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Thickness evolution of commercial Li-ion pouch cells with siliconbased composite anodes and NCA cathodes

Science China(Technological Sciences) 2021年第1期64卷 83-90页

作者： ZHANG XingYu HE Jie ZHOU Jiang CHEN HaoSen SONG WeiLi FANG DaiNing State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Explosion Science and Technology Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China Lishen Research Institute Tianjin Lishen Battery Joint-stock Co.Ltd.Tianjin 300384China State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing 100871China

It is significant to monitor the thickness change of commercial Li-ion pouch cells that are assembled from Si-based electrodes and layered cathodes since the volume variation is critically linked with kinetic reaction mechanism and chemomechanical degradation. In this work, the single-point and full-field measurements are conducted on the thickness evolution of Si Ox/Cgraphite/lithium nickel-cobalt-aluminum oxide(Si Ox-G/NCA) batteries. It is found that an abnormal overshoot that has been rarely observed in the previous studies appears at the beginning of discharge, which is believed to be the combined results between the rapid expansion of NCA and the contraction of graphite related to the state of charge(SOC). Compared with the results of single-point measurement, the spatial displacement distribution obtained from three-dimensional(3D) scanning suggests the full-field thickness evolution of the entire cell scale, which is more feasible and efficient to provide full-field information for supporting pouch cell design and pack integration.

关键词： thickness change 3D scanning silicon-based anode NCA cathode lithium-ion battery

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Design of an Embedded Leg Capsule Robot 20

Design of an Embedded Leg Capsule Robot

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20th IEEE International Conference on Mechatronics and Automation, ICMA 2023

作者： Wang, Yihui Xue, Tao Wang, Jing Yueliwasi, Yimuranjiang Tianjin University of Technology Tianjin Key Laboratory for Advanced Electromechanical System Design and Intelligent Control 391 Binshui Xidao Tianjin China Tianjin University of Technology National Demonstration Center for Experimental Mechanical and Electrical Engineering Education 391 Binshui Xidao Tianjin China

ISBN: (纸本)9798350320831

The capsule robot enters the patient's intestinal system directly by swallowing and takes continuous images using the miniature camera unit it carries, but during its travel, its own gravity and the peristaltic movement of the intestine make the physician limited in obtaining images of the intestine and making a diagnosis. In order to solve this problem, a capsule endoscope with an embedded leg mechanism is proposed. Compared to commercially available capsule robot. This capsule robot can easily move through the intestine autonomously by means of the relationship between the leg, the screw nut and the linkage, enabling forward, backward and stationary functions. The capsule robot has a diameter of 14 mm, a length of 30 mm and a maximum diameter of 26.66 mm with the legs spread out. The hollow space is allocated to include basic endoscopic components such as a miniature camera and a rotating motor. A series of tests, including in vitro tests, were carried out to test the feasibility of the leg mechanism of this capsule robot. Based on the results of the experiments, the proposed leg mechanism can effectively act on the Micro-capsule endoscope, and is able to move effectively through the intestine. © 2023 IEEE.

关键词： Machine design

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ZnIn2S4 nanosheets grown on biomass chitin-derived 3D carbon substrates as self-supporting high-efficiency photocatalysts for water splitting

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Biomass and Bioenergy 2025年 200卷

作者： Liu, Wenting Wu, Xiaoyu Wang, Feng Wu, Zhenzhen School of Automobile and Transportation Shenzhen Polytechnic University Shenzhen518055 China School of Materials Science and Engineering & Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin541004 China

The charge transfer within heterojunctions is a critical factor influencing the overall efficiency and stability of photocatalytic water splitting. In this context, a heterojunction of two-dimensional ZnIn2S4 nanosheets grown on two-dimensional chitin-derived N-doped carbon (Chitin-NC) nanosheets was fabricated, forming an integrated three-dimensional interconnected network architecture of Chitin-NC/ZnIn2S4 composite with visible light response. This well-designed stable structure exposes more catalytic active sites and promotes the separation and migration of photogenerated charges, demonstrating the excellent photocatalytic activity for hydrogen evolution and cyclic stability of the Chitin-NC/ZnIn2S4 composite. Under visible light irradiation, the optimized Chitin-NC/ZnIn2S4 achieved a hydrogen production rate of 0.665 mmol g−1 h−1 without the use of any co-catalysts. And the structure remained stable after multiple photocatalytic cycles. This achievement provides a new cost-effective and sustainable methodology for enhancing the efficiency of photocatalytic water splitting. © 2025

关键词： Nanosheets

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Diving into Underwater: Segment Anything Model Guided Underwater Salient Instance Segmentation and A Large-scale Dataset 41

Diving into Underwater: Segment Anything Model Guided Underw...

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41st International Conference on Machine Learning, ICML 2024

作者： Lian, Shijie Zhang, Ziyi Li, Hua Li, Wenjie Yang, Laurence Tianruo Kwong, Sam Cong, Runmin Hainan University China China Ministry of Education China Huazhong University of Science and Technology China St. Francis Xavier University Canada LIngnan University School of Data Science Hong Kong Shandong University School of Control Science and Engineering China Key Laboratory of Machine Intelligence and System Control Ministry of Education Jinan China

With the breakthrough of large models, Segment Anything Model (SAM) and its extensions have been attempted to apply in diverse tasks of computer vision. Underwater salient instance segmentation is a foundational and vital step for various underwater vision tasks, which often suffer from low segmentation accuracy due to the complex underwater circumstances and the adaptive ability of models. Moreover, the lack of large-scale datasets with pixel-level salient instance annotations has impeded the development of machine learning techniques in this field. To address these issues, we construct the first large-scale underwater salient instance segmentation dataset (USIS10K), which contains 10,632 underwater images with pixel-level annotations in 7 categories from various underwater scenes. Then, we propose an Underwater Salient Instance Segmentation architecture based on Segment Anything Model (USIS-SAM) specifically for the underwater domain. We devise an Underwater Adaptive Visual Transformer (UA-ViT) encoder to incorporate underwater domain visual prompts into the segmentation network. We further design an out-of-the-box underwater Salient Feature Prompter Generator (SFPG) to automatically generate salient prompters instead of explicitly providing foreground points or boxes as prompts in SAM. Comprehensive experimental results show that our USIS-SAM method can achieve superior performance on USIS10K datasets compared to the state-of-the-art methods. Datasets and codes are released on Github. Copyright 2024 by the author(s)

关键词： Pixels

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Advances of machining techniques for gradient structures in multi-principal-element alloys

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Rare Metals 2022年第12期41卷 4015-4026页

作者： Bo Li Chun-Ming Niu Tian-Long Zhang Gong-Yu Chen Gang Zhang Dong Wang Xiao-Ye Zhou Jia-Ming Zhu School of Civil Engineering Shandong UniversityJinan 250061China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Materials Science and Engineering College of Science and EngineeringHong Kong Institute for Advanced StudyCity University of Hong KongHong Kong 999077China School of Physics and Optoelectronics Technology Baoji University of Arts and SciencesBaoji 721016China Center of Microstructure Science Frontier Institute of Science and TechnologyXi'an Jiaotong UniversityXi’an 710049China Guangdong Province Key Laboratory of Durability for Marine Civil Engineering School of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China

Multi-principal-element alloys(MPEAs)are attracting increasing attentions because of their high strength and ductility,high fracture toughness,excellent corrosion resistance,outstanding thermal-softening resistance and high oxidation ***,gradient structures(GSs)have been shown to be effective in alleviating the strength-ductility trade-off although strength and ductility are mutually exclusive properties for metals,which provides an opportunity for developing highperformance ***,we summarized four processing methods for creating GSs in MPEAs,including rotationally accelerated shot peening(RASP),ultra-precision machining technology(UPMT),cyclic dynamic torsion(CDT),and ultrasonic surface rolling processing(USRP).Principles,advantages,disadvantages,and typical applications of these methods are discussed in this work.

关键词： Gradient structures(GSs) Multi-principalelement alloys(MPEAs) Strength-ductility trade-off Advanced processing technology

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Finite-Time Observer-Based Path-Following control of an Underactuated Surface Vehicle with Actuator Saturation and Fault

Finite-Time Observer-Based Path-Following Control of an Unde...

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International Conference on Fuzzy Theory and it's Applications (iFUZZY)

作者： Chengxiang Zhang Ning Wang School of Marine Engineering Dalian Maritime University Dalian China State Key Laboratory of Maritime Technology and Safety Dalian Key Laboratory of Green Power Control and Test for Intelligent Ships

ISBN: (数字)9798350352788

ISBN: (纸本)9798350352795

In this paper, a finite-time observer-based fault-tolerant control (F-FTC) scheme is proposed to address path following problem of an underactuated surface vehicle suffering from input saturation and actuator gain degradation. First, a finite-time observer is designed to accurately detect faults and complex system uncertainties within the faulty system. Second, a smooth dead-zone operator-based model is applied to avoid the potential non-differentiability in controller. Finally, the F-FTC is established by virtue of a first-order filtering system. Lyapunov theory is used to verify the closed-loop system stability while simulations experiments validate the merits of the proposed F-FTC scheme.

关键词： Degradation Actuators Fault tolerance Uncertainty Filtering Fault tolerant systems Observers

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Heterostructured bimetallic phosphide nanowire arrays with latticetorsion interfaces for efficient overall water splitting

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Journal of Energy Chemistry 2023年第2期77卷 420-427,I0011页

作者： Hua Zhang Hongyi Li Yintang Zhou Fang Tan Ruijie Dai Xijun Liu Guangzhi Hu Laiming Jiang Anran Chen Renbing Wu School of Materials and Energy Institute for Ecological Research and Pollution Control of Plateau LakesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091YunnanChina Department of Materials Science Fudan UniversityShanghai 200433China Guangzhou Panyu Polytechnic Guangzhou 511483GuangdongChina National Engineering Research Center for Marine Aquaculture Marine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004ZhejiangChina MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004GuangxiChina Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610065SichuanChina

Designing cost-effective and high-efficiency electrocatalysts is critical to the water splitting performance during hydrogen ***,we have developed Fe_(2)P-Co_(2)P heterostructure nanowire arrays with excellent lattice torsions and grain boundaries for highly efficient water *** to the microstructural investigations and theoretical calculations,the lattice torsion interface not only contributes to the exposure of more active sites but also effectively tunes the adsorption energy of hydrogen/oxygen intermediates via the accumulation of charge *** a result,the Fe_(2)P-Co_(2)P heterostructure nanowire array exhibits exceptional bifunctional catalytic activity with overpotentials of 65 and 198 mV at 10 mA cm^(-2) for hydrogen and oxygen evolution reactions,***,the Fe_(2)P-Co_(2)P/NF-assembled electrolyzer can deliver 10 mA cm^(-2) at an ultralow voltage of1.51 V while resulting in a high solar-to-hydrogen conversion efficiency of 19.8%in the solar-driven water electrolysis cell.

关键词： Transition metal phosphide Lattice torsion Heterogeneous interfaces Water splitting Theoretical calculation

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Influence of Acid Treatment on Pore Structure and Fractal Characterization of a Tight Sandstone:A Case Study from Wudun Sag,Dunhuang Basin

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Acta Geologica Sinica(English Edition) 2023年第2期97卷 562-572页

作者： GENG Weile WANG Jiandong ZHANG Xuecai WANG Jun DONG Chenqiang ZHOU Guangqing HUANG Gun LI Lin State Key Laboratory of Coal Mine Disaster Dynamics and Control School of Resources and Safety EngineeringChongqing UniversityChongqing 400030China School of Safety and Management Engineering Hunan Institute of TechnologyHengyangHunan 421002China Oil and Gas Exploration Management Centre Shengli Oilfield CompanySINOPECDongyingShandong 257000China Xinjiang Xinchun Petroleum Development Company Limited SINOPECDongyingShandong 257000China

In this study,X-ray diffraction,N_(2)adsorption(N_(2)A),and mercury intrusion(MI)experiments were used to investigate the influence of acid treatment on pore structure and fractal characterization of tight *** results showed that acid treatment generated a certain number of ink-bottle pores in fine sandstone,aggravated the ink-bottle effect in the sandy mudstone,and transformed some smaller pores into larger *** the acid treatment,both the pore volume in the range of 2–11 nm and 0.271–8μm for the fine sandstone and the entire pore size range for the sandy mudstone significantly *** dissolution of sandstone cement causes the fine sandstone particles to fall off and fill the pores;the porosity increased at first but then decreased with acid treatment *** fractal dimension obtained using the Frenkel-Halsey-Hill model was positively correlated with acid treatment ***,the total fractal dimensions obtained by MI tests showed different changes with acid treatment time in fine sandstone and sandy *** results provide good guiding significance for reservoir acidification stimulation.

关键词： pore structure acid treatment full pore size distribution fractal dimension tight sandstone

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Elimination of Buried Interface Defects for Highly Efficient and Stable Wide-Bandgap Perovskite Solar Cells

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Chinese Journal of Chemical Physics 2025年第2期38卷 231-239,I0020-I0034,I0040,I0041页

作者： Kun Chen Yu Chen Yang Shen Weijian Tang Xiaojia Zheng WenHua Zhang Shangfeng Yang Sichuan Research Center of New Materials Institute of Chemical MaterialsChina Academy of Engineering PhysicsChengdu 610200China Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shanghai Jiao Tong UniversityShanghai 200240China Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan UniversityKunming 650000China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy ConversionDepartment of Materials Science and EngineeringSynergetic Innovation Center of Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei 230026China

As one of the important components of high-effi-ciency perovskite/silicon series devices,wide-bandgap(WBG)perovskite solar cells(PSCs)have been suffering from serious carrier transport barriers and huge open-circuit voltage deficit de-rived from non-radiative recombination,especial-ly at the buried interface that are often ***,we combined cationic and anion passiva-tion strategies via ammonium tetra-n-butyl tetrafluoroborate(TBABF_(4))pre-treating the buried *** calculation predicts that the tetrabutylammonium(TBA^(+))organic cations and(tetrafluoroborate)BF_(4)^(−)anions can easily interact with charged interfacial *** further confirm the enhance-ment of carrier transport performance and decrease in defect density upon TBABF4 ***,a power conversion efficiency of 21.35%with an ultrahigh filling factor of 84.12%is obtained for 1.68 eV-WBG inverted *** addition,the device with TBABF4 pre-treatment demonstrates excellent shelf,thermal,and operational stability.

关键词： Wide-bandgap Buried interface Carrier transport Stablility Defect passiva-tion

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MHDO-MAGE based Performance Optimization Strategy for Steam Generator Level control System of Nuclear Power Plant

MHDO-MAGE based Performance Optimization Strategy for Steam ...

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Chinese Automation Congress (CAC)

作者： Jinguang Shi Xiangsong Kong Xiaoyu Li Zean Yang Weiming Chen School of Electrical Engineering and Automation Xiamen University of Technology Xiamen China State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou China

ISBN: (数字)9798350368604

ISBN: (纸本)9798350368611

The steam generator level control system is one of the critical control systems in a nuclear power plant, and its performance is vital for the safe and stable operation of the plant. The control parameters are key factors that affect the operational performance of the steam generator level control system. Therefore, during the commissioning of the nuclear power plant, it is usually necessary to adjust the parameters through the trial-and-error method. This tuning process mainly relies on the experience of the commissioning personnel and may potentially compromise plant safety due to human errors. Considering that the parameter tuning process of control systems can be regarded as a special type of batch processes, this paper proposes to apply an efficient data-driven optimization method, multi-source hybrid data-driven optimization method based on model accuracy gradient estimation (MHDO-MAGE), to the problem of parameter tuning for the steam generator control system. This method effectively combines the advantages of traditional MBO (Model-Based Optimization) and MFO (Model-Free Optimization) methods, while efficiently utilizing prior data information related to the optimization problem. This method was implemented on a widely adopted steam generator control system model specifically designed for steam generator simulations. The simulation results clearly indicate that the MHDO-MAGE method significantly enhances the efficiency of parameter tuning for the steam generator level control system, ultimately leading to a reduction in the costs associated with nuclear power plant commissioning.

关键词： Accuracy Simulation Optimization methods Estimation control systems Generators Data models Level control Tuning Power generation

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