You are here: MIMS > EPrints
MIMS EPrints

2010.54: Modelling evolvable component systems

2010.54: Howard Barringer, Dov Gabbay and David Rydeheard (2009) Modelling evolvable component systems. Logic Journal of IGPL, 17. pp. 631-698. ISSN 1367-0751

Full text available as:

PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
801 Kb

Official URL: http://jigpal.oxfordjournals.org/cgi/content/abstract/17/6/631

Abstract

We develop a logical modelling approach to describe evolvable computational systems. In this account, evolvable systems are built hierarchically from components where each component may have an associated supervisory process. The supervisor's purpose is to monitor and possibly change its associated component. Evolutionary change may be determined purely internally from observations made by the supervisor or may be in response to external change. Supervisory processes may be present at any level in the component hierarchy allowing us to use evolutionary behaviour as an integral part of system design.

We model such systems in a revision-based first-order logical framework in which supervisors are modelled as theories which are at a logical meta-level to the theories of their components. This enables evolutionary change of the component to be induced by revision-based changes of the supervisor at the meta-level. In this way, the intervention required in evolutionary change is modelled purely logically.

The hierarchical component-based structure is fairly intricate so we present the basic ideas firstly in a simple setting, the well-known blocks world, before introducing tree-based structures to represent component hierarchies. We also introduce some techniques for establishing the behaviour of evolvable systems specified in this logical framework. The ideas and concepts are driven by example throughout. We conclude with a more substantial example, that of a simple model of an evolvable system of automated bank teller machines.

Item Type:Article
Uncontrolled Keywords:CICADA
Subjects:MSC 2000 > 68 Computer science
MIMS number:2010.54
Deposited By:Dr Margarita Korovina
Deposited On:13 June 2010

Download Statistics: last 4 weeks
Repository Staff Only: edit this item