The integration of renewable energy resources is challenging the traditional electricity network. To manage this, the smart grid has been defined as a cyber-physical system consisting of a physical component, which is...
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The integration of renewable energy resources is challenging the traditional electricity network. To manage this, the smart grid has been defined as a cyber-physical system consisting of a physical component, which is the electricity grid, and a computational component consisting of a communication network, metering network, and software components. Therefore, the smart grid can not just be seen as an electrical grid, but also as a system of software systems. Currently, control centers of the smart grid use an outage management software system to react to reported outages. In this paper, we present an extended outage management system that solves one main problem of the smart grid: software systems of the different domains are using different standards. Consequently, cross-domain data exchange and analysis are difficult. Therefore, we use the model-driven view-based VITRUVIUS approach to build a unified model of the smart grid. We then combine it with system stability analysis methods presented as views on the model. The result is a model-driven run-Time monitoring, analysis and control framework to increase the reliability of power supply. The evaluation with statistical data of the German power grid shows that outage time can be reduced with our approach.
Correctness of compilers is a vital precondition for the correctness of the software translated by them. In this paper, we present two approaches for the formalization of static single assignment (SSA) form together w...
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The success of the Internet as a medium for the supply and commerce of various kinds of goods and services leads to a fast growing number of autonomous and heterogeneous providers that offer and sell goods and service...
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ISBN:
(纸本)9729805067
The success of the Internet as a medium for the supply and commerce of various kinds of goods and services leads to a fast growing number of autonomous and heterogeneous providers that offer and sell goods and services electronically. The new market structures have already entered all kinds of markets. Approaches for market infrastructures usually try to cope with the heterogeneity of the providers by special wrapper components, which translate between the native protocols of the providers and the protocol of the market infrastructure. Enforcing a special interface to the provider limits their independence. Moreover, requirements such as a direct access to the internal business logic and databases of the providers or fix templates for internal datastructures are not suitable to establish a real open electronic market. A solution is the limitation of the access to the existing Web interface of the provider. This solution keeps the independence of the providers without burdening them additional work. However, for efficiency reasons, it keeps necessary to tailor a wrapper for each provider. What comes more, each change in the provider or its Web representation forces the modification of the existing wrapper or even the development of a new wrapper. In this paper, we present an approach for a wrapper for complex Web interfaces, which can easily be adapted to any provider just by adding a source description file. A tool allows the construction and modification of source descriptions without expert knowledge. Common changes in the Web representation can be detected and comprehended automatically. The presented approach has been applied to the market of scientific literature.
This paper describes Paradis-Net, a typed event-driven message-passing interface for designing distributed systems. Paradis-Net facilitates the development of both peer-to-peer and client-server architectures through ...
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Assessing numerous models from students in written exams or homework is an exhausting *** present an approach for a fair and transparent assessment of the completeness of models according to a natural language domain ...
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ISBN:
(纸本)9783642016479
Assessing numerous models from students in written exams or homework is an exhausting *** present an approach for a fair and transparent assessment of the completeness of models according to a natural language domain description. The assessment is based on checklists generated by the tool Sumo. Sumo directly works on an annotated version of the original exam text, so no 'gold standard' is needed.
Formal semantics of programming languages needs to model the potentially infinite state transition behavior of programs as well as the computation of their final results simultaneously. This requirement is essential i...
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Social network analysis (SNA) has attracted a lot of attention over the past years. Existing tools for SNA do not allow a user-centric analysis of the social neighborhood, i.e., the subgraph of the user's friends ...
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Acceleration structures are key to high performance parallel ray tracing. Maximizing performance requires configuring the degrees of freedom (e.g., construction parameters) these datastructures expose. Whether a para...
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Kernel techniques are among the most influential approaches in data science and statistics. Under mild conditions, the reproducing kernel Hilbert space associated to a kernel is capable of encoding the independence of...
During modern model-driven development processes, generators and higherorder transformations are used to create metamodels with short life cycles. Since these metamodels often differ from each other only in small part...
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ISBN:
(纸本)9783885796190
During modern model-driven development processes, generators and higherorder transformations are used to create metamodels with short life cycles. Since these metamodels often differ from each other only in small parts, instances as well as metamodels may be re-used if the difference between them does not lead to a violation of instance conformance. Existing co-evolution approaches describe this conformance based on change operators to a metamodel. Thus, they require that changes to the metamodels are carried out using special editors. To use this conformance for arbitrarily generated metamodels, we present a conformance validator for Ecore metamodels that is based on difference-based analysis. The validator has been implemented as a plug-in for the Eclipse framework. We demonstrate the completeness of our approach by covering state-of-the-art co-evolution change operators.
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