Active Representations for Language Acquisition and Use

摘要: This abstract describes recent work done within the NTL project at UC Berkeley and ICSI is intended as a companion submission to one entitled "Structured Connnectionist Modeling of Word Learning". Our presentation will detail some on developing structured connectionist representations that support range linguistic cognitive tasks. earlier (Bailey 97, Narayanan 97) produced unified representation verbs actions events they describe. model was partly inspired by results in high-level cortical motor control schemas (Steruberg et ai 78, Berustein 67), leading refer our verb x-schemas. X-schemas are parameterized routines with internal state execute when invoked. computational based extensions Petri net formalism. The most relevant features nets for purposes their ability states distributed system cleanly capture sequentiality, concurrency event-based asynchronous control. basic formalism include typed arcs, hierarchicai control, durative transitions, parameterization, (individual) tokens stochasticity. x-schema has been used an inductive bias models cross-linguistic acquisition hand action terms 97). We have also implemented version xschemas SHRUTI (Shastri al translation fairly straightforward efficient, suggesting x-schemas reasonable framework analyzing models. In work, we extended entire domains where same mechanism can be acting reasoning about dynamic environment. idea simple. assume people respect structures not linked body, here now. this case, carried out directly, but instead trigger simulations what would do imagined situation. physical world other i/o links representing planned action. There biological evidence view (Rizzolatti 96, Jeannerod Tanji 94) planning, recognition imagination share common representational substrate. simulation developed proven useful modeling metaphoric event descriptions such international economics. A crucial aspect its capability exploit domain knowledge spatial motion manipulation (implemented simulations) real-time contextsensitive simulative inference. Details found (Narayanan 1997). Additionally, vexing problems aspectuai composition seem lend themselves simple analyses interaction between verb-specific CONTROLLER captures important regularities evolution events. resulting elaborated constrained factors tense, temporal modifiers, nominals pragmatic context, providing rich supports inference language understanding. current status paper "A Dynamic Aspectual Composition". Both papers obtained from "http://www.icsi.berkeley.edu/NTL".