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Progress in Natural Science:Materials International 2023年第4期33卷 467-477页

作者： Yang Zheng He Tong Jiawen liu Jia Lu Weirong Li fangfei liu Ziyue Zhang Yan Li School of Aeronautics and Astronautics Tiangong University School of Mechanical Engineering Tiangong University Dongguan Eontec Co.Ltd. School of Materials Science and Engineering Beihang University

The extruded Mg–4Zn–1Mn alloy was prepared and its in vitro corrosion behavior in different physiological solutions of simulated body fluid(SBF), artificial saliva(AS) and artificial urine(AU) was investigated for biomedical applications. The microstructural characterization by optical microscope(OM), X-ray diffractometer(XRD), scanning electron microscopy(SEM) and energy dispersive X-ray spectrometer(EDS) showed that the alloy with an average grain size of approximate 20 μm was mainly composed of α-Mg matrix phase along with some MgZn2and α-Mn precipitates. The results of electrochemical corrosion and immersion corrosion tests revealed a distinct corrosion behavior for the alloy in different solutions with increasing immersion time. The corrosion morphologies were featured with flocculent precipitates in the SBF, flower-like clusters in the AS and columnar crystals in the AU. The alloy exhibited highest corrosion resistance and lowest corrosion rate in the AS compared with the SBF and the AU, which was attributed to the formation of a stable corrosion products layer.

关键词： Biodegradable metals Mg–4Zn–1Mn alloy Physiological solutions Corrosion behavior

Detecting gravitational wave with an interferometric seismometer array on lunar nearside

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Science China(Physics,Mechanics & Astronomy) 2023年第10期66卷 203-223页

作者： Junlang Li fangfei liu Yuan Pan Zijian Wang Mengdi Cao Mengyao Wang Fan Zhang Jinhai Zhang Zong-Hong Zhu Department of Astronomy Beijing Normal UniversityBeijing 100875China Advanced Institute of Natural Sciences Beijing Normal University at ZhuhaiZhuhai 519087China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Engineering Laboratory for Deep Resources Equipment and Technology Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

Our Moon is by far the easiest natural, extraterrestrial celestial object for us to reach, and many space agencies, in particular the China National Space Administration, have publicized plans for manned missions there. Such high-profile projects must yield commensurate scientific outputs to justify their cost to the taxpayers. An important criterion for the selection of candidate experiments is the extent to which the Moon plays an integral and irreplaceable role, as opposed to offering only marginal advantages over Earth-orbit, space-based alternatives. In this study, we propose an experiment that excels in this regard, which considers the Moon as part of the experimental apparatus. Specifically, the Moon acts as a Weber bar-style resonant mass that responds to deci-Hertz gravitational waves(GWs). GW-excited lunar vibrations can be picked up by an array of(prefabricated on Earth and easy to transport to the Moon) small laser interferometric seismometers yielding GW detection. Such a setup would plug a gap in the GW frequency range already covered by the existing or underdevelopment detectors, and it can inform us on important astrophysics topics, such as the progenitors of Type Ia supernovae(SNe Ia) or intermediate mass black holes. We provide the instrument design as well as its deployment strategy, and we also summarize relevant science cases according to the estimated viable sensitivity.

关键词： gravitational waves lunar antenna seismic motion

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Clinical translation and challenges of biodegradable magnesium-based interference screws in ACL reconstruction

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Bioactive Materials 2021年第10期6卷 3231-3243页

作者： Ying Luo Chao Zhang Jue Wang fangfei liu Kelvin Wingho Chau Ling Qin Jiali Wang School of Biomedical Engineering Sun Yat-sen UniversityGuangzhou510006China Hanglok-Tech Co. Ltd.Hengqin New AreaChina State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing100083China Musculoskeletal Research Laboratory Department of Orthopaedics&TraumatologyThe Chinese University of Hong KongHong KongChina

As one of the most promising fixators developed for anterior cruciate ligament(ACL)reconstruction,biodegradable magnesium(Mg)-based interference screws have gained increasing attention attributed to their appropriate modulus and favorable biological properties during degradation after surgical ***,its fast degradation and insufficient mechanical strength have also been recognized as one of the major causes to limit their further application *** review focused on the following four ***,the advantages of Mg or its alloys over their counterparts as orthopaedic implants in the fixation of tendon grafts in ACL reconstruction were ***,the underlying mechanisms behind the contributions of Mg ions to the tendon-bone healing were ***,the technical challenges of Mg-based interference screws towards clinical trials were discussed,which was followed by the introduction of currently used modification methods for gaining improved corrosion resistance and mechanical ***,novel strategies including development of Mg/Titanium(Ti)hybrid fixators and Mg-based screws with innovative structure for achieving clinically customized therapies were ***,the advancements in the basic and translational research on the Mg-based interference screws may lay the foundation for exploring a new era in the treatment of the tendon-bone insertion(TBI)and related disorders.

关键词： Magnesium ACL reconstruction Interference screw Degradation Mechanical properties

Erratum to:Detecting gravitational wave with an interferometric seismometer array on lunar nearside[***.66,109513(2023)]

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 182-183页

This paper"Detecting gravitational wave with an interferometric seismometer array on lunar nearside"[1]was published in SCIENCE CHINA Physics,Mechanics&Astronomy(66,109513(2023),doi:10.1007/s11433-023-2179-9).Due to an oversight on our part,some errors were made in the originally published *** apologize for these errors and offer the corresponding explanations and corrections for the readers.

关键词： gravitational seism wave

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大规模互联单板有限元仿真分析与寿命预测

电子产品可靠性与环境试验 2020年第4期38卷 10-17页

作者：刘放飞工业和信息化部电子第五研究所可靠性与环境工程中心广东广州510610 广东省电子信息产品可靠性技术重点实验室广东广州510610 电子信息产品可靠性分析与测试技术国家地方联合工程中心广东广州510610

对于单板焊点的可靠性评价问题,目前主要借助有限元仿真技术与基于故障物理的PHM技术加以解决。限于单板整板焊点有限元建模与仿真分析的难度与工作量,相关研究中对焊点的有限元仿真与评价主要集中在器件级,而板级的有限元仿真中大多采... 详细信息

对于单板焊点的可靠性评价问题,目前主要借助有限元仿真技术与基于故障物理的PHM技术加以解决。限于单板整板焊点有限元建模与仿真分析的难度与工作量,相关研究中对焊点的有限元仿真与评价主要集中在器件级,而板级的有限元仿真中大多采用了器件的简化模型,实际的仿真规模并不大。通过对包含2.4万体的大型互联单板进行整板的有限元仿真分析与危险焊点的寿命评价,解决了大型互联单板整板的几何建模与有限元建模过程中众多的技术性问题,并提供了一套通用的建模流程与高质量网格的划分方法,显著地降低了因模型构建错误而导致分析失败的可能性,有助于提高有限元仿真分析的质量与效率。

关键词：焊点有限元建模仿真分析寿命预测网格划分

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Improved Corrosion Behavior of Biodegradable Mg-4Zn-1Mn Alloy Modified by Sr/F co-doped CaP Micro-arc Oxidation Coatings

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Research and Application of Materials Science 2023年第2期5卷 1-8页

作者： Weirong LI Yanfang LI Qian LI Xuan XIONG fangfei liu Ronghui LI Heng LI Dong PANG Jia LU Xuan ZHANG Dongguan Eontec Co. Ltd.DongguanGuangdong523000China School of Mechanical Engineering Tiangong UniversityTianjin 300387China

The Sr/F co-doped CaP(Sr/F-CaP)coatings were prepared by micro-arc oxidation(MAO)under different voltages to modify the microstructure and corrosion behavior of Mg-4Zn-1Mn *** surface and interface characteristics investigated using scanning electron microscopy(SEM)and energy dispersive X-ray spectrometer(EDS)showed that the MAO coatings displayed uneven crater-like holes and tiny cracks under lower voltage,while they exhibited relatively homogeneous crater-like holes without cracks under higher *** thickness of MAO coatings increased with increasing *** corrosion behavior of Mg-4Zn-1Mn alloy was improved by the MAO *** MAO coatings prepared under 450 V and 500 V voltages possessed the best corrosion resistance with regard to the electrochemical corrosion tests and immersion corrosion tests,*** MAO coatings fabricated under 450-500 V could provide a better corrosion protection effect for the substrate.

关键词： Biodegradable Mg alloys Mg-4Zn-1Mn alloy Micro-arc oxidation Sr/F co-doped CaP coatings

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《消防法》创新及其价值的几点思考

防灾科技学院学报 2009年第4期11卷 132-135页

作者：刘方飞中国人民武装警察部队学院基础部河北廊坊065000

消防安全历来是治国安邦的一件大事,是民族繁荣昌盛的重要保障。论文主要从新修订《消防法》的创新、价值、存在之不足以及执行等四个方面,阐述修订《消防法》的重要意义。

关键词：创新机制价值执行

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非遗视角下库淑兰剪纸纹样在丝巾文创设计中的应用

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西部皮革 2024年第19期46卷 96-98页

作者：刘芳菲黄淮学院

库淑兰剪纸作为国家级非物质文化遗产，以其独特的造型、丰富的色彩和生动的情感表达，被誉为民间艺术的瑰宝。文章基于探讨库淑兰剪纸的艺术特色及其在丝巾文创设计中的创新应用，分析了库淑兰剪纸的艺术特征及如何将传统剪纸艺术与现... 详细信息

库淑兰剪纸作为国家级非物质文化遗产，以其独特的造型、丰富的色彩和生动的情感表达，被誉为民间艺术的瑰宝。文章基于探讨库淑兰剪纸的艺术特色及其在丝巾文创设计中的创新应用，分析了库淑兰剪纸的艺术特征及如何将传统剪纸艺术与现代设计理念相结合，以提升库淑兰剪纸的知名度和吸引力，促进其传承与发展。研究指出，通过融合设计手法重构剪纸纹样、巧妙运用构图方式增强视觉冲击力，以及采用多元制作工艺丰富质感体验等方法，可以有效地将库淑兰剪纸艺术融入丝巾文创设计中，为非物质文化遗产的创造性转化和创新性发展提供新的探索路径。

关键词：非物质文化遗产库淑兰剪纸丝巾文创设计