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arXiv 2019年

作者： Yi, Xinlei Zhang, Shengjun Yang, Tao Chai, Tianyou Johansson, Karl H. Division of Decision and Control Systems School of Electrical Engineering and Computer Science Kth Royal Institute of Technology Digital Futures Stockholm100 44 Sweden Department of Electrical Engineering University of North Texas DentonTX76203 United States State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China

This paper considers the distributed nonconvex optimization problem of minimizing a global cost function formed by a sum of local cost functions by using local information *** first propose a distributed first-order primal-dual algorithm. We show that it converges sublinearly to a stationary point if each local cost function is smooth and linearly to a global optimum under an additional condition that the global cost function satisfies the Polyak-Lojasiewicz condition. This condition is weaker than strong convexity, which is a standard condition for proving linear convergence of distributed optimization algorithms, and the global minimizer is not necessarily unique. Motivated by the situations where the gradients are unavailable, we then propose a distributed zeroth-order algorithm, derived from the proposed distributed first-order algorithm by using a deterministic gradient estimator, and show that it has the same convergence properties as the proposed first-order algorithm under the same conditions. The theoretical results are illustrated by numerical simulations. Copyright © 2019, The Authors. All rights reserved.

关键词： Cost functions

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Design optimization safety instrumented systems (SIS) 1

Design optimization safety instrumented systems (SIS)

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1st ISA Oman Automation Conference and Exhibition 2017

作者： Moorthy, B.G. Safety Systems and Standards Process Control Engineering Department Engineering Division Bahrain Petroleum Company Bahrain

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Integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals

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Angewandte Chemie 2023年第35期135卷

作者： Prof. Ming-Shui Yao Prof. Ken-ichi Otake Jiajia Zheng Masahiko Tsujimoto Dr. Yi-Fan Gu Lu Zheng Dr. Ping Wang Dr. Shivanna Mohana Dr. Mickaele Bonneau Tomoyuki Koganezawa Tetsuo Honma Hirotaka Ashitani Shogo Kawaguchi Prof. Yoshiki Kubota Prof. Susumu Kitagawa Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced Study Kyoto University Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Zhongguancun Beiertiao No. 1 Haidian District Beijing 100190 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Chinese Academy of Sciences No.19(A) Yuquan Road Shijingshan District Beijing 100049 China College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University Siping Road 1239 Shanghai 200092 China Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo 679-5198 Japan Department of Physical Science Graduate School of Science Osaka Prefecture University Osaka Japan Department of Physics Graduate School of Science Osaka Metropolitan University Osaka Japan

A one-stone, two-bird method to integrate the soft porosity and electrical properties of distinct metal–organic frameworks (MOFs) into a single material involves the design of conductive-on-insulating MOF ( c MOF-on- i MOF) heterostructures that allow for direct electrical control. Herein, we report the synthesis of c MOF-on- i MOF heterostructures using a seeded layer-by-layer method, in which the sorptive i MOF core is combined with chemiresistive c MOF shells. The resulting c MOF-on- i MOF heterostructures exhibit enhanced selective sorption of CO 2 compared to the pristine i MOF (298 K, 1 bar, S from 15.4 of ZIF-7 to 43.2–152.8). This enhancement is attributed to the porous interface formed by the hybridization of both frameworks at the molecular level. Furthermore, owing to the flexible structure of the i MOF core, the c MOF-on- i MOF heterostructures with semiconductive soft porous interfaces demonstrated high flexibility in sensing and electrical “shape memory” toward acetone and CO 2 . This behavior was observed through the guest-induced structural changes of the i MOF core, as revealed by the operando synchrotron grazing incidence wide-angle X-ray scattering measurements.

关键词： Conductivity Metal–Organic Frameworks Operando Shape Memory Soft Porosity

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Inside Back Cover: Integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals (Angew. Chem. Int. Ed. 35/2023)

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Angewandte Chemie International Edition 2023年第35期62卷

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Innenrücktitelbild: Integrated Soft Porosity and Electrical Properties of Conductive-on-Insulating Metal-Organic Framework Nanocrystals (Angew. Chem. 35/2023)

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Angewandte Chemie 2023年第35期135卷

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Challenges in Skill-based engineering of Industrial Automation systems∗ 23

Challenges in Skill-based Engineering of Industrial Automati...

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23rd IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2018

作者： Malakuti, Somayeh Bock, Jurgen Weser, Michael Venet, Pierre Zimmermann, Patrick Wiegand, Mathias Grothoff, Julian Wagner, Constantin Bayha, Andreas ABB Corporate Research Center Ladenburg Germany RD Corporate Research KUKA Deutschland GmbH Augsburg Germany Digital Engineering Fraunhofer IGCV Augsburg Germany Advanced Product Engineering Festo AG Co. KG Esslingen Germany Department of Process Control Engineering RWTH Aachen University Aachen Germany Model-based Systems Engineering Fortiss GmbH Munich Germany

ISBN: (纸本)9781538671085

Skill-based engineering is gaining attention as a means to increase flexibility and changeability in engineering industrial automation systems. This paper proposes the Skill-based engineering Model (SEM), which formally describes the core entities that play a role in skill-based engineering. Accordingly, we propose a four dimensional classification scheme for skills, and assess the suitability of a property model and OWL ontologies to describe and match skills. For each case, we identify a list of challenges that must be addressed to make skill-based engineering a reality in industrial automation systems. We believe that this paper can guide researchers to study various open aspects of skill-based engineering to make it feasible in complex industrial automation systems. © 2018 IEEE.

关键词： Ontology

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Performance behavior of prediction filters for respiratory motion compensation in radiotherapy

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Current Directions in Biomedical engineering 2017年第2期3卷 429-432页

作者： Jöhl, Alexander Berdou, Yannick Guckenberger, Matthias Klöck, Stephan Meboldt, Mirko Zeilinger, Melanie Tanadini-Lang, Stephanie Daners, Marianne Schmid Product Development Group Zurich Department of Mechanical and Process Engineering ETH Zurich Tannenstrasse 3 Zurich 8092 Switzerland Institute for Dynamic Systems and Control Department of Mechanical and Process Engineering ETH Zurich Switzerland Department of Radiation Oncology University Hospital Zurich University of Zurich Switzerland

Introduction: In radiotherapy, tumors may move due to the patient’s respiration, which decreases treatment accuracy. Some motion mitigation methods require measuring the tumor position during treatment. Current available sensors often suffer from time delays, which degrade the motion mitigation performance. However, the tumor motion is often periodic and continuous, which allows predicting the motion ahead. Method and Materials: A couch tracking system was simulated in MATLAB and five prediction filters selected from literature were implemented and tested on 51 respiration signals (median length: 103 s). The five filters were the linear filter (LF), the local regression (LOESS), the neural network (NN), the support vector regression (SVR), and the wavelet least mean squares (wLMS). The time delay to compensate was 320 ms. The normalized root mean square error (nRMSE) was calculated for all prediction filters and respiration signals. The correlation coefficients between the nRMSE of the prediction filters were computed. Results: The prediction filters were grouped into a low and a high nRMSE group. The low nRMSE group consisted of the LF, the NN, and the wLMS with a median nRMSE of 0.14, 0.15, and 0.14, respectively. The high nRMSE group consisted of the LOESS and the SVR with both a median nRMSE of 0.34. The correlations between the low nRMSE filters were above 0.87 and between the high nRMSE filters it was 0.64. Conclusion: The low nRMSE prediction filters not only have similar median nRMSEs but also similar nRMSEs for the same respiration signals as the high correlation shows. Therefore, good prediction filters perform similarly for identical respiration patterns, which might indicate a minimally achievable nRMSE for a given respiration pattern. © 2017 Alexander Jöhl et al., published by De Gruyter.

关键词： Time delay

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Secure analysis of dynamic networks under pinning attacks against synchronization

arXiv

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arXiv 2019年

作者： Li, Yuzhe Shi, Dawei Chen, Tongwen State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110004 State Key Laboratory of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Beijing100081 China Department of Electrical and Computer Engineering University of Alberta EdmontonABT6G 1H9 Canada

In this paper, we first consider a pinning node selection and control gain co-design problem for complex networks. A necessary and sufficient condition for the synchronization of the pinning controlled networks at a homogeneous state is provided. A quantitative model is built to describe the pinning costs and to formulate the pinning node selection and control gain design problem for different scenarios into the corresponding optimization problems. Algorithms to solve these problems efficiently are presented. Based on the developed results, we take the existence of a malicious attacker into consideration and a resource allocation model for the defender and the malicious attacker is described. We set up a leader-follower Stackelberg game framework to study the behaviour of both sides and the equilibrium of this security game is investigated. Numerical examples and simulations are presented to demonstrate the main results. Copyright © 2019, The Authors. All rights reserved.

关键词： Complex networks

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Viscous accelerating universe with non-linear and logarithmic equation of state fluid

arXiv

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arXiv 2019年

作者： Brevik, I. Makarenko, A.N. Timoshkin, A.V. Department of Energy and Process Engineering Norwegian University of Science and Technology TrondheimN-7491 Norway Tomsk State Pedagogical University Kievskaja Street 60 Tomsk634061 Russia Tomsk State University of Control Systems and Radio Electronics Lenin Avenue 40 Tomsk634050 Russia National Research Tomsk State University Lenin Avenue 36 Tomsk634050 Russia

We describe the accelerated expansion of the late-time universe using a generalized equation of state (EoS) when account is taken of bulk viscosity. We assume a homogeneous and isotropic Friedmann-Robertson-Walker spacetime. Solutions of the gravitational equations for dark energy are obtained in implicit form. Characteristic properties of the Universe evolution in the presence of the viscosity effects are discussed. Finally, the dynamics of the accelerated expansion of the viscous universe is discussed, on the basis of a modified logarithmic-corrected EoS. Copyright © 2019, The Authors. All rights reserved.

关键词： Equations of state

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Cost-optimal model predictive scheduling of home appliances

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IFAC-PapersOnLine 2017年第1期50卷 3344-3349页

作者： Bálint R. Magyar A. Hangos K.M. Department of Electrical Engineering and Information Systems Faculty of Information Technology University of Pannonia Veszprém Hungary Process Control Research Group HAS Research Institute for Computer Science and Control Budapest Hungary

A novel heuristic model-based optimal scheduling algorithm is proposed in this paper to operate heating and cooling type home appliances connected to smart grids where the price of the electrical energy is known in advance and temperature constraints are present. The properties and the use of the proposed algorithm are shown using a simple refrigerator model. The accuracy and the computational properties of the proposed method are compared to the schedule generated by the MPT toolbox. The algorithm works well with a relatively short prediction horizon using a fraction of the computing time needed for the MPT-based method. The robustness of the algorithm is also investigated with respect to the load of the refrigerator. It is shown that the designed schedule with an empty refrigerator is always suitable, yet not optimal, for any loaded case. © 2017

关键词： Demand side management Heuristics Model predictive control Scheduling algorithms Smart grids

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