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2021 China Automation Congress, CAC 2021

作者： Fu, Yuzhuo Liao, Xiaocun Lu, Ben Zou, Qianqian Zhang, Zhuoliang Ou, Yarning Zhou, Chao State Key Laboratory of Management and Control for Complex Systems Institute of Automation CAS Beijing100190 China School of Artificial Intelligence University of Chinese Academy of Sciences Beijing100049 China

ISBN: (纸本)9781665426473

Accurate localization of robots in a specific environment often requires the cooperation of multiple sensors, and how to establish a more general data fusion model is always a difficult problem. For the localization of robot fish in an indoor pool environment, this paper proposes an adaptive fusional algorithm based on fuzzy inference of dynamic weights. This paper firstly constructs a confidence probability table of sensors' signals based on the calibration data sets of BLE and UWB nodes at different distances, as the basis for updating the weights of the BLE or UWB nodes;secondly, the data obtained by each node in a single sampling period in the robot fish movement is vectorized to form a judgment matrix, and then the estimated distance is obtained by fuzzy inference together with the sensor weight;finally, the coordinates are calculated by the four-point positioning method. In this paper, more than 40 sets of experiments have been carried out with a simplified carangidae-like robot fish. The results show that the average positioning error is about 0.189m, which is 88.3% and 31.8% lower than that of using BLE only and using UWB only. In this paper, the fusional positioning method based on statistics combines the advantages of different sensors to reduce the data scale and achieve data denoising while fusing sensor data, which provides a reference for indoor positioning of robot fish and multi-sensor data fusion. © 2021 IEEE

关键词： Fuzzy inference

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Silver modified Cu/SiO2 catalyst for the hydrogenation of methyl acetate to ethanol

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1612-1622页

作者： Zhiheng Ren Muhammad Naeem Younis Hui Zhao Chunshan Li Xiangui Yang Erqiang Wang Gongying Wang Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChengdu 610041China National Engineering Laboratory for VOCs Pollution Control Material&Technology University of Chinese Academy of SciencesBeijing 101408China CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsThe National Key Laboratory of Clean and Efficient Coking TechnologyBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Zhongke Langfang Institute of Process Engineering Langfang 065000China Zhongke Langfang Institute of Process Engineering Zhengzhou 450000China School of Chemical Science University of Chinese Academy of SciencesBeijing 100049China

A series of silver modified Cu/SiO2 catalysts were synthesized with ammonia-evaporation method and applied in vapor-phase hydrogenation of methyl acetate to *** influence of additive‘Ag’on the structural evolution of catalyst was systematically studied by several characterization techniques,such as N2 adsorption–desorption,N2O titration,PXRD,FTIR,in-situ FTIR,H2-TPR,H2-TPD,XPS and *** showed that incorporation of a small amount of Ag could enhance the structural stability,and the strong interaction between Cu and Ag species was conducive to increase the dispersion of copper species and create a suitable Cu+/(Cu0+Cu+)ratio,which was proposed to be responsible for the improved catalytic *** maximum conversion of MA(94.1%)and selectivity of ethanol(91.3%)over optimized Cu-0.5 Ag/SiO2 and 120 h on stream without deactivation under optimal conditions demonstrates its excellent stability.

关键词： Copper Silver Hydrogenation Methyl acetate Ethanol Kinetic

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Comparisons between open-loop and feedback controls based on a coherent quantum control model

Comparisons between open-loop and feedback controls based on...

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Chinese control Conference (CCC)

作者： Hao Pan Bo Qi Lei Guo The Key Laboratory of Systems and Control Academy of Mathematics and Systems Science CAS Beijing 100190 China

Feedback plays an essential role in classical control theory, which has been investigated in depth. However, in quantum control theory, the study of feedback is still in its infancy. The paper continues to explore the fundamental characteristics of quantum feedback control for a typical coherent model based on the results of by highlighting the significant differences between quantum feedback control and classical feedback control due to quantum measurement. The paper compares the control performance of quantum feedback control and quantum open-loop control in the cases with and without environment-induced decoherence. It concludes that in some sense, the quantum feedback control is still superior to the quantum open-loop control despite the complicated tradeoff in the feedback case, and further points out that how the quantum measurement-induced-collapse can play a positive role in the quantum feedback control.

关键词： Feedback control Mathematical model Presses Stochastic processes Quantum mechanics Optics control theory

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Ser68 phosphoregulation is essential for CENP-A deposition,centromere function and viability in mice

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Science China(Life Sciences) 2022年第9期65卷 1881-1889页

作者： Yuting Liu Kehui Wang Li Huang Jicheng Zhao Xinpeng Chen Qiang Wu Zhouliang Yu Guohong Li National Laboratory of Bio-macromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Center for Disease Control and Prevention of PLA Beijing 100071China College of Life Sciences Hubei Normal UniversityHuangshi 435002China Center for Comparative Biomedicine Key Laboratory of Systems Biomedicine(Ministry of Education)Institute of Systems BiomedicineShanghai Jiao Tong UniversityShanghai 200240China

Centromere identity is defined by nucleosomes containing CENP-A,a histone H3 *** deposition of CENP-A at centromeres is tightly regulated in a cell-cycle-dependent *** previously reported that the spatiotemporal control of centromeric CENP-A incorporation is mediated by the phosphorylation of CENP-A ***,a recent report argued that Ser68 phosphoregulation is dispensable for accurate CENP-A ***,we report that the substitution of Ser68 of endogenous CENP-A with either Gln68 or Glu68 severely impairs CENP-A deposition and cell *** also find that mice harboring the corresponding mutations are ***,these results indicate that the dynamic phosphorylation of Ser68 ensures cell-cycle-dependent CENP-A deposition and cell viability.

关键词： centromere CENP-A cell cycle mitosis phosphorylation chromosome segregation

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First stirling-type cryocooler reaching lambda point of ~4He(2.17K) and its prospect in Chinese HUBS satellite project

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Science Bulletin 2019年第4期64卷 219-221页

作者： Jue Wang Changzhao Pan Tong Zhang Kaiqi Luo Xiaotong Xi Xianlin Wu Jianpeng Zheng Liubiao Chen Junjie Wang Yuan Zhou Hai Jin Wei Cui University of Chinese Academy of Sciences CAS Key Laboratory of Cryogenics Technical Institute of Physics and Chemistry Chinese Academy of Sciences Laboratoire National de Métrologie Et d'essais-Conservatoire National des Arts et Métiers (LNE-Cnam) State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Department of Physics and Center for Astrophysics Tsinghua University

The issue of "missing baryons” is always an unsolved mystery in galaxy cosmology, and an important reason for the great uncertainty of the galaxies' formation and evolution. To find the "missing" baryons, extra high-resolution spectral observation and imaging of the soft X-ray band (<1 kev) is required. However, the existing observation methods cannot meet this requirement. Therefore, Tsinghua University leads and proposes the Chinese "Hot Universe Baryon Surveyor (HUBS)" satellite program.

关键词： missing baryons HUBS missing

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Recent developments of the reconstruction in magnetic particle imaging

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Visual Computing for Industry,Biomedicine,and Art 2022年第1期5卷 290-302页

作者： Lin Yin Wei Li Yang Du Kun Wang Zhenyu Liu Hui Hui Jie Tian CAS Key Laboratory of Molecular Imaging the State Key Laboratory of Management and Control for Complex SystemsInstitute of AutomationChinese Academy of SciencesBeijing 100190China Beijing Key Laboratory of Molecular Imaging Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China Medical Imaging Center the First Affiliated HospitalJinan UniversityGuangdong 510632China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of MedicineBeihang UniversityBeijing 100083China

Magnetic particle imaging(MPI)is an emerging molecular imaging technique with high sensitivity and temporal-spatial *** reconstruction is an important research topic in MPI,which converts an induced voltage signal into the image of superparamagnetic iron oxide particles concentration *** reconstruction primarily involves system matrix-and x-space-based *** this review,we provide a detailed overview of the research status and future research trends of these two *** addition,we review the application of deep learning methods in MPI reconstruction and the current open sources of ***,research opinions on MPI reconstruction are *** hope this review promotes the use of MPI in clinical applications.

关键词： Magnetic particle imaging Image reconstruction System matrix X-space

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The Number of Leaders Needed for Consensus

The Number of Leaders Needed for Consensus

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Zhixin Liu Jing Han Xiaoming Hu Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceCAS Optimization and Systems Theory Royal Institute of Technology

In order to have a self-organized multi-agent system exhibit some expected collective behavior,it is necessary that some agents(called leaders) are informed about the expected behavior and able to *** a fundamental question is: how many such leaders are needed? Naturally the answer depends on the model *** this paper the model proposed by Vicsek et *** used for the *** analyzing the system dynamics and estimating the characteristics of the initial neighbor graph,a lower bound on the ratio of leaders is provided that guarantees the expected consensus being reached almost surely.

关键词： leader-follower consensus multi-agent systems

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Overview of deep learning

Overview of deep learning

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Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Xuedan Du Yinghao Cai Shuo Wang Leijie Zhang The State Key Laboratory of Management and Control for Complex Systems Institute of Automation CAS Beijing China

ISBN: (纸本)9781509044245

In recent years, deep learning has achieved great success in many fields, such as computer vision and natural language processing. Compared to traditional machine learning methods, deep learning has a strong learning ability and can make better use of datasets for feature extraction. Because of its practicability, deep learning becomes more and more popular for many researchers to do research works. In this paper, we mainly introduce some advanced neural networks of deep learning and their applications. Besides, we also discuss the limitations and prospects of deep learning.

关键词： Decision support systems Erbium Recurrent neural networks

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Kernel-Based Regularized Continuous-Time System Identification from Sampled Data 63

Kernel-Based Regularized Continuous-Time System Identificati...

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63rd IEEE Conference on Decision and control, CDC 2024

作者： Fang, Xiaozhu Mu, Biqiang Chen, Tianshi The Chinese University of Hong Kong School of Data Science Shenzhen Research Institute of Big Data Shenzhen518172 China Institute of Systems Science Academy of Mathematics and System Science Chinese Academy of Sciences Key Laboratory of Systems and Control of Cas Beijing100190 China

ISBN: (纸本)9798350316339

The identification of continuous-time (CT) systems from discrete-time (DT) input and output signals, i.e., the sampled data, has received considerable attention for half a century. The state-of-the-art methods are parametric methods and thus subject to the typical issues of parametric methods. In the last decade, a major advance in system identification is the so-called kernel-based regularization method (KRM), which is free of the issues of parametric methods. It is interesting to test the potential of KRM on CT system identification. However, very few results have been reported, mainly because the estimators have no closed forms for general CT input signals, except for some very special cases. In this paper, we show for KRM that the estimators have closed forms when the DT input signal has the typical intersample behavior, i.e., zero-order hold or band-limited, and this paves the way for the application of KRM for CT system identification. Numerical Monte Carlo simulations show that the proposed method is more robust than the state-of-the-art methods and more accurate when the sample size is small. © 2024 IEEE.

关键词： Continuous time systems

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Comparisons between open-loop and feedback controls based on a coherent quantum control model

Comparisons between open-loop and feedback controls based on...

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作者： Pan, Hao Qi, Bo Guo, Lei Key Laboratory of Systems and Control Academy of Mathematics and Systems Science CAS Beijing 100190 China

ISBN: (纸本)9787894631046

Feedback plays an essential role in classical control theory, which has been investigated in depth. However, in quantum control theory, the study of feedback is still in its infancy. The paper continues to explore the fundamental characteristics of quantum feedback control for a typical coherent model based on the results of [3] by highlighting the significant differences between quantum feedback control and classical feedback control due to quantum measurement. The paper compares the control performance of quantum feedback control and quantum open-loop control in the cases with and without environment-induced decoherence. It concludes that in some sense, the quantum feedback control is still superior to the quantum open-loop control despite the complicated tradeoff in the feedback case, and further points out that how the quantum measurement-induced-collapse can play a positive role in the quantum feedback control.

关键词： Open loop control

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