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Journal of Environmental Sciences 2007年第10期19卷 1266-1271页

作者： xiao Jun-ping ZHOU Qing-xiang BAI Hua-hua Department of Chemistry University of Science and Technology Beijing Beijing 100083 China Henan Key Laboratory for Environmental Pollution Control School of Chemistry and Environmental Sciences Henan Normal University Xinxiang 453007 China

In this study we investigated the enrichment ability of oxidized multiwalled carbon nanotubes （MWCNTs） and established a new method for the determination of trace cadmium in environment with flame atomic absorption spectrometry. The MWCNTs were oxidized by potassium permanganate under appropriate conditions before use as preconcentration packing. Parameters influencing the recoveries of target analytes were optimized. Under optimal conditions, the target analyte exhibited a good linearity （R^2=0.9992） over the concentration range 0.5-50 ng/ml. The detection limit and precision of the proposed method were 0.15 ng/ml and 2.06%, respectively. The proposed method was applied to the determination of cadmium in real-world environmental samples and the recoveries were in the range of 91.3%-108.0%. All these experimental results indicated that this new procedure could be applied to the determination of trace cadmium in environmental waters.

关键词： multiwalled carbon nanombes (MWCNTs) solid-phase extraction flame atomic absorption spectrometry

3D Mineral Prospectivity Mapping Based on Deep Metallogenic Prediction Theory:A Case Study of the Lala Copper Mine,Sichuan,China

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Journal of Earth Science 2021年第2期32卷 348-357页

作者： Keyan xiao Jie xiang Mingjing Fan Yang Xu MNR Key Laboratory of Metallogeny and Mineral Resource Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China International Mining Research Center China Geological SurveyBeijing 100037China China Mining News China Geological SurveyBeijing 100037China Institute of Geological Survey China University of GeosciencesWuhan 430074China China University of Geosciences Beijing 100083China

With the decrease in surface and shallow ore deposits,mineral exploration has focused on deeply buried ore bodies,and large-scale metallogenic prediction presents new opportunities and *** paper adopts the predictive thinking method in this era of big data combined with specific research on the special exploration and exploitation of deep-earth *** basic theoretical models of large-scale deep mineralization prediction and evaluation are explored:mineral prediction geological model theory,multidisciplinary information correlation theory,mineral regional trend analysis theory,and mineral prediction geological differentiation *** main workflow of large-scale deep resource prediction in the digital and information age is summarized,including construction of ore prospecting models of metallogenic systems,multiscale 3 D geological modeling,and 3 D quantitative prediction of deep *** the Lala copper mine in Sichuan Province as an example,this paper carries out deep 3 D quantitative prediction of mineral resources and makes a positive contribution to the future prediction and evaluation of mineral resources.

关键词： deep mine resources prospectivity mapping 3D modeling quantitative evaluation Lala copper mine

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*** Rate and L^(p)-Convergence of bisexual Branching Processes in a Random Environment and Varying Environment

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Acta Mathematicae Applicatae Sinica 2023年第2期39卷 337-353页

作者： Sheng xiao xiang-dong LIU Ying-qiu LI School of economics Jinan UniversityGuangzhou510632China School of Mathematics and Statistics Changsha University of Science and TechnologyChangsha 410004China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science and TechnologyChangsha 410004China

Let(Z_(n))be a supercritical bisexual branching process in a random environmentξ.We study the almost sure(a.s.)convergence rate of the submartingale W_(n)=Z_(n)/In to its limit W,where(In)is an usually used norming *** prove that under a moment condition of order p∈(1,2),W-W_(n)=o(e^(-na))*** some a>0 that we find explicitly;assuming the logarithmic moment condition holds,we haveW-W_(n)=o(n^(-α))a.s..In order to obtain these results,we provide the L^(p)-convergence of(W_(n));similar conclusions hold for a bisexual branching process in a varying environment.

关键词： bisexual branching process convergence rate varying environment random environment

Environmental risks for application of magnesium slag to soils in China

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Journal of Integrative Agriculture 2020年第7期19卷 1671-1679页

作者： WANG xiao-bin YAN xiang LI Xiu-ying Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China

Magnesium slag(MS)is one of the main industrial solid wastes produced by the magnesium *** the problem of its disposal has attracted much attention with increasing amounts of solid wastes generated in the production of metallic *** MS contains calcium(Ca),magnesium(Mg),and silicon(Si),some have tried to use MS as Si-Ca-Mg fertilizer or for soil amendment in ***,in the magnesium metallurgical process,some pollutant elements are introduced into MS,resulting in the enrichment of these pollutants in MS,such as arsenic(As),chromium(Cr),cadmium(Cd),mercury(Hg),copper(Cu),nickel(Ni),fluorine(F)and chlorine(CI).Research indicates that the enrichment of these pollutants can result in high levels,especially for Cd,Hg,Cu,Ni,F and CI(0-4,0-0.74,20-127,100-170,2277-14800 and 133-1000 mg kg1,respectively)in some MS in *** levels are often far beyond the limits(S0.3,s0.5,≤50 and≤60 mg·kg-1 for Cd,Hg,Cu and Ni,respectively)of the Chinese Risk Screening Values for Soil Contamination of Agricultural Land based on the Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land(GB 15618-2018)or the critical reference values(<800 and≤200 for F and CI,respectively).The elements Hg,Cu,Cr and F(detected in MS leachate at 0.00023--0.0052,0.043--3.89,0.026-0.171,and 1.43-8.52 mg·L-1,respectively)also exceed the limits(Class IV-V)of the Chinese Standard for Groundwater Quality(GB/T 14848-2017).Based on the above results,it is suggested that without any pretreatment for reducing harmful pollutants MS should not be allowed to be applied for soil remediation or conditioning directly into farmlands in order to ensure soil health,food safety and environmental quality.

关键词： environmental safety risk heavy metals industrial solid wastes magnesium slag

Characterization of Nested Hollow Inorganic Fullerene-like Tungsten Disulfide Nanoparticles Prepared by Solid-Gas Reaction

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Chinese Chemical Letters 2003年第3期14卷 312-315页

作者： Wei xiang CHEN xiao Chun MA 等 DepartmentofChemistry DepartmentofMeterialScienceandEngineeringZhejiangUniversityHangzhou310027 CollegeofMechanicalandElectronicEngineering ZhejiangUniversityofTechnologyHanghou3

Non-carbon inorganic fullerene-like (IF) nanoscale materials have recently attracted intense interest due to their nested hollow and nanotube structures. In this letter, IF-WS2 nanoparticles prepared by solid-gas reaction were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that the IF-WS2 nanoparticles have a nested hollow closed spherical structure with diameter of 100-150 nm.

关键词： Inorganic fullerene-like WS2 nanoparticles.

Targeting tumor-associated macrophages to synergize tumor immunotherapy

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Signal Transduction and Targeted Therapy 2021年第3期6卷 795-806页

作者： xiaonan xiang Jianguo Wang Di Lu xiao Xu Department of Hepatobiliary and Pancreatic Surgery Hangzhou First People's HospitalZhejiang University School of MedicineHangzhouChina NHC Key Laboratory of Combined Multi-organ Transplantation Key Laboratory of the Diagnosis and Treatment of Organ TransplantationCAMSHangzhouChina Department of Hepatobiliary and Pancreatic Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhouChina

The current treatment strategies in advanced malignancies remain ***,immunotherapies have raised hope for a successful control of these advanced diseases,but their therapeutic responses are suboptimal and vary considerably among ***-associated macrophages(TAMs)are a major component of the tumor microenvironment(TME)and are often correlated with poor prognosis and therapy resistance,including ***,a deeper understanding of the complex roles of TAMs in immunotherapy regulation could provide new insight into the ***,targeting of TAMs is an emerging field of interest due to the hope that these strategies will synergize with current *** this review,we summarize recent studies investigating the involvement of TAMs in immune checkpoint inhibition,tumor vaccines and adoptive cell transfer therapies,and discuss the therapeutic potential of targeting TAMs as an adjuvant therapy in tumor immunotherapies.

关键词： immunotherapy involvement diseases

Homologous layered InFeO3(ZnO)m:new promising abradable seal coating materials

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Rare Metals 2018年第2期37卷 79-94页

作者： Wei-Wei Qu xiao-Xuan Zhang bi-Fei Yuan Li-Dong Zhao School of Materials Science and Engineering BeihangUniversityBeijing 100191China China National Petroleum Corporation Greatwall Drilling Company Beijing 100101China

As promising abradable seal coating materials used in high temperature range, the homologous layered InFeO3（ZnO）m （m = 1, 2, 3...20） have attracted great attention. In this short review, we summary the research progress in InFeO3（ZnO）m that were developed in our group. We first introduced a series of conventional abradable seal coating materials as a research motivation. Second, the phase composition and crystal structures of lnFeO3（ZnO）m system were presented. Then, their thermophysical properties, as the most important part, were introduced in detail. At last, the mechanical properties such as hardness, friction coefficient, erosion wear resistance of InFeO3（ZnO）m system were also described. Our summary indicates that InFeO3（ZnO）m sys- tems are promising abradable seal coating materials.

关键词： Abradable seal coating InFeO3(ZnO)m Thermal conductivity Thermal expansion coefficient Mechanical properties

甲烷/乙烷混合工质纳米液膜蒸发传质特性的研究

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原子与分子物理学报 2025年第5期42卷 72-80页

作者：林小晨丁鑫李雅宁兰志向刘纳张林阳郭健翔青岛理工大学环境与市政工程学院青岛266520 青岛娄山河水务资源有限公司青岛266000

采用分子动力学模拟方法研究了五种不同配比甲烷/乙烷混合工质纳米液膜的汽化过程,从蒸发现象、能量变化、涨落耗散规律及相对分子汽化量四个方面分析了混合工质的蒸发传质特性.结果表明:混合工质纳米液膜中甲烷配比越大,汽化起始时间越... 详细信息

采用分子动力学模拟方法研究了五种不同配比甲烷/乙烷混合工质纳米液膜的汽化过程,从蒸发现象、能量变化、涨落耗散规律及相对分子汽化量四个方面分析了混合工质的蒸发传质特性.结果表明:混合工质纳米液膜中甲烷配比越大,汽化起始时间越早,汽化过程越剧烈,汽化的持续时间越短,固定吸附层越薄,模拟体系动能和势能的增量越小,乙烷的存在会抑制甲烷的汽化;由涨落耗散分析可得,甲烷配比越大,对乙烷汽化的促进作用越强,汽化弛豫时间越短,整体汽化速率越快,传质效果越好.

关键词：混合工质纳米液膜传热传质涨落耗散分子动力学模拟

A machine learning-based calibration method for strength simulation of self-piercing riveted joints

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Advances in Manufacturing 2024年第3期12卷 465-483页

作者： Yu-xiang Ji Li Huang Qiu-Ren Chen Charles K.S.Moy Jing-Yi Zhang xiao-Ya Hu Jian Wang Guo-bi Tan Qing Liu Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing210009People’s Republic of China Design School Xi’an Jiaotong-Liverpool UniversitySuzhou215123JiangsuPeople’s Republic of China Materials bigdata and Applications Division Materials Academy JitriSuzhou215131JiangsuPeople’s Republic of China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094People’s Republic of China

This paper presents a new machine learning-based calibration framework for strength simulation models of self-piercing riveted(SPR)*** simulations were conducted through the integrated modeling of SPR joints from process to performance,while physical quasi-static tensile tests were performed on combinations of DP600 high-strength steel and 5754 aluminum alloy sheets under lap-shear loading conditions.A sensitivity study of the critical simulation parameters(e.g.,friction coefficient and scaling factor)was conducted using the controlled variables method and Sobol sensitivity analysis for feature ***,machine-learning-based surrogate models were used to train and accurately represent the mapping between the detailed joint profile and its load-displacement *** of the simulation model is defined as a dual-objective optimization task to minimize errors in key load displacement features between simulations and experiments.A multi-objective genetic algorithm(MOGA)was chosen for *** three combinations of SPR joints illustrated the effectiveness of the proposed framework,and good agreement was achieved between the calibrated models and experiments.

关键词： Machine learning Self-piercing riveting(SPR) Sensitivity analysis Multi-objective optimization

Effect of rare earth content on microstructure and corrosion resistance of hot-dip Zn-5Al alloy coated steel wire for bridge cables

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Journal of Iron and Steel Research International 2023年第10期30卷 2101-2110页

作者： xiao-xiong Zhu Yi-fu Shen Cheng-tao Li xiang Dai Guo-hao xiao College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics(NUAA)Nanjing 211106JiangsuChina Jiangsu Tokyo Rope Co. Ltd.Jiangyin 214425JiangsuChina Nanjing Vocational University of Industry Technology Nanjing 210023JiangsuChina

The effects of the content of rare earth elements on the microstructure and properties of hot-dip Zn-5 Al alloy steel wire for bridge cables were *** microstructure of the hot-dip coating was analyzed using an optical microscope and a scanning electron microscope equipped with an energy-dispersive *** bonding force between the hot-dip coating and steel wire was determined by the winding *** corrosion resistance of the steel wire hot-dip coating was tested by the electrochemical *** hot-dip Zn-5A1 alloy coating has a corrosion-resistant structure composed of a zinc-rich phase and an aluminum-rich *** to the enhanced bonding force,the micro structure of the hot-dip coating of the Zn-5A1 alloy with rare earth elements is more compact and uniform than that without rare earth *** addition of rare earth elements improves the corrosion resistance of Zn-5A1 alloy coated steel *** to the rare earth segregation,which prevents the corrosion of the grain boundary and enhances the anti-intergranular corrosion performance,steel wire exhibits the optimum corrosion resistance when the content of rare earth elements is 0.08 wt.%.

关键词： Bridge cable steel wire Hot dipping Rare earth content Corrosion resistance Microstructure