Information Extraction

Extracting the information for the following fields

• sales forecasting

• industrial process control

• customer research

• data validation

• risk management

• target marketing

Because of their adaptive and non-linear nature they have also been used in a number of

control system application domains like,

• process control in chemical plants

• unmanned vehicles

• robotics

• consumer electronics

Applications of Natural Language Processing

• Machine Translation – Translation between two natural languages.

– See the Babel Fish translations system on Alta Vista.

• Information Retrieval – Web search (uni-lingual or multi-lingual).

• Query Answering/Dialogue – Natural language interface with a database system,

or a dialogue system.

• Report Generation – Generation of reports such as weather reports.

• Some Small Applications –

– Grammar Checking, Spell Checking, Spell Corrector

Machine Translation

• Machine Translation refers to converting a text in language A into the

corresponding text in language B (or speech).

• Different Machine Translation architectures are:

– interlingua based systems

– transfer based systems

• Challenges are to acquire the required knowledge resources such as mapping rules

and bi-lingual dictionary? By hand or acquire them automatically from corpora.

• Example Based Machine Translation acquires the required knowledge (some of it

or all of it) from corpora.