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Maximum Power Point Tracking Using a Multimode Hunter-Prey Optimization Algorithm for Gradually Varying Power in Centralized Thermoelectric Generation System

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Energy technology 2025年第0期

作者： Zhu, Wenchao Li, Peng Yang, Wenlong Xie, Changjun Li, Hao Yang, Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan430070 China School of Automation Wuhan University of Technology Wuhan430070 China Wuhan Industrial Technology Institute of Artificial Intelligence and New Energy Vehicles Wuhan430119 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

The unstructured power outputs from thermoelectric generator (TEG) systems have precipitated the advancement of maximum power point tracking (MPPT) methods toward more intelligent solutions. This article concentrates on centralized TEG systems which work during nonuniform distribution of temperature cases and introduce the hunter-prey optimization algorithm with multimode updating (MMUHPO). Existing MPPT methods based on metaheuristic algorithms pay attention to improving tracking speed, efficiency, oscillation, and call frequency. However, in scenarios marked by gradual changes in power characteristics, the precision of MPPT algorithms can lead to frequent oscillatory searches and elevated computational demands. MMUHPO reduces power loss and simplifies algorithm complexity by improving the original mechanism and introducing termination mechanism and multimode update mechanism. Herein, the proposed algorithm is compared with several widely used MPPT algorithms based on metaheuristic algorithms under five different operating conditions. Remarkably, the MMUHPO algorithm demonstrates a substantial enhancement in energy collection efficiency, with the increase in efficiency reaching up to 109.8%. Finally, real-time data simulation experiments corroborate the exceptional tracking performance of the proposed algorithm. © 2025 Wiley-VCH GmbH.

关键词： Heuristic algorithms

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Atomic-Scale Mechanisms for Achieving Ultra-High Controllable Electrical Properties in Perovskite Bifeo3

SSRN

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SSRN 2024年

作者： Lu, Yongshen Chen, Fangze Zhang, Jinyong Ren, Lin Wang, Weimin Zhang, Fan Fu, Zhengyi Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Defect engineering strategies are usually expected to enhance electrical, thermal, and optical functionality while tuning the mechanical properties of materials. Here, we employe atomic-scale imaging to characterize the atomic structural positions in bismuth ferrite (BFO)BFO films and demonstrate the precise positions of quantitatively doped ions within the BFO unit cell. Well-controlled oxygen vacancy contents in BFO crystals were engineered via the accurate introduction of Zr and Mn ions, resulting in extraordinary and stable large-signal ferroelectric properties (Pr ~ 206.2 µC/cm2 and J ~ 2.2×10-9 A/cm2), magnetic properties (4.95 emu/cm3) and a reduced bandgap (Eg = 2.16 eV). Furthermore, we used computational processing to obtain the coupling of the spin and charge redistributions of iron, resulting in changes in spontaneous polarization. An atomic-scale study enhanced our understanding of the effects of chemical modifications on the ferroelectricity/ferromagnetism structure. This defect engineering approach enables us to customize and optimize local ferroelectric and ferromagnetic order parameters, providing a foundation for designing functionalities in a wide range of functional material systems. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

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Tailoring Microstructure and Mechanical Property of Pure Tungsten Via Laser Powder Bed Fusion

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SSRN 2023年

作者： Xiong, Zhengang Ma, Wenyou Deng, Zhaoyang Yu, Chunfeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Institute of New Materials Guangdong Academy of Sciences Guangzhou510650 China

Microstructure tailoring is a fascinating project for material scientists that enables the mechanical properties of metallic parts to be customized. In this study, a series of laser parameter settings were implemented to manufacture dense tungsten parts and three laser travelling strategies were developed to tailor the microstructure via laser powder bed fusion (LPBF). A novel brick-stacking structure and interlocked S-shaped grains were observed in these dense samples. Among different strategy tungsten builds, typical indentation size effect (ISE) was found based on the indentation responses. As-measured indentation hardness could be thought of the sum of contribution from surface and volume. Although their ISE was similar, the contribution from plastically volume work varied, which could be primarily interpreted by rotation strategy. The rotation strategy significantly reduced the grain size and thermal stress during laser manufacturing, resulting in higher true hardness (~ 3.5 GPa). Additionally, the compression properties and associated fracture behavior of tungsten specimens manufactured by the different strategies were also compared. Therefore, these findings show that controlling laser travelling strategy during the LPBF process could be a powerful avenue to tailor the microstructure and performance of the customized components. © 2023, The Authors. All rights reserved.

关键词： Hardness

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界面工程实现Au@MoS_(2)核壳异质结在等离激元学和光电子学领域卓越的热载流子输运动力学

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Science China materials 2023年第10期66卷 3931-3940页

作者：刘然朱翔宇刘盛洪欧阳德才马小茜夏芳芳余一梦张悍吴劲松刘世元梁文锡李渊翟天佑 State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of TechnologyWuhan 430070China School of Engineering and Materials Science Queen Mary University of LondonMile End RoadLondonE14NSUK State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China

贵金属和二维半导体构建的异质结为等离激元纳米结构产生的热载流子提供了独特的电荷传输路径,有望应用于各种等离激元和光电子器件.然而,传统异质结构的电荷转移速度和效率通常受限于有限的界面面积和不可避免的界面污染.本文中,具有... 详细信息

贵金属和二维半导体构建的异质结为等离激元纳米结构产生的热载流子提供了独特的电荷传输路径,有望应用于各种等离激元和光电子器件.然而,传统异质结构的电荷转移速度和效率通常受限于有限的界面面积和不可避免的界面污染.本文中,具有原子级清洁和较大接触界面的新型Au@MoS_(2)核壳异质结构能够实现超快和高效的热电子转移.飞秒瞬态吸收光谱研究表明,Au@MoS_(2)中从金纳米颗粒到MoS_(2)的热电子注入时间常数小于244 fs,而机械转移方法制备的Au/MoS_(2)对照样品的热电子注入时间常数为493 fs,同时,电荷转移效率从Au/MoS_(2)的3.33%提升至Au@MoS_(2)的25.3%.开尔文探针力显微镜和离散偶极近似研究进一步证明了上述结果,明显改善的电荷转移归因于原子级清洁和完全封装的异质结界面.这项研究提供了贵金属-二维半导体异质结构内固有电荷转移的基本理解,从而展现了Au@MoS_(2)这一新型异质结结构在等离激元和光电子器件中的应用前景.

关键词： 2D materials MoS_(2) heterostructures optoelectronics plasmonics

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Mn4+activated phosphors in photoelectric and energy conversion devices

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能源化学 2023年第11期86卷 277-299页

作者： Yang Ding Chunhua Wang Lang Pei Qinan Mao Sateesh Bandaru Runtian Zheng Soumyajit Maitra Meijiao Liu Li-Hua Chen Bao-Lian Su Jiasong Zhong College of Materials and Environmental Engineering Hangzhou Dianzi UniversityHangzhou 310018ZhejiangChina School of Energy and Environment City University of Hong KongKowloon 99077Hong KongChina Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de Bruxelles B-5000NamurBelgium Department of Materials University of OxfordOxford OX1 3PHUK School of Chemistry and Chemical Engineering Zhejiang Sci-Tech UniversityHangzhou 310018ZhejiangChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of Inorganic Materials Chemistry(CMI) University of Namur61 rue de Bruxelles B-5000NamurBelgium State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Owing to their high luminous efficiency and tunable emission in both red light and far-red light regions,Mn4+ ion-activated phosphors have appealed significant interest in photoelectric and energy conversion devices such as white light emitting diode(W-LED),plant cultivation LED,and temperature *** to now,Mn4*has been widely introduced into the lattices of various inorganic hosts for brightly red-emitting ***,how to correlate the structure-activity relationship between host frame-work,luminescence property,and photoelectric device is urgently *** this review,we thor-oughly summarize the recent advances of Mn4+doped ***,several strategies like co-doping and defect passivation for improving Mn4+ emission are also *** importantly,the relationship between the protocols for tailoring the structures of Mn4+doped phosphors,increased luminescence performance,and the targeted devices with efficient photoelectric and energy conversion efficiency is deeply ***,the challenges and perspectives of Mn4+doped phosphors for prac-tical applications are *** cordially anticipate that this review can deliver a deep comprehen-sion of not only Mn4+luminescence mechanism but also the crystal structure tailoring strategy of phosphors,so as to spur innovative thoughts in designing advanced phosphors and deepening the applications.

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Structure and Tribological Evolution of Ta-N Layer by Controlling the Time of Microwave Plasma Nitriding

SSRN

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SSRN 2024年

作者： Li, Jiacheng Xu, Zhigang Peng, Jian Shen, Qiang Wang, Chuanbin State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Guangdong Chaozhou521000 China

The Ta-N layer on the Ta matrix surface was synthesized using microwave plasma nitriding (MPN) to enhance its wear resistance. The effects of holding time on the phase composition, morphology, mechanical properties, friction, and wear of the nitriding layers were systematically examined. The results revealed that nanocrystalline Ta-N layers with a dense surface and low roughness were successfully fabricated. The thickness of the Ta-N layer increased from 0.87 μm to 4.23 μm with prolonged holding time. The hardness of the Ta-N layer increased first and then decreased with the extension of holding time, and reached the maximum at 4h. Friction and wear test results indicated that the Ta-N layer exhibited superior wear resistance at the holding time of 4 h, which was mainly attributed to the synergy of dense structure and the generation of the nanocrystal. In conclusion, the Ta-N layer with the desired hardness and wear resistance was obtained due to MPN treatment, which offered excellent surface protection for the Ta matrix in terms of wear resistance. © 2024, The Authors. All rights reserved.

关键词： Nanocrystals

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Non‑Enzyme,Temperature Calibrating,and Bioactive Fiber‑based Flexible Sensors for Dopamine and Lactic Acid Detection

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advanced Fiber materials 2024年第2期6卷 501-511页

作者： Maowen Xie Guang Yao Xingyi Gan Chunhong Zhang Tianyao Zhang Qian Wang Xinqin Li Chenzheng Zhou Kangning Zhao Min Gao Taisong Pan Yuan Lin School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Medico‑Engineering Cooperation on Applied Medicine Research Center University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070HubeiChina

Flexible electrochemical biosensors enable the in-situ monitoring and quantification of human biochemical constituents in molecular scale,spearheading and thriving the field toward precision ***,specific biorecognition elements for multiplexed biomarkers detection,temperature stability and versatility need to be improved for higher ***,we propose a bioactive sensor patch comprising a non-enzyme Co_(3)O_(4)/carbon fiber-based biorecognition element and a temperature calibration *** optimized serpentine configuration renders the sensor intimate and seamless attachment with skin,operating robustly even subjected to 40%tensile *** fiber-based sensor could selectively monitor dopa-mine and lactic acid contents based on cyclic voltammetry and amperometry,*** bioanalytical results at room temperature indicate that the electrochemical biosensor has a wide detection range(0.001–1.100 mM for dopamine and 2–35 mM for lactic acid),excellent selectivity and reproducibility(maximum error 3.2%for dopamine and 5.6%for lactic acid).In addition,temperature calibration contour maps of these two biomarkers are established in an ambient temperature range from 25 to 45℃.The continuously collected data could be aggregated and wirelessly transmitted to portable devices using an electrochemical signal transducer and an acquisition module,promising personalized and preventative health care in various scenarios.

关键词： Bioactive fiber Electrochemical selectivity Dopamine Lactic acid Temperature calibration Sensor

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Frequency-Self-Adaptive Radio Frequency Power Harvester Enabled by Shape-Reconfigurable Liquid Metal

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Electromagnetic Science 2024年第2期2卷 91-103页

作者： Cheng Zhang Yuchao Wang Zebin Zhu Hai Lin Kun Wang Xintong Shi Yi Du Chaoyun Song Long Ren Qiang Cheng Key Laboratory of Materials for High-Power Laser Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China College of Physical Science and Technology Central China Normal UniversityWuhan 430000China Center of Quantum and Matter Science and School of Physics Beihang UniversityBeijing 100191China Department of Engineering King’s College LondonLondon WC2R 2LSUK State Key Laboratory of Radio Frequency Heterogeneous Integration College of Electronics and Information EngineeringShenzhen UniversityShenzhen 518000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430000China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

Radio frequency(RF)energy harvester as an efficient tool for capturing and converting the flourishing ambient RF energy provides a promising solution for long-term powering the wireless sensor networks and the Internet of things(IoTs).However,the actual distribution of the environmental RF signals is dynamically frequency-dependent due to the diverse wireless terminals only interacting with specified *** take full advantage of the RF energy carrying this characteristic,an intelligent RF energy harvester is in demand to automatically sense the frequency information of an incident signal and conduct the corresponding RF-to-direct current transformation ***,to the best of my knowledge,a frequency-self-adaptive RF harvester is first presented with the help of the shape-reconfigurable liquid metal,which can precisely identify and efficiently convert an arbitrary signal from the frequency span of 1.8 to 2.6 *** with a microcontroller unit and a tensile system,the dynamic functionality of the entire system is comprehensively demonstrated,showing promising potential to significantly advance various fields,including sustainable IoT applications,green wearable technologies,and self-powered devices.

关键词： Liquid metal Radio frequency power harvesting Frequency-self-adaptive Broadband rectification

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Step-scheme CdS/TiO_(2) nanocomposite hollow microsphere with enhanced photocatalytic CO_(2) reduction activity

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Journal of materials Science & technology 2020年第21期56卷 143-150页

作者： Zhongliao Wang Yifan Chen Liuyang Zhang Bei Cheng Jiaguo Yu Jiajie Fan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

Converting solar energy into chemical energy by artificial photosynthesis is promising in addressing the issues of the greenhouse effect and fossil fuel ***,a novel photocatalyst,***/TiO_(2) hollow microspheres(HS),were dedicatedly designed to boost overall photocatalytic ***_(2) nanoparticles were in-situ decorated on the inside and outside the shell of Cd S HS,ensuring close contact between TiO_(2) and *** CdS/TiO2 HS with abundant mesopores inside of the shell boost the light absorption via multiscattering effect as well as accessible to reactions in all *** heterojunction was scrutinized and the charge transfer across it was revealed by in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS).Ultimately,the charge transfer in this composite was determined to follow stepscheme mechanism,which not only facilitates the separation of charge carriers but also preserves strong redox *** from the intimate linkage between Cd S and TiO_(2) and the favorable step-scheme heterojunction,enhanced photocatalytic CO_(2) reduction activity was *** CH4 yield rate of CdS/TiO_(2) reaches 27.85μmol g^(–1) h^(–1),which is 145.6 and 3.8 times higher than those of pristine CdS and TiO_(2),*** work presents a novel insight into constructing step-scheme photocatalytic system with desirable performance.

关键词： Step-scheme heterojunction CdS TiO_(2) Hollow microspheres Photocatalytic CO2 reduction

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Research on the Influence of Thermal Barrier Coating on the Combustion and Emission Performance of Propanol Diesel Blended Fuel

SSRN

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SSRN 2024年

作者： Fei, Chunguang Shu, Zihao Yang, Ziming Zhu, Siwei Du, Yuxuan Wang, Xinyu Liu, Lu Qian, Zuoqin School of Naval Architecture Ocean and Energy Power Engineering Wuhan University of Technology Wuhan430063 China State Key Labof Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Mechanical Engineering Beijing Institute of Technology Beijing100081 China Dongfeng Commercial Vehicle Technology Center Wuhan430056 China

In the context of the current energy shortage and environmental pollution, the use of alternative fuels to reduce the consumption of fossil energies was becoming a trend. However, studies both domestically and internationally had shown that the high latent heat of vaporization and low cetane number characteristic of alcohol fuels greatly affected the fuel's atomization, evaporation, and combustion performance. This paper utilized the insulating effect of thermal barrier coatings to increase the temperature inside the cylinder, using this method to offset the impact of alcohol. Experimental results indicate that the addition of propanol extended the ignition delay period and shortened the combustion duration. The use of thermal barrier coatings countered the effect of propanol, thereby enhancing the engine's fuel atomization and combustion efficiency, and increasing the engine's thermal efficiency. The thermal efficiency increased by a maximum of 1.41%, while the combination of propanol-blended fuel and thermal barrier coatings resulted in an 18% reduction in particulate matter emissions. © 2024, The Authors. All rights reserved.

关键词： Diesel engines

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