Structure notation of dynamic systems: A pictorial language approach

M. A. Rodrigues*, C. Loftus, M. Ratcliffe, Y. F. Li

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Proceeding (Non-Journal item)


This paper describes a visual programming environment called PROX (Pictorial Programming for Control Systems and Simulation) and its application to the development of software code for dynamic systems. We show how PROX is used for modeling and simulating a continuous process of interdependent variables with emphasis on user software development. Some of PROX key features are highlighted, such as encouraging users to consider the structure of the model and the interdependency of variables through feedback processes as the cause for behaviour in dynamic systems. PROX is an example of how Software Engineering (SE), Artificial Intelligence (AI) and model building can be integrated into a single framework to help users to generate code and create their own understanding of dynamic systems. PROX is written in Pop-11 under X-Windows allowing the user to write application programs by simply connecting icons. As the building blocks are hooked together, PROX creates equations and procedures behind the scenes and, as soon as the connections are drawn, programs can be run immediately and variables can be plotted. In this way, assumptions about the structure of the system being modeled can rapidly be tested without the need for extensive recompilation.

Original languageEnglish
Title of host publicationIEEE International Conference on Computer Languages
PublisherIEEE Press
Number of pages10
ISBN (Print)0818656425, 9780818656422
Publication statusPublished - 16 May 1994
EventProceedings of the 1994 International Conference on Computer Languages - Toulouse, Fr
Duration: 16 May 199419 May 1994

Publication series

NameIEEE International Conference on Computer Languages
ISSN (Print)1074-8970


ConferenceProceedings of the 1994 International Conference on Computer Languages
CityToulouse, Fr
Period16 May 199419 May 1994


Dive into the research topics of 'Structure notation of dynamic systems: A pictorial language approach'. Together they form a unique fingerprint.

Cite this