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Aachen: Colourdome
(2002)
The fourth industrial revolution presents a multitude of challenges for industries, one of which being the increased flexibility required of manufacturing lines as a result of increased consumer demand for individualised products. One solution to tackle this challenge is the digital twin, more specifically the standardised model of a digital twin also known as the asset administration shell. The standardisation of an industry wide communications tool is a critical step in enabling inter-company operations. This paper discusses the current state of asset administration shells, the frameworks used to host them and their problems that need to be addressed. To tackle these issues, we propose an event-based server capable of drastically reducing response times between assets and asset administration shells and a multi-agent system used for the orchestration and deployment of the shells in the field.
Abfallentsorgung und Geruchsemissionen. Tl.2. Minderungsmaßnahmen / Frechen, F. B.; Kettern, J. T.
(1995)
Abfallwirtschaft
(2000)
Abfallwirtschaft
(2005)
Abfallwirtschaft
(2004)
Abfallwirtschaft
(2002)
Abfallwirtschaft
(1998)
Abfallwirtschaft
(1996)
Abfallwirtschaft
(1994)
Abfallwirtschaft
(2007)
Abfallwirtschaft
(2012)
Abfallwirtschaft
(2007)
Abfallwirtschaft
(2015)
Abfallwirtschaft
(2012)
Abfallwirtschaft
(2009)
Abfallwirtschaft
(2015)
An increasing number of applications target their executions on specific hardware like general purpose Graphics Processing Units. Some Cloud Computing providers offer this specific hardware so that organizations can rent such resources. However, outsourcing the whole application to the Cloud causes avoidable costs if only some parts of the application benefit from the specific expensive hardware. A partial execution of applications in the Cloud is a tradeoff between costs and efficiency. This paper addresses the demand for a consistent framework that allows for a mixture of on- and off-premise calculations by migrating only specific parts to a Cloud. It uses the concept of workflows to present how individual workflow tasks can be migrated to the Cloud whereas the remaining tasks are executed on-premise.
Next-generation aircraft designs often incorporate multiple large propellers attached along the wingspan (distributed electric propulsion), leading to highly flexible dynamic systems that can exhibit aeroelastic instabilities. This paper introduces a validated methodology to investigate the aeroelastic instabilities of wing–propeller systems and to understand the dynamic mechanism leading to wing and whirl flutter and transition from one to the other. Factors such as nacelle positions along the wing span and chord and its propulsion system mounting stiffness are considered. Additionally, preliminary design guidelines are proposed for flutter-free wing–propeller systems applicable to novel aircraft designs. The study demonstrates how the critical speed of the wing–propeller systems is influenced by the mounting stiffness and propeller position. Weak mounting stiffnesses result in whirl flutter, while hard mounting stiffnesses lead to wing flutter. For the latter, the position of the propeller along the wing span may change the wing mode shapes and thus the flutter mechanism. Propeller positions closer to the wing tip enhance stability, but pusher configurations are more critical due to the mass distribution behind the elastic axis.
Absatzkanäle kaum verknüpft
(2011)
Abschlussarbeiten FAQ / FGA
(2006)
Abschlussbericht zum Zeichnungssystem Freedraft zur rechnerunterstuetzten Zeichnungserstellung
(1977)