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学者姓名:郑松
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As an effective carrier of a new energy collection, the DC power grid has low inertia and weak damping characteristics, making it essential to limit fault current and isolate the DC system. To quickly and effectively suppress fault current, a flexible current-limiting device (FCLD) is proposed, which can realize transient fault self-recovery without circuit breaker action and permanent and quick isolation of a fault. It improves the operational ability of the DC system under an asymmetric condition. First, a rectifier provides a set-slope current to each cascade inductor, so the voltage of the inductor can be clamped. Second, a controlled current source (CCS) is applied to generate inverse flux to prevent the inductor from magnetic saturation. The protection action time of the DC circuit breaker is reformulated. Finally, by considering the synergistic action of the current-limiting device, the circuit breaker, and the transient characteristics of the DC grid fault, the protection scheme of the multi-terminal flexible DC system can be formulated. To verify the validity of the proposed flexible current-limiting device, a multi-terminal flexible DC simulation platform is established, and the faults of DC lines are simulated and analyzed.
Keyword :
cascade inductor cascade inductor controlled current source controlled current source flexible current limiting flexible current limiting multi-terminal flexible DC system multi-terminal flexible DC system
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GB/T 7714 | Zheng, Feng , Peng, Yaling , Wang, Weidong et al. Research on the Fault-Transient Characteristics of a DC Power System Considering the Cooperative Action of a Flexible Current-Limiting Device and a Circuit Breaker [J]. | SYMMETRY-BASEL , 2023 , 15 (1) . |
MLA | Zheng, Feng et al. "Research on the Fault-Transient Characteristics of a DC Power System Considering the Cooperative Action of a Flexible Current-Limiting Device and a Circuit Breaker" . | SYMMETRY-BASEL 15 . 1 (2023) . |
APA | Zheng, Feng , Peng, Yaling , Wang, Weidong , Zheng, Song . Research on the Fault-Transient Characteristics of a DC Power System Considering the Cooperative Action of a Flexible Current-Limiting Device and a Circuit Breaker . | SYMMETRY-BASEL , 2023 , 15 (1) . |
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Under weak-grid condition, the mismatch degree between grid impedance and inverter output impedance can increase, which will lead to inverter instability. Compared with conventional power grid, the parallel resonance of multi-inverter parallel system is more likely to happen. In order to improve inverter stability and suppress multiple-inverter parallel resonance under weak-grid condition, a new generalized control mode for control layer is proposed in this paper, which is based on finite set model predictive control (FCS-MPC) and inverse dynamic model control (IDM). The FCS-MPC with delay compensation is introduced into the current inner loop of the control layer, and the IDM control is introduced into the voltage outer loop, so as to make the transfer functions of current inner loop and voltage outer loop unitized and further reduce the order of the inverter's control system. Order reduction can improve the phase margin of the inverter output impedance, in other words, enhance inverter dynamic performance. Finally, the simulation model of multi-inverter parallel system is built, and by comparing with the traditional control strategies, the effectiveness of the proposed control strategy is verified.
Keyword :
Finite set model prediction Finite set model prediction Inverse model feedforward Inverse model feedforward Multi -inverter parallel system Multi -inverter parallel system Weak grid Weak grid
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GB/T 7714 | Zheng, Feng , Wu, Guojing , Lin, Xiangqun et al. Research on control strategy for improving stability of multi-inverter parallel system under weak grid condition [J]. | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2023 , 153 . |
MLA | Zheng, Feng et al. "Research on control strategy for improving stability of multi-inverter parallel system under weak grid condition" . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 153 (2023) . |
APA | Zheng, Feng , Wu, Guojing , Lin, Xiangqun , Zheng, Song , Wu, Xudong , Lin, Yanzhen et al. Research on control strategy for improving stability of multi-inverter parallel system under weak grid condition . | INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS , 2023 , 153 . |
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针对智能制造领域中多智能体系统(multi-agent systems,MASs)机理建模存在复杂性、异构性等实际问题,结合工业互联网和云控制,提出了面向多智能体系统的"云网边端"一体化架构设计方法,解决了异构系统通信协议解析问题和云网边端计算环境一致性问题,打通了异构智能体之间信息流,达到了降低开发成本、提高技术资源复用率的目的.将一组高度自动化装备组成的无人工厂作为研究对象,验证了所提架构的可行性.
Keyword :
MASs MASs 云控制 云控制 工业互联网 工业互联网 智能制造 智能制造
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GB/T 7714 | 岳靓 , 郑松 . 面向多智能体系统的"云网边端"一体化架构 [J]. | 指挥与控制学报 , 2023 , 9 (3) : 263-273 . |
MLA | 岳靓 et al. "面向多智能体系统的"云网边端"一体化架构" . | 指挥与控制学报 9 . 3 (2023) : 263-273 . |
APA | 岳靓 , 郑松 . 面向多智能体系统的"云网边端"一体化架构 . | 指挥与控制学报 , 2023 , 9 (3) , 263-273 . |
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针对云控制系统的分布式拒绝服务(distributed denial of service,DDoS)攻击问题,提出一种融入多头注意力(multi-head attention,MHA)机制的时空特征检测模型,分别从时间和空间维度实现对流量特征的提取,并结合多头注意力机制提高模型对关键特征的区分能力.基于爱普云平台(industrial automation platform,IAP)构建了单容水箱云控制系统,用以研究DDoS攻击对云控制系统的影响.仿真结果表明所提出的模型优于现有的DDoS攻击检测模型,可以有效地检测出云控制系统的DDoS攻击.
Keyword :
DDoS DDoS 云控制系统 云控制系统 多头注意力机制 多头注意力机制 攻击检测 攻击检测
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GB/T 7714 | 许盛亮 , 郑松 . 基于CNN-MHA-BiLSTM的云控制系统DDoS攻击检测 [J]. | 指挥与控制学报 , 2023 , 9 (3) : 355-360 . |
MLA | 许盛亮 et al. "基于CNN-MHA-BiLSTM的云控制系统DDoS攻击检测" . | 指挥与控制学报 9 . 3 (2023) : 355-360 . |
APA | 许盛亮 , 郑松 . 基于CNN-MHA-BiLSTM的云控制系统DDoS攻击检测 . | 指挥与控制学报 , 2023 , 9 (3) , 355-360 . |
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Reinforcement Learning (RL) has been applied to robotic arm control, which enables the agent to learn an effective policy to solve complex tasks. However, it requires constant interaction with the environment leading to low sample efficiency. In this paper, we propose a robotic arm control approach based on planning via lookahead search, which is a model-based RL algorithm to improve the sample efficiency. The approach builds an environment model in order to obtain the dynamics of the environment. Thus the model can be used to plan future actions by a tree-based search. The experiments show that our approach can solve the task of robotic arm control with less environmental samples. © 2023 IEEE.
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GB/T 7714 | Chen, Y. , Sun, X. , Zheng, S. et al. Model-Based Reinforcement Learning for Robotic Arm Control with Limited Environment Interaction [未知]. |
MLA | Chen, Y. et al. "Model-Based Reinforcement Learning for Robotic Arm Control with Limited Environment Interaction" [未知]. |
APA | Chen, Y. , Sun, X. , Zheng, S. , Huang, W. , Zeng, S. , Chen, D. et al. Model-Based Reinforcement Learning for Robotic Arm Control with Limited Environment Interaction [未知]. |
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Students behavior in the classroom has a close relation with the academic performance of students. With the widespread use of mobile phones, the students are easily distracted by mobile phones during the class. Therefore, analyzing the students behavior in the classroom becomes important to improve the quality of teaching. However, the existing methods for analyzing students behavior in the classroom, such as facial recognition, has low efficiency with large amounts of irrelevant data. And it also raises concerns about privacy and ethical issues. To solve this problem, in this paper, a novel mobile software called EasyClass has been developed to collect and quantify students behaviors. Based on the data collected by EasyClass, we propose to utilize user profiling to study students behavior in the classroom. The clustering algorithm is firstly employed to classify the data and generate semantically tags which describe students behavior in the classroom. Then a sequence and association rule analysis method is used to analyze the behavior tags and generated association rules. The results enable educators and non-expert users to gain a deeper understanding of students behavior in the classroom, and further improve the quality of the classroom teaching. © 2023 IEEE.
Keyword :
Association rules Association rules Data mining Data mining Face recognition Face recognition K-means clustering K-means clustering Students Students User profile User profile
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GB/T 7714 | Zeng, Qingbo , Xu, Zhezhuang , Zheng, Song et al. Analyzing Behavior Data of Students in the Classroom with Association Rule Mining [C] . 2023 : 7724-7729 . |
MLA | Zeng, Qingbo et al. "Analyzing Behavior Data of Students in the Classroom with Association Rule Mining" . (2023) : 7724-7729 . |
APA | Zeng, Qingbo , Xu, Zhezhuang , Zheng, Song , Liu, Chi , Chai, Qinqin , Zhang, Ying . Analyzing Behavior Data of Students in the Classroom with Association Rule Mining . (2023) : 7724-7729 . |
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Automated wood defect detection is of great significance for improving wood utilization. However, the stains on the wood surface resemble defect features and it is difficult to distinguish the appearance of wane from defect-free regions. Relying solely on machine vision for extracting surface features of wood makes it difficult to achieve accurate defect detection. To address these challenges, we propose MMDNet, a multimodal detection network that combines point cloud and image data. By adaptively fusing point cloud and image features at multiple stages, the network effectively highlights wood surface defect regions. Additionally, we introduce an Atrous Spatial Pyramid Pooling (ASPP) module into the network, which expands the network's receptive field and enables a comprehensive perception of the defects. Furthermore, we employ a deep supervision strategy to encourage the network to learn discriminative feature representations, enhancing the model's ability to differentiate defect regions. Experimental results validate the effectiveness of our method in detecting defects that are similar to the background and reducing interference from stains. © 2023 IEEE.
Keyword :
Computer vision Computer vision Surface defects Surface defects Wood Wood
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GB/T 7714 | Zhang, Hongchuan , Zheng, Song , Zhu, Yuhang et al. Surface Defect Detection of Wooden Boards Based on Multi-Modal Fusion [C] . 2023 : 8999-9003 . |
MLA | Zhang, Hongchuan et al. "Surface Defect Detection of Wooden Boards Based on Multi-Modal Fusion" . (2023) : 8999-9003 . |
APA | Zhang, Hongchuan , Zheng, Song , Zhu, Yuhang , Lin, Ye , Ai, Zhijie , Xu, Zhezhuang . Surface Defect Detection of Wooden Boards Based on Multi-Modal Fusion . (2023) : 8999-9003 . |
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The efficient management of storage has become a critical determinant of operational efficiency due to the growing and diverse demand for steel logistics parks. However, the current storage methods consistently result in significant imbalances in the loading of steel products and operating times across multiple yards. To address this challenge, we propose optimizing the distribution of steel products based on demand levels and retrieval efficiency. Firstly, we present an optimization problem that employs demand-driven storage principles to formulate the scheduling of steel product storage. Then, we introduce a novel algorithm called the Adaptive Preferred Evolutionary Heuristic (APEH) to tackle this problem. The results from our experiments indicate that this model effectively enhances the storage structure, and the proposed algorithm consistently yields optimal solutions within a reasonable timeframe. © 2023 IEEE.
Keyword :
Efficiency Efficiency Heuristic algorithms Heuristic algorithms Optimization Optimization
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GB/T 7714 | Xu, Zhibin , Zheng, Song , Wang, Jinlong et al. Enhancing Scheduling Efficiency of Steel Logistics Parks by Optimized Storage Distribution [C] . 2023 : 7718-7723 . |
MLA | Xu, Zhibin et al. "Enhancing Scheduling Efficiency of Steel Logistics Parks by Optimized Storage Distribution" . (2023) : 7718-7723 . |
APA | Xu, Zhibin , Zheng, Song , Wang, Jinlong , Xu, Zhezhuang , Chen, Boyu , Zhang, Qingdong . Enhancing Scheduling Efficiency of Steel Logistics Parks by Optimized Storage Distribution . (2023) : 7718-7723 . |
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To provide an easier solution for the simulation study of serial communication protocols, this paper explores the principle of data engine technology and the way it is applied and constructs a reusable serial protocol emulator architecture based on it. Then the Modbus-RTU communication protocol is analyzed, and the program simulation of Modbus-RTU protocol is implemented in the aforementioned architecture. Finally, the feasibility of this protocol emulator is verified by the serial port modulation tool. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Keyword :
Engines Engines Internet protocols Internet protocols Network architecture Network architecture Signal processing Signal processing
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GB/T 7714 | Chang, Donglin , Zheng, Song . Design of Serial Communication Protocol Simulator Based on Data Engine Technology [C] . 2022 : 698-706 . |
MLA | Chang, Donglin et al. "Design of Serial Communication Protocol Simulator Based on Data Engine Technology" . (2022) : 698-706 . |
APA | Chang, Donglin , Zheng, Song . Design of Serial Communication Protocol Simulator Based on Data Engine Technology . (2022) : 698-706 . |
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With the rapid transformation and upgrading of the global manufacturing industry, the industrial Internet which will support the future development of industrial digital intelligence requires the deep integration of important enabling technologies such as 5G and MEC. According to the characteristics of industrial environment, this paper designs a set of industrial production environment to simulate the process of data transmission on the MEC edge cloud industrial platform, and to measure the overall transmission delay of industrial data in control. Aiming at the problems of different data acquisition communication cycles, the proposed data delay measurement method can solve the shortcomings of the current oscilloscope direct measurement method. The experimental results show that the proposed method can measure the industrial data transmission delay more accurately, with an accuracy of milliseconds. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Keyword :
5G mobile communication systems 5G mobile communication systems Data acquisition Data acquisition Data communication systems Data communication systems Data transfer Data transfer Industrial research Industrial research Time delay Time delay Timing circuits Timing circuits
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GB/T 7714 | Lu, Zhe , Zheng, Song . Research on Delay Measurement of MEC Application in Industrial Internet [C] . 2022 : 707-715 . |
MLA | Lu, Zhe et al. "Research on Delay Measurement of MEC Application in Industrial Internet" . (2022) : 707-715 . |
APA | Lu, Zhe , Zheng, Song . Research on Delay Measurement of MEC Application in Industrial Internet . (2022) : 707-715 . |
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