International Symposium on Chinese Spoken Language Processing
August 23-24, 2002
Improvements on a Belief Network Framework for Natural Language Understanding of Domain-Specific Chinese Queries
Bonnie Mok, Helen M. Meng
The Chinese University of Hong Kong, China
This paper extends our work on natural language understanding
(NLU) using Belief Networks, as proposed in . We have
previously devised a method for identifying the userís
communicative goal(s) out of a finite set of domain-specific goals.
The problem was formulated as making N binary decisions, each
performed by a Belief Network (BN). This formulation allows for
the identification of queries with multiple goals, as well as queries
with out-of-domain (OOD) goals. Our current work presents two
extensions: (i) migrating our investigation from English to
Chinese; and (ii) exploring the alternate formulation of goal
identification as making one N-ary decision by a single BN.
Experiments with the AITS (Air Travel Information System)
corpus showed that the N-ary formulation improved over the N
binary formulation in terms of single/multiple goal identification
accuracies and OOD rejection.
Mok, Bonnie / Meng, Helen M. (2002):
"Improvements on a belief network framework for natural language understanding of domain-specific Chinese queries",
In ISCSLP 2002, paper 107.