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5th International Conference on Distance Education and Learning, ICDEL 2020

作者： Zhao, Yalu Hao, Shuying Yang, Lu Xia, Guofeng Hu, Wenhua Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Tianjin China Chongqing Engineering Research Center for Advanced Intelligent Manufacturing Technology Chongqing China

ISBN: (纸本)9781450377546

In the engineering education accreditation system, it is clearly required that the major applying for certification should prove the achievement of graduation requirements with appraisal. The common appraisal methods of graduation requirements achievements (GRAs) focus on the whole situation of graduates, which lacks personalized guidance for students at school. Based on the analytical method of exam scores in the common methods, the paper presents the achievement of individual graduation requirements and designs algorithms to dynamically appraise every student with real examples, which may provide detailed data and immediate guidance for the major and its own students. The dynamic appraisal method can improve the GRAs of the major, and also can strengthen the core concepts of engineering education accreditation. © 2020 ACM.

关键词： Students

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Hybrid Vision/Force control for Interaction with the Bottle-like Object

Hybrid Vision/Force Control for Interaction with the Bottle-...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Lijun Han Hesheng Wang Weidong Chen Jingchuan Wang Jianjun Yuan Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Engineering Research Center of Intelligent Control and Management Shanghai Jiao Tong University Shanghai China Shanghai Robotics Institute School of Mechatronic Engineering and Automation Shanghai University Shanghai China

This study proposes a hybrid vision/force control scheme for interaction with the inner surface of the bottle-like object. Based on the geometry of the object, a new generalized constraint called the bottleneck (BN) constraint is proposed, which ensures the tool passes through a fixed 3-D region and avoid collisions with the boundary of the region. To realize the hybrid vision/force control under the BN constraint, a novel dynamic controller is designed inspired by the hierarchical operational space, which can complete the different tasks defined in the decoupled subspace. To enhance the robustness of the algorithm, we develop a data-driven method and an adaptive method to estimate the Jacobian matrix online in force space and image space, respectively. The asymptotic stability of the closed-loop system is rigorously proved by the Lyapunov theory. Experiments are conducted to validate the performance of the proposed method.

关键词： Jacobian matrices Geometry Heuristic algorithms Robot vision systems Force Aerospace electronics Tools

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Scheduling optimization of silicon single crystal production process based on adaptive improved particle swarm optimization

Scheduling optimization of silicon single crystal production...

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Chinese Automation Congress (CAC)

作者： Lu Kang Ding Liu Yali Wu Guozheng Ping School of Automation and Information Engineering Xi’an University of Technology National and Local Joint Engineering Research Center of Crystal Growth Equipment and System Integration Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi’an China School of Automation and Information Engineering Xi’an University of Technology National and Local Joint Engineering Research Center of Crystal Growth Xi’an University of Technology Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi’an China School of Automation and Information Engineering Xi’an University of Technology Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi’an China

ISBN: (纸本)9781665426480

Aiming at the potential safety hazards of silicon single crystal production enterprises in the process of multi-furnace silicon single crystal production, and considering the maximum power load requirements in actual enterprises, a silicon single crystal production process scheduling model with the goal of minimizing the maximum completion time was established. Based on this model, an adaptive improved particle swarm optimization algorithm (Adaptive GPSO) is proposed to solve it. The algorithm retains the individual optimal value and global optimal value of the particle swarm algorithm, and introduces the crossover operation and mutation operation in the genetic algorithm to improve the new individual generation mechanism. At the same time, it performs dynamic iterative calculations on the mutation probability and crossover probability to avoid the algorithm fall into the local optimum, and improve the diversity and convergence of the algorithm. By solving different scales scheduling problems of silicon single crystal production process, the experiments on real-world data shows that the feasibility and effectiveness of the proposed algorithm.

关键词： Adaptation models Heuristic algorithms Crystals Production Probability Silicon Scheduling

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Asynchronous Algorithm for Distributed Multi-agent Convex Optimization

Asynchronous Algorithm for Distributed Multi-agent Convex Op...

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第三十九届中国控制会议

作者： Duqiao Zhao Ding Liu Xia Zhang National & Local Joint Engineering Research Center of Crystal Growth Equipment and System Integration Xi'an University of Technology Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing

This paper proposes an asynchronous algorithm for distributed optimization problem(Asy-DOP) in multi-agent network with gradient *** algorithm can be implemented in an asynchronous distributed *** objective function of the algorithm is the sum of the local functions of multiple nodes in the network,each node only knows its own local objective function and can exchange information with its *** addition,the algorithm is based on the undirected connected graph and requires the objective function is Lipschitz *** step-size of the proposed algorithm is homogeneous and when the step-size is in a suitable range,it is proved that the convergence rate of the proposed algorithm is O(1/(?)),where the k is the number of iterations.

关键词： asynchronous algorithm distributed optimization multi-agent gradient method

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Model-Free Sliding Mode Iterative Learning control for Cz Silicon Single Crystal Diameter

Model-Free Sliding Mode Iterative Learning Control for Cz Si...

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第三十九届中国控制会议

作者： Yin Wan Ding Liu Junchao Ren Congcong Liu Jie Sun National & Local Engineering Research Center of Crystal Growth Equipment and System Integration Xi'an University of Technology Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of Technology

Aiming at the complex nonlinear dynamic time-varying characteristics for Czochralski（Cz） silicon single crystal growth process and the difficulty in modeling and controlling the crystal diameter by conventional mechanisms, based on the idea of data-driven modeling and control, this paper proposes an improved model-free sliding mode iterative learning control（MFA-SMILC） method. First, a data-driven model of crystal diameter is established using an extreme learning machine（ELM）with actual process data;Then, based on the compact-format dynamic linear（CFDL） data model, a discrete sliding mode control algorithm is used to design a data-driven controller structure for crystal diameters, and the stability of the iterative tracking error is verified by the stability analysis;Finally, the proposed MFA-SMILC controller is applied to silicon single crystal diameter control, and compared with the conventional model-free adaptive iterative learning control（MFA-ILC）, it is found that MFASMILC has faster response speed and convergence speed, which verifies the effectiveness of the proposed control method.

关键词： Cz silicon single crystal growth Crystal diameter Model free iterative learning control Sliding mode control

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Pool boiling enhancement in electrodeposited copper capillary wicks: Staggered pore configuration versus straight through-hole design

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International Communications in Heat and Mass Transfer 2025年 166卷

作者： Mou Xu Shuang-Fei Li Jia-Li Luo Yi-Ying Bao Dong-Chuan Mo Shu-Shen Lyu School of Materials Sun Yat-sen University Shenzhen 518107 China Guangdong Engineering Technology Research Centre for Advanced Thermal Control Material and System Integration (ATCMSI) Guangzhou 510275 China Center of Space Sun Yat-sen University Zhuhai 519082 China Aerospace System Engineering Shanghai Shanghai 201109 China School of Flexible Electronics Sun Yat-sen University Shenzhen 518107 China

Electrodeposition enables the fabrication of micro-nano hybrid porous materials, significantly enhancing boiling heat transfer (BHT) performance. This study produced two distinct copper capillary wicks by controlling copper ion concentration in the electrolyte: a multi-layer porous wick (Sample#M) with staggered pores in the hundreds of micrometers, and a single-layer wick (Sample#S) featuring straight through-holes of similar size. Both structures exhibit porous walls composed of submicron to micron-sized dendrites. Boiling heat transfer experiments reveal that Sample#S achieves an h MNB of 29.4 W/(cm 2 ·K) at 300 W/cm 2 , 1.4 times that of Sample#M and 5.25 times that of smooth copper (Sample#O). Sample#S also demonstrates a CHF of 310 W/cm 2 , 121 % and 270 % higher than Sample#M and Sample#O, respectively. Capillary tests and bubble dynamics analysis indicate that Sample#S's superior performance stems from its non-interleaved liquid transport channels, enabling faster liquid replenishment, and its through-hole design, which reduces bubble departure resistance, resulting in higher departure frequency and radius for enhanced heat transfer.

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Room Impulse Response Reshaping-Based Blind Source Separation for an Underdetermined Reverberant Environment

SSRN

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SSRN 2024年

作者： Xie, Yuan Zou, Tao Yang, Junjie Sun, Weijun Xie, Shengli School of Mechanical and Electrical Engineering Guangzhou University Guangdong-Hong Kong-Macao Key Laboratory of Multi-scale Information Fusion and Collaborative Optimization Control of Complex Manufacturing Process Guangzhou510006 China School of Automation Guangdong University of Technology Joint International Research Laboratory of Intelligent Information Processing and System Integration of IoT Ministry of Education of the P.R.C. Guangzhou510006 China School of Automation Guangdong University of Technology Guangdong Key Laboratory of IoT Information Processing Guangdong-HongKong-Macao Joint Laboratory for Smart Discrete Manufacturing Guangzhou510006 China School of Automation Guangdong University of Technology Key Laboratory of Intelligent Detection and the IoT in Manufacturing Ministry of Education 111 Center for Intelligent Batch Manufacturing Based on IoT Technology Guangzhou510006 China

Blind source separation under an underdetermined reverberation environment is a very challenging issue. The classical method is based on the expectation maximization algorithm. However, it is limited to high reverberation environments, resulting in bad or even invalid separation performance. To eliminate this restriction, a room impulse response reshaping-based expectation maximization method is designed to solve the problem of blind signal separation in an underdetermined reverberant environment. Firstly, a room impulse response reshaping technology is designed to eliminate the influence of audible echo on the reverberant environment, improving the quality of the received signals. Then, a new mathematical model of time-frequency mixing signals is established to reduce the approximation error of model transformation caused by high reverberation. Furthermore, an improved expectation maximization method is proposed for real-time update learning rules of model parameters, and then the sources are separated using the estimators provided by the improved expectation maximization method. Experimental results based on source separation of speech and music mixtures demonstrate that the proposed algorithm achieves better separation performance while maintaining much better robustness than popular expectation maximization methods. © 2024, The Authors. All rights reserved.

关键词： Reverberation

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The benefit of Simulation Test Application on the Development of Autonomous Driving system

The benefit of Simulation Test Application on the Developmen...

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International Automatic control Conference

作者： Chien-Hung Yu Yi-Zhao Chen I-Chun Kuo Mechatronics and System Integration Technology Group Automotive Research and Testing Center (ARTC) Changhua County Taiwan(R.O.C) Electronic Control Technology Gourp Automotive Research and Testing Center (ARTC) Changhua County Taiwan(R.O.C)

ISBN: (数字)9781728171982

ISBN: (纸本)9781728171999

Advanced Driving Assistance system (ADAS) & Autonomous Driving system (ADS) are promptly developed as the demands on intelligent & secure transportation rise. For the mentioned system to get complex, the way to verify the function and evaluate the performance of it requires rigorous and comprehensive arrangement on test scenario settings. Meanwhile, the cost to build up the mentioned tests and the risks that the test personnel take may reach a new level if applying real car tests. To deal with these mentioned issues, the X-in-the-Loop(XiL) simulation test is adopted. In this paper, the benefit to apply simulation tests for ADS development will be introduced through the discussion about driving simulator appliance and test scenario construction. An ADS equipped with path following system and Automated Emergency Braking (AEB) system is set as a sample to be tested in the settled XiL to determine its efficacy of driving safety. According to the results, the requirements of ADS Development are met quite well - The system functionality is determined through each proposed tests. The cost of test equipment and hazards during the tests can thus be reduced.

关键词： Analytical models Transportation Hazards Personnel Automobiles Test equipment Autonomous vehicles

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Atf-Bss: Adaptive Time-Frequency Blind Source Separation for High Reverberation and Echo Environments

SSRN

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SSRN 2023年

作者： Xie, Yuan Zou, Tao Chen, Ci Sun, Weijun Xie, Shengli School of Mechanical and Electrical Engineering Guangzhou University Guangdong-Hong Kong-Macao Key Laboratory of Multi-scale Information Fusion and Collaborative Optimization Control of Complex Manufacturing Process Guangzhou510006 China School of Automation Guangdong University of Technology Joint International Research Laboratory of Intelligent Information Processing and System Integration of IoT Ministry of Education of the P.R.C. Guangzhou510006 China School of Automation Guangdong University of Technology Guangdong Key Laboratory of IoT Information Processing Guangdong-HongKong-Macao Joint Laboratory for Smart Discrete Manufacturing Guangzhou510006 China School of Automation Guangdong University of Technology Key Laboratory of Intelligent Detection and the IoT in Manufacturing Ministry of Education 111 Center for Intelligent Batch Manufacturing Based on IoT Technology Guangzhou510006 China

Blind source separation with high reverberation and echoes is an open and extremely challenging issue. Room reverberation and echoes have an important influence on acoustics quality, causing great difficulty in independent source separation. In the paper, an adaptive time-frequency blind source separation algorithm (ATF-BSS) is designed to deal with high reverberation and echoes, which can adaptively attenuate audible echoes and enhance the harmonic structure of real-world audio signals, achieving excellent separation performance. Firstly, an equalizer network is designed for the room impulse response to weakening audible echoes under high reverberation and echo environments without changing the perceived timbre. Furthermore, an adaptive time-frequency Wiener-like masking is presented to enhance the dominant signal and attenuate the other components that have less energy than the dominant signal. To the best of our knowledge, this is the first attempt to incorporate the advantages of an equalizer network for removing or weakening audible echoes and adaptive time-frequency masking to solve blind separation with high reverberation and echoes. Experimental results on public audio datasets demonstrate that the proposed ATF-BSS algorithm improves signal intelligibility and achieves much better separation performance than state-of-the-art methods. © 2023, The Authors. All rights reserved.

关键词： Reverberation

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Atf-Bss: Adaptive Time-Frequency Blind Source Separation for High Reverberation and Echo Environments

SSRN

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SSRN 2023年

Blind source separation with high reverberation and echoes is an open and extremely challenging issue. Because the room reverberation and echoes have an important influence on acoustics quality, bringing great difficulty to the independent source separation. In the paper, an adaptive time-frequency blind source separation (ATF-BSS) algorithm is designed to deal with the high reverberation and echoes, which can adaptively attenuate the audible echoes and enhance the harmonic structure of the real-world audio signals, achieving excellent separation performance. Firstly, an equalizer network is designed for the room impulse response to weakening audible echoes under the high reverberation and echo environments without changing the perceived timbre. Furthermore, an adaptive time-frequency Wiener-like masking is presented to enhance the dominant signal and attenuate the other components having less energy than the dominant signal. To the best of our knowledge, this is the first attempt to incorporate the advantages of an equalizer network for removing or weakening audible echoes and adaptive time-frequency masking to solve blind separation with high reverberation and echoes. Experimental results on the public audio datasets demonstrate that the proposed ATF-BSS algorithm improves signal intelligibility and achieves much better separation performance than the state-of-the-art methods. © 2023, The Authors. All rights reserved.

关键词： Reverberation

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