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Evaluation of software tools for formative assessment of control topics

IFAC-PapersOnLine 2019年第9期52卷 292-297页

作者： J.A. Rossiter Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD UK

This paper discusses some of the reasons for and consequences of changing assessment types away from traditional paper based exams. More specifically, consideration is given to the quiz environments available on virtual learning environments. Of particular interest to the reader are two core aspects: (i) the authenticity of the assessment for holistic assessment and (ii) managing student expectations of the process. The latter of these is the most challenging.

关键词： Automated assessment software tools in control student expectations

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The Combination of Two control Strategies for Series Hybrid Electric Vehicles

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IEEE/CAA Journal of automatica Sinica 2019年第2期6卷 596-608页

作者： Can Luo Zhen Shen Simos Evangelou Gang Xiong Fei-Yue Wang State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Cloud Computing Center Chinese Academy of Sciences IEEE Department of Electrical and Electronic Engineering Imperial College London Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Qingdao Academy of Intelligent Industries

With most countries paying attention to the environment protection, hybrid electric vehicles have become a focus of automobile research and development due to the characteristics of energy saving and low emission. Power follower control strategy(PFCS) and DC-link voltage control strategy are two sorts of control strategies for series hybrid electric vehicles(HEVs). Combining those two control strategies is a new idea for control strategy of series hybrid electric vehicles. By tuning essential parameters which are the defined constants under DClink voltage control and under PFCS, the points of minimum mass of equivalent fuel consumption(EFC) corresponding to a series of variables are marked for worldwide harmonized light vehicles test procedure(WLTP). The fuel economy of series HEVs with the combination control schemes performs better compared with individual control scheme. The results show the effects of the combination control schemes for series HEVs driving in an urban environment.

关键词： DC-Link voltage control power follower control strategy series hybrid electric vehicles tuning

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The Polar Solvent Application Method for Organic Transparent Conductive Film Produced by an Inkjet Printing Method

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Advances in Materials Physics and Chemistry 2020年第1期10卷 17-25页

作者： Atsushi Nitta Naohiko Chosa Kazuhiro Takeda Department of Electronic Control Engineering National Institute of Technology Kagoshima College Kirishima Japan Advanced Mechanical and Electronic Systems Engineering National Institute of Technology Kagoshima College Kirishima Japan Department of Information Engineering National Institute of Technology Kagoshima College Kirishima Japan

In recent years, flexible electronic devices have attracted much attention. Accordingly, flexible transparent conductive films are being researched actively. The commonly used indium tin oxide (ITO) transparent conductive film has limited flexibility. Therefore, we focused on poly(3,4-ethylenedioxythio- phene)/poly(styrenesulfonate)(PEDOT:PSS) as a substitute material for ITO and are engaged in producing flexible transparent conductive film using inkjet printers. To improve the characteristics of the transparent conductive film produced by inkjet printing, based on prior research, we found that cleaning the film substrate with ultraviolet/ozone (UV/O3) and post-deposition annealing and treatment using polar solvents are effective for thin films. In this study, we examined the method of applying the polar solvent. As a result, we were able to improve the homogeneity of the thin film surface by applying the polar solvent to each thin film lamination layer. The resulting characteristics obtained for a three-layer printed PEDOT:PSS thin film with polar solvent coating were resistivity of 1.49 × 10-3 Ω·cm and transmittance of 84.6%. However, we found that the surface condition changed depending on the processing method, affecting the rate of visible light transmittance.

关键词： PEDOT:PSS Inkjet Printing Transparent Conductive Film Flexible Devices

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A Generalized Probabilistic Monitoring Model with Both Randomand Sequential Data

arXiv

引用

arXiv 2022年

作者： Yu, Wanke Wu, Min Huang, Biao Lu, Chengda The School of Automation China University of Geosciences Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan430074 China The Department of Chemical and Materials Engineering University of Alberta EdmontonABT6G 2G6 Canada

Many multivariate statistical analysis methods and their corresponding probabilistic counterparts have been adopted to develop process monitoring models in recent decades. However, the insightful connections between them have rarely been studied. In this study, a generalized probabilistic monitoring model (GPMM) is developed with both random and sequential data. Since GPMM can be reduced to various probabilistic linear models under specific restrictions, it is adopted to analyze the connections between different monitoring methods. Using expectation maximization (EM) algorithm, the parameters of GPMM are estimated for both random and sequential cases. Based on the obtained model parameters, statistics are designed for monitoring different aspects of the process system. Besides, the distributions of these statistics are rigorously derived and proved, so that the control limits can be calculated accordingly. After that, contribution analysis methods are presented for identifying faulty variables once the process anomalies are detected. Finally, the equivalence between monitoring models based on classical multivariate methods and their corresponding probabilistic graphic models is further investigated. The conclusions of this study are verified using a numerical example and the Tennessee Eastman (TE) process. Experimental results illustrate that the proposed monitoring statistics are subject to their corresponding distributions, and they are equivalent to statistics in classical deterministic models under specific restrictions. Copyright © 2022, The Authors. All rights reserved.

关键词： Process monitoring

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A compositional sheaf-theoretic framework for event-based systems (extended version)

arXiv

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arXiv 2020年

作者： Zardini, Gioele Spivak, David I. Censi, Andrea Frazzoli, Emilio ETH Zürich Institute for Dynamic Systems and Control Zürich Switzerland Massachusetts Institute of Technology Department of Mathematics Cambridge United States

A compositional sheaf-theoretic framework for the modeling of complex event-based systems is presented. We show that event-based systems are machines, with inputs and outputs, and that they can be composed with machines of different types, all within a unified, sheaf-theoretic formalism. We take robotic systems as an exemplar of complex systems and rigorously describe actuators, sensors, and algorithms using this framework. © 2020, CC BY.

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IEDQN: Information Exchange DQN with a Centralized Coordinator for Traffic Signal control

IEDQN: Information Exchange DQN with a Centralized Coordinat...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： Donghan Xie Zhi Wang Chunlin Chen Daoyi Dong Department of Control and Systems Engineering Nanjing University Nanjing China School of Engineering and Information Technology University of New South Wales Canberra Australia

ISBN: (数字)9781728169262

ISBN: (纸本)9781728169279

Finding the optimal control strategy for traffic signals, especially for multi-intersection traffic signals, is still a difficult task. The use of reinforcement learning (RL) algorithms to this problem is greatly limited because of the partially observable and nonstationary environment. In this paper, we study how to eliminate the above influence from the environment through communication among agents. The proposed method, called Information Exchange Deep Q-Network (IEDQN), has a learning communication protocol, which makes each local agent pay unbalanced and asymmetric attention to other agents' information. Besides the protocol, each agent has the ability to abstract local information from its own history data for interacting, which means that the communication can avoid the dependent instant information and it is robust to the potential time delay of communication. Specifically, by alleviating the effects of partial observation, experience replay can recover to good performance. We evaluate IEDQN via simulation experiments in the simulation of urban mobility (SUMO) in a traffic grid, and it outperforms the comparative multi-agent RL (MARL) methods in both efficiency and effectiveness.

关键词： Protocols Information exchange Receivers control systems Task analysis Learning (artificial intelligence)

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Reinforcement learning based racing car control 16

Reinforcement learning based racing car control

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16th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, VSDIA 2018

作者： Aradi, Szilárd Tari, Balázs Bécsi, Tamás Gáspár, Péter Department of Control for Transportation and Vehicle Systems Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics BudapestH-1521 Hungary

In the field of autonomous vehicle control the ideal trajectory planning problem is of great interest. In this paper, the results of a machine learning based race track control are presented. The models of the race track, the vehicle and the sensors are provided by TORCS, The Open Racing Car Simulator. The control of the vehicle is realized with a deep dense neural network. The aim of the research is to define a learning algorithm and reward system ensuring that the learning agent develops high-level driving skills from scratch without a prior knowledge. The developed system can be seen as an end-to-end black box control, though its performance is compared to other reference methods. © 2019 Budapest University of technology and Economics. All rights reserved.

关键词： Reinforcement learning

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Taxifolin attenuates inflammation via suppressing MAPK signal pathway in vitro and in silico analysis

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Chinese Herbal Medicines 2022年第4期14卷 554-562,F0002页

作者： Xingyan Zhang Xiaoyan Lian Huling Li Wenjing Zhao Xin Li Fujun Zhou Yutong Zhou Tao Cui Yuli Wang Changxiao Liu Key Laboratory of Quality-marker of Traditional Chinese Medicines Tianjin Institute of Pharmaceutical Research Co.Ltd.Tianjin 300462China Center for Drug Evaluation National Medical Products AdministrationBeijing 100022China Department of Pharmacology Tianjin Medical UniversityTianjin 300070China State Key Laboratory of Drug Delivery Technology and Pharmacokinetics Tianjin Institute of Pharmaceutical Research Co.Ltd.Tianjin 300462China Key Laboratory of Systems Bioengineering(Ministry of Education) School of Chemistry Engineering and TechnologyTianjin UniversityTianjin 300072China Research Unit for Drug Metabolism Chinese Academy of Medical SciencesBeijing 100730China Pharmaceuticai Armaceuticai DA REN TANG Group Corporation Limited Traditional Chinese Pharmacy Researchinstitute Tianjin 300457China Tianjin Key Laboratory of Quality Control in Chinese Medicine Tianjin 300457China

Objective:Taxifolin is a natural flavonoid compound that can be isolated from onions,grapes,oranges and *** also acts as a medicine food homology with extraordinary antioxidant and antiinflammatory *** study aims to explain the protective effects and potential mechanisms of taxifolin against inflammatory ***:Levels of interleukin(IL)-6,IL-1βand intracellular reactive oxygen species(ROS)were assessed in different time after the treatment of taxifolin in RAW264.7 cells induced by lipopolysaccharide(LPS).Subsequently,the m RNA and protein levels of inducible nitric oxide synthase(i NOS),vascular endothelial growth factor(VEGF),cyclooxygenase(COX)-2,tumor necrosis factor(TNF)-a and the phosphorylation expression levels of the MAPK signal pathway were also evaluated.A silico analysis was used to explain the binding situation for the investigation of taxifolin and MAPK signal *** then MAPK inhibitors were used to reveal the expression level of i NOS,VEGF,COX-2 and TNF-a in RAW264.7 ***:It was demonstrated that cell inflammatory damage induced by LPS was significantly alleviated after the treatment of ***,the m RNA and protein levels of i NOS,VEGF,COX-2 and TNF-a were reduced and the phosphorylation expression levels of the MAPK signal pathway were down-regulated remarkably as *** silico analysis,taxifolin could form a relatively stable combination with MAPK signal *** inhibitors showed increasing or decreasing effect in the m RNA levels of i NOS,VEGF,COX-2 and TNF-a,which suggesting that taxifolin down-regulated i NOS,VEGF,COX-2 and TNF-a expressions were not entirely through the MAPK ***:This finding demonstrated that taxifolin improved the inflammatory responses that partly involved in the phosphorylation expression level of MAPK signal pathway in RAW264.7 cells exposed to acute stress.

关键词： MAPK signal pathway molecular docking pro-inflammatory cytokines taxifolin

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Asymptotic Learning Requirements for Stealth Attacks on Linearized State Estimation

arXiv

引用

arXiv 2021年

作者： Sun, Ke Esnaola, Iñaki Tulino, Antonia M. Poor, H. Vincent The Department of Automatic Control and Systems Engineering University of Sheffield SheffieldS1 3JD United Kingdom The Department of Electrical and Computer Engineering Princeton University PrincetonNJ08544 United States The DIETI Università degli Studi di Napoli Federico II Naples80138 Italy The ECE Department New York University Tandon School of Engineering BrooklynNY10003 United States

Information-theoretic stealth attacks are data injection attacks that minimize the amount of information acquired by the operator about the state variables, while simultaneously limiting the Kullback-Leibler divergence between the distribution of the measurements under attack and the distribution under normal operation with the aim of controling the probability of attack detection. For Gaussian distributed state variables, attack construction requires knowledge of the second order statistics of the state variables, which is estimated from a finite number of past realizations using a sample covariance matrix. Within this framework, the attack performance is studied for the attack construction with the sample covariance matrix. This results in an analysis of the amount of data required to learn the covariance matrix of the state variables used on the attack construction. The ergodic attack performance is characterized using asymptotic random matrix theory tools, and the variance of the attack performance is bounded. The ergodic performance and the variance bounds are assessed with simulations on IEEE test systems. © 2021, CC BY-NC-ND.

关键词： Covariance matrix

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Integrating large remotely piloted vehicles into the controlled airspace 16

Integrating large remotely piloted vehicles into the control...

引用

16th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, VSDIA 2018

作者： Biró, Oszkár Szabó, Géza Department of Control for Transportation and Vehicle Systems Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics BudapestH-1521 Hungary

With the spread of the automation, feasibility of the autonomous vehicles turned into an emphasized research topic in the traffic industrial branches. As autonomous vehicles on the road are the subjects of such research, there are questions about the various unmanned aircrafts in aviation. However, these issues relate mainly to small vehicles, so called drones and their applicability in urban environments. The first purpose of this article is to define a category that is based on the characteristics of the current piloted cargo aircraft and later passenger aircrafts, but it is controlled by a remote pilot and at some flight stage (en-route) it also has the ability to perform various tasks autonomously. The advantages and limitations of this category (LRPV - Large Remotely Piloted Vehicle) are described, taking into account the benefits of their use in a fleet. With the introduction of this category, air traffic control issues are raised;the second chapter of this article will show a comparative analysis of aircrafts piloted normally or by remote pilots, in which the channels of communication are highlighted. The final part of this article discusses the failure modes of these communication channels, and the issues associated with the possible solutions. The formulation of these solutions includes further research options, such as the development of a new communication channel and interface between the pilots and air traffic controllers, or a new (possibly CPDLC-like) interface between the air traffic controller and the LRPV, which allows the controller to control the vehicle with limitations in possible emergency situations. © 2019 Budapest University of technology and Economics. All rights reserved.

关键词： Air traffic control

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