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Review on modification routes for SnO_(x)-based anodes for li storage:morphological structure tuning and phase structure design

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Rare Metals 2023年第9期42卷 2840-2867页

作者： yu Zheng Xue-Xia lan xing-yu Xiong Bin yuan Ren-Zong Hu School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou510640China

Fascinating with high specific capacity and moderate lithiation potential,SnO_(x)-based materials have been intensively investigated as one of the most promising anodes for lithium-ion ***,due to poor cycling stability,sluggish reaction kinetics,and limited electrochemical reaction reversibility,the development of SnO_(x)-based anodes has been *** the current preparation and modification routes for SnO_(x)-based anodes lack direct and specific ***,modification routes for SnO_(x)-based anodes have been ***,to provide more direct instructions,the tuning routes of morphological structure for SnO_(x)-based electrodes(including slurry-based and self-supported)have been thoroughly discussed from the preparation ***,according to the properties of SnO_(x)-based anodes,the phase structure design ideas have also been properly classified and organized for addressing chemical reaction kinetics or thermodynamic ***,for future-oriented studies,new insights into the development and commercialization prospects of SnO_(x)-based anodes are also *** review,with comprehensive information on SnO_(x)-based anodes,aims to bring more specific guidance and valuable inspiration for peer researchers who are promoting the application of SnO_(x)-based materials for energy conversion and storage devices.

关键词： lithium-ion battery(lIB) SnO_(x)-based anodes Reaction kinetics Morphological structure tuning Phase structure design

Hydrodynamic Response of A Fully Coupled TlP Hull-TTR System with Detailed Modeling of A Hydraulic Pneumatic Tensioner and Riser Joints

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China Ocean Engineering 2022年第3期36卷 451-463页

作者： HAO Shuai yu Yang yu Jian-xing yuAN Zhi-ming Xu li-xin Maritime College Tianjin University of TechnologyTianjin 300384China State Key laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Tianjin Key laboratory of Port and Ocean Engineering Tianjin UniversityTianjin 300072China Department of Naval Architecture Ocean&Marine EngineeringUniversity of StrathclydeGlasgow G40LZUK

Tension leg Platform(TlP)in deepwater oil and gas field development usually consists of a hull,tendons,and top tension risers(TTRs).To maintain its top tension,each TTR is connected with a tensioner system to the *** to the complicated configuration of the tensioners,the hull and TTRs form a strong coupled ***,some simplified tensioner models are applied to analyze the TlP *** is a large discrepancy between their analysis results and the actual mechanism behaviors of a *** is very necessary to develop a more detailed tensioner model to consider the coupling effects between TlP and *** the present study,a fully coupled TlP hull-TTR system for hydrodynamic numerical simulation is established.A specific hydraulic pneumatic tensioner is modeled by considering 4 *** production TTR model is stacked up by specific riser *** simulation is also extended to analyze an array of *** regular and irregular waves are *** behaviors of different cylinders are *** results show that it is important to consider the specific configurations of the tensioner and TTRs,which may lead to obviously different response behaviors,compared with those from a simplified model.

关键词： top tension riser(TTR) fully coupled hull-tendon-TTR-tensioner model hydraulic pneumatic tensioner hydrodynamic response 3D potential flow theory

DFT Cal.ulations for Electron Transfer Bond-breakingReaction of CH_3-X

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Chinese Chemical letters 2001年第4期12卷 347-350页

作者： yu Mei xing Zheng yu ZHOu Ben Ni Du Department of Chemistry Qufu Normal UniversityShandong Qufu 273165 Department of Chemistry Nankai UniversityTianjin 300071 State Key laboratory of Crystal Materials Shandong UniversityShandongJinan 250100

DFT/6-311 + g** level cal.ulations are performed tp study the electron transfer bond-breaking reaction of CH3-X. The cal.ulated values are in good agreement with the experimental results or the empirical model. Through analyzing the change of the energy and the charge densilty along hte reaction path, the bond-breaking in ET reaction for CH3X is investigated.

关键词： electron transfer bond-breaking reaction density functional theory (DFT) CH_(3)X

High-brightness near-infrared luminescent bioprobes based on lanthanide-doped Na3CrF6 nanoparticles

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Science China Materials 2024年第12期67卷 4113-4114页

作者： yun xing Shiqi yu Datao Tu Xueyuan Chen State Key laboratory of Structural Chemistry Fujian Key Laboratory of Nanomaterialsand CAS Key Laboratory of Design and Assembly of Functional NanostructuresFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation laboratory for Optoelectronic Information of China Fuzhou 350108China university of Chinese Academy of Sciences Beijing 100049China

Over the past decade,near-infrared(NIR)luminescent materials have emerged as a frontier in photonics and material science,finding diverse applications in bioimaging,encryption,and photodetection[1].Particularly,NIR nanoprobes are widely utilized in life science and clinical medicine because of their high spatial resolution,deep tissue penetration,low optical absorption and scattering,and minimal autofluorescence[2,3].

关键词： nanoparticles frontier utilized

Effect of cerium on abrasive wear behaviour of hardfacing alloy

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Journal of Rare Earths 2012年第1期30卷 69-73页

作者： xing Shule yu Shengfu DENG yu DAI Minghui yu lu State Key laboratory of Material Forming and Mould&Die Designing Huazhong University of Science and TechnologyWuhan 430074China

Hardfacing alloys with different amounts of ceria were prepared by self-shielded flux cored arc *** abrasion tests were carried out using the dry sand-rubber wheel machine according to JB/T 7705-1995 *** hardness of hardfacing deposits was meas-ured by means of HR-150Al Rockwell hardness test and the fracture toughness was measured by the indentation *** characterization and surface analysis were made using optical microscopy,scanning electron microscopy（SEM） and energy spectrum *** results showed that the wear resistance was determined by the size and distribution of the carbides,as well as by the matrix *** main wear mechanisms observed at the surfaces included micro-cutting and micro-pl.ughing of the *** addition of ceria improved the hardness and fracture toughness of hardfacing deposits,which would increase the resistance to plastic deformation and scratch,thus the wear resistance of hardfacing alloys was improved.

关键词： abrasive wear carbides rare earth oxides

Equi-invariability,bounded invariance complexity and l-stability for control systems

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Science China Mathematics 2021年第10期64卷 2275-2294页

作者： xing-fu Zhong Zhi-jing Chen yu Huang School of Mathematics and Statistics Guangdong University of Foreign StudiesGuangzhou 510006China School of Mathematics and Systems Science Guangdong Polytechnic Normal UniversityGuangzhou 510665China School of Mathematics Sun Yat-sen UniversityGuangzhou 510275China

In this paper,we introduce the notions of bounded invariance complexity,bounded invariance complexity in the mean and mean lyapunov-stability for control *** we characterize these notions by introducing six types of *... 详细信息

关键词： equi-invariability invariance complexity dichotomy theorem control set invariance entropy

Risk Assessment of Multi‑Hazards in Hangzhou:A Socioeconomic and Risk Mapping Approach using the CatBoost‑SHAP Model

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International Journal of Disaster Risk Science 2024年第4期15卷 640-656页

作者： Bofan yu Jiaxing Yan yunan li Huaixue xing The Institute of Geological Survey of China university of Geosciences(Wuhan) China University of Geosciences(Wuhan)Wuhan 430074China China Geological Survey Nanjing CenterNanjing 210016China

As the global push for sustainable urban development progresses, this study, set against the backdrop of Hangzhou City,one of China's megacities, addressed the conflict between urban expansion and the occurrence of urban geological *** on the predominant geological hazards troubling Hangzhou-urban road collapse, land subsidence, and karst collapse-we introduced a Categorical Boosting-SHapley Additive exPlanations(CatBoost-SHAP) model. This model not only demonstrates strong performance in predicting the selected typical.urban hazards, with area under the curve(AuC) values reaching 0.92, 0.92, and 0.94, respectively, but also, through the incorporation of the explainable model SHAP, visually presents the prediction process, the interrelations between evaluation factors, and the weight of each factor. Additionally, the study undertook a multi-hazard evaluation, producing a susceptibility zoning map for multiple hazards, while performing tailored analysis by integrating economic and population density factors of Hangzhou. This research enables urban decision makers to transcend the “black box” limitations of machine learning, facilitating informed decision making through strategic resource allocation and scheduling based on economic and demographic factors of the study area. This approach holds the potential to offer valuable insights for the sustainable development of cities worldwide.

关键词： Hangzhou city Multi-hazard risk assessment Machine learning Machine learning interpretability Socioeconomic analysis urban sustainability development

Texture property and weakening mechanism of Mg-3Al-1Zn alloy by interactive alternating forward extrusion

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Journal of Magnesium and Alloys 2023年第2期11卷 684-693页

作者： Ye Wang Feng li yu Wang xing Mao Xiao School of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150040P R China Key laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080P R China Southwest Technique and Engineering Reasearch Institute Chongqing 400039P R China

The interactive alternating forward extrusion(AFE) method can realize the change of texture type and the weakening of texture *** AZ31 magnesium alloy as an example, the texture evolution of interactive AFE was studied. The results show that all kinds of dynamic recrystallization(DRX) behaviors can weaken the texture to vary degrees. The weakening effect of twinning-induced recrystallization(TDRX)behavior was particularly significant. During the interactive AFE process, the c-axis of most grains rotated under the external force, and tended to be 90° angle with the ED direction, forming a stable fiber texture. In addition, with the increase of loading passes, the starting of {0001} basal slip system became more and more difficult. The(10–10) texture formed by {10–10} prismatic slip system after sixth passes was the main texture type. With the increase of forming temperature, the starting ability of {10–10} prismatic slip systems increased, and the(10–10) texture formed by prismatic slip system above 623 K dominated.

关键词： Magnesium alloy Alternating extrusion Texture Recrystallization Grain orientation

Tunable band structures of polycrystalline graphene by external and mismatch strains

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Acta Mechanica Sinica 2012年第6期28卷 1539-1544页

作者： Jiang-Tao Wu xing-Hua Shi yu-Jie Wei lNM Institute of Mechanics Chinese Academy of Sciences

lacking a band gap largely limits the application of graphene in electronic devices. Previous study shows that grain boundaries （GBs） in polycrystalline graphene can dra- matically alter the electrical properties of graphene. Here, we investigate the band structure of polycrystalline graphene tuned by externally imposed strains and intrinsic mismatch strains at the GB by density functional theory （DFT） cal.u- lations. We found that graphene with symmetrical GBs typ- ically has zero band gap even with large uniaxial and biax- ial strain. However, some particular asymmetrical GBs can open a band gap in graphene and their band structures can be substantially tuned by external strains. A maximum band gap about 0.19 eV was observed in matched-armchair GB （5, 5） I （3, 7） with a misorientation of θ = 13° when the applied uniaxial strain increases to 9%. Although mismatch strain is inevitable in asymmetrical GBs, it has a small influence on the band gap of polycrystalline graphene.

关键词： Graphene Grain boundary Defects Strain and gap