Knowledge Modeling in Various applications in Traffic Systems
Knowledge Modelling in Various
applications in Traffic Systems
Presented by : Yomna Hassan
Submitted to : Dr. Hesham Hassan
Techniques of Knowledge Modelling
Difference in knowledge modelling techniques
Generic Tasks in Traffic Systems
CommonKADS in Traffic Systems
DVO CommonKADS model
Techniques of Knowledge Modelling
Generic Tasks focus mainly on knowledge part of the
CommonKADS includes the organizational structure
of the whole system, tasks and communications, and
CommonKADS is more adaptive to existence of
intelligence within the system structure
Difference in knowledge modelling
for interaction functions
for reasoning functions
task selected in feasibility study
and further detailed in
Task and Agent Models
In this modelling context, which reveals an activity based on experiences (i.e. cases) reusing
locate the incident reusing activity into the global control activity.
identify relevant descriptors of the incident case model.
identify discriminant index to organize the case base.
define a similarity metric for matching.
register knowledge necessary to adapt solution part of the selected case, in order to
solve the current problem.
Elicitation sessions of the expertise, in the control room, are based on different methods:
document analysis, interviews, repertory grids, traffic manager's activities analysis and
results of the activity (problem reports).
Each method presents an own goal and allows, generally, to obtain a particular type of
knowledge. Therefore, it is necessary to use these methods concurrently, one cancelling out
the drawbacks of others taken apart, benefiting the qualities of each one
From interviews with traffic management experts, we
have found that a large part of their knowledge is
episodic. That is, the expert solves a new problem by
relating the current network situation to his previous
These experiences are sometimes specific incidents,
with real dates and places, and sometimes general
classes of similar occasions.
Knowledge Elicitation (Cont’d)
Focus on human –computer not computer-computer
A restricted form of dynamic task assignment can be
Multi-partner transactions not dealt with naturally
Therefore a new model: coordination model is
Disadvantages of CommonKADS in
MAS-CommonKADS extends the knowledge
engineering methodology CommonKADS with
techniques from object oriented and protocol
Existence of dynamic traffic systems
Organization Creation for Traffic
The CommonKADS control structure
models for DVO identification and
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