of knowledge involved.

Applications of Natural Language Understanding

• Human-computer conversation: People can talk to computers through natural language;
• Answering questions: Computers can correctly answer questions entered in natural language;
• Abstract generation: The machine can generate a summary of the input text;
• Machine interpretation: The machine can repeat the input natural language information using different words and sentence patterns;
• Machine Translation: Machines can translate from one language into another.