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Frontiers of Materials Science 2019年第1期13卷 87-98页

作者： Xiao-Jing JI qiang CHENG Jing WANG Yan-Bin ZHAO Zhuang-Zhuang HAN Fen ZHANG shuo-qi LI Rong-Chang ZENG Zhen-Lin WANG College of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China College of Materials Science and Engineering Chongqing University of TechnologyChongqing 400065China

Magnesium(Mg)alloys have attracted considerable research attention as potential biocompatible implant ***,the major barriers to the extended use of such medical devices are the possibility of high corrosion rate and implantassociated *** solve them,a novel polyacrylic acid(PAA)/gentamicin sulfate(GS)-hydroxyapatite(HAp)coating was synthesized by a one-step hydrothermal deposition *** of functional coatings were investigated by SEM,FTIR and *** properties of samples were evaluated by electrochemical and hydrogen evolution *** activities of the coatings against Staphylococcus aureus(***)were measured by the plate-counting *** showed that the as-prepared HAp coating with dense and flawless morphologies could not only enhance the corrosion resistance of Mg alloys,but also improve the adhesion strength between the HAp coating and the *** addition,the induction of the apatite coating during immersion confirmed the excellent mineralization ability of the HAp ***,the obtained HAp coati ng possessed antibacterial properties and could prolong the release of ***,the PAA/GS-HAp coated Mg alloy could serve as a better candidate for biomedical applications with good anti-corrosion and antibacterial properties.

关键词： magnesium alloy corrosion resistance antibacterial performance drug release hydroxyapatite coating

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SLM过程中飞溅形成机制和控制方法综述

稀有金属材料与工程 2024年第7期53卷 2094-2108页

作者：刘琦杨光殷俊赵朔安达沈阳航空航天大学机电工程学院辽宁沈阳110136 辽宁省高性能金属增材制造工程研究中心辽宁沈阳110136 沈阳飞机工业(集团)有限公司辽宁沈阳110086

由于选区激光熔化(SLM)技术加工周期较短、易于成形结构复杂的零件,现已广泛应用于生物医疗、航空航天、汽车和军工制造业等领域。但是由于在成形过程中激光与粉末间复杂的相互作用,选区激光熔化制件的缺陷呈现出多样化的特点,且控制难... 详细信息

由于选区激光熔化(SLM)技术加工周期较短、易于成形结构复杂的零件,现已广泛应用于生物医疗、航空航天、汽车和军工制造业等领域。但是由于在成形过程中激光与粉末间复杂的相互作用,选区激光熔化制件的缺陷呈现出多样化的特点,且控制难度加大,这在一定程度上限制了该技术的发展和应用。对于飞溅缺陷的形成机制和控制方法的研究,是近年来研究的热点之一。总结了近年来的相关研究成果,将粉末、熔池及成形层作为线索,从飞溅物对成形件的影响、飞溅物形成原因、监测和控制方法以及未来研究方向4部分阐述SLM过程中飞溅形成机制和控制方法,并展望了未来的发展方向。

关键词： SLM 缺陷飞溅熔池

Advances in layer-by-layer self-assembled coatings upon biodegradable magnesium alloys

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Science China Materials 2021年第9期64卷 2093-2106页

作者： Li-Jun He Yang Shao shuo-qi Li Lan-Yue Cui Xiao-Jing Ji Yan-Bin Zhao Rong-Chang Zeng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao266590China

Magnesium(Mg)and its alloys are considered as ideal biodegradable materials due to their excellent mechanical properties and *** order to improve the surface properties to allow better adaptation to the surrounding tissue of the body,surface modification has played a significant role in satisfying multiple clinical requirements such as corrosion resistance,biocompatibility,and antibacterial ***,layer-by-layer(LbL)self-assembly,which can be applied for biodegradable Mg alloys due to its extensive choice of usable units,holds great promise among all the surface *** this review,the mechanisms of the driving force(i.e.,electrostatic interaction,hydrogen bonding,charge transfer interaction and covalent bonding),cuttingedge advances in preparation methods(e.g.,dipping,spraying,and spinning)and the functional properties(corrosion resistance,antibacterial activity,and biocompatibility)that could be achieved by the LbL coatings are summarized.A reasonable trend of the potential development of LbL for bioMg alloys is also proposed at the end of this article.

关键词： layer-by-layer assembly coating magnesium alloys corrosion resistance biocompatibility antibacterial ability

Corrosion resistance of bioinspired DNA-induced Ca-P coating on biodegradable magnesium alloy

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Journal of Magnesium and Alloys 2019年第1期7卷 144-154页

作者： Ping Liu Jia-Min Wang Xiao-Tong Yu Xiao-Bo Chen shuo-qi Li Dong-Chu Chen Shao-Kang Guan Rong-Chang Zeng Lan-Yue Cui College of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Engineering RMIT UniversityCarlton 3053Australia School of Materials Science and Energy Engineering Foshan UniversityFoshan 528000China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

Bioinspired coatings with decreased corrosion rate and enhanced bond strength are at the core of future clinic applications on degradable magnesium(Mg)-based *** hybrid of organic and inorganic compounds offers a strategy to fabricate biodegradable,biocompatible and compact coatings on biomedical Mg ***,a comparison with and without DNA addition was made on the corrosion resistance and adhesion strength of Ca-P coatings fabricated on AZ31 alloy via hydrothermal *** morphology,chemical composition,and crystallographic structure of the coatings were investigated by means of SEM,EDS and FTIR as well as XRD before and after corrosion *** resistance was evaluated via potentiodynamic polarization curves,electrochemical impedance spectroscopy(EIS)and hydrogen evolution tests in Hank’s *** show that the coatings are mainly characterized by tricalcium phosphate(TCP),dicalcium phosphate anhydrous(DCPA)and calcium-deficient hydroxyapatite(CDHA).The presence of DNA leads to the formation of Ca-P coating with improved corrosion resistance and adhesion ***,the formation mechanism for DNA-induced Ca-P coating is *** DNA-induced Ca-P coating exhibits a promising future for controlling the corrosion rate of biodegradable Mg alloys.©2019 Published by Elsevier *** behalf of Chongqing University.

关键词： DNA Corrosion resistance Biodegradability Magnesium alloys Coatings

道路桥梁工程监理中的施工质量问题与处理措施

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FeBO_(3) as a low cost and high-performance anode material for sodium-ion batteries

建筑与装饰 2023年第14期 107-109页

作者：陈烁淇安徽省路兴建设项目管理有限公司安徽阜阳 236000

本文以路桥工程施工质量管理工作开展的重要性为切入点,分析了道路桥梁工程监理质量控制主要内容,在此基础上,进一步提出了道路桥梁工程监理过程中存在的施工质量问题,以及相应的解决措施,希望能为我国道桥工程施工质量的提升提供参考... 详细信息

本文以路桥工程施工质量管理工作开展的重要性为切入点,分析了道路桥梁工程监理质量控制主要内容,在此基础上,进一步提出了道路桥梁工程监理过程中存在的施工质量问题,以及相应的解决措施,希望能为我国道桥工程施工质量的提升提供参考和借鉴.

关键词：道桥工程工程监理工程质量施工质量

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Chinese Chemical Letters 2021年第10期32卷 3113-3117页

作者： Baozhu Wu shuo qi Xikai Wu Haoli Wang qiangqiang Zhuang Huimin Yi Pu Xu Zhennan Xiong Gejun Shi Shuangqiang Chen Baofeng Wang Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric PowerShanghai 200090China Department of Chemical Engineering School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China

The research of borate materials as sodium-ion batteries(SIBs) anode is still in the early stages,but the boron polyoxoanions are attracting intense interest due to their low atomic weight and high electronegative *** this work,FeBO_(3) was prepared with low-cost raw materials and evaluated as SIBs *** FeBO_(3) shows a high reversible capacity of 328 mAh/g at the current density of 0.4 A/*** addition,the electrochemical performance of FeBO_(3) can be improved by carbon *** prepared carbon-coated FeBO_(3) composite has a reversible capacity of 426 mAh/g(at 0.4 A/g) and an outstanding rate capability of 272 mAh/g(at 1.6 A/g).Furthermore,the sodium storage mechanism of FeBO_(3) was studied by in-situ XRD and ex-situ XPS.

关键词： FeBO_(3) Metal borates Anode materials Sodium-ion batteries Sodium storage mechanism

AI for organic and polymer synthesis

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Science China Chemistry 2024年第8期67卷 2461-2496页

作者： Xin Hong qi Yang Kuangbiao Liao Jianfeng Pei Mao Chen Fanyang Mo Hua Lu Wen-Bin Zhang Haisen Zhou Jiaxiao Chen Lebin Su shuo-qing Zhang Siyuan Liu Xu Huang Yi-Zhou Sun Yuxiang Wang Zexi Zhang Zhunzhun Yu Sanzhong Luo Xue-Feng Fu Shu-Li You Center of Chemistry for Frontier Technologies Department of ChemistryZhejiang UniversityHangzhou 310027China Center of Basic Molecular Science Department of ChemistryTsinghua UniversityBeijing 100084China Guangzhou National Laboratory Guangzhou 510005China Center for Quantitative Biology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China School of Materials Science and Engineering Peking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China AI for Science(AI4S)-Preferred Program Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 100085China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Recent years have witnessed the transformative impact from the integration of artificial intelligence with organic and polymer synthesis. This synergy offers innovative and intelligent solutions to a range of classic problems in synthetic chemistry. These exciting advancements include the prediction of molecular property, multi-step retrosynthetic pathway planning, elucidation of the structure-performance relationship of single-step transformation, establishment of the quantitative linkage between polymer structures and their functions, design and optimization of polymerization process, prediction of the structure and sequence of biological macromolecules, as well as automated and intelligent synthesis platforms. Chemists can now explore synthetic chemistry with unprecedented precision and efficiency, creating novel reactions, catalysts, and polymer materials under the datadriven paradigm. Despite these thrilling developments, the field of artificial intelligence(AI) synthetic chemistry is still in its infancy, facing challenges and limitations in terms of data openness, model interpretability, as well as software and hardware support. This review aims to provide an overview of the current progress, key challenges, and future development suggestions in the interdisciplinary field between AI and synthetic chemistry. It is hoped that this overview will offer readers a comprehensive understanding of this emerging field, inspiring and promoting further scientific research and development.

关键词： organic synthesis polymer synthesis machine learning prediction chemical database automated synthesis

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区域产业转移与新型城镇化发展实证研究——以中部六省为例

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哈尔滨学院学报 2022年第1期43卷 51-55页

作者：周朔琦中共山东省委党校(山东行政学院)应急管理培训部山东济南250014

新型城镇化发展是产业结构优化与经济增长的必然结果。文章基于门限回归模型对中部六省区产业转移与新型城镇化关系进行了探讨,结果表明:产业转移对新型城镇化建设具有重要促进作用,尤其在工业发展水平较高省区,这种影响作用更加突出。... 详细信息

新型城镇化发展是产业结构优化与经济增长的必然结果。文章基于门限回归模型对中部六省区产业转移与新型城镇化关系进行了探讨,结果表明:产业转移对新型城镇化建设具有重要促进作用,尤其在工业发展水平较高省区,这种影响作用更加突出。此外,人力资本与居民消费水平对新型城镇化建设也具有显著促进作用。因此,要以地方工业基础为依据,优先承接具有区位优势的产业部门,实现产业转移与城镇化建设的协同发展。

关键词：产业转移新型城镇化门限回归模型

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黏土单层击实试验与制样因子研究

岩土力学 2010年第6期31卷 1797-1802,1808页

作者：汪攀峰丁启朔南京农业大学工学院南京210031

使用非标准击实仪进行单层击样,获取非标准击实状态下单层击实样的密度与击实功及含水率之间的关系,并进一步以得到的击实样获得其抗剪强度。发现当击实功小到一定程度时,击实密度随含水率的增大而不断增大,两者近似线性变化,无峰值出... 详细信息

使用非标准击实仪进行单层击样,获取非标准击实状态下单层击实样的密度与击实功及含水率之间的关系,并进一步以得到的击实样获得其抗剪强度。发现当击实功小到一定程度时,击实密度随含水率的增大而不断增大,两者近似线性变化,无峰值出现。密度峰值对应的含水率与抗剪强度峰值对应的含水率有一个差值,其值在3.4%～5.7%之间。内摩擦角随含水率增大而减小的规律仅适合于一定的击实功。内摩擦角在较小的击实功下有峰值出现,但随着击实功的增大,内摩擦角的变化呈线性而非曲线形式。另外,针对土工室内模型试验的重塑土样制备问题,结合试验数据,给出了试验最优制样参数,并初步提供了评价指标η。

关键词：击实功含水率抗剪强度重塑土样

Time-resolved Spectral Properties of Fermi-GBM Bright Long Gamma-Ray Bursts

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Research in Astronomy and Astrophysics 2024年第2期24卷 58-73页

作者： Wan-Kai Wang Wei Xie Zhi-Fu Gao shuo Xiao Ai-Jun Dong Bin Zhang qi-Jun Zhi Department of Astronomy School of Physics and Electronic ScienceGuizhou Normal UniversityGuiyang 550001China Guizhou Provincial Key Laboratory of Radio Astronomy Data Processing Guizhou Normal UniversityGuiyang 550001China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China

The prompt emission mechanism of gamma-ray bursts(GRBs)is still unclear,and the time-resolved spectral analysis of GRBs is a powerful tool for studying their underlying physical *** performed a detailed time-resolved spectral analysis of 78 bright long GRB samples detected by Fermi/Gamma-ray Burst Monitor.A total of 1490 spectra were obtained and their properties were studied using a typical Band-shape ***,the parameter distributions of the time-resolved spectrum are given as follows:the low-energy spectral indexα~-0.72,high-energy spectral indexβ~2.42,the peak energy E_(p)~221.69 keV,and the energy flux F~7.49×10^(-6)erg cm^(-2)s^(-1).More than 80%of the bursts exhibit the hardest low-energy spectral indexα_(max),exceeding the synchrotron limit(-2/3).Second,the evolution patterns of a and E_(p)were statistically *** results show that for multi-pulse GRBs the intensity-tracking pattern is more common than the hard-to-soft pattern in the evolution of both E_(p)andα.The hard-to-soft pattern is generally shown in single-pulse GRBs or in the initial pulse of multi-pulse ***,we found a significant positive correlation between F and E_(p),with half of the samples exhibiting a positive correlation between F andα.We discussed the spectral evolution of different radiation *** diversity of spectral evolution patterns indicates that there may be more than one radiation mechanism occurring in the GRB radiation process,including photo spheric radiation and synchrotron ***,it may also involve only one radiation mechanism,but more complicated physical details need to be considered.

关键词： (stars:)gamma-ray burst general-methods statistical-methods data analysis