02-02-2012, 12:24 PM
NLP
Shadab Shaikh (208ce70)
Ankit Thakur (208ce72)
Vishwanath Acharya (208ce62)
Gaurav Date (208ce63)
Harichandran Nadar (208ce67)
What is NLP?
Natural Language Processing (NLP)
Computers use (analyze, understand, generate) natural language
Brief History of NLP
1940s –1950s: Foundations
Development of formal language theory.
Probabilities and information theory.
1957 – 1970s:
Use of formal grammars as basis for NLP.
Use of logic, logic based programming.
1970s – 1983:
Probabilistic methods for early speech recognition.
Discourse modeling.
1983 – 1993: Finite state models (morphology).
1994 – 1999: Strong integration of different techniques, different areas.
2000-2007: The Rise of Machine Learning, treebank, annotated corpus.
Renewed interest in unsupervised statistical approaches
HISTORY
Machine translation (MT)
Chomsky published Syntactic Structures
Speech recognition
ALPAC (Automatic Language Processing Advisory Committee )
Transformational model of linguistic competence.
Augmented Transition Networks ( Woods)
Concrete problems
The sentence "I never said she stole my money", this sentence could have several distinct meanings:
"I never said she stole my money" - Someone else said it, but I didn't.
"I never said she stole my money" - I simply didn't ever say it.
"I never said she stole my money" - I might have implied it in some way, but I never explicitly said it.
"I never said she stole my money" - I said someone took it; I didn't say it was she.
"I never said she stole my money" - I just said she probably borrowed it.
"I never said she stole my money" - I said she stole someone else's money.
"I never said she stole my money" - I said she stole something of mine, but not my money.
Shadab Shaikh (208ce70)
Ankit Thakur (208ce72)
Vishwanath Acharya (208ce62)
Gaurav Date (208ce63)
Harichandran Nadar (208ce67)
What is NLP?
Natural Language Processing (NLP)
Computers use (analyze, understand, generate) natural language
Brief History of NLP
1940s –1950s: Foundations
Development of formal language theory.
Probabilities and information theory.
1957 – 1970s:
Use of formal grammars as basis for NLP.
Use of logic, logic based programming.
1970s – 1983:
Probabilistic methods for early speech recognition.
Discourse modeling.
1983 – 1993: Finite state models (morphology).
1994 – 1999: Strong integration of different techniques, different areas.
2000-2007: The Rise of Machine Learning, treebank, annotated corpus.
Renewed interest in unsupervised statistical approaches
HISTORY
Machine translation (MT)
Chomsky published Syntactic Structures
Speech recognition
ALPAC (Automatic Language Processing Advisory Committee )
Transformational model of linguistic competence.
Augmented Transition Networks ( Woods)
Concrete problems
The sentence "I never said she stole my money", this sentence could have several distinct meanings:
"I never said she stole my money" - Someone else said it, but I didn't.
"I never said she stole my money" - I simply didn't ever say it.
"I never said she stole my money" - I might have implied it in some way, but I never explicitly said it.
"I never said she stole my money" - I said someone took it; I didn't say it was she.
"I never said she stole my money" - I just said she probably borrowed it.
"I never said she stole my money" - I said she stole someone else's money.
"I never said she stole my money" - I said she stole something of mine, but not my money.