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Multi-model ensemble learning for battery state-of-health estimation:Recent advances and perspectives

Journal of Energy Chemistry 2025年第1期100卷 739-759页

作者： Chuanping Lin Jun Xu Delong Jiang Jiayang Hou Ying Liang Zhongyue Zou Xuesong Mei State Key Laboratory for Manufacturing Systems engineering Xi'an Jiaotong University Shaanxi Key Laboratory of Intelligent Robots School of Mechanical Engineering Xi'an Jiaotong University Department of electrical engineering and Automation Luoyang Institute of Science and Technology school of mechanical engineering Hangzhou Dianzi University

The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health(SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models,integrating multiple models for SOH estimation has received considerable attention. Ensemble learning(EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ens

关键词： Lithium-ion battery State-of-health estimation Data-driven Machine learning Ensemble learning Ensemble diversity

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Research status and prospects of the fractal analysis of metal material surfaces and interfaces

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International Journal of Minerals,Metallurgy and materials 2025年第1期32卷 20-38页

作者： Qinjin Dai Xuefeng Liu Xin Ma Shaojie Tian Qinghe Cui Beijing Advanced Innovation Center for materials Genome engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China school of mechanical and electrical engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

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Adaptive Control of a Flexible Manipulator With Unknown Hysteresis and Intermittent Actuator Faults

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 148-158页

作者： Shouyan Chen Weitian He Zhijia Zhao Yun Feng Zhijie Liu Keum-Shik Hong school of mechanical and electrical engineering Guangzhou University the school of Control Science and engineering Shandong University IEEE the College of electrical and Information engineering Hunan University the National engineering Research Center for Robot Visual Perception and Control Technology Hunan University the school of Intelligence Science and Technology University of Science and Technology Beijing (USTB) the Institute for future the School of AutomationQingdao University the school of mechanical engineering Pusan National University

In this study, we consider a single-link flexible manipulator in the presence of an unknown Bouc-Wen type of hysteresis and intermittent actuator faults. First, an inverse hysteresis dynamics model is introduced, and then the control input is divided into an expected input and an error compensator. Second,a novel adaptive neural network-based control scheme is proposed to cancel the unknown input hysteresis. Subsequently,by modifying the adaptive laws and local control laws, a fault-tolerant control strategy is applied to address uncertain intermittent actuator faults in a flexible manipulator system. Through the direct Lyapunov theory, the proposed scheme allows the state errors to asymptotically converge to a specified interval. Finally,the effectiveness of the proposed scheme is verified through numerical simulations and experiments.

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Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui Guo Yun Chen Hao Zhang Jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping Wong State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China school of Electromechanical engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China school of materials Science and engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator Precision processing Graphene electrode Self-powered sensor

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Influence of graphene nanoplatelets on mechanical properties and adhesive wear performance of epoxy-based composites

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Friction 2021年第4期9卷 856-875页

作者： K.Y.EAYAL AWWAD B.F.YOUSIF Khosro FALLAHNEZHAD Khalid SALEH Xuesen ZENG Faculty of Health Engineering and SciencesUniversity of Southern QueenslandToowoombaQLDAustralia centre for future materials University of Southern QueenslandToowoombaQLDAustralia school of mechanical and Mining engineering University of QueenslandBrisbaneQLDAustralia

Epoxy resin is one of the most widely used thermoset polymers in high-performance composite materials for lightweight ***,epoxy has a high coefficient of friction,which limits its tribological *** this study,the effect was investigated of different weight fractions of solid lubricant graphene nanoplatelets(GNPs),ranging from 0 to 4.5 wt%,on mechanical and adhesive wear performance of *** wear tests covered mild and severe wear *** correlation of tribological and mechanical properties was studied as *** electron microscopy(SEM)was used to observe the failure mechanisms for both tribological and mechanical samples after each *** results revealed that the addition of GNPs to the epoxy improved its stiffness and hardness but reduced its fracture strength and *** wear performance exhibited high efficiency with GNP additions and showed reductions in the specific wear rate,the coefficient of friction,and the induced interface temperature by 76%,37%,and 22%,respectively.A fatigue wear mechanism was predominant as the applied load *** importantly,severe wear signs occurred when the interface temperature reached the heat distortion temperature of the *** tribological,and mechanical properties showed only a weak correlation to each *** addition of GNPs to epoxy by less than 4.5 wt%was highly efficient to improve the wear performance while maintaining the fracture strength and *** transform infrared spectroscopy(FTIR)analysis shows no chemical interaction between the epoxy matrix with GNPs,which implies its physical interaction.

关键词： graphene nanoplatelets epoxy adhesive wear solid lubricants

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Enhancing thermoelectric performance of Cu-modified Bi0.5Sb1.5Te3 by electroless plating and annealing

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Progress in Natural Science:materials International 2018年第2期28卷 218-224页

作者： Zhongyue Huang He Zhang Kun Zheng Xueting Dai Yuan Yu Hefa Cheng Fangqiu Zu Zhi-Gang Chen school of materials Science & engineering Hefei University of Technology Institute of Microstructure and Properties of Advanced materials Beijing University of Technology centre for future materials University of Southern Queensland materials engineering The University of Queensland

With the capacity of energy conversion from heat to electricity directly, thermoelectric materials have been considered as an alternative solution to global energy crisis. In this work, Cu modified Bi0.5Sb1.5Te3(BST)composites are prepared by a facile electroless plating Cu method, spark plasma sintering, and annealing. The annealed 0.22 wt.%Cu/BST has an enhanced peak Figure of Merit(z T) of0.71 at 573 K with high average z T of0.65 in the wide temperature range between 300 and 573 K. Due to the significant increase of electrical conductivity and low lattice thermal conductivity, the annealed 0.22 wt.%Cu/BST shifts peak z T to high temperature, and shows 492% enhancement than that of pristine BST with z T of 0.12 at 573 K. Through detailed structural characterization of the annealed 0.22 wt.%Cu/BST, we found that Cu can dope into BST matrix and further form Cu2 Te nanoprecipitates, dislocations, and massive grain boundaries, leading to a low lattice thermal conductivity of 0.30 Wm-1 K-1 in the annealed 0.22 wt.%Cu/BST. Such enhanced peak z T in high-temperature and high average z T in the wide temperature range shows that the electroless plating Cu method and annealing can improve the thermoelectric performance of commercial BST and expand the applicability of Bi2Te3thermoelectric materials in the power generations.

关键词： Bi0.5Sb1.5Te3 Thermoelectric materials Electroless plating Annealing Average zT

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Synergistically Toughening Effect of SiC Whiskers and Nanoparticles in Al_2O_3-based Composite Ceramic Cutting Tool Material

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Chinese Journal of mechanical engineering 2016年第5期29卷 977-982页

作者： LIU Xuefei LIU Hanlian HUANG Chuanzhen WANG Limei ZOU Bin ZHAO Bin centre for Advanced Jet engineering Technologies School of Mechanical EngineeringShandong University school of mechanical and electrical engineering Qilu Institute of Technolegy Key Laboratory of High Efficiency and Clean mechanical Manufacture of Ministry of Education Shandong University

In recent decades, many additives with different characteristics have been applied to strengthen and toughen Al2O3-based ceramic cutting tool materials. Among them, SiC whiskers and SiC nanoparticles showed excellent performance in improving the material properties. While no attempts have been made to add SiC whiskers and SiC nanoparticles together into the ceramic matrix and the synergistically toughening effects of them have not been studied. An Al2O3-SiCw-SiC np advanced ceramic cutting tool material is fabricated by adding both one-dimensional SiC whiskers and zero-dimensional SiC nanoparticles into the Al2O3 matrix with an effective dispersing and mixing process. The composites with 25 vol% SiC whiskers and 25 vol% SiC nanoparticles alone are also investegated for comparison purposes. Results show that the Al2O3-SiCw-SiCnp composite with both 20 vo1% SiC whiskers and 5 vol% SiC nanoparticles additives have much improved mechanical properties. The flexural strength of Al2O3-SiCw-SiCnp is 730＋ 95 MPa and fracture toughness is 5.6 ± 0.6 MPa.m1/2. The toughening and strengthening mechanisms of SiC whiskers and nanoparticles are studied when they are added either individually or in combination. It is indicated that when SiC whiskers and nanoparticles are added together, the grains are further refined and homogenized, so that the microstructure and fracture mode ratio is modified. The SiC nanoparticles are found helpful to enhance the toughening effects of the SiC whiskers. The proposed research helps to enrich the types of ceramic cutting tool and is benefit to expand the application range of ceramic cutting tool.

关键词： Al2O3-based ceramic cutting tool materials SiC whiskers SiC nanoparticles mechanical properties,toughening and strengthening mechanisms

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Effects of Vibration Characteristics on the Atomization Performance in the Medical Piezoelectric Atomization Device Induced by Intra-Hole Fluctuation

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Chinese Journal of mechanical engineering 2021年第6期34卷 331-339页

作者： Qiufeng Yan Wanting Sun Lei Zhang Hongmei Wang Jianhui Zhang school of electrical engineering Nantong UniversityNantong226019China school of materials Science and engineering Harbin Institute of TechnologyHarbin150001China College of mechanical and electrical engineering Guangzhou UniversityGuangzhou510006China

Oral inhalation of aerosolized drugs has be widely applied in healing the affected body organs including lesions of the throat and lungs and it is more effiicient than those conventional therapies,such as intravenous drip,intramuscular injection and external topical administration in the aspects of the dosage reduction and side effects of ***-theless,the traditional atomization devices always exhibit many *** example,non-uniformed atomization particle distribution,the instability of transient atomization quantity and difficulties in precise energy control would seriously restrict an extensive use of atomization inhalation *** this study,the principle of intra-hole fluctua-tion phenomenon occurred in the hole is fully explained,and the produced volume change is also ***-tionally,the mathematical expression of the atomization rate of the atomizing device is well *** mecha-nism of the micro-pump is further clarified,and the influence of the vibration characteristics of the atomizing film on the atomization behavior is analyzed *** curves of sweep frequency against the velocity and amplitude of the piezoelectric vibrator are obtained by the Doppler laser vibrometer,and the corresponding mode shapes of the resonance point are *** influence of vibration characteristics on atomization rate,atomization height and atomization particle size are also verified by experiments,*** the experimental results and theoretical calculation are expected to provide a guidance for the design of this kind of atomization device in the future.

关键词： Piezoelectric Intra-hole fluctuation Vibration characteristics Atomization

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Research advances on electrode materials for solid oxide electrolysis cells

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Progress in Natural Science:materials International 2023年第3期33卷 309-319页

作者： Hongyuan Su Duoli Wu Chengxin Li Changjiu Li Chao Zhang College of mechanical engineering Yangzhou University State Key Laboratory for mechanical Behavior of materials School of Materials Science and Engineering Xi'an Jiaotong University

Solid oxide electrolytic cell(SOEC) is an energy conversion device that transfers electrical energy into chemical energy. It has garnered significant attention due to its high efficiency and thick current density. The oxygen evolution reaction(OER) and the hydrogen evolution reaction(HER) are two crucial half-reactions of SOEC, while both require excellent electrochemical performance under high-temperature and high-humidity ***, high catalytic activity and good stability of electrode materials are crucial for the practical application of SOEC. The perovskite structure of the oxygen electrodes has outstanding OER activity, while metal ceramic and metal oxide hydrogen electrodes possess good redox properties. This article firstly demonstrates the influence of the physical and electrochemical properties of electrode materials on the performance of SOEC, then illustrates the optimization strategies for electrode materials to improve electrolysis efficiency and extend service ***, the research priorities for the future development of electrode material are summarized.

关键词： Solid oxide electrolysis cell Oxygen electrode Hydrogen electrode Perovskite oxide

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Full-spectrum responsive photocatalytic activity via non-noble metal Bi decorated mulberry-like BiVO_(4)

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Journal of materials Science & Technology 2021年第24期83卷 102-112页

作者： Yaxin Bi Yanling Yang Xiao-Lei Shi Lei Feng Xiaojiang Hou Xiaohui Ye Li Zhang Guoquan Suo Siyu Lu Zhi-Gang Chen school of materials Science and engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an710021China centre for future materials University of Southern QueenslandSpringfieldQLD4300Australia school of mechanical and Mining engineering The University of QueenslandBrisbaneQLD4072Australia College of Chemistry and Molecular engineering Zhengzhou UniversityZhengzhou 450001China

Due to its appropriate bandgap(~2.4 e V)and efficient light absorption,bismuth vanadate(Bi VO_(4))shows promising photocatalysis ***,the charge carrier recombination and poor electron transmission often induce poor photocatalytic ***,we report a new method to in-situ synthesize non-noble metal Bi decorated mulberry-like Bi VO_(4)by a two-step calcination *** characterizations reveal that non-noble metal Bi nanoparticles grown in-situ on Bi VO_(4)result in the red-shift of the absorbance edge,greatly extending the light absorption from the ultraviolet into the near-infrared *** surface plasmon resonance excitation of Bi nanoparticles and synergetic effects between Bi and Bi VO_(4)effectively improve the photocatalytic efficiency and promote the separation of photoinduced electron-hole pairs in mulberry-like Bi VO_(4).Density functional theory(DFT)calculation results further verify that the electrons are transferred from Bi to Bi VO_(4)and the formation of·OH radical in Bi/Bi VO_(4)is attributed to the lower simulated free energy,which supports our experimental *** work provides a novel strategy to enhance light absorption and promote efficient solar utilization of photocatalysts for practical applications.

关键词： Bi BiVO_(4) Photocatalysis Full-spectrum Density functional theory

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