The notion of associations is motivated and presented. This kind of association is seen as first class a concept in notations at both modeling and programming level. Among others the association support evolution of systems by adding descriptions and instantiations of associations to executing systems. 1 Motivation We briefly motivate our introduction of the notion of association by the problem...

Component-oriented programming promises to provide many of the bene ts that object-oriented programming has arguably failed to deliver: increased productivity, reliability, and exibility via increased reuse of third-party software. Unfortunately, it is not always clear how componentoriented programming di ers from object-oriented programming, or why component-oriented programming should succeed...

extended kalman filtering (ekf) is a nonlinear dynamic data reconciliation (nddr) method. one of its main advantages is its suitability for on-line applications. this paper presents an on-line nddr method using ekf. it is implemented for two case studies, temperature measurements of a distillation column and concentration measurements of a cstr. in each time step, random numbers with zero mean ...