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25th IEEE China Conference on System Simulation technology and its Application, CCSSTA 2024

作者： Tang, Xiaomin Li, Shanshan Ma, Lerong Qin, Qing Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing & Intelligent Control Tianjin China

ISBN: (纸本)9798350366600

The parameter settings of electrical stimulation techniques vary from person to person. Therefore, the transition from a fixed model to an individualized treatment plan is a major challenge in the clinical management of epilepsy. To fully identify the different epileptic states and provide a theoretical basis for individualized treatment, a highly robust Bagging classifier based on decision trees was used to classify the epileptic signals into four categories. First, four features such as standard deviation (Std), coefficient of variation (CV), logarithm of amplitude (Log) and interquartile range (IQR) are extracted from the epileptic signals as inputs to the classifier. Then, the optimal feature was selected by feature comparison experiments and the influence of different frequency bands on classification effect was explored by Discrete Wavelet Transformation (DWT). Five metrics, such as confusion matrix, accuracy, correctness, misclassification rate, and F1 score, are provided as evaluation metrics. Finally, the full-band data featuring Std_IQR gave the best classification with accuracy, precision, false positive rate and F1 score of 94.8864%, 94.9904%, 1.7045% and 94.8947%, respectively. Therefore, the method proposed in this paper can classify interictal, preictal, ictal and postictal epilepsy with high-quality. © 2024 IEEE.

关键词： Discrete wavelet transforms

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Unraveling the heterogeneity of solid electrolyte interphase kinetically affecting lithium electrodeposition on lithium metal anode

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Journal of Energy Chemistry 2023年第10期85卷 181-190,I0007页

作者： Mengyuan Zhou Yaqi Liao Longhui Li Ruoyu Xiong Guancheng Shen Yifu Chen Tianlun Huang Maoyuan Li Huamin Zhou Yun Zhang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Guangdong Key Laboratory of Modern Control Technology Institute of Intelligent ManufacturingGuangdong Academy of SciencesGuangzhou 510075GuangdongChina

The stability and uniformity of solid electrolyte interphase(SEI)are critical for clarifying the origin of capacity fade and safety issues for lithium metal anodes(LMA).However,understanding the interplay of SEI heterogeneity and Li electrodeposition is limited by the coupling of complex electrochemistry and mechanics ***,the correlation between the SEI failure behavior and Li deposition morphology is investigated through a quantitative electrochemical-mechanical *** local deformation and stress of SEI during Li electrodeposition identify that the heterogeneous interface between different components first *** with the well-known mechanical strength,component uniformity plays the most important role in the initial SEI failure and uneven Li deposition,and a relative component uniformity(p>0.01)represents a proper balance to ensure the stability of the naturally heterogeneous ***,the component regulation of SEI via the designed electrolyte experimentally demonstrates that improving component uniformity benefits SEI stability and the uniform Li electrodeposition for LMA,thereby increasing the capacity by~20%after 300 *** fundamental understandings and proposed strategy can be not only used to guide the SEI optimization via the electrolyte regulation,but also extended to the rational designs of artificial SEI for high-performance LMA.

关键词： Li metal anode Solid electrolyte interphase Component uniformity Electrochemical-mechanical model Failure mechanism

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A new multispectral line interpolation FFT power harmonic analysis algorithm based on the Rife-Vincent window 9

A new multispectral line interpolation FFT power harmonic an...

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9th Asia Conference on Power and Electrical Engineering, ACPEE 2024

作者： Liu, Ke Geng, Pulong Shi, Songyue Taiyuan University of Technology Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control Shanxi China

ISBN: (纸本)9798350309638

FFT [1] is widely used in signal processing and other fields. When FFT is used for power harmonic analysis, asynchronous sampling and fence effect can reduce the accuracy of FFT results. At present, most FFT problems are improved by combining window function with multispectral line interpolation [2]. In this article, a six-spectrum- line interpolating FFT algorithm based on 5-Term with Continuous First Derivative Rife-Vincent Window is proposed. Signal simulation results show that the six-spectrum -line interpolating FFT algorithm has high accuracy in amplitude, frequency and phase analysis of power harmonics. The absolute value of the relative error of the amplitude correction is less than 5.35E-08%,the absolute value of the relative error of the frequency correction is less than 4.84E-10%, and the absolute value of the relative error of the phase correction is less than 5.17E-08% under the simulation condition of odd harmonic signals of 1-17 order.. The improvement of harmonic analysis accuracy is much higher than that of six-spectrum-line interpolation FFT algorithm based on Blackman window. © 2024 IEEE.

关键词： Fast Fourier transforms

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Spectral Properties of Graph Matrices via Convergence Analysis of Linear Dynamical Systems 43

Spectral Properties of Graph Matrices via Convergence Analys...

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43rd Chinese control Conference, CCC 2024

作者： Wang, Zhiyu Liu, Tao Southern University of Science and Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Shenzhen China

ISBN: (纸本)9789887581581

This paper studies the spectral properties of two important graph matrices in the literature, known as the leader-follower matrices. These two matrices arise from various cooperative control problems of multi-agent systems in a leader-follower architecture, and in most cases, they are the keys to the solvability of these cooperative control problems. In contrast with the existing results, which appeal to the algebraic graph theory and matrix analysis tools, we reveal the spectral properties from the viewpoint of dynamical systems. In particular, the spectral properties of the two graph matrices are derived by analyzing the convergence of a continuous-time and a discrete-time linear system, respectively. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Continuous time systems

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Reactive Power Optimization Based on Tent-Chebyshev Switching Mapping Particle Swarm Optimization 4

Reactive Power Optimization Based on Tent-Chebyshev Switchin...

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4th International Conference on Energy Engineering and Power Systems, EEPS 2024

作者： Zhang, Jinhao Ye, Jianhua Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing and Intelligent Control Tianjin China

ISBN: (纸本)9798350366914

The multi-point access of large-scale integration of wind and solar energy has brought negative effects such as voltage over-limit to the operation of the distribution network, which increases the difficulty of reactive power optimization. In order to solve this problem, an improved particle swarm optimization scheme based on Tent-Chebyshev fusion switching is proposed. When the Tent chaotic mapping function is used to calculate the initial position of the particles, the Chebyshev chaotic mapping function is used to introduce random disturbance to the particles trapped in the fixed point in the population, so that they can re-enter the chaotic state. It mitigates the risk of converging into local optima, minimizes the network loss and voltage deviation of the distribution network system. The research results are verified through the IEEE33-node example, demonstrating the feasibility and effectiveness of the proposed method in addressing the reactive power optimization problem. © 2024 IEEE.

关键词： Particle swarm optimization (PSO)

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Human Reliability Analysis of Professional Theater Based on CREAM

Human Reliability Analysis of Professional Theater Based on ...

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2024 International Conference on Culture-Oriented Science and technology, CoST 2024

作者： Wang, Huiqin Wang, Huiqi Ren, Hui Ministry of Culture and Tourism Key Laboratory of Acoustic Visual Technology and Intelligent Control System Beijing China

ISBN: (纸本)9798350380347

In the context of human/equipment interaction processes, human error has become a significant factor influencing performance risk in professional theaters. To address this issue, the Cognitive Reliability and Error Analysis Method (CREAM) is integrated with fuzzy inference to assess the human reliability of theater staff and predict the probability of human error (HEP). Additionally, Grey Relational Analysis (GRA) is introduced to determine the weights of Common Performance Conditions (CPCs) within CREAM. Through this methodological framework, human reliability analysis of theater operators is conducted, enabling the prediction of human error rates across various scenarios. Subsequently, corresponding measures are provided, culminating in an effective solution to enhance performance safety within theatrical environments. © 2024 IEEE.

关键词： Reliability analysis

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Relaxed Stability Criteria for Time-Delay Systems:A Novel Quadratic Function Convex Approximation Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 996-1006页

作者： Shenquan Wang Wenchengyu Ji Yulian Jiang Yanzheng Zhu Jian Sun College of Electrical and Electronic Engineering Changchun University of TechnologyChangchun 130012China the College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Complex Systems Intelligent Control and Decision Beijing Institute of TechnologyBeijing 100081China

This paper develops a quadratic function convex approximation approach to deal with the negative definite problem of the quadratic function induced by stability analysis of linear systems with time-varying *** introducing two adjustable parameters and two free variables,a novel convex function greater than or equal to the quadratic function is constructed,regardless of the sign of the coefficient in the quadratic *** developed lemma can also be degenerated into the existing quadratic function negative-determination(QFND)lemma and relaxed QFND lemma respectively,by setting two adjustable parameters and two free variables as some particular ***,for a linear system with time-varying delays,a relaxed stability criterion is established via our developed lemma,together with the quivalent reciprocal combination technique and the Bessel-Legendre *** a result,the conservatism can be reduced via the proposed approach in the context of constructing Lyapunov-Krasovskii functionals for the stability analysis of linear time-varying delay ***,the superiority of our results is illustrated through three numerical examples.

关键词： Equivalent reciprocal combination technique quadratic function convex approximation approach stability timevarying delay

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Thickness Measurement of Single-Mode Fiber Coating Layer Based on Forward Brillouin Scattering

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IEEE Sensors Journal 2025年第11期25卷 19332-19340页

作者： Zhang, Yongqi Wang, Tao Liu, Yijia Liu, Li Zhang, Mingjiang Taiyuan University of Technology Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education College of Physics and Optoelectronic Engineering Taiyuan030024 China Taiyuan University of Technology Shanxi Key Laboratory of Precision Measurement Physics College of Physics and Optoelectronic Engineering Taiyuan030024 China

The coating layer is essential for protecting and applying optical fibers. Nowadays, the thickness measurement of the coating layer relies on point measurement schemes such as the side-looking light distribution method and mechanical method. However, there are some problems with the above methods, such as the trade-off between resolution and field of view, the cutting of the measurement position and the long measurement time. To overcome these problems, we propose a new method based on forward Brillouin scattering, which measures the coating layer thickness of single-mode fibers. The physical properties of the transverse acoustic field involved in forward Brillouin scattering make it possible to measure the thickness of the fiber coating. The corresponding relationship between the transverse acoustic mode frequency and the diameter of the coating layer can be calculated. The coating layer thickness can be measured with high precision by measuring the frequency spectrum of forward Brillouin scattering corresponding to multiple transverse acoustic modes at a given temperature. In the verification experiment, three types of single-mode fibers coated with polyimide are used as the sensing fiber to measure the thickness of the coating layer at multiple temperatures. The experimental results show that the error in the coating layer thickness obtained is less than 0.05 μm. To the best of our knowledge, this is the first demonstration of non-destructive, high-precision monitoring of fiber coating thickness. © 2001-2012 IEEE.

关键词： Acoustic field measurement

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Adaptive dynamic surface control for quadrotor-slung load transportation system with uncertainties

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Science China(Technological Sciences) 2023年第10期66卷 2917-2929页

作者： DING Feng HUANG Jian SUN Chong AI Yong XU WenXia YANG ChenGuang School of Computer Science South-Central Minzu UniversityWuhan 430074China Key Laboratory of Ministryof EducationforImage Processing and Intelligent ControlHubei Key Laboratoryof Brain-inspired Intelligent Systems School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China School of Computer Science and Engineering Wuhan Institute of TechnologyWuhan 430205China Key Laboratory of Ministry of Education for Autonomous Systems and Networked Control Guangdong Engineering Technology Research Center of Control of Intelligent SystemsCollege of Automation Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

Quadrotors play a significant role in our lives and are transforming our *** cable-suspended loads is an unavoidable quadrotor application trend and a hot research topic in the control ***,the load swing and unpredictability pose significant challenges to the quadrotor's *** this paper,an anti-swing controller with an inner-outer control strategy for the quadrotor-slung load transportation system is *** facilitate the controller design,the outer position dynamics are restructured in the form of ***,a virtual controller is created to force the underactuated states to the dynamic surface to ensure the position subsystem's *** improve robustness,an adaptive law is used to eliminate the effects of uncertain cable ***,a dynamic surface controller for the inner attitude subsystem is presented to drive the actual force to the virtual *** is demonstrated that the control strategy can stabilize the quadrotor despite mass and cable length *** results are provided to demonstrate the efficacy and durability of the proposed method.

关键词： quadrotor-slung load transportation system dynamic surface control adaptive law cascade system model uncertainties

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Short-Term Passenger Flow Prediction for Urban Rail Based on Improved EEMD-Ensemble Learning 6th

Short-Term Passenger Flow Prediction for Urban Rail Based on...

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6th International Conference on Electrical Engineering and Information Technologies for Rail Transportation, EITRT 2023

作者： Qiao, Yaoqin Zhou, Huijuan Zhang, Xiayu Liu, Lufei Beijing Key Laboratory of Intelligent Control Technology for Urban Road Traffic North China University of Technology Beijing China

ISBN: (纸本)9789819993109

Urban rail transit passenger flow prediction encounters two primary challenges: the inability to effectively capture the variations in passenger flow patterns and the limited accuracy of prediction models. Therefore, this paper proposes three improved Ensemble Empirical Mode Decomposition (EEMD) methods to accurately capture the characteristics of passenger flow sequence data: (1) Grouped Reconstruction of IMF (Intrinsic Mode Function) Components in EEMD;(2) High-Frequency Disturbance Removal EEMD;(3) Hybrid EEMD. Simultaneously, a short-term passenger flow combination prediction model for urban rail transit stations is established. In order to enhance the prediction accuracy and robustness of the model, the base models utilized include XGBoost, LightGBM, and LSTM. Additionally, the Stacking ensemble method is employed to fuse the models together. Finally, a short-term passenger flow prediction model for urban rail transit based on improved EEMD and ensemble learning is constructed. Taking the entry passenger flow of Beijing West Station in the Beijing Subway as an example, the effectiveness of the model in predicting short-term passenger flow in urban rail transit is validated. © Beijing Paike Culture Commu. Co., Ltd. 2024.

关键词： Empirical mode decomposition

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