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Enhanced cyclic stability of partially disordered spinel cathodes through direct fluorination with gaseous fluorine

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Rare Metals 2024年第4期43卷 1635-1646页

作者： Yong-Nian Ma Ling-chen Kong Shao-Shan chen Yong Wang Li-Dong Sun cong Peng Meng-Meng Qin Yu Li Wei Feng Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin300072China Institute of Advanced Technology and Equipment Beijing University of Chemical TechnologyBeijing100029China

Spinel-type cathodes are considered an optimal substitute for conventional layered oxide cathodes owing to their use of inexpensive and earth-abundant manganese as the redox-active ***,the introduction of cation disorder can effectively suppress the detrimental two-phase reaction to realize high capacities in a wide voltage ***,the continuous capacity decay during cycles has hindered the widespread application of these cathode *** fluorides exhibit excellent electrochemical stability at high voltage;therefore,in this study,the direct F2 gas reaction with a partially disordered spinel cathode(Li_(1.6)Mn_(1.6)O_(3.7)F_(0.3,)LMOF1.6)was initially applied to investigate the impacts of fluorination on the surface structure and electrochemical *** inorganic fluorinated layer,mainly containing LiF,was distributed uniformly on the surface of LMOF1.6nanoparticles after fluorination for an appropriate time without the turbulence caused by the valency of manganese cation,which improved the capacity retention and rate capability by the suppression of structural damage,parasitic reaction,and cation *** LMOF1.6cathode fluorinated for 0.5 h exhibited a capacity of283.6 mAh·g^(-1)at 50 mA·g^(-1)and an enhanced capacity retention of 29.6%after 50 cycles in the voltage range of1.5-4.8 V,as compared to the pristine LMOF1.6 with only27.9%capacity retention.

关键词： Spinel-type cathodes Direct fluorination Capacity retention ability High rate capability

Total process of fault diagnosis for wind turbine gearbox,from the perspective of combination with feature extraction and machine learning:A review

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Energy and AI 2024年第1期15卷 356-373页

作者： Xinhua Xu Xinyu Huang Haibin Bian Jiani Wu chen Liang Feiyun cong Huadian(Ningxia)Energy Co.Ltd.New Energy Branch No.55Xihu StreetNingchuan 750016China State Key Laboratory of Fluid Power&Mechatronic System Zhejiang UniversityZhejiangHangzhou 310027China Huadian Zhengzhou Machinery Design&Research Institute Co.Ltd. No.28Huxinhuandao RdZhengzhou 450046China

With the increasing of the installed capacity of wind power,the condition monitoring and maintains technique is becoming more *** Turbines(WT)gearbox is one of the key wind power components as it plays the role of power transmission and speed *** this,a number of scholars have pay attention to the fault diagnosis of WT *** efficiency of Machine Learning(ML)algorithms is highly correlated with signal type,data quality,and extracted features *** implementation of ML techniques has proven to be advantageous in simplifying the comprehension prerequisites for fault diagnosis technology concerning fault *** and more current studies predominantly concentrate on the utilization and fine-tuning of ML algorithms,while providing limited insights into the features of the acquired ***,it is necessary to review the research in recent years from the perspective of the combination of feature extraction and ML algorithms,and provide a detailed direction for future WT gearbox fault diagnosis technology *** this paper,data processing algorithms and typical fault diagnosis methods based on ML methods for WT gearbox are *** the using of ML method in WT gearbox fault diagnosis,the data prepared for training is very *** paper firstly reviewed the data analysing method which will support the ML *** data analysing methods include data acquisition,data preprocessing and feature extraction *** extraction plays a pivotal role in the realm of gearbox fault diagnosis,as it serves as the essence of effective *** review will primarily focus on exploring methods that enable the utilization of efficient features in combination with ML techniques to achieve accurate gearbox fault *** typical ML method for WT gearbox fault diagnosis are carefully ***,some prospects for future research directions are discussed in the end.

关键词： Wind turbine gearbox Machine learning Fault diagnosis Artificial neural network

Study on sex differences and potential clinical value of threedimensional computerized tomography pelvimetry in rectal cancer patients

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 773-786页

作者： Xiao-cong Zhou Fei-Yue Ke Gaurav Dhamija Hao chen Qiang Wang Department of Colorectal Surgery The Dingli Clinical Institute of Wenzhou Medical University(Wenzhou Central Hospital)Wenzhou 325000Zhejiang ProvinceChina Postgraduate Training Base Alliance of Wenzhou Medical University Wenzhou Central HospitalWenzhou 325000Zhejiang ProvinceChina School of International Studies Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina Department of Radiology The Dingli Clinical Institute of Wenzhou Medical University(Wenzhou Central Hospital)Wenzhou 325000Zhejiang ProvinceChina

BACKGROUND Laparoscopic rectal cancer radical surgery is a complex procedure affected by various ***,the existing literature lacks standardized parameters for the pelvic region and soft tissues,which hampers the establishment of consistent *** To comprehensively assess 16 pelvic and 7 soft tissue parameters through computerized tomography(CT)-based three-dimensional(3D)reconstruction,providing a strong theoretical basis to address challenges in laparoscopic rectal cancer radical *** We analyzed data from 218 patients who underwent radical laparoscopic surgery for rectal cancer,and utilized CT data for 3D pelvic *** anatomical points were carefully marked and measured using advanced 3D modeling *** analyze the pelvic and soft tissue parameters,we emp-loyed statistical methods including paired sample t-tests,Wilcoxon rank-sum tests,and correlation *** The investigation highlighted significant sex disparities in 14 pelvic bone parameters and 3 soft tissue *** demonstrated larger measurements in pelvic depth and overall curvature,smaller measurements in pelvic width,a larger mesorectal fat area,and a larger anterior-posterior abdominal *** contrast,females exhibited wider pelvises,shallower depth,smaller overall curvature,and an increased amount of subcutaneous fat ***,there were no significant sex differences observed in certain parameters such as sacral curvature height,superior pubococcygeal diameter,rectal area,visceral fat area,waist circumference,and transverse abdominal *** The reconstruction of 3D CT data enabled accurate pelvic measurements,revealing significant sex differences in both pelvic and soft tissue *** study design offer potential in predicting surgical difficulties and creating personalized surgical plans for male rectal cancer patients with a potentially“difficult pelvis”,ultimately improving surgical ***

关键词： Computerized tomography Rectal cancer Three-dimensional reconstruction Pelvimetry Sex differences

Detection of ribophagy in yeast and mammals

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Biophysics Reports 2024年第2期10卷 82-101页

作者： Miao Ye Yuting chen Zhaojie Liu Yigang Wang cong Yi Xinyuan Institute of Medicine and Biotechnology School of Life Sciences and Medicine Zhejiang Sci-Tech University Department of Biochemistry and Department of Hepatobiliary and Pancreatic Surgery of the First Affiliated Hospital Zhejiang University School of Medicine Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation Affiliated Cancer Hospital & Institute of Guangzhou Medical University School of Basic Medical Sciences Guangzhou Medical University

Ribophagy, the cellular process wherein ribosomes are selectively self-digested through autophagy,plays a pivotal role in maintaining ribosome turnover. Understanding the molecular regulatory mechanisms governing ribophagy is pivotal to uncover its significance. Consequently, the establishment of methods for detecting ribophagy becomes important. In this protocol, we have optimized, enriched,and advanced existing ribophagy detection techniques, including immunoblotting, fluorescence microscopy, and transmission electron microscopy(TEM), to precisely monitor and quantify ribophagic events. Particularly noteworthy is the introduction of TEM technology for yeast ribophagy detection. In summary, the delineated methods are applicable for detecting ribophagy in both yeast and mammals,laying a solid foundation for further exploring the physiological importance of ribophagy and its potential implications in diverse cellular environments.

关键词： Ribophagy Ribosome turnover Immunoblotting Fluorescence microscopy Transmission electron microscopy Yeast and mammals

Unprecedented Hexagonal Bipyramidal Single-Ion Magnets Based on Metallacrowns

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Unprecedented Hexagonal Bipyramidal Single-Ion Magnets Based...

A vector sum analysis method for stability evolution of expansive soil slope considering shear zone damage softening

中国化学会第七届全国结构化学学术会议

作者： Quan-Wen Li yan-cong chen Jun-Liang Liu Ming-Liang Tong MOE Key Lab of Bioinorganic and Synthetic Chemistry School of Chemistry Sun Yat-Sen University

＜正＞Single-molecule magnets（SMMs）,which exhibit future applications in quantum processing and storage materials,have attracted considerable interests since their discovery in *** has been recognized that crystal-field（CF）possessing a high rotation symmetry or specific symmetry is apt to enhance the axial anisotropy and minimize the quantum tunnelling of magnetization（QTM）,

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3746-3759页

作者： Junbiao yan Lingwei Kong cheng chen Mingwei Guo State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China

Slope stability analysis is a classical mechanical problem in geotechnical engineering and engineering *** is of great significance to study the stability evolution of expansive soil slopes for engineering construction in expansive soil *** of the existing studies evaluate the slope stability by analyzing the limit equilibrium state of the slope,and the analysis method for the stability evolution considering the damage softening of the shear zone is *** this study,the large deformation shear mechanical behavior of expansive soil was investigated by ring shear *** damage softening characteristic of expansive soil in the shear zone was analyzed,and a shear damage model reflecting the damage softening behavior of expansive soil was derived based on the damage ***,by skillfully combining the vector sum method and the shear damage model,an analysis method for the stability evolution of the expansive soil slope considering the shear zone damage softening was *** results show that the shear zone subjected to large displacement shear deformation exhibits an obvious damage softening *** damage variable equation based on the logistic function can be well used to describe the shear damage characteristics of expansive soil,and the proposed shear damage model is in good agreement with the ring shear test *** vector sum method considering the damage softening behavior of the shear zone can be well applied to analyze the stability evolution characteristics of the expansive soil *** stability factor of the expansive soil slope decreases with the increase of shear displacement,showing an obvious progressive failure behavior.

关键词： Expansive soil slope Stability analysis Ring shear test Vector sum method Damage model Strain softening

A comprehensive magnetic study of a family of pillar-layered frameworks with analogous Kagomé layers

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A comprehensive magnetic study of a family of pillar-layered...

Numerical Investigation of the Angle of Attack Effect on Cloud Cavitation Flow around a Clark-Y Hydrofoil

中国化学会第九届全国无机化学学术会议

作者： Long-Fei Wang Cui-Jin Li yan-cong chen Ming-Liang Tong School of Chemistry & Chemical Engineering Sun Yat-Sen University College of Chemistry and Chemical Engineering Zhongkai University of Agriculture and Engineering

Based on the analogous kagomé[Co3（imda）2]layers,a family of pillar-layered frameworks with the formula of[Co3（imda）2（pillar）3]·（pillar）n·x H2O have been successfully synthesized by hydrothermal/solvothermal method（imda=imidazole-4,5-dicarboxylate;for 1,pillar=pyz=pyrazine,n=0,x=8;for 2,pillar=4,4-bpy=4,4-bipyridine,n=1,x=8;for 3,pillar=1,4-dpb=1,4-di（pyridin-4-yl）benzene,n=1,x=13;for 4,pillar=4,4’-dpbp=4,4’-di（pyridin-4-yl）-1,1’-biphenyl,n=1,x=14）.Single crystal structral analysis shows an significant increase of the interlayer distances synchronized with the extention of the pillar ligands,namely 7.092（3）（1）,10.921（6）（2）,14.780（5）（3）and 19.165（4）（4）.Despite the wrinkled kagomélayers in complexes 2-4,the comprehensive magnetic characterizations revealed the weaken of interlayer magnetic interactions and the increase of degree of frustration from 1 to 4,which lead to the characteristic magnetic ground states.[1,2]

关键词： Spin frustration Kagomé lattice pillar-layered framework magnetism

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2947-2964页

作者： Di Peng Guoqing chen Jiale yan Shiping Wang College of Engineering Peking UniversityBeijing100871China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China

Cavitation is a prevalent phenomenon within the domain of ship and ocean engineering,predominantly occurring in the tail flow fields of high-speed rotating propellers and on the surfaces of high-speed underwater *** re-entrant jet and compression wave resulting from the collapse of cavity vapour are pivotal factors contributing to cavity ***,these phenomena significantly modulate the evolution of cavitation *** this paper,numerical investigations into cloud cavitation over a Clark-Y hydrofoil were conducted,utilizing the Large Eddy Simulation(LES)turbulence model and the Volume of Fluid(VOF)method within the OpenFOAM *** analysis of results obtained at different angles of attack is undertaken.A discernible augmentation in cavity thickness is observed concomitant with the escalation in attack angle,alongside a progressive intensification in pressure at the leading edge of the hydrofoil,contributing to the suction *** results can serve as a fundamental point of reference for gaining a deeper comprehension of cloud cavitation dynamics.

关键词： Cloud cavitation re-entrant jet compression wave clark-Y hydrofoil

Friction between a single platelet and fibrinogen

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Friction 2024年第10期12卷 2344-2354页

作者： Yuhe WANG yan LI Shuguang ZHANG Haosheng chen Yongjian LI State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Key Laboratory of Agricultural Information Acquisition Technology Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing 100083China

Friction has been considered to mediate physiological activities of cells,however,the biological friction between a single cell and its ligand-bound surface has not been thoroughly ***,we established a friction model for single cells based on an atomic force microscopy(AFM)combined with an inverted fluorescence microscopy(IFM)to study the friction between a highly sensitive platelet and fibrinogen-coated *** study revealed that the friction between the platelet and fibrinogen-coated tip is mainly influenced by specific ligand–receptor ***,we modeled the biological friction,which consists of specific interaction,non-specific interaction,and mechanical ***,the results suggested that the velocity can also affect specific ligand–receptor interactions,resulting in the friction change and platelet adhesion to fibrinogen *** study built a friction model between a single cell and its ligand-bound surface and provided a potential method to study the biological friction by the combination of AFM and IFM.

关键词： friction single cell platelet fibrinogen atomic force microscopy(AFM)