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SiO_2@C hollow sphere anodes for lithium-ion batteries

Journal of Materials Science & technology 2017年第3期33卷 239-245页

作者： Xuelian Liu Yuxi Chen Hongbo Liu Zhi-Quan Liu College of Materials Science and Engineering/Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

As anode materials for lithium-ion batteries, SiO2 is of great interest because of its high capacity, low cost and environmental affinity. A facile approach has been developed to fabricate SiO2@C hollow spheres by hydrolysis of tetraethyl orthosilicate（TEOS） to form SiO2 shells on organic sphere templates followed by calcinations in air to remove the templates, and then the SiO2 shells are covered by carbon *** microscopy investigations confirm hollow structure of the SiO2@C. The SiO2@C hollow spheres with different SiO2 contents display gradual increase in specific capacity with discharge/charge cycling,among which the SiO2@C with SiO2 content of 67 wt% exhibits discharge/charge capacities of 653.4/649.6 mAh g^（-1） over 160 cycles at current density of 0.11 mA cm^（-2）. The impedance fitting of the electrochemical impedance spectroscopy shows that the SiO2@C with SiO2 content of 67 wt% has the lowest charge transfer resistance, which indicates that the SiO2@C hollow spheres is promising anode candidate for lithium-ion batteries.

关键词： Silica Hollow spheres Carbon coating Anode Lithium-ion batteries

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Adaptive debiasing learning for drug repositioning

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Journal of Biomedical Informatics 2025年 167卷 104843页

作者： Meng, Yajie Wang, Yi Hu, Xinrong Lu, Changcheng Tang, Xianfang Cui, Feifei Zeng, Pan Yao, Yuhua Yang, Jialiang Xu, Junlin School of Computer Science and Artificial Intelligence Wuhan Textile University Hubei Wuhan430200 China College of Computer Science and Electronic Engineering Hunan University Hunan Changsha401331 China School of Computer Science and Technology Hainan University Hainan Haikou570228 China College of Computer and Information Science Chongqing Normal University Chongqing Chongqing401331 China School of Mathematics and Statistics Hainan Normal University Hainan Haikou570100 China Key Laboratory of Data Science and Intelligence Education Ministry of Education Hainan Normal University Hainan Haikou China Key Laboratory of Computational Science and Application of Hainan Province Hainan Normal University Hainan Haikou China Geneis Beijing Co. Ltd Beijing Beijing100102 China School of Computer Science and Technology Wuhan University of Science and Technology Hubei Wuhan430065 China

Drug repositioning, pivotal in current pharmaceutical development, aims to find new uses for existing drugs, offering an efficient and cost-effective path to drug discovery. In recent years, graph neural network-based deep learning methods have achieved significant success in drug repositioning tasks. However, few studies have analyzed the characteristics of datasets to mitigate potential data biases. In this paper, we analyzed three commonly used drug repositioning datasets and identified a consistent characteristic among them: a trend of node polarization, characterized by the presence of popular entities (those commonly occurring and extensively associated) and long-tail entities (those appearing less frequently with fewer associations). Based on this finding, we propose a deep learning framework with a debiasing mechanism, called DRDM. The framework excels in addressing popular entities’ biases, which often overshadow the subtle patterns in long-tail entities—key for novel insights. DRDM dynamically adjusts association weights during training, enhancing long-tail entity representation and reducing bias. In addition, we employ dual-view contrastive learning to provide rich supervisory signals, thereby further enhancing the model's robustness. We conducted experiments with our method on these three datasets, and the results demonstrated that our approach exhibits strong competitiveness compared to competing models. Case studies further highlighted the potential of the model in practical applications, which could provide new insights for future drug discovery. © 2025

关键词： Contrastive Learning

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The aptamers generated from HepG2 cells

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Science China Chemistry 2017年第6期60卷 786-792页

作者： Rongrong Huang Zhongsi Chen Mei Liu Yan Deng Song Li Nongyue He State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Economical Forest Cultivation and Utilization of 2011 Collaborative Innovation Center in Hunan Province Hunan Key Laboratory of Green Chemistry and Application of Biological Nanotechnology Hunan University of Technology

Liver cancer, as the second cause of cancer death all around the world, resulted in a series of chronic liver diseases. More than 80%of the patients cannot receive effective treatment because of their advanced disease or poor liver function. It is time to improve early clinical diagnosis and find optimal therapeutic treatments. As the tumor cells behave differently from the cell-surface molecules, it is necessary to find a highly specific probe. The aptamers, known as "chemical antibodies", can bind to their target molecules with high affinity and high specificity. The apatmers were obtained by Cell-SELEX, which was aimed at finding the aptamers against whole living cells. In the article, after 19 selections, the ssDNA pool was cloned and sequenced. After that, six aptamers were obtained, named apt_A to apt_F. By incubating the aptamers with different cells, except apt_E, the other aptamers showed high specificity. As for apt_E, which showed high affinity to several cancer cells, was a potential probe for the common protein presented by several different cancer cells. The equilibrium dissociation constants(Kd) were evaluated by measuring the flow cytometry signal that characterized the binding ability of aptamers to the target cells at a series of concentrations ranging from 46.3(4.5) nM to 199.4(44.2) nM, which exposed the high binding affinities of these aptamers. The research in the confocal fluorescence images further confirmed the specificity of these aptamers and the fact that the aptamers were combined with the targets on the cell-surface.

关键词： aptamers Cell-SELEX HepG2 cells

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Size-tunable synthesis of gold nanorods using pyrogallol as a reducing agent

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Science China Chemistry 2015年第11期58卷 1759-1765页

作者： Yuanfu Huang Kai Xia Nongyue He Zhuoxuan Lu Liming Zhang Yan Deng Libo Nie Economical Forest Cultivation and Utilization of 2011 Collaborative Innovation Center in Hunan Province Hunan Key Laboratory of Green Packaging and Application of Biological Nanotechnology Hunan University of Technology State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University

A novel and facile seed-mediated method for the preparation of monodispersed gold nanorods(GNRs) is presented by introducing pyrogallol as a reductant. Fast Fourier transformation of high-resolution transmission electron microscopy reveals that the synthesized GNRs are single crystalline. The longitudinal surface plasmon resonance of GNRs can be finely tuned by varying silver ion concentrations or seed amounts. Also, both thick(diameter >30 nm) and thin(diameter <10 nm) GNRs with exceptional monodispersity can be well prepared by this method. These findings indicate that this method has a greater performance in controlling the morphology of GNRs than that of traditional approach with ascorbic acid as a reductant.

关键词： gold nanorods seed-mediated pyrogallol size tunability

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Security-aware Signal Packing Algorithm for CAN-based Automotive Cyber-physical Systems

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IEEE/CAA Journal of Automatica Sinica 2015年第4期2卷 422-430页

作者： Yong Xie Liangjiao Liu Renfa Li Jianqiang Hu Yong Han Xin Peng Key Laboratory for Application Technology of Internet of Things of Fujian Educational Bureau Xiamen University of Technology Key Laboratory of Embedded and Networking Computing of Hunan Province Hunan University Key Laboratory on Complex Systems Optimization & Controlling of Hunan High Education Institutions Hunan Institute of Science and Technology

Network and software integration pose severe challenges in cyber-security for controller area network (CAN)-based automotive cyber-physical system (ACPS), therefore we employ message authentication code (MAC) to defend CAN against masquerade attack, but the consequent bandwidth overhead makes it a necessity to find the tradeoff among security, real-time and bandwidth utilization for signal packing problem (SPP) of CAN. A mixed-security signal model is firstly proposed to formally describe the properties and requirements on security and real-time for signals, and then a mixed-integer linear programming (MILP) formulation of SPP security-aware signal packing (SASP) is implemented to solve the tradeoff problem, where the bandwidth utilization is improved and the requirements in both security and real-time are met. Experiments based on both society of automotive engineers (SAE) standard signal set and simulated signal set showed the effectiveness of SASP by comparing with the state-of-the-art algorithm. © 2014 Chinese Association of Automation.

关键词： Algorithms Bandwidth Communication channels (information theory) Control system synthesis Embedded systems Integer programming

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Corrigendum to “Fatigue behavior of textile reinforced concrete with different textile types and short steel fiber contents” [Constr. Build. Mater 2024 (443) 137692]

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Construction and Building Materials 2025年 458卷

作者： Deju Zhu Haosen Liu Md Zillur Rahman Hao Tang Shuaicheng Guo Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil Engineering Hunan University Changsha 410082 China Department of Mechanical Engineering Ahsanullah University of Science and Technology Dhaka 1208 Bangladesh

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Non-conjugated polymers as thickness-insensitive electron transport materials in high-performance inverted organic solar cells

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Journal of Energy Chemistry 2020年第8期29卷 196-202,I0007页

作者： Zhiquan Zhang Zheling Zhang Yufu Yu Bin Zhao Sheng Li Jian Zhang Songting Tan Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtan 411105HunanChina College of Material Science&Engineering Guangxi Key Laboratory of Information MaterialsGuilin University of Electrical TechnologyGuilin 541004GuangxiChina Hunan Research Institute of Light Industry Changsha 410015HunanChina

Two non-conjugated polymers PEIE-DBO and PEIE-DCO, prepared by quaternization of polyethyleneimine ethoxylate by 1,8-dibromooctane and 1,8-dichlorooctane respectively, are developed as electron transport layer(ETL) in high-performance inverted organic solar cells(OSCs), and the effects of halide ions on polymeric photoelectric performance are fully investigated. PEIE-DBO possesses higher electron mobility(3.68×10-4 cm2 V-1s-1), higher conductivity and more efficient exciton dissociation and electron extraction, attributed to its lower work function(3.94 eV) than that of PEIE-DCO, which results in better photovoltaic performance in OSCs. The inverted OSCs with PTB7-Th: PC71BM as photoactive layer and PEIE-DBO as ETL exhibit higher PCE of 10.52%, 9.45% and 9.09% at the thickness of 9, 35 and 50 nm,respectively. To our knowledge, PEIE-DBO possesses the best thickness-insensitive performance in polymeric ETLs of inverted fullerene-based OSCs. Furthermore, PEIE-DBO was used to fabricate the inverted non-fullerene OSCs(PM6:Y6) and obtained a high PCE of 15.74%, which indicates that PEIE-DBO is effective both in fullerene-based OSCs and fullerene-free OSCs.

关键词： Organic solar cells Electron transport materials Thickness-insensitive Non-conjugated polymer

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Optimized Combinatorial Properties of an AlMgSi(Cu) Alloy Achieved by a Mechanical-Thermal Combinatorial Process

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Acta Metallurgica Sinica(English Letters) 2020年第5期33卷 751-758页

作者： Li-Mei Liu Yu-Xiang Lai Chun-Hui Liu Jiang-Hua Chen Center for High-Resolution Electron Microscopy College of Materials Science&EngineeringHunan UniversityChangsha 410082China Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan UniversityChangsha 410082China

Enhancing combinatorial properties,such as excellent corrosion resistance,high strength and good ductility combined,is an important issue for manufacturing high-quality AlMgSi(Cu)***,we show that this can be achieved by optimizing a combinatorial process consisting of pre-ageing,cold-rolling and post-ageing to tailor the hierarchical microstructures of the *** electron microscopy analysis reveals that the enhanced combinatorial properties of corrosion resistance,strength and ductility are owing to modification of grain boundary microstructure in good association with changes of precipitate microstructures and a more homogenous distribution of solute atoms,as compared with the microstructures of the alloy processed by thermal ageing only.

关键词： Al alloy Corrosion resistance Mechanical property Ageing Deformation

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A universal strategy for achieving dual cross-linked networks to obtain ultralong polymeric room temperature phosphorescence

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Science China Chemistry 2023年第4期66卷 1161-1168页

作者： Yifan Niu Yan Guan Chunye Long Chaofan Ren Jiwen Lu Chanjuan Jin Ping Wang Xinghe Fan He-Lou Xie Key Laboratory of Environment-friendly Chemistry and Application of Ministry of Education Key Laboratory of Polymeric Materials and Application Technology of Hunan Province and Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan ProvinceCollege of ChemistryXiangtan UniversityXiangtan 411105China Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Efficient polymeric room-temperature phosphorescence(PRTP)with excellent processability and flexibility is highly desirable but still faces formidable ***,a general strategy is developed for efficient PRTP through photo-polymerization of phosphor monomers and N-isopropylacrylamide(NIPAM)spontaneously without a *** ultralong lifetime of 3.54 s with afterglow duration time of 25 s and decent phosphorescent quantum efficiency of 13%are *** efficient PRTP has been demonstrated to be derived from the synergistic effect of the covalent and hydrogen bonds networks formed through photo-polymerization of *** electron paramagnetic resonance(EPR)spectra confirmed that methyl radicals are generated under the irradiation of ultraviolet light and promote the formation of covalent cross-linking *** strategy has also been proved to be generalizable to several other phosphor ***,the polymer films display ultrahigh temperature resistance with long afterglows even at 140℃ and unexampled ultralong lifetime of 2.45 s in aqueous *** work provides a simple and feasible avenue to obtain efficient PRTP.

关键词： universal strategy ultralong polymeric room temperature phosphorescence dual cross-linked networks photopolymerization crosslinker

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Acoustic emission assessment of interface cracking in thermal barrier coatings

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Acta Mechanica Sinica 2016年第2期32卷 342-348页

作者： Li Yang Zhi-Chun Zhong Yi-Chun Zhou Wang Zhu Zhi-Biao Zhang Can-Ying Cai Chun-Sheng Lu Key Laboratory of Key Film Materials & Application for Equipment (Hunan Province) School of Materials Science and EngineeringXiangtan University Key Laboratory of Low Dimensional Materials & Application Technology (Ministry of Education) School of Materials Science and EngineeringXiangtan University Department of Mechanical Engineering Curtin University

In this paper,acoustic emission（AE） and digital image correlation methods were applied to monitor interface cracking in thermal barrier coatings under *** interface failure process can be identifie via its AE features,including buckling,delamination incubation and *** to the Fourier transformation of AE signals,there arefourdifferentfailuremodes：surfaceverticalcracks,opening and sliding interface cracks,and substrate *** characteristic frequency of AE signals from surface vertical cracks is 0.21 MHz,whilst that of the two types of interface cracks are 0.43 and 0.29 MHz,*** energy released of the two types of interface cracks are 0.43 and 0.29 MHz,*** on the energy released from cracking and the AE signals,a relationship is established between the interface crack length and AE parameters,which is in good agreement with experimental results.

关键词： Thermal barrier coatings Acoustic emission Interface cracking Crack type Quantitative analysis

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