17,127 research outputs found
A High-confidence Cyber-Physical Alarm System: Design and Implementation
Most traditional alarm systems cannot address security threats in a
satisfactory manner. To alleviate this problem, we developed a high-confidence
cyber-physical alarm system (CPAS), a new kind of alarm systems. This system
establishes the connection of the Internet (i.e. TCP/IP) through GPRS/CDMA/3G.
It achieves mutual communication control among terminal equipments, human
machine interfaces and users by using the existing mobile communication
network. The CPAS will enable the transformation in alarm mode from traditional
one-way alarm to two-way alarm. The system has been successfully applied in
practice. The results show that the CPAS could avoid false alarms and satisfy
residents' security needs.Comment: IEEE/ACM Internet of Things Symposium (IOTS), in conjunction with
GreenCom 2010, IEEE, Hangzhou, China, December 18-20, 201
Agent and cyber-physical system based self-organizing and self-adaptive intelligent shopfloor
The increasing demand of customized production results in huge challenges to the traditional manufacturing systems. In order to allocate resources timely according to the production requirements and to reduce disturbances, a framework for the future intelligent shopfloor is proposed in this paper. The framework consists of three primary models, namely the model of smart machine agent, the self-organizing model, and the self-adaptive model. A cyber-physical system for manufacturing shopfloor based on the multiagent technology is developed to realize the above-mentioned function models. Gray relational analysis and the hierarchy conflict resolution methods were applied to achieve the self-organizing and self-adaptive capabilities, thereby improving the reconfigurability and responsiveness of the shopfloor. A prototype system is developed, which has the adequate flexibility and robustness to configure resources and to deal with disturbances effectively. This research provides a feasible method for designing an autonomous factory with exception-handling capabilities
Guided Machine Learning for power grid segmentation
The segmentation of large scale power grids into zones is crucial for control
room operators when managing the grid complexity near real time. In this paper
we propose a new method in two steps which is able to automatically do this
segmentation, while taking into account the real time context, in order to help
them handle shifting dynamics. Our method relies on a "guided" machine learning
approach. As a first step, we define and compute a task specific "Influence
Graph" in a guided manner. We indeed simulate on a grid state chosen
interventions, representative of our task of interest (managing active power
flows in our case). For visualization and interpretation, we then build a
higher representation of the grid relevant to this task by applying the graph
community detection algorithm \textit{Infomap} on this Influence Graph. To
illustrate our method and demonstrate its practical interest, we apply it on
commonly used systems, the IEEE-14 and IEEE-118. We show promising and original
interpretable results, especially on the previously well studied RTS-96 system
for grid segmentation. We eventually share initial investigation and results on
a large-scale system, the French power grid, whose segmentation had a
surprising resemblance with RTE's historical partitioning
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