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Mostrando ítems 171-177 de 177
Ponencia
Christiansen Grammar for Some P Systems
(Fénix Editora, 2005)
The main goal of this work is to formally describe P systems. This is a necessary step to subsequently apply Christiansen grammar evolution (an evolutionary tool developed by the authors) for automatic designing of P ...
Ponencia
Structured Modeling with Hyperdag P Systems: Part A
(Fénix Editora, 2009)
P systems provide a computational model based on the structure and interaction of living cells. A P system consists of a hierarchical nesting of cell-like membranes, which can be visualized as a rooted tree. Although ...
Ponencia
Covering Rules in P Systems: Some Preliminary Ideas
(Fénix Editora, 2004)
In this paper we propose a new kind of rules inside the regions of a P system. We have called them covering rules due to the fact that, if selected, they can manage all the objects of the region in an exhaustive manner ...
Ponencia
Cell Communication in Tissue P Systems and Cell Division in Population P Systems
(Fénix Editora, 2004)
Two classes of tissue P systems based on evolution communication rules are introduced, some results are proved, but many more are listed as further research problems. A framework to develop population P systems is de¯ned ...
Ponencia
Time-Driven Computations in P Systems
(Fénix Editora, 2006)
It is a well-known fact that the time of execution of a (biochemical) reaction depends on many factors, and, in particular, on the current situation of the whole system. With this motivation in mind, we propose a model ...
Ponencia
Simulating Avascular Tumors with Membrane Systems
(Fénix Editora, 2005)
Tumor growth has received a considerable attention by the scientific community. In the earliest stages of development, tumor growth seems to be regulated by direct diffusion of nutrients and wastes from and to surrounding ...
Ponencia
Ordinary Membrane Machines versus Other Mathematical Models of Systems Realizing Massively Parallel Computations
(Fénix Editora, 2008)
A comparison of ordinary membrane machines, understood as certain recursive families of deterministic P systems, with some other mathematical models of systems realizing massively parallel computations is discussed. These ...