The commercial operation of the maglev train has strict requirements for reliability and safety suspension control system. However, due to a large number unmodeled dynamics system, it is difficult obtain precise mathematical model After system been operated long time with high load, will change wear, aging failure components, as well settlement line track. performance degraded. Therefore, this ...

In this paper we present RelBAC (for Relation Based Access Control), a model and a logic for access control which models communities, possibly nested, and resources, possibly organized inside complex file systems, as lightweight ontologies, and permissions as relations between subjects and objects. RelBAC allows us to represent expressive access control rules beyond the current state of the art...

Self-adaptive systems are capable of changing their behaviour at runtime to meet target constraints. An important research question is how quality of service models can inform runtime adaptation. We sketch one solution to this question by application of control theory to improve performance of queued systems by means of architectural adaptation. Previous research by our group has shown how Auto...

Nowadays many organizations experience security incidents due to unauthorized access to information. To reduce the risk of such incidents, security policies are often employed to regulate access to information. Such policies, however, are often too restrictive, and users do not have the rights necessary to perform assigned duties. As a consequence, access control mechanisms are perceived by use...