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Journal of Energy Chemistry 2020年第9期29卷 160-168,I0005页

作者： Wen-Feng Ren Jun-Tao li Shao-jian Zhang Ai-ling lin You-hu Chen Zhen-guang Gao yao Zhou li Deng ling huang Shi-Gang Sun State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina College of Energy Xiamen UniversityXiamen 361005FujianChina

Si-based materials have been extensively studied because of their high theoretical capacity,low working potential,and abundant reserves,but serious initial irreversible capacity loss and poor cyclic performance resulting from large volume change of Si during lithiation and delithiation processes restrict their widespread ***,we report the preparation of multi-shell coated Si(DS-Si)nanocomposites by in-situ electroless deposition method using Si granules as the active materials and copper sulfate as Cu *** ratio of Si and Cu was readily tuned by varying the concentration of copper *** multi-shell(Cu@CuxSi/SiO2)coating on Si surface promotes the formation of robust and dense SEI films and the transportation of ***,the obtained DS-Si composites exhibit an initial coulombic efficiency of 86.2%,a capacity of 1636 mAh g^-1 after 100 discharge-charge cycles at 840 mA g^-1,and an average charge capacity of 1493 mAh g^-1 at 4200 mA g^-*** study provides a low-cost and large-scale approach to the preparation of nanostructured Si-metal composites anodes with good electrochemical performance for lithium ion batteries.

关键词： Silicon nanoparticles Multi-shell coating Electroless deposition Anode materials lithium ion batteries

Fabrication of Trans-1,4-polyisoprene Nanofibers by Electrospinning and Its Crystallization Behavior and Mechanism

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Chinese Journal of Polymer Science 2016年第7期34卷 797-804页

作者： hua-feng shao zhi-lu li 贺爱华 chen-guang liu wei yao Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization Key Laboratory of Rubber-Plastics Ministry of Education Qingdao University of Science and Technology Qingdao 266042 China

Trans-1,4-polyisoprene（TPI） nanofibers have been fabricated successfully through electrospinning *** the control of electrospinning parameters, highly crystallized TPI fresh fibers composed mainly of β phase were produced. Morphology and diameter of TPI nanofibers can be controlled by adjusting the electrospinning conditions. The in situ observations of FTIR spectra revealed that the crystallinity of the TPI fibers decreased with aging. While for TPI nanofibers aging at 45 °C for 24 h, a decrease in crystallinity as well as β to a transformation was observed with aging and these changings happened in the first 50 h during aging. The mechanism for β-TPI formation during electrospinning process and the reduced crystallinity with aging were proposed.

关键词： Electrospinning Trans-1 4-polyisoprene Crystallization Transformation βphase

Relationship between crystallographic structure of complex inclusions MgAl_(2)O_(4)/Ti2O_(3)/MnS and improved toughness of heat-affected zone in shipbuilding steel

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Journal of Iron and Steel Research International 2022年第8期29卷 1277-1290页

作者： Yan Wang li-guang Zhu jin-xia huo Qing-jun Zhang yao-guang Wu Wei Chen Shuo-ming Wang College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina College of Materials Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina China Analysis and Testing Center North China University of Science and TechnologyTangshan 063210HebeiChina MCC Capital Engineering&Research Incorporation limited Metallurgical Engineering Consulting and Design DivisionBeijing 100176China

In accordance with the minimum degree of disregistry mechanism in oxide metallurgy, the intragranular acicular ferrite (IAF) generated by microalloying elements in austenite was studied. Herein, the effect of Mg treatment on the microstructure and toughness of the heat-affected zone (HAZ) in shipbuilding steel was investigated. Mg treatment produced inclusions that influenced the formation of acicular ferrite in the microstructure. This refined the HAZ microstructure and improved its toughness. Electron backscatter diffraction was used to determine the oxides of titanium and the MgO Al_(2)O_(3) or MgAl_(2)O_(4) complex inclusions that induced the formation of IAF. MnS precipitated on MgAl_(2)O_(4) on a specific habit plane and in a specific direction. MnS had a specific orientation relationship with MgAl_(2)O_(4), i.e., f100gMgAl_(2)O_(4) //{100}MnS. The 35-mm-thick plate obtained in the industrial test after welding at a welding heat input of 120 kJ/cm had an average impact absorbed energy of 282.7 J at - 40 ℃ and 2 mm from the weld joint in the HAZ. The twodimensional disregistry index between inclusions can be used as the basis for controlling their distribution and adsorption force. Microalloy addition in the order of Al-Mg-Ti is key to obtaining abundant dispersion and fine nucleation in austenite.

关键词： High heat input welding Mg treatment Disregistry mechanism Heat-affected zone

Collaborative filtering recommendation algorithm based on interactive data classification

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The Journal of China Universities of Posts and Telecommunications 2020年第5期27卷 1-12页

作者： ji Yimu li Ke liu Shangdong liu Qiang yao Haichang li Kui School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing University of Posts and TelocommunicutionsNanjing 210003China Institue of High Performance Computing and Bigdata Nanjing University of Posts and TelecommunicationsNanjing 210003China Nanjing Center of HPC China Nanjing University of Posts and TelocommunicutionsNanjing 210003China jiangsu HPC and Intelligent Processing Engineer Research Center Nanjing University of Posts and Telocommunicutions Nanjing 210003China

In the matrix factorization(MF)based collaborative filtering recommendation method,the most critical part is to deal with the interaction between the features of users and *** mainstream approach is to use the inner product for MF to describe the user-item ***,as a shallow model,MF has its limitations in describing the relationship between *** addition,when the size of the data is large,the performance of MF is often poor due to data sparsity and *** paper presents a model called PIDC,short for potential interaction data clustering based deep learning ***,it uses classifiers to filter and cluster recommended items to solve the problem of sparse training ***,it combines MF and multi-layer perceptron(MLP)to optimize the prediction effect,and the limitation of inner product on the model expression ability is *** proposed model PIDC is tested on two *** experimental results show that compared with the existing benchmark algorithm,the model improved the recommendation effect.

关键词： personalized recommendation deep learning clustering collaborative filtering

Characterization of suspended solids and particle-bound heavy metals in a first flush of highway runoff

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第11期9卷 1567-1575页

作者： Fa-hui NIE Tian li Hai-feng yao Man FENG guang-kai ZHANG State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China Institute of Environment Engineering Research East China Jiaotong University Nanchang 330013 China

To investigate the dynamic characteristics of total suspended solids (TSS) and their particle-bound heavy metals in a first flush, the runoff sampling together with its flow rate measuring was conducted for three rainfall events at outfalls of highway in Shanghai from June to September 2007. Field samples were analyzed to determine the concentrations of TSS and particle-bound heavy metals, such as Zn, Pb, and Cu. Results show that the wash off behavior of TSS under varying runoff rate condition can be explained by different antecedent dry weather period (ADWP). Contribution of fine fraction (45 μm). When the runoff flow increased obviously, a significant contribution of the coarse fraction was observed for a certain rainfall events with long antecedent dry weather condition. The changes of total metals concentration and particle-bound metal concentrations were strongly dependent on the TSS variation. TSS was generally well correlated with most particulate-bound heavy metals. Of the heavy metals, the concentration of Zn was found considerably high and that of Pb was significantly low at North Zhongshan 2 Road, in Shanghai, China, but they are still within the range reported in the literature. Fluctuation of heavy metal contents in the coarse fraction during a first flush period was more significant compared with that in the fine fraction. The results will assist in the development of effective control strategies to minimize heavy metals and solids in highway runoff.

关键词： Heavy metals Highway runoff First flush Suspended solids (SS)

Synthesis and Characterization of Novel Acetohydroxyacid Synthase Inhibitors

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Chemical Research in Chinese Universities 2006年第5期22卷 593-597页

作者： GAO Fei-fei li yao-xian ZHANG Suo-qin ZHANG guang-liang College of Chemistry Jilin University Changchun 130021 P. R. China

A novel kind of acetohydroxyacid synthase（AHAS） inhibitors, arylsulfonylaminocarbonyl-2-thiohydantoins, was synthesized based on biorational design. The structures of these compounds were confirmed by IR, MS, NMR, and elemental analysis. The results of the preliminary activity tests indicate that most of the arylsulfonylamidecarbonyl-5- methyl-2-thiohydantoins have a higher biological activity than those without 5-methyl substituent.

关键词： Sulfonylaminocarbonyl-2-thiohydantoin Sulfonylurea Acetohydroxyacid synthase, Herbicidal activity

Gut microbiota alteration and modulation in hepatitis B virus-related fibrosis and complications:Molecular mechanisms and therapeutic inventions

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World Journal of Gastroenterology 2022年第28期28卷 3555-3572页

作者： yao-guang li Zu-jiang Yu Ang li Zhi-Gang Ren Department of Infectious Diseases The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Gene Hospital of Henan Province Precision Medicine CenterThe First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina jinan Microecological Biomedicine Shandong Laboratory Jinan 250000Shandong ProvinceChina

Hepatitis B virus(HBV)has posed a threat to public health,mainly resulting in liver *** long-term accumulation of extracellular matrix,patients with chronic hepatitis B are at high risk of developing into liver fibrosis and cirrhosis and even life-threatening hepatic *** occurrence of complications such as spontaneous bacterial peritonitis and hepatic encephalopathy greatly increases disability and *** deeper understanding of the bidirectional interaction between the liver and the gut(gut-liver axis),there is a growing consensus that the human health closely relates to the gut *** by animal and human studies,the gut microbiota alters as the HBV-related liver fibrosis initials and progresses,characterized as the decrease of the ratio between“good”and“potentially pathogenic”*** the primary disease is controlled via antiviral treatment,the gut microbiota dysfunction tends to be ***,the recovery of gut microbiota can promote the regression of liver *** strategies targeted on gut microbiota(rifaximin,probiotics,engineered probiotics and fecal microbiota transplantation)have been applied to animal models and patients,obtaining satisfactory results.

关键词： Hepatitis B virus Gut microbiota liver fibrosis liver cirrhosis Hepatic encephalopathy Fecal microbiota transplantation

GPU-based cross-platform Monte Carlo proton dose calculation engine in the framework of Taichi

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Nuclear Science and Techniques 2023年第5期34卷 152-162页

作者： Wei-guang li Cheng Chang yao Qin Zi-Lu Wang Kai-Wen li li-Sheng Geng Hao Wu School of Physics Beihang UniversityBeijing 102206China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Radiation OncologyPeking University Cancer Hospital and Institute52 Fucheng RoadBeijing 100142China Medical Management Department CAS Ion Medical Technology Co.Ltd.Beijing 100190China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Institute of Medical Technology Peking University Health Science Center38 Xueyuan RoadBeijing 100191China

In recent years,graphics processing units(GPUs)have been applied to accelerate Monte Carlo(MC)simulations for proton dose calculation in ***,current GPU platforms,such as Compute Unified Device Architecture(CUda)and Open Computing Language(OpenCL),suffer from cross-platform limitation or relatively high programming ***,the Taichi toolkit,which was developed to overcome these difficulties,has been successfully applied to high-performance numerical *** on the class II condensed history simulation scheme with various proton-nucleus interactions,we developed a GPU-accelerated MC engine for proton transport using the Taichi *** distributions in homogeneous and heterogeneous geometries were calculated for 110,160,and 200 MeV protons and were compared with those obtained by full MC simulations using *** gamma passing rates were greater than 0.99 and 0.95 with criteria of 2 mm,2%and 1 mm,1%,respectively,in all the benchmark ***,the calculation speed was at least 5800 times faster than that of TOPAS,and the number of lines of code was approximately 10 times less than those of CUda or *** study provides a highly accurate,efficient,and easy-to-use proton dose calculation engine for fast prototyping,beamlet calculation,and education purposes.

关键词： Proton therapy Monte Carlo dose calculation GPU acceleration Taichi

Fatigue behavior of uncoated and MCrAlY-coated DS nickelbased superalloys pre-exposed in hot corrosion condition

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Rare Metals 2018年第11期37卷 936-941页

作者： Hong-Yu Qi ji-Shen Yang Xiao-guang Yang Shao-lin li li-Qiang Ma School of Energy and Power Engineering Beihang UniversityBeijing 100191China Collaborative Innovation Center for Advanced Aero-Engine Beijing 100191China Beijing Key Laboratory of Aero-Engine Structure and Strength Beijing 100191China Shenyang Aeroengine Research Institute Shenyang 110015China

The effects of a MCrAlY coating on low-cycle fatigue(LCF) behavior of directionally solidified(DS)nickle-based superalloy DZ125 were investigated. Before the fatigue testings, the specimens were pre-exposed in high-temperature hot corrosion(HTHC) environment generating by a burner rig at 850 ℃. The results show that the coating in hot corrosion condition has beneficial effects on the fatigue resistance of superalloy. Under corrosion condition, the MCrAlY-coated specimens tested have higher fatigue lives than the uncoated specimens at the same stress level. The coating failure results from fatigue process and numerous fatigue cracks were nucleated at the specimen surface, only one main crack propagates inward and the secondary cracks away from the fracture surface are perpendicular to the loading orientation.

关键词： MCrAlY coating Low-cycle fatigue Directionally solidified Ni-based superalloy Hot corrosion Prior exposure

Influence of Tip Clearance on Centrifugal Compressor IGV Regulation and Improvement

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Journal of Thermal Science 2021年第3期30卷 1025-1033页

作者： SUN Qi WANG huishe Zhu Junqiang ji Chunjun li Chunyang yao Ka Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China School of Energy and Power Engineering Dalian University of TechnologyDalian 116024China

In order to avoid collision with the end wall of the casing when the guide vane rotates around its own rotating axis in a centrifugal compressor,a circular gap will be left at the top of guide *** of the gas flow through the clearance cannot be effectively regulated,and the tip clearance leakage vortex is formed,which has an impact on the mainstream and makes the compressor performance *** order to solve this problem,in this paper,three improved schemes of guide vane channel structure,including rectangular channel,cambered channel,and globular channel,were put forward,which can effectively improve the regulation ability of guide *** these three improved channels with the original one,the stable operating range of the compressor was enlarged;the power consumption of the compressor was reduced and the efficiency of the compressor was *** comprehensive comparison,the cambered channel has better performance and is easier to process,which has potential to be widely used in practice.

关键词： centrifugal compressor inlet guide vane tip clearance