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第41届中国控制会议

作者： Yajing Wang Jingwen Yi Li Chai Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and Technology College of Control Science and Engineering Zhejiang University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

As a typical state-dependent model which considers psychological factors,bounded confidence model is becoming a popular tool in opinion evolution *** this paper,a novel two-layer time-varying trust Hegselmann-Krause model(twolayer THK model) is proposed by describing the "Similarity Effect" in *** two-layer THK model consists of leaderlayer and *** in leader-layer are agents with reputation and more power to influence *** in follower-layer are agents with sensitivity,which can change their trust to others according to opinion *** analyze the convergence of the proposed model and simulate phenomena of opinion polarization in *** reveal the following facts:Reputation of leaders does not have obvious effects on opinion *** sensitivity and proper confidence radius are promotive to opinion polarization.

关键词： Hegselmann-Krause model time-varying trust opinion leader opinion polarization

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Electric Field Coupled Wireless Power Transmission Based on Three-Phase System 7

Electric Field Coupled Wireless Power Transmission Based on ...

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7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Geng, Xin Li, YouCheng Engineering Research Center Ministry of Education of Automotive Electronics Drive Control and System Integration Harbin University of Science and Technology Harbin China College of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin China

ISBN: (纸本)9798350359558

For the common capacitive coupling mechanism of single-phase quadrupole plate, an equivalent method is often used to simplify the six-capacitor into four-capacitor, which has become the most widely used capacitance equivalent model. Compared with the single-phase electric field coupled wireless power transmission system, in order to improve the output power, this paper refers to this method to design a three-phase input three-pair plate wireless power transmission system. By making every two pairs of plates take an equivalent method, the expression of the equivalent coupling capacitance value of the three pairs of plates is obtained. Then the equivalent three-phase system is simplified to a single-phase network, and the characteristics of the system with constant voltage and constant current output are derived. And the output power expression is obtained. It is proposed to control the system by controlling the system frequency to make the reactive power 0. Through the finite element simulation software Maxwell, the equivalent coupling capacitance values of the three pairs of plates are simulated and calculated. The three capacitance values are approximately equal, which verifies the feasibility of the equivalent method. After that, the proposed system is modeled and simulated. The two results verify each other, which proves the constant voltage output characteristics of the system and the characteristics of the resonant output at constant voltage, and also verifies the correctness of the formula derivation. © 2024 IEEE.

关键词： Electric fields

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ZnS-embedded porous carbon for peroxydisulfate activation:Enhanced electron transfer for bisphenol A degradation

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Environmental science and Ecotechnology 2024年第3期19卷 161-169页

作者： Ying Liu Ningjie Du Xinru Liu Ducheng Yao Deli Wu Zhuo Li Shun Mao College of Environmental Science and Engineering Biomedical Multidisciplinary Innovation Research InstituteShanghai East HospitalState Key Laboratory of Pollution Control and Resource ReuseTongji University1239 Siping RoadShanghai200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China

Transition metal sulfides have garnered increasing attention for their role in persulfate activation,a crucial process in environmental ***,the function of metal sulfides without reversible valence changes,such as ZnS,remains largely unexplored in this *** we report ZnS-embedded porous carbon(ZnS-C),synthesized through the pyrolysis of Zn-MOF-74 and dibenzyl ***-C demonstrates remarkable activity in activating peroxydisulfate(PDS)across a wide pH range,enabling the efficient mineralization removal of bisphenol A(BPA).Through electrochemical investigation and theoretical simulations of charge density distributions,we unveil that the electron transfer from BPA to PDS mediated by the ZnS-C catalyst governs the *** study,both in theory and experiment,demonstrates metal sulfide as electron pump that enhances electron transfer efficiency in PDS *** findings redefine the role of metal sulfide catalysts,shedding new light on their potential for regulating reaction pathways in PDS activation processes.

关键词： Peroxydisulfate activation Reaction pathway regulation Electron transfer ZnS Bisphenol A

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Design of an aircraft autonomous traction taxiing system based on hydraulic secondary control

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Chinese Journal of Aeronautics 2024年第6期37卷 348-359页

作者： Xiaochao LIU Zhongyi QIU Hao ZHANG Pengyuan QI Zhenyu WANG Yaoxing SHANG Zongxia JIAO Research Institute for Frontier Science Beihang UniversityBeijing 100083China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100083China Ningbo Institute of Technology Beihang UniversityNingbo 315800China Tianmushan Laboratory Xixi Octagon CityYuhang DistrictHangzhou 310023China Science and Technology on Aircraft Control Laboratory Beihang UniversityBeijing 100083China Beijing Tianma Intelligent Control Technology Co. Ltd.Beijing 101399China China Coal Research Institute Beijing 100013China

At present,aircraft taxiing at ground airports needs to be provided with a thrust by the main *** taxiing process is inefficient,has high fuel consumption and serious pollution,and is prone to safety *** this paper,a new configuration of aircraft autonomous traction taxiing system is proposed based on the principle of hydraulic secondary control,in which a hydraulic motor drive device is installed at the front wheels of the aircraft to drive the wheels to rotate forward or *** on this,autonomous taxiing can be realized without relying on the main engines,thus greatly improving airport operation ***,this paper analyzes the influencing factors of the autonomous traction taxiing process,and investigates the parameter matching design of the new configuration ***,this paper develops the ground principle prototype,designs the aircraft longitudinal bonding force observer and the aircraft wheel disturbance moment observer,and proposes the speed control method of the aircraft front wheel autonomous traction taxiing by considering the ground bonding force saturation ***,the ground taxiing test is conducted,and the results show that the new configuration proposed in this paper presents a new solution for aircraft autonomous traction taxiing.

关键词： Autonomous traction taxi-ing Hydraulic secondary control Hydraulic motors Saturation characteristics Disturbance observation Speed control

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Dynamic Multihead Attention for Enhancing Neural Machine Translation Performance 5th

Dynamic Multihead Attention for Enhancing Neural Machine Tra...

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5th International Conference on Trends in Computational and Cognitive engineering, TCCE 2023

作者： Pandey, Mrinal Pandey, Rashmikiran Nazarov, Alexey Department of Radio Engineering and Cybernetics Moscow Institute of Physics and Technology Moscow Russia Federal Research Center Computer Science and Control Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9789819719228

The research paper delves into the realm of "Attention-Based Neural Machine Translation for Multilingual Communication", focusing on the revolutionary impact of attention mechanisms in enhancing cross-language understanding. Through dynamic allocation of focus to pertinent segments of source sequences, attention mechanisms have significantly improved the precision and coherence of translations, playing a pivotal role in multilingual communication. The paper underscores the importance of this technology in addressing the complexities of aligning words across diverse languages and maintaining grammatical accuracy, crucial for effective cross-lingual interactions. The study also presents a visual flowchart outlining the core components of attention-based NMT, encompassing the encoder, decoder, and attention context. Moreover, the paper extrapolates the future trajectory of attention-based NMT, identifying areas for continued exploration and innovation. researchers are urged to refine attention models to cater to intricate linguistic structures, potentially unveiling novel mechanisms that strike a balance between capturing long-range dependencies and computational efficiency. Furthermore, the paper anticipates the integration of attention-based NMT with multimodal inputs, unlocking the potential for comprehensive communication by incorporating visual and auditory cues. These advancements hold the promise of revolutionising multilingual communication, shaping a future where language barriers are transcended in various domains, from global diplomacy to education and beyond. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Neural machine translation

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Design of a high-precision current source system for tunable laser driving 5

Design of a high-precision current source system for tunable...

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2023 5th International Conference on Energy, Power and Grid, ICEPG 2023

作者： Gui, Peng Zhao, Chuang Zhao, Lei Liu, Wenyang Chen, Zitian Mu, Cheng Zhang, Yuhuan Beijing Spacecraft China Technology Corporation Beijing100094 China Control Engineering Aerospace Science and Beijing Space Power Conversion Research Center Beijing100094 China

Fiber Bragg Grating (FBG), which is an Optical Fiber Sensor with high sensitivity, light weight, and strong anti-interference ability, can realize the measurement of physical quantities, such as temperature and strain. The sensor network formed by FBG sensors is through wavelength division multiplexing, which greatly reduced the difficulty of sensor wiring. Therefore, FBG sensors are widely used in sensing fields such as aerospace, bridges and tunnels. As a wavelength-modulated Optical Fiber Sensor, FBG's sensing accuracy depends not only on the performance of the laser, but also on the stability of the driving current. In this paper, a high-precision current source system for laser S7500 modulation drive is designed, with a resolution of output current is higher than 2uA. and the laser S7500 is continuously linearly scanned at 20pm intervals in the wavelength range of 1527nm to 1567nm. The wavelength accuracy of the output optical signal is better than 2pm. The test results prove that the system has the advantages of high modulation speed, good stability and high reliability, and can be applied to high-precision FBG sensor networks. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Sensor networks

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Mesoporous amorphous FeOOH-encapsulated BiO_(2–x) photocatalyst with harnessing broad spectrum toward activation of persulfate for tetracycline degradation

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Chinese Journal of Chemical engineering 2024年第7期71卷 235-248页

作者： Pengfei Wu Zhaolong Liu Li Wu Yingkun Zhang Bing Wang Zhanghao Cheng Wenquan Cui Xiangyang Lv Qingling Liu Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China Hebei Pollution Control Technology Innovation Center of Steel and Coking Industry Department of Environmental and Chemical EngineeringHebei College of Industry and TechnologyShijiazhuang 050091China Hebei Key Laboratory of Environmental Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China Hebei Academy of Product Quality Supervision&Inspection Shijiazhuang 050227China

With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic *** this work,to overcome the drawbacks of the photocatalytic activity reduction caused by the photo-corrosion of non-stoichiometric BiO_(2–x),a novel material with amorphous FeOOH in situ grown on layered BiO_(2–x) to form a core-shell structure similar to popcorn chicken-like morphology was produced in two simple and environmentally beneficial *** a series of degradation activity tests of hybrid materials under different conditions,the as-prepared materials exhibited remarkable degradation activity and stability toward tetracycline in the FeOOH@BiO_(2–x)/Vis/PS system due to the synergism of photocatalysis and persulfate *** results of XRD,SEM,TEM,XPS,FTIR,and BET show that the loading of FeOOH increases the specific surface area and active sites appreciably;the heterogeneous structure formed by FeOOH and BiO_(2–x) is more favorable to the effective separation of photogenerated *** optimal degradation conditions were at a catalyst addition of 0.7 g·L^(–1),a persulfate concentration of 1.0 g·L^(–1),and an initial pH of 4.5,at which the degradation rate could reach 94.7%after 90 *** influence of typical inorganic anions on degradation was also *** studies and radical quenching experiments revealed that·OH,SO_(4)^(-)·,and·O_(2)^(-)were the principal active species generated during the degradation of *** results of the 1,10-phenanthroline approach proved that the effect of dissolved iron ions on the tetracycline degradation was limited,and the interfacial reaction that occurs on the active sites on the material's surface was a critical *** work provides a novel method for producing efficient broad-spectrum Bismuth-based composite photocatalysts and photocatalytic-activated persulfate synerg

关键词： Amorphous FeOOH BiO_(2–x) Activated persulfate Photocatalytic Tetracycline degradation

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Getting insights into gas-phase sulfation effect on catalytic performance of praseodymium oxides in NH_(3)-SCR of NO

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Journal of Rare Earths 2023年第6期41卷 952-958,I0005页

作者： Yandi Cai Peng Yang Qinglong Liu Kaili Ma Wenxin Ma Wang Song Qiuhui Qian Fei Gao Wei Tan Lin Dong State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentJiangsu Key Laboratory of Vehicle Emissions ControlCenter of Modern AnalysisKey Laboratory of Mesoscopic Chemistry of MOESchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Analysis and Testing Center Southeast UniversityNanjing 211189China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China

Sulfation treatment has been widely used to promote the catalytic performance of ceria(CeO_(2))based catalysts for the selective catalytic reduction of NO by NH_(3)(NH_(3)-SCR of NO).Praseodymium oxide(PrO_(x)),another commonly used rare earth material with similar structural properties as CeO_(2),also shows satistactory redox properties due to the facile redox cycle of Pr^(3+)■Pr^(4+).In this work,gas phase sulfation treatment with varied duration was performed on PrO_(x) at 200℃,and the NH_(3)-SCR activity of sulfated PrO_(x) was *** on the results of systematic characterizations(e.g.,N_(2)-physisorption,NH_(3) oxidation,NO oxidation,in situ diffuse Fourier transform infrared spectroscopy),it is revealed that the catalytic performance of sulfated PrO_(x)is highly dependent on the sulfation time(or the amount of sulfate species deposited on PrO_(x)),which has a significant impact on the competitive reaction between NH_(3) oxidation and NH_(3)-SCR of NO,thus determining the NH_(3)-SCR activity of PrO_(x).This work provides new insight into tuning the interaction between PrO_(x) surface and reactants(NO,NH_(3))via sulfation treatment,which cam guide the design and application of PrO_(x)based catalysts for NH_(3)-SCR of NO in the future.

关键词： NH_(3)-SCR Praseodymium oxides Sulfation treatment Surface acidity NH_(3)oxidation Rare earths

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Well-oriented magnesium hydroxide nanoplatelets coating with high corrosion resistance and osteogenesis on magnesium alloy

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Journal of Magnesium and Alloys 2024年第8期12卷 3292-3307页

作者： Ya Shu Feng Peng Zhi-Hui Xie Qiwen Yong Liang Wu Juning Xie Mei Li Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong637002China Medical Research Institute Department of OrthopedicsGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080China College of Materials Science and Engineering/National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China

Magnesium alloys are nontoxic and promising as orthopedic metallic implants,but preparing a biocompatible Mg(OH)_(2)layer with high corrosion protection ability remains *** is generally believed that the Mg(OH)_(2)layer,especially that formed in a natural condition,cannot provide desirable corrosion resistance in the community of corrosion and ***,several Mg(OH)_(2)coatings were prepared by changing the pH values of sodium hydroxide *** coatings were composed of innumerable nanoplatelets with different orientations and showed distinguished capability in corrosion *** nanoplatelets were well-oriented with their ab-planes parallel to,instead of perpendicular to,the magnesium alloy surface by raising the pH value to *** specific orientation resulted in the optimal coating showing long-term corrosion protection in both in vitro and in vivo environments and good osteogenic *** finds manifest that the environment-friendly Mg(OH)_(2)coating can also provide comparable and better corrosion protection than many traditional chemical conversion films(such as phosphate,and fluoride).

关键词： Magnesium alloy Corrosion Coating Magnesium hydroxide Biomaterials

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Bridge crack segmentation algorithm based on the novel full convolutional neural network

Bridge crack segmentation algorithm based on the novel full ...

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2023 International Conference on Computer Application and Information Security, ICCAIS 2023

作者： Bai, Yun Wang, Haobo Xing, Feng Lu, En Liu, Wencong Engineering Training Center Xi'an University of Science & Technology Shaanxi Xi'an China School of Electric and Control Engineering Xi'an University of Science & Technology Shaanxi Xi'an China

ISBN: (纸本)9781510675032

Considering the impact of background noise, the traditional bridge crack detection method cannot completely extract the crack features and effectively fuse them, resulting in low crack detection accuracy, false and missed detection. This paper presents a bridge crack detection algorithm based on improved U-Net (I-U-Net) network, specifically designed to address the mentioned challenges. Firstly, the residuals module with bottleneck structure (Res-Bot) is combined with the U-Net model to obtain complete crack information. Secondly, in order to eliminate the interference of background noise, optimized convolutional block attention module (O-CBAM) is introduced, adding dimensionality reduction convolutional layer and dilated convolutional layer, which effectively reduces the number of network parameters while simultaneously improving the feature extraction capabilities of the network. Thirdly, based on the idea of multi-size fusion, different sizes of convolution kernels are selected according to different levels to extract crack information, and the encoder-decoder-multi-size fusion (EDMSF) module is constructed. Finally, the effectiveness of the I-U-Net network is demonstrated through the public bridge crack dataset and the self-made dataset. © 2024 SPIE.

关键词： Crack detection

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