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Book
Advances in state estimation, diagnosis and control of complex systems
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ISBN: 303052440X 3030524396 Year: 2021 Publisher: Cham : Springer International Publishing : Imprint: Springer,

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Abstract

This book presents theoretical and practical findings on the state estimation, diagnosis and control of complex systems, especially in the mathematical form of descriptor systems. The research is fully motivated by real-world applications (i.e., Barcelona’s water distribution network), which require control systems capable of taking into account their specific features and the limits of operations in the presence of uncertainties stemming from modeling errors and component malfunctions. Accordingly, the book first introduces a complete set-based framework for explicitly describing the effects of uncertainties in the descriptor systems discussed. In turn, this set-based framework is used for state estimation and diagnosis. The book also presents a number of application results on economic model predictive control from actual water distribution networks and smart grids. Moreover, the book introduces a fault-tolerant control strategy based on virtual actuators and sensors for such systems in the descriptor form. .


Book
The Impact of U.S.-China Tensions on U.S. Science
Authors: --- --- --- ---
Year: 2022 Publisher: Cambridge, Mass. National Bureau of Economic Research

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While there has been much discussion about recent investigations of foreign influence in research, very little work has quantified how these investigations have affected the productivity of U.S. scientists. We uncover evidence of adverse effects on U.S. scientists with collaborators in China using publication data from PubMed and Dimensions during 2010-2021. By studying the publication records of over 113,000 scientists during 2015-2021, we find that the investigations coincide with a decline in the productivity of scientists with previous collaborations with scientists in China in comparison to scientists with international collaborators outside of China, especially when the impact of publications (proxied by citations) is considered. The decline is particularly salient for fields with more pre-investigation NIH funding and U.S.-China collaborations. Our findings suggest that scientific research may be very sensitive to political tensions, and we further explore these mechanisms with qualitative interviews with scientists.

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