Model-based design constructs physical systems in two stages. First, a causal relation network (CRN) of quantities that entails the desired behavior is constructed from a domain model. Second, a physical system is designed by assembling components such that all the causal relations specified by the CRN are imposed. The Compositional Model-based Design method, CMD, simplifies the design of compl...

In den letzten Jahren haben sich die Situation und die Anforderungen in modernen IT Organisationen grundlegend geändert. Zu den drei wichtigsten Aspekten, denen IT Manager heutzutage begegnen müssen, gehören: "Höhere Anforderungen an die Datenverfügbarkeit und Wiederherstellungszeiten nach einem Datenverlust bzw. Systemausfall", "Jährlich stetig steigende Datenvolumina" und "Zunehmender Einsatz...

Two-phase flow regimes are affected by conduit position, alignment, geometry, flow direction, physical characteristics, and flow rate of each phase as well as the heat flux toward the boundaries. Due to the importance of two-phase flow, numerous regimes have been identified. The first step in studying micro-bubble formation inside a venturi tube is to recognize the type of flow regimes. In this...

Model order reduction techniques are known to work reliably for finite-element-type simulations of MEMS devices. These techniques can tremendously shorten computational times for transient and harmonic analyses. However, standard model reduction techniques cannot be applied if the equation system incorporates timevarying matrices or parameters that are to be preserved for the reduced model. At ...

Air traffic system is analyzed from the aspects of system's attributes internal operating mechanisms and external behaviors. A hybrid air traffic simulation model described by the combination of discrete event and continuoustime models is proposed. The simulation model uses Agent-based techniques to describe micro behaviors of the air traffic individuals and integrates micro behaviors into dyna...

Accurate loss reserves are essential for insurers to maintain adequate capital and to efficiently price their insurance products. Loss reserving for Property & Casualty insurance is usually based on macro-level models with aggregate data in a run-off triangle. The macro-level models may generate material errors in the reserve estimates when assumptions underlying the estimates evolve over time ...