期刊名称：Annals of Spiru Haret University Economic Series
电子版ISSN：2393-1795
出版年度：2004
卷号：4
期号：1
语种：English
出版社：Editura Fundatiei Romania de Maine
摘要：In the theory of systems the reality is considered as a system of elements and phenomena which interract between each other having as a purpose a certain target. The description of those elements and phenomena reduced to their essential characteristics for a specialized activity field from the environmental reality - specialized system, defines a model. Modelling is a generally accepted technique by the specialists from all the domains of activity. Architectural models are created to help their users visualise the buildings. Mathematics models are created to analyse the line of the spaceships in the universe. In digital media and internet era software models are created to lead to the achievement of flexible systems, easily adapted to the fast changes of technology and to the users' demands.
