منابع مشابه
Systems Modeling in Ptolemy
Synchronous Dataflow (SDF) is useful in modeling communications and signal processing systems. We describe a communication actor library based on the SDF semantics in Ptolemy II and show how to use these actors to simulate communication systems. However, many communication and signal processing systems nowadays use adaptive algorithms and control protocols. These sometimes violate SDF principle...
متن کاملModal Models in Ptolemy
Ptolemy is an open-source and extensible modeling and simulation framework. It offers heterogeneous modeling capabilities by allowing different models of computation to be composed hierarchically in an arbitrary fashion. This paper describes modal models, which allow to hierarchically compose finite-state machines with other models of computation, both untimed and timed. The semantics of modal ...
متن کاملDynamic Dataflow Modeling in Ptolemy
Dataflow process networks are a special case of Kahn process networks (PN). In dataflow process networks, each process consists of repeated firings of a dataflow actor, which defines a quantum of computation. Using this quantum avoids the complexities and context switching overhead of process suspension and resumption incurred in most implementations of Kahn process networks. Instead of context...
متن کاملDistributed Execution of Ptolemy Models
In this paper, we offer an overview of distributed model execution with Ptolemy. Our discussion focuses on the Process Network domain, while the platform that we propose is domain-independent. Components such as DNS and PtAgents are introduced as separate processes in addition to Ptolemy with models running in it. They provide services important to the execution of the system, such as dynamic n...
متن کاملPtolemy Relations for Punctured Discs
We construct frieze patterns of type DN with entries which are numbers of matchings between vertices and triangles of corresponding triangulations of a punctured disc. For triangulations corresponding to orientations of the Dynkin diagram of type DN , we show that the numbers in the pattern can be interpreted as specialisations of cluster variables in the corresponding Fomin-Zelevinsky cluster ...
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ژورنال
عنوان ژورنال: Archiv der Mathematik
سال: 2012
ISSN: 0003-889X,1420-8938
DOI: 10.1007/s00013-012-0398-7