A representation of an actual or conceptual system.
A model is a representation of an actual or conceptual system that involves mathematics,
logical expressions, or computer simulations that can be used to predict how the system might perform or survive under various conditions or in a range of hostile environments.
A simulation is a method for implementing a model. It is the process of conducting experiments with a model for the purpose of understanding the behavior of the system modeled under selected conditions or of evaluating various strategies for the operation of the system within the limits imposed by developmental or operational criteria. Simulation may include the use of analog or digital devices, laboratory models, or “testbed” sites.
A semantic network is comprised of three basic elements:
- Concepts are any ideas or thoughts that have meaning
- Relations describe specific kinds of links or relationships between two concepts
- Instances (of a relationship) consist of two concepts linked by a specific relation.
Relationships in a semantic network go beyond the standard broader than, narrower than, or
related terms of thesauri. They may include specific whole-part relationships, cause-effect, parent-child, and many, many others.