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The Prediction of the Epidemic Trend of COVID-19 Using Neural Networks

IFAC-PapersOnLine 2020年第5期53卷 857-862页

作者： Jing Yang Zhen Shen Xisong Dong Xiuqin Shang Wei Li Gang Xiong J. Yang is with the State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China and also with College of Information Sciences & Technology Beijing University of Chemical Technology Beijing 100029 China. Z. Shen is with the State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China and also with the Intelligent Manufacturing Center Qingdao Academy of Intelligent Industries Qingdao Shandong 266113 China. X. Dong X. Shang and W. Li are with the State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China. G. Xiong is with Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Beijing 100190 China and also with the Guangdong Engineering Research Center of 3D Printing and Intelligent Manufacturing Cloud Computing Center Dongguan Guangdong 523808 China.

In this paper, a BP neural network and an LSTM network are applied respectively to the prediction of Coronavirus Disease 2019 (COVID-19) in Wuhan, China and South Korea. The methods do not require specific theories of modelling and the predicted values can be obtained as long as the conventional parameters are set. The mean absolute percentage error (MAPE) of all the experiments are below 5% and the values of the determinable coefficient R are all larger than 0.9. The experiments show that the models can fit the actual values well and make relatively accurate predictions. As of March 29, 2020, the cumulative number of confirmed cases in Wuhan is expected to reach 50,068 using BP neural networks and 49,972 using LSTM network, respectively. As of April 13, 2020, the cumulative number of confirmed cases in South Korea is expected to reach 8,862 using BP neural networks and 8,716 using LSTM network, respectively. The models of neural networks are effective in predicting the trend of the COVID-19 epidemic, which is meaningful to prevent and control the epidemic.

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[email protected] 2 heterostructure as a highly efficient coreaction accelerator of electrocheluminescence for amplified immunosensing of DNA methylation

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Biosensors and Bioelectronics 2023年 222卷

作者： Yao Shi Jie Wu Wenxin Wu Nini Luo Hao Huang Yuhui Chen Jun Sun Qian Yu Hang Ao Qiqi Xu Xiaotian Wu Qianfeng Xia Huangxian Ju Key Laboratory of Tropical Translational Medicine of Ministry of Education NHC Key Laboratory of Tropical Disease Control School of Tropical Medicine and the Second Affiliated Hospital Hainan Medical University Haikou Hainan 571199 China State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing University Nanjing 210023 China Research & Development Center Canon Medical Systems (China) Co. LTD Beijing 100015 China

Electrocheluminescence analysis amplified by coreaction accelerators has experienced breakthrough in ultrasensitive detection of biomarkers. Herein, a highly efficient coreaction accelerator, two-dimensional layered MoSe 2 nanosheets loaded with gold nanoparticles ( [email protected] 2 heterostructure), is proposed to enhance the ECL efficiency of Ru(bpy) 3 2+ /tripropylamine (TPrA) system. The presence of AuNPs avoids the aggregation of MoSe 2 nanosheets, and improves the electrical conductivity of modified surface. The [email protected] 2 modified electrode also provides a large area for loading of abundant capture probe. MoSe 2 as an electroactive substrate can remarkably accelerate the generation of TPrA •+ radicals to react with electrooxidized Ru(bpy) 3 2+ , which achieves about 3.4-fold stronger ECL intensity. Thus, an enhanced ECL immunoassay method can be achieved after Ru(bpy) 3 2+ -doped silica nanoparticle labeled antibody (Ab 2 [email protected] 2 ) is captured to the modified electrode via immunological recognition. Using methylated DNA as a target, the immunosensor was prepared by binding capture DNA on [email protected] 2 modified electrode to successively capture the target, anti-5-methylcytosine antibody (anti-5mC) and Ab 2 [email protected] 2 . The proposed strategy could detect 0.26 fM 5 mC (3σ) with a detectable concentration range of 1.0 fM - 10 nM at methylated DNA. This immunosensor showed excellent selectivity, good stability and reproducibility, and acceptable recovery, indicating the broad prospects of the novel coreaction accelerator in clinical diagnosis.

关键词： Electrochemiluminescence Biosensors Coreaction accelerator [email protected] 2 heterostructures Immunosensors DNA methylation

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An exploratory study of three-dimensional MP-PIC-based simulation of bubbling fluidized beds with and without baffles

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Particuology 2018年第4期16卷 68-77页

作者： Shuai Yang Hao Wu Weigang Lin Hongzhong Li Qingshan Zhua State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sdences P.O. Box 353 Beijing 100190 China State Key Laboratory of Safety and Control for Chemicals SINOPEC Research Institute of Safety Engineering Qingdao 266071 China Department of Chemical and Biochemical Engineering Technical University of Denmark DK-2800 Kongens Lyngby Denmark Sino-Danish College University of Chinese Academy of Sciences Beijing 100049 China

In this study, the flow characteristics of Geldart A particles in a bobbling fluidized bed with and without perforated plates were simulated by the multiphase particle-in-cell （MP-PlC）-based Eolerian-Lagrangian method. A modified structure-based drag model was developed based on our previous work. Other drag models including the Parker and Wen-Yo-Ergon drag models were also employed to investigate the effects of drag models on the simulation results. Although the modified structure-based drag model better predicts the gas-solid flow dynamics of a baffle-free bubbling fluidized bed in comparison with the experimental data, none of these drag models predict the gas-solid flow in a baffled bobbling floidized bed sufficiently well because of the treatment of baffles in the Barracuda software. To improve the simulation accuracy, future versions of Barracuda should address the challenges of incorporating the bed height and the baffles.

关键词： BaffleGeldart A particles Bubbling fluidized beds Simulation Multi-phase particle-in-cell Computational particle fluid dynamics

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Simultaneous state and parameter estimation: The role of sensitivity analysis

arXiv

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arXiv 2020年

作者： Liu, Jianbang Gnanasekar, Aristarchus Zhang, Yi Bo, Song Liu, Jinfeng Hu, Jingtao Zou, Tao Key Laboratory of Networked Control Systems Shenyang Institute of Automation Chinese Academy of Sciences Shenyang110016 China Institute for Robotics & Intelligent Manufacturing Chinese Academy of Sciences Shenyang110016 China University of Chinese Academy of Sciences Beijing100049 China Department of Chemical & Materials Engineering University of Alberta EdmontonABT6G 1H9 Canada Key Laboratory of Energy Thermal Conversion & Control Southeast University Nanjing210096 China School of Mechanical and Electrical Engineering Guangzhou University Guangzhou510006 China

State and parameter estimation is essential for process monitoring and control. Observability plays an important role in both state and parameter estimation. In simultaneous state and parameter estimation, the parameters are often augmented as extra states of the original system. When the augmented system is observable, various existing state estimation approaches may be used to estimate the states and parameters simultaneously. However, when the augmented system is not observable, how we should proceed to maximally extract the information contained in the measured outputs is not clear. This paper concerns about simultaneous state and parameter estimation when the augmented system is not fully observable. Specifically, we first show how sensitivity analysis is related to observability of a dynamical system, and then illustrate how it may be used to select variables for simultaneous estimation. We also propose a moving horizon state estimation (MHE) design that can use the variable selection results in a natural way. Extensive simulations are carried out to show the efficiency of the proposed approach. Copyright © 2020, The Authors. All rights reserved.

关键词： Sensitivity analysis

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Heterogeneous hegselmann-krause dynamics with environment and communication noise

arXiv

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arXiv 2019年

作者： Chen, Ge Su, Wei Ding, Songyuan Hong, Yiguang National Center for Mathematics Interdisciplinary Sciences & Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China

The Hegselmann-Krause (HK) model is a well-known opinion dynamics, attracting a significant amount of interest from a number of fields. However, the heterogeneous HK model is difficult to analyze - even the most basic property of convergence is still open to prove. For the first time, this paper takes into consideration heterogeneous HK models with environment or communication noise. Under environment noise, it has been revealed that the heterogeneous HK model with or without global information has a phase transition for the upper limit of the maximum opinion difference, and has a critical noise amplitude depending on the minimal confidence threshold for quasi-synchronization. In addition, the convergence time to the quasi-synchronization is bounded by a negative exponential distribution. The heterogeneous HK model with global information and communication noise is also analyzed. Finally, for the basic HK model with communication noise, we show that the heterogeneous case exhibits a different behavior regarding quasi-synchronization from the homogenous case. Interestingly, raising the confidence thresholds of constituent agents may break quasi-synchronization. Our results reveal that the heterogeneity of individuals is harmful to synchronization, which may be the reason why the synchronization of opinions is hard to reach in reality, even within that of a small group. Copyright © 2019, The Authors. All rights reserved.

关键词： Synchronization

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Preface

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IOP Conference Series: Earth and Environmental Science 2022年第1期966卷

作者： Zhu, Tao Gao, Zhiwei Hoxha, Endrit Yang, Gang Sukharev, Sergii Dehghani, Mohammad Hadi Li, Xingwei Fai, Chow Ming Zhang, Rui Ren, Hongyu Luo, Yang Popescu, Mihaela Cao, Jingyu Institute of Atmospheric Environment Management and Pollution Control China University of Mining and Technology Beijing China Electrical Power and Control Systems Research Group Faculty of Engineering and Environment University of Northumbria Newcastle United Kingdom Graz University of Technology Austria College of Resources and Environment Southwest University China Department of Ecology and Environmental Protection Chemical Faculty State University «Uzhhorod National University» Uzhhorod Ukraine Department of Environmental Health Engineering School of Public Health Tehran University of Medical Sciences (TUMS) Iran College of Architecture and Urban-Rural Planning Sichuan Agricultural University China School of Engineering Monash University Malaysia Malaysia Center of Modern Biochemistry Experimental Teaching Department Guangdong Ocean University China School of Environment Harbin Institute of Technology China Hong Kong Productivity Council (HKPC) Hong Kong City University of Hong Kong Hong Kong Faculty of Electrical Engineering University of Craiova Craiova Romania Department of Building Environment and Energy Application Engineering College of Civil Engineering Hunan University China

2021 International Conference on Environmental engineering and Energy (ICEEE 2021) was held online in Wuhan, China, on November 20, 2021. ICEEE 2021 is co-sponsored by Modern International Green Culture Communication Association (MIGCCA), and the conference proceeding is published by IOP Publishing. ICEEE 2021 provides an excellent international forum for sharing knowledge and results in theory, methodology and applications of environmental engineering and energy. The conference looks for significant contributions to all major fields of environmental engineering and energy in theoretical and application aspects. The aim of the conference is to provide a platform to the global researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the fields. The ICEEE 2021 proceedings tend to collect the up-to-date, comprehensive and worldwide state-of-art knowledge on environmental engineering and energy. All of accepted papers were subjected to strict peer-reviewing by 2–5 expert reviewers. The papers have been selected for this volume because of quality and the relevance to the conference. We hope this book will not only provide the readers a broad overview of the latest research results, but also provide the readers a valuable summary and reference in these fields. COVID-19 cases were found in difference provinces, which were cluster of infection. In order to avoid virus' spreading, the organiser switched the conference to a virtual one. It was held online on November 20, 2021 via Tencent Meeting. The virtual conference consisted of Opening Speech (10 mins), Keynote Speeches (40 mins presentation + 10 mins Q&A), and Oral Presentation (15-20 mins presentation + 10 mins Q&A) and Concluding Remarks (5 mins). The number of attendees are more than expectation. ICEEE 2021 Organizing Committee List of Committee Members are available in the pdf.

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Approbation of the Measurement Method to Determining the Permittivity of Micro-and Nanopowders of Titanium Dioxide

Approbation of the Measurement Method to Determining the Per...

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2019 International Multi-Conference on engineering, Computer and Information Sciences, SIBIRCON 2019

作者： Malkin, Alexander Korotkov, Alexey Knyazev, Nikolay Kijko, Victor Pavlov, Alexander Engineering School of Information Technologies Ural Federal University Named after the First President of Russia B.N. Yeltsin Telecommunications and Control Systems Yekaterinburg Russia Ural Federal University Named after the First President of Russia B.N. Yeltsin Department of Chemical Technology of Ceramics and Refractory Materials Yekaterinburg Russia Siberian Federal University Krasnoyarsk Russia

ISBN: (纸本)9781728144016

In work were measured electrodynamic properties of the titanium dioxide nano-powders using the transmission line technique and the Nicholson-Ross-Weir mathematical model for calculation permittivity and permeability values. Were studied the influence of heat treatment of nano-powder of titanium dioxide on the electrodynamic properties. Have been tested a new method for fixing powder in the sample holder. © 2019 IEEE.

关键词： Permittivity

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Functional Synthetic Biology

arXiv

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arXiv 2022年

作者： Aldulijan, Ibrahim Beal, Jacob Billerbeck, Sonja Bouffard, Jeff Chambonnier, Gaël Delkis, Nikolaos Guerreiro, Isaac Holub, Martin Ross, Paul Selvarajah, Vinoo Sprent, Noah Vidal, Gonzalo Vignoni, Alejandro Systems Engineering Stevens Institute of Technology 1 Castle Point Terrace HobokenNJ07030 United States Intelligent Software & Systems Raytheon BBN Technologies 10 Moulton Street CambridgeMA02138 United States Molecular Microbiology Groningen Biomolecular Sciences and Biotechnology Institute University of Groningen Nijenborgh 7 Groningen9747 AG Netherlands Centre for Applied Synthetic Biology Department of Biology Concordia University 7141 Sherbrooke Street West MontréalQCH4B 1R6 Canada Department of Biological Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Plant and Environmental Biotechnology Laboratory Department of Biochemistry and Biotechnology University of Thessaly Viopolis Mezourlo Larissa41500 Greece iGEM Foundation 45 Prospect Street CambridgeMA02139 United States Delft University of Technology Van der Maasweg 9 2629 HZ Netherlands BioStrat Marketing 9965 Harbour Lake Circle Boynton BeachFL33437 United States Department of Chemical Engineering Imperial College London South Kensington Campus Exhibition Road SW7 2AZ United Kingdom Research Group School of Computing Newcastle University Devonshire Building Devonshire Terrace Newcastle Upon TyneNE1 7RU United Kingdom Synthetic Biology and Biosystems Control Lab Instituto de Automatica e Informatica Industrial Universitat Politecnica de Valencia Camino de Vera s/n Valencia46022 Spain

Synthetic biologists have made great progress over the past decade in developing methods for modular assembly of genetic sequences and in engineering biological systems with a wide variety of functions in various contexts and organisms. However, current paradigms in the field entangle sequence and functionality in a manner that makes abstraction difficult, reduces engineering flexibility, and impairs predictability and design reuse. Functional Synthetic Biology aims to overcome these impediments by focusing the design of biological systems on function, rather than on sequence. This reorientation will decouple the engineering of biological devices from the specifics of how those devices are put to use, requiring both conceptual and organizational change, as well as supporting software tooling. Realizing this vision of Functional Synthetic Biology will allow more flexibility in how devices are used, more opportunity for reuse of devices and data, improvements in predictability, and reductions in technical risk and cost. © 2022, CC BY.

关键词： Biological systems

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An Optimal control Design of Organic Ranking Cycle under Disturbances 37

An Optimal Control Design of Organic Ranking Cycle under Dis...

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37th Chinese control Conference, CCC 2018

作者： Wu, Xialai Xie, Lei Chen, Junghui Su, Hongye Li, Xiaochen Institute of Cyber-Systems and Control Zhejiang University State Laboratory of Industrial Control Technology Yuquan Campus Hangzhou310027 China Department of Chemical Engineering Chung-Yuan Christian University Chung-Li32023 Taiwan

ISBN: (纸本)9781538649688

T0614. A mechanistic nonlinear model of ORC is developed to predict the dynamic characters and an optimization problem of optimal control design is proposed to attain the optimal operating set-points and controller parameters simultaneously, which aims to maximize the waste heat recovery and guarantee the safe operation in the presence of disturbances. The performance comparison between optimal control design and conventional control design reflects the advantage of the optimal control design. © 2018 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Rankine cycle

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Unraveling Ultrafast Photoionization in Hexagonal Boron Nitride

arXiv

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arXiv 2021年

作者： Xue, Lianjie Liu, Song Hang, Yang Summers, Adam M. Wilson, Derrek J. Wang, Xinya Chen, Pingping Folland, Thomas G. Hachtel, Jordan A. Shi, Hongyu Hosseini-Zavareh, Sajed Das, Suprem R. Lei, Shuting Zhang, Zhuhua Sorensen, Christopher M. Guo, Wanlin Caldwell, Joshua D. Edgar, James H. Blaga, Cosmin I. Trallero-Herrero, Carlos A. Department of Physics Kansas State University ManhattanKS66506 United States Tim Taylor Department of Chemical Engineering Kansas State University ManhattanKS66506 United States J. R. Macdonald Laboratory Department of Physics Kansas State University ManhattanKS66506 United States State Key Laboratory of Mechanics and Control of Mechanical Structures Institute of Nano Science Nanjing University of Aeronautics and Astronautics Nanjing210016 China Advanced Laser Light Source and few-cycle Inc. Institut Nationale de la Recherche Scientifique 1650 Boul. Lionel-Boulet VarennesQCJ3X 1P7 Canada Department of Industrial and Manufacturing Systems Engineering Kansas State University ManhattanKS66506 United States Department of Mechanical Engineering Vanderbilt University NashvilleTN37212 United States Center for Nanophase Materials Science Oak Ridge National Laboratory Oak Ridge37830 United States Department of Electrical and Computer Engineering Kansas State University ManhattanKS66506 United States Department of Physics University of Connecticut StorrsCT06269 United States

The non-linear response of dielectrics to intense, ultrashort electric fields has been a sustained topic of interest for decades with one of its most important applications being femtosecond laser micro/nano-machining. More recently, renewed interests in strong field physics of solids were raised with the advent of mid-infrared femtosecond laser pulses, such as high-order harmonic generation, optical-field-induced currents, etc. All these processes are underpinned by photoionization (PI), namely the electron transfer from the valence to the conduction bands, on a time scale too short for phononic motion to be of relevance. Here, in hexagonal boron nitride, we reveal that the bandgap can be finely manipulated by femtosecond laser pulses as a function of field polarization direction with respect to the lattice, in addition to the field’s intensity. It is the modification of bandgap that enables the ultrafast PI processes to take place in dielectrics. We further demonstrate the validity of the Keldysh theory in describing PI in dielectrics in the few TW/cm2 regime. © 2021, CC BY.

关键词： Photoionization

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