Date: Feb 10, 2013 5:28 PM
Subject: Re: Sets as Memory traces.

On Feb 10, 11:13 pm, Graham Cooper <> wrote:
> "temporal reasoning in artificial intelligence"
> About 1,950,000 results (0.40 seconds)
> Time and Time Again: The Many Ways to Represent Time
> James F Allen
> The University of Rochester
> I. Representations Based on Dating Schemes
> A good representation of time for instantaneous events, if it is
> possible, is using an absolute dating system. This involves time
> stamping each event with an absolute real-time, say taken off the
> system clock on the machine, or some other coarser-grained system such
> as we use for dating in everyday life. For instance, a convenient
> dating scheme could be a tuple consisting of the year
> II. Constraint Propagation Approaches
> There has been a considerable amount of work in Artificial
> Intelligence in defining temporal reasoning systems that used the
> technique of constraint propagation. These systems use a graph-based
> representation where each time is linked to each other time with an
> arc labeled with the possible temporal relationships between the times
> III. Duration-Based Representations
> With the exception of the first technique using absolute dates, we
> have been ignoring the problem of representing temporal durations. In
> this section we will examine some representations that operate
> primarily using duration information. The basic technique for dealing
> with duration information is seen in PERT networks. This
> representation maintains a partial ordering of events in an acyclic
> directed graph that
> has both a distinguished beginning and ending event. Each node in the
> graph represents an event and has an associated duration.
> IV. Temporal Logics
> So far we have only discussed the representation of ...
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