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19th Annual Conference of China Electrotechnical Society, ACCES 2024

作者： Zhang, Kunpeng Tang, Junjie Yang, Hui School of Electrical and Automation Engineering East China Jiaotong University Nanchang330013 China Jiangxi Provincial Key Laboratory of Advanced Control and Optimization Nanchang330013 China State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure Jiangxi Nanchang330013 China

ISBN: (纸本)9789819613823

Aiming at the problems of difficult control of electric traction equipment for heavy haul trains and low accuracy of control models, a distributed fuzzy sliding mode optimization control strategy for heavy haul trains based on a predictive compensation model is proposed. Firstly, based on the complex road condition information of heavy haul railways, a longitudinal dynamics model of heavy haul trains is established. Then, a long short-term memory neural network (LSTM) optimized by the Northern Goshawk optimization (NGO) algorithm is used to predict and compensate the uncertain terms in the model. At the same time, a variable universe fuzzy algorithm (VUF) is used to improve the fast terminal sliding mode controller (FTSM). Finally, the improved controller is combined with the air braking strategy to jointly control the corrected model. The simulation results based on the heavy haul train operation simulation platform and real operation data show that the proposed method can effectively improve the handling stability and safety of 10,000-ton heavy haul trains. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Traction control

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Study on the mechanism by which anaerobic organisms remove nitrogen and sulfur from low-C/N rare earth tail water simultaneously

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Environmental Science and Pollution Research 2025年第20期32卷 12277-12284页

作者： Zhou, Gengxin Xiong, Zhensheng Luo, Qingchun Yang, Liming Geng, Yanni Liu, Zhuochao Hu, Yi Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse Nanchang330063 China School of Environment and Energy Peking University Shenzhen Graduate School Guangdong Shenzhen518055 China National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Beijing University of Technology Beijing100124 China ECO-ADVANCE CO LED Ganzhou Jiangxi341000 China

The low-C/N limits the simultaneous removal of the high sulfate and high ammonia nitrogen content in the rare earth tail water. How bacteria cycle sulfur and nitrogen in this environment is still unknown. As a result, there is a pressing need to treat such complicated tail water. This study built an anaerobic reactor to treat the rare earth tail water and employed anaerobic microorganisms. Following 104 days of operation, the rates of nitrogen removal for nitrate and nitrite are above 90%, and the removal rates of ammonia nitrogen and sulfate could reach 14.36 mg/(L·day) and 21.31 mg/(L·day), respectively. To identify the nitrogen and sulfur cycle in the reactor, the bacterial population and gene abundance were characterized using 16S rRNA sequencing and functional gene prediction. The results demonstrated that nitrogen from ammonia was primarily eliminated via assimilation, while nitrogen from nitrate was primarily eliminated by denitrification, which was strongly associated with Comamonas. The principal mechanism for eliminating the sulfate is assimilation, which is linked to the bacterium SBR1031. In conclusion, the nitrogen and sulfur cycle theoretically supports the simultaneous removal of sulfate and ammonia nitrogen from rare earth tail water under low-C/N circumstances. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Anaerobic bacteria Low-C/N Nitrogen-sulfur cycle Rare earth tail water

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Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

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Nano-Micro Letters 2025年第1期17卷 439-455页

作者： Zhaobo Feng Chongbo Liu Xin Li Guangsheng Luo Naixin Zhai Ruizhe Hu Jing Lin Jinbin Peng Yuhui Peng Renchao Che Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle School of Environmental and Chemical EngineeringNanchang Hangkong UniversityNanchang 330063People’s Republic of China School of Physics and Materials Nanchang UniversityNanchang 330031People’s Republic of China Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering and TechnologyFudan UniversityShanghai 200438People’s Republic of China

Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic structure and physicochemical property of electromagnetic wave absorption(EMWA)***,the relationship between configuration and electromagnetic(EM)loss mechanism has remained ***,drawing inspiration from the DNA transcription process,we report the successful synthesis of novel in situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA *** calculation and EM simulation confirm that the orbital coupling and spin polarization of the Mn–N4–C configuration,along with cross polarization generated by the helical structure,endow the helical converters with enhanced EM *** a result,HMC-8 demonstrates outstanding EMWA performance,achieving a minimum reflection loss of−63.13 dB at an ultralow thickness of 1.29 *** precise tuning of the graphite domain size,HMC-7 achieves an effective absorption bandwidth(EAB)of 6.08 GHz at 2.02 mm ***,constructing macroscale gradient metamaterials enables an ultrabroadband EAB of 12.16 GHz at a thickness of only 5.00 mm,with the maximum radar cross section reduction value reaching 36.4 dB *** innovative approach not only advances the understanding of metal–nonmetal co-doping but also realizes broadband EMWA,thus contributing to the development of EMWA mechanisms and applications.

关键词： Metal-nonmetal co-doping 3d-2p orbital coupling Spin polarization Helical structure Broadband EM wave absorption

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An LCOR model for suppressing cascading failure in weighted complex networks

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Chinese Physics B 2013年第5期22卷 626-631页

作者：陈世明庞少鹏邹小群 School of Electrical and Electronic Engineering East China Jiaotong University Key Laboratory of Advanced Control & Optimization of Jiangxi Province

Based on the relationship between capacity and load, cascading failure on weighted complex networks is investigated, and a load-capacity optimal relationship （LCOR） model is proposed in this paper. Compared with three other kinds of load- capacity linear or non-linear relationship models in model networks as well as a number of real-world weighted networks including the railway network, the airports network and the metro network, the LCOR model is shown to have the best robustness against cascading failure with less cost. Furthermore, theoretical analysis and computational method of its cost threshold are provided to validate the effectiveness of the LCOR model. The results show that the LCOR model is effective for designing real-world networks with high robustness and less cost against cascading failure.

关键词： cascading failure load-capacity optimal relationship model robustness cost

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Prediction of component content in rare earth extraction process based on ESNs-Adaboost

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IFAC-PapersOnLine 2018年第21期51卷 42-47页

作者： Hui, Yang Shuli, Liu Rongxiu, Lu Jianyong, Zhu College of electrical and automation engineering East China Jiaotong University Nanchang China Key Laboratory for advanced control and optimization of Jiangxi Province Nanchang China

Aiming at the problem that the component content of elements in REEP (rare earth extraction process) is difficult to detect, a modeling method for component content in REEP based on ESNs-Adaboost is proposed. It uses ESN (echo state network) with fast training speed and high stability to establish multiple identification model of REEP. And then combined with the improved Adaboost algorithm, multiple models are integrated into a final ESNs-Adaboost model of component content of REEP according to the combination rule. The improved Adaboost algorithm has an advantage that its threshold can be adjusted adaptively with the training error. By collecting data from CePr/Nd extraction process, the simulation results show that the proposed method has high prediction accuracy, strong generalization ability, good robustness and better performance than single ESN model, which can meet the requirements of rapid detection of component content in extraction field. © 2018

关键词： Adaptive boosting Extraction Forecasting Rare earths Echo state networks Extraction process Generalization ability Model prediction Multiple identifications Prediction accuracy Rare earth extraction Rare earth extraction process

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Consecutive Asymmetric Transfer Hydrogenation of C2-Acylated Quinolines and Quinoxalines: A Diastereodivergent Synthesis of Enantioenriched Tetrahydroquinolines and Tetrahydroquinoxalines Bearing Endo- and Exocyclic Chirality

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Journal of the American Chemical Society 2025年 2025 May 15页

作者： Zhang, Mangang Niu, Tianyu Liang, Mingrong Xu, Feng Du, Yongyi Zhuang, Haokun Song, Ren-Jie Yang, Hua Yin, Qin College of Chemistry and Chemical Engineering Central South University Changsha 410083 China Faculty of Pharmaceutical Sciences Shenzhen University of Advanced Technology Shenzhen 518107 China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

Consecutive asymmetric hydrogenation offers a direct and convenient approach to synthesizing complex C(sp3)-enriched products with multiple chirality. Herein, we report an asymmetric synthesis of chiral 1,2,3,4-tetrah... 详细信息

Consecutive asymmetric hydrogenation offers a direct and convenient approach to synthesizing complex C(sp³)-enriched products with multiple chirality. Herein, we report an asymmetric synthesis of chiral 1,2,3,4-tetrahydroquinolines (THQs) and tetrahydroquinoxalines bearing both endo- and exocyclic vicinal chirality through the consecutive transfer hydrogenation of easily accessible C2-acylated quinolines and quinoxalines. The method features mild conditions, easy operation, broad substrate scope (42 examples), and excellent asymmetric control (generally >90% ee and 20/1 dr). The key to success is the use of a water-soluble chiral aminobenzimidazole Ir catalyst. Mechanistic experiments support that the reaction involves the sequential reduction of the carbonyl group and then the quinoline core, with the asymmetric control of each step dominated by the catalyst. Remarkably, a diastereodivergent synthesis of all four stereoisomers of a chiral THQ has been successfully implemented. © 2025 American Chemical Society.

关键词： Stereocenters

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High-speed train positioning based on a combination of Beidou navigation, inertial navigation and an electronic map

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Science China(Information Sciences) 2023年第7期66卷 237-252页

作者： Hui YANG Shuai-Qiang DONG Chun-Hua XIE School of Electrical and Automation Engineering East China Jiaotong University Key Laboratory of Advanced Control & Optimization of Jiangxi Province East China Jiaotong University State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure East China Jiaotong University

To date, the studies on the combination positioning of high-speed trains have made great progress, but the positioning accuracy of these methods is relatively low. Map-matching positioning can improve positioning accuracy, but information transmission is time-consuming. Few studies incorporate it into combination positioning. To solve the problem, this paper proposes a high-speed train positioning method based on combining a Beidou navigation system, an inertial navigation system, and an electronic map. First, the combination positioning problem is transformed into a multi-objective optimization problem, which weights the direction similarity and distance error to form a fitness function and converts the railway line and the maximum error range of each positioning system into constraints. Second, an improved differential evolution algorithm is proposed to solve this problem. By referencing the gray wolf algorithm,the differential evolution algorithm updates individuals by varying toward the direction of multiple optimal values. Then, a new combination positioning algorithm for high-speed trains is proposed. In the simulation,the increase in positioning speed and accuracy is analyzed and validated. Compared to the current algorithms, the proposed algorithm performs better. The proposed method has practical value for improving the reliability and safety of train operations.

关键词： electronic map multi-objective optimization differential evolution algorithm Beidou navigation system high-speed train positioning

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Color Constancy of Rare-Earth Solution Image with Adaptive Parameter

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IFAC-PapersOnLine 2018年第21期51卷 295-300页

作者： Yang, Hui Zhang, Xuqian Liu, Zhixin Lu, Rongxiu Tan, Chang Zhu, Jianyong College of Electrical and Automation Engineering East China Jiaotong University Nanchang Jiangxi330013 China Key Laboratory of Advanced Control and Optimization of Jiangxi Province NanchangJiangxi330013 China Jiangxi Golden Century Advanced Materials Co. Ltd NanchangJiangxi330013 China

It is known that the color of the rare earth solution image varies with the illumination condition due to the rugged environment of rare earth extraction industry and attenuation of lights, which makes soft-sensing model for rare earth element content based on the color characteristics of the rare earth solution have larger error. An unsupervised color correction algorithm with adaptive optimization of parameters for rare earth solution is proposed in this paper. Such an algorithm can realize proper color correction of rare earth solution by using Genetic Algorithm (GA) based Grey Edge algorithm. The GA based Grey Edge algorithm can handle the issue of parameter adaptive optimization caused by the rare earth solution change with the different illumination and extraction tank, and reduce the error between the designated area of the image and the designated area of the standard image. The simulation shows the effectiveness of the proposed algorithm. © 2018

关键词： Edge detection Color Color computer graphics Extraction Gallium Genetic algorithms Image processing Parameter estimation Rare earths adaptive Adaptive optimization Color characteristics Color constancy Grey Edge Illumination conditions Rare earth extraction Rugged environments

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Asymptotic state estimation for linear systems with sensor and actuator faults

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Science China(Information Sciences) 2019年第11期62卷 106-120页

作者： Chun-Hua XIE Hui YANG Dianhui WANG Zhe LI School of Electrical and Automation Engineering East China Jiaotong University Key Laboratory of Advanced Control & Optimization of Jiangxi Province Department of Computer Science and Information Technology La Trobe University College of Electrical and Information Engineering Hunan University

This paper investigates the asymptotic state estimation problem for linear systems with sensor and actuator faults, where the faults are modeled via multiple modes. For the case of sensor faults, we first introduce a new notion of detectability, i.e., detectability of system against sensor faults. The notion helps to address the question of whether it is possible to asymptotically estimate the system state by using the control input and system output, irrespective of which mode the system is in and what values the fault signals are.A necessary and sufficient condition for the system to be detectable against sensor faults is given, and then two switched observers are proposed for asymptotic state estimation with the help of maximin strategy. For the system with ? fault modes, we provide the explicit form of the switched observer, which is based on a bank of ?(?+1)/2 Luenberger-like or sliding-mode observers. Furthermore, extensions to the case of sensor and actuator faults are further studied. Finally, a simulation example of a reduced-order aircraft system is provided to show the effectiveness of the proposed approaches.

关键词： asymptotic state estimation observer linear systems sensor faults actuator faults

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Component content distribution profile control in rare earth countercurrent extraction process

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Chinese Journal of Chemical Engineering 2015年第1期23卷 192-198页

作者：杨辉徐芳萍陆荣秀丁永权 School of Electrical and Electronic Engineering East China Jiaotong University Key Laboratory of Advanced Control & Optimization of Jiangxi Province

Considering that the on-line measurement and automatic control of element component content(ECC) are difficult to perform in rare earth cascade extraction process, the ECC distribution profile is dynamically regulated at all stages to assess the effect of product purity control. Focusing on the theory of countercurrent extraction, the technology parameters and pre-setting flow-rates during the extract process are designed. Under varying process parameters, a novel step by step model is also proposed for each stage to analyze the impact on the distribution profile change. Combining the mass balance model and ECC changing trend at the monitoring stage, the ECC distribution profile can be automatically regulated by dynamically compensating the related extract or scrubbing liquid flow-rate. To this end, the required product purity at the two outlets is achieved. Based on Wincc and Matlab dynamic simulators, a specific Pr/Nd cascade extraction process is used to illustrate and demonstrate the application of the present approach.

关键词： Rare earth cascade extraction Balance model Distribution regulation Pr/Nd

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