There are three common approaches to the design of a simulator: event based approach, time based approach and the process based approach. The approach chosen when designing the model should be based on the characteristics of the system under study. One accepted approach of simulating an existing or developing architecture is trace-driven simulation. However, there are multiple problems while ap...

Event-driven simulators are an eeective way to behaviorally describe a system. Timing constraints are also an important component of a system description. Ptolemy, a powerful graphical simulation framework, provides an event-driven environment. OESIM, a text-based event-driven simulator, provides support for timing constraints. This paper describes a new Ptolemy environment, based on the existi...

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Classical linear time-invariant system simulation methods are based on a transfer function, impulse response, or input/state/output representation. We present a method for computing the response of a system to a given input and initial conditions directly from a trajectory of the system, without explicitly identifying the system from the data. Similarly to the classical approach for simulation,...

This chapter will introduce a novel data-driven simulation-based approach to study a dynamic system. Classification and regression trees a data mining method – is utilized to extract non-linear dynamics of the system based on “big data” collected over a long period of time. Kernel density estimates are used at the terminal nodes of the tree to model the probability distribution of the response ...

This chapter will introduce a novel data-driven simulation-based approach to study a dynamic system. Classification and regression trees a data mining method – is utilized to extract non-linear dynamics of the system based on “big data” collected over a long period of time. Kernel density estimates are used at the terminal nodes of the tree to model the probability distribution of the response ...

Web technologies|in particular linked Java servers and clients|allow new dynamic collaborative environments linking people and computers (collaboratories). We describe the architecture of a system, TANGOsim, that combines a Java collaborative environment with an executive providing general message lters, and an event driven simulator. The initial application is to command and control, but we de...