Gerhard Kramler who give me the opportunity to work in this field and correct my Works. I own a large debt to my family that help me to finish my study. Thanks for the people who have supported me working on this thesis! Abstract 4 Abstract MDA(Model Driven Architecture) defines a software development process. Three models build the core of the MDA: PIM (Platform Independent Model), PSM (Platfo...

Model-driven architectures (MDA) separate the business or application logic from the underlying platform technology and represent this logic with precise semantic models. These models are supposed to span the entire life cycle of a software system and ease the software production and maintenance tasks. Consequently, tools will be needed that support these tasks. In this paper, we present a meth...

Not least due to the widespread use of meta modeling concepts, model transformation techniques have reached a certain level of maturity (Czarnecki and Helsen, 2006). Nevertheless, defining transformations in some application areas in our case business process modeling is still a challenge because current transformation languages provide general solutions but do not support issues specific to a ...

As model transformations become a more common tool in a software engineer’s toolbox, there is an increasing need for systematic development techniques for them. Among other things, it becomes increasingly important to be able to safely modularise a model transformation specification as well as to compose new transformations from pre-existing transformation modules. While some initial work has b...

it is extremely challenging to measure first-order rate coefficients for soil nitrate transformation processes directly, either in the laboratory or in the field. in this study, an improved inverse method was proposed to optimize the first-order rate coefficients by considering the intermediate changing processes of the integrated functions. a numerical experiment was designed to test the accur...