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Acta Mathematica Scientia 2023年第2期43卷 597-607页

作者：蔺友江吴尉迟 School of Mathematics and Statistics Chongqing Technology and Business UniversityChongqing 400067China School of Mathematics science East China Normal UniversityShanghai 200241China Shanghai Key Laboratory of Pure Mathematics and Mathematical Practice Shanghai 200241China

In this paper,we study some basic properties on Lipschitz star bodies,such as the equivalence between Lipschitz star bodies and star bodies with respect to a ball,the equivalence between the convergence of Lipschitz star bodies with respect to Hausdorff distance and the convergence of Lipschtz star bodies with respect to radial distance,and the convergence of Steiner symmetrizations of Lipschitz star bodies.

关键词： Steiner symmetrization star body Lipschitz function

Research and progress of cartilage tissue-engineering scaffold materials

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Discussion of Clinical Cases 2015年第3期2卷 51-54页

作者： Hongli Zhai yuchi wu The Third Affiliated Hospital of Inner Mongolia Medical University BaotouChina

Due to the limited self healing capacity of human cartilage,the repair of defects gives rise to a challenging clinical *** tissue engineering provides a new method to solve cartilage ***,the search for a suitable biological vector material has long been the focus of research interest in this *** this paper,the present situation of cartilage tissue engineering vector materials is reviewed.

关键词： Cartilage tissue Scaffold material

Design and performance study of a gas-Cherenkov detector with an off-axis parabolic reflector for inertial confinement fusion experiments

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Plasma Science and Technology 2021年第1期23卷 39-47页

作者： Zifeng SONG Bin ZHU Yunqing XIAO Tao XU Zhongjie LIU yuchi wu Xiayu ZHAN Tao YI Jiabin CHEN Qi TANG Laser Fusion Research Center China Academy of Engineering PhysicsMianyang 621900People’s Republic of China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering PhysicsMianyang 621900People’s Republic of China

In this work,the gas-Cherenkov detector with an off-axis parabolic reflector(Opr GCD)is designed using the Geant4 Monte Carlo simulation toolkit,which is helpful to improve the collection efficiency of Cherenkov *** method to study the performance of Opr GCD based on femtosecond laser-wakefield-accelerated electron beams is *** signals with high signal-to-noise ratio were obtained,and the measured Cherenkov signals changing with the CO2 pressure were consistent well with the simulation *** design and study of this Opr GCD system lay the foundation for the application of fusion gamma diagnostics system in large laser facilities of China.

关键词： fusion gamma Cherenkov detector Monte Carlo simulation laser-wakefieldaccelerated electron

Manipulation and optimization of electron transport by nanopore array targets

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Plasma Science and Technology 2021年第1期23卷 8-14页

作者： Yue YANG Boyuan LI yuchi wu Bin ZHU Bo ZHANG Zhimeng ZHANG Minghai YU Feng LU Kainan ZHOU Lianqiang SHAN Lihua CAO Zongqing ZHAO Weimin ZHOU Yuqiu GU Laser Fusion Research Center China Academy of Engineering PhysicsMianyang 621900People’s Republic of China Key Laboratory for Laser Plasmas(Ministry of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Institute of Applied Physics and Computational Mathematics Beijing 100088People’s Republic of China Key Laboratory of HEDP of the Ministry of Education&CAPT Peking UniversityBeijing 100871People’s Republic of China

The transport of sub-picosecond laser-driven fast electrons in nanopore array targets is *** to the generation of micro-structured magnetic fields,most fast electron beams are proven to be effectively guided and restricted during the *** transport patterns of fast electrons in the targets are observed in experiments and reproduced by particle-in-cell simulations,representing two components:initially collimated low-energy electrons in the center and high-energy scattering electrons turning into surrounding annular *** critical energy for confined electrons is deduced *** electron guidance and confinement by the nano-structured targets offer a technological approach to manipulate and optimize the fast electron transport by properly modulating pulse parameters and target design,showing great potential in many applications including ion acceleration,microfocus x-ray sources and inertial confinement fusion.

关键词： nanopore array laser-driven electrons fast electron transport electron collimation

Orlicz Brunn-Minkowski理论

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中国科学：数学 2021年第1期51卷 87-96页

作者：徐赟吴尉迟冷岗松上海大学理学院数学系上海200444 华东师范大学数学科学学院上海200241 上海市核心数学与实践重点实验室上海200241

本文主要介绍Orlicz Brunn-Minkowski理论,并从下面3个方面介绍该理论:Orlicz投影体和Orlicz质心体、Orlicz加法与其相关体积不等式、Orlicz Minkowski问题.

关键词： Orlicz投影体 Orlicz质心体 Orlicz加法 Orlicz Minkowski问题

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牙科陶瓷材料的摩擦学性能研究进展

材料工程 2022年第2期50卷 1-11页

作者：雷磊伍雨驰程子晋刘莉郑靖西南交通大学材料先进技术教育部重点实验室摩擦学研究所成都610031 西南交通大学医院口腔科成都610031

陶瓷材料因其优异的耐磨性、化学稳定性、生物相容性和美观性被广泛用于牙齿缺损和缺失修复。本文首先介绍了牙科陶瓷材料的化学成分、微观结构和力学性能,基于陶瓷材料的磨损与磨蚀机制,归纳总结了牙科陶瓷材料摩擦学性能优化方面所取... 详细信息

陶瓷材料因其优异的耐磨性、化学稳定性、生物相容性和美观性被广泛用于牙齿缺损和缺失修复。本文首先介绍了牙科陶瓷材料的化学成分、微观结构和力学性能,基于陶瓷材料的磨损与磨蚀机制,归纳总结了牙科陶瓷材料摩擦学性能优化方面所取得的进展,指出陶瓷材料和天然人牙摩擦学性能失配严重制约了陶瓷修复体的临床应用,进而从室验介质、对摩副以及载荷、位移和循环次数等方面分析汇总牙科陶瓷材料摩擦学性能的体外测试方法。最后,从仿生摩擦学角度探讨了牙科陶瓷材料的未来发展趋势,并指出研制仿生陶瓷基复合材料是解决陶瓷修复体与天然人牙摩擦学性能失配难题最具潜力的策略。

关键词：牙科陶瓷材料摩擦学性能测试方法微观结构仿生设计

Diagnosis of indirectly driven double shell targets with point-projection hard x-ray radiography

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Matter and Radiation at Extremes 2024年第2期9卷 50-62页

作者： Chao Tian Minghai Yu Lianqiang Shan Fengjuan wu Bi Bi Qiangqiang Zhang yuchi wu Tiankui Zhang Feng Zhang Dongxiao Liu Weiwu Wang Zongqiang Yuan Siqian Yang Lei Yang Zhigang Deng Jian Teng Weimin Zhou Zongqing Zhao Yuqiu Gu Baohan Zhang Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering PhysicsMianyang 621900People’s Republic of China Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and TechnologyMianyang 621010People’s Republic of China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

We present an application of short-pulse laser-generated hard x rays for the diagnosis of indirectly driven double shell targets. Coneinserted double shell targets were imploded through an indirect drive approach on the upgraded SG-II laser facility. Then, based on thepoint-projection hard x-ray radiography technique, time-resolved radiography of the double shell targets, including that of their near-peakcompression, were obtained. The backlighter source was created by the interactions of a high-intensity short pulsed laser with a metalmicrowire target. Images of the target near peak compression were obtained with an Au microwire. In addition, radiation hydrodynamicsimulations were performed, and the target evolution obtained agrees well with the experimental results. Using the radiographic images, arealdensities of the targets were evaluated.

关键词： double projection point

Virtual source approach for maximizing resolution in high-penetration gamma-ray imaging

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Matter and Radiation at Extremes 2024年第3期9卷 19-30页

作者： yuchi wu Shaoyi Wang Bin Zhu Yonghong Yan Minghai Yu Gang Li Xiaohui Zhang Yue Yang Fang Tan Feng Lu Bi Bi Xiaoqin Mao Zhonghai Wang Zongqing Zhao Jingqin Su Weimin Zhou Yuqiu Gu National Key Laboratory of Plasma Physics Laser Fusion Research CenterCAEPMianyangSichuan 621900China College of Physics Sichuan UniversityChengdu 610065China

High-energy gamma-ray radiography has exceptional penetration ability and has become an indispensable nondestructive testing(NDT)tool in various *** high-energy photons,point projection radiography is almost the only feasible imaging method,and its spatial resolution is primarily constrained by the size of the gamma-ray *** conventional industrial applications,gamma-ray sources are commonly based on electron beams driven by accelerators,utilizing the process of bremsstrahlung *** size of the gamma-ray source is dependent on the dimensional characteristics of the electron *** research has been conducted on various advanced accelerator technologies that have the potential to greatly improve spatial resolution in *** our investigation of laser-driven gamma-ray sources,a spatial resolution of about 90μm is achieved when the areal density of the penetrated object is 120 g/cm^(2).A virtual source approach is proposed to optimize the size of the gamma-ray source used for imaging,with the aim of maximizing spatial *** this virtual source approach,the gamma ray can be considered as being emitted from a virtual source within the convertor,where the equivalent gamma-ray source size in imaging is much smaller than the actual emission *** the basis of Monte Carlo simulations,we derive a set of evaluation formulas for virtual source scale and gamma-ray emission *** optimal conditions,the virtual source size can be as small as 15μm,which can significantly improve the spatial resolution of high-penetration imaging to less than 50μm.

关键词： resolution approach utilizing

多狭缝法测量激光尾场电子束发射度的模拟研究

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强激光与粒子束 2016年第2期28卷 46-51页

作者：陈佳吴玉迟董克攻谷渝秋中国工程物理研究院激光聚变研究中心等离子体物理重点实验室四川绵阳621900

发射度是描述束流品质的重要物理量,根据发射度和传输矩阵可以准确计算束流包络和发散角的变化。在考察传统加速器束流发射度测量方法的基础上,提出采用多狭缝法对激光尾场产生的电子束发射度进行测量。采用宽度为20μm的多狭缝板对发... 详细信息

发射度是描述束流品质的重要物理量,根据发射度和传输矩阵可以准确计算束流包络和发散角的变化。在考察传统加速器束流发射度测量方法的基础上,提出采用多狭缝法对激光尾场产生的电子束发射度进行测量。采用宽度为20μm的多狭缝板对发射度为0.05 mm·mrad的激光尾场加速电子发射度进行测量,数值模拟结果表明采用多狭缝法测量的相对误差可以控制在5%以内。并给出了不同狭缝参数对测量精度的影响,模拟结果表明狭缝宽度对发射度测量精度影响最大。狭缝宽度越窄,测量精度越高,反之,则越低。

关键词：激光尾场加速电子发射度多狭缝法