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High Power Laser Science and Engineering 2024年第1期12卷 84-98页

作者： Yujia Zhang Wei Fan Jiangfeng Wang Xiaochao Wang Xinghua Lu Dajie Huang Shouying Xu Yanli Zhang Mingying Sun zhaoyang jiao Shenlei Zhou Xiuqing Jiang Key Laboratory of High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Frequency modulation(FM)-to-amplitude modulation(AM) conversion is an important factor that affects the time±power curve of inertial confinement fusion(ICF) high-power laser facilities. This conversion can impact uniform compression and increase the risk of damage to optics. However, the dispersive grating used in the smoothing by spectral dispersion technology will introduce a temporal delay and can spatially smooth the target. The combined effect of the dispersive grating and the focusing lens is equivalent to a Gaussian low-pass filter, which is equivalent to 8 GHz bandwidth and can reduce the intensity modulation on the target to below 5% with 0.3 nm @ 3 GHz + 20 GHz spectrum phase modulation. The results play an important role in the testing and evaluating of the FM-to-AM on the final optics and the target, which is beneficial for comprehensively evaluating the load capacity of the facility and isentropic compression experiment for ICF.

关键词： dispersion grating frequency modulation-to-amplitude modulation conversion high-power laser facility inertial confinement fusion phase modulation

高功率激光系统中调制光束的复杂非线性传输效应

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中国激光 2024年第11期51卷 131-142页

作者：刘雨欣焦兆阳王宏昌孙明营朱健强中国科学院上海光学精密机械研究所高功率激光物理联合实验室上海201800 中国科学院大学材料与光电研究中心北京100049

非线性光场增强是导致高功率激光装置终端光学元件损伤的主要原因之一。系统地研究单缺陷的精细形貌以及双缺陷的三维空间分布对调制光束的非线性演变规律的影响,发现了多种非线性传输新现象并揭示了其产生机制。仿真结果表明:边缘陡峭... 详细信息

非线性光场增强是导致高功率激光装置终端光学元件损伤的主要原因之一。系统地研究单缺陷的精细形貌以及双缺陷的三维空间分布对调制光束的非线性演变规律的影响,发现了多种非线性传输新现象并揭示了其产生机制。仿真结果表明:边缘陡峭的单一缺陷会产生双峰热像,这打破了传统认知中缺陷和热像在纵向的共轭关系;双缺陷间的相互作用导致双缺陷中轴位置上额外热像峰的出现,打破了缺陷和热像在横向的一一对应关系。系列研究结果表明了调制光束非线性传输的复杂性,上游缺陷的精细形貌差别和相互干涉均可能使得下游产生额外的光场强区,强度得到进一步增强,最终导致基于原有关于B积分和热像认知的驱动器非线性控制策略失效。本研究结果加深了对复杂非线性光场传输规律的认知,不仅有助于优化装置中终端元件的排布,而且对高功率激光装置中大口径光学元件缺陷的精密检测和评估提出了新的要求,为高功率激光装置的终端负载能力提高提供了重要技术参考。

关键词：高功率激光驱动器非线性传输效应缺陷光场调制自聚焦

Spatio-temporal evolution of the optical field on a hohlraum wall at the rising edge of a flat-topped pulse

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High Power Laser Science and Engineering 2013年第2期1卷 88-93页

作者： zhaoyang jiao Yanli Zhang Junyong Zhang Jianqiang Zhu Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

Considering the time delay in different hohlraum wall positions caused by oblique incidence,the spatio-temporal optical field distribution characteristics of a hohlraum wall,especially during the rising edge of a flat-topped pulse,is simulated by a fast Fourier transform method together with *** demonstrate that beam propagation along the hohlraum wall is a push-broom process with complex dynamic spatial–temporal *** the first few picoseconds,the optical intensity of the front position increases rapidly,while that of the rear position is relatively *** ratio R of the optical intensity during the rising edge is smaller than that of the steady state.R gradually increases and finally tends to the value of the steady state with *** also shows that,with shorter total width of the rising edge,R of the optical field decreases and the difference compared to the steady state becomes *** evolution is more severe with smaller angle of inclination.

关键词： chromatography hohlraum wall optical field distribution rising edge spatio-temporal evolution

Visualizing Wallerian degeneration in the corticospinal tract after sensorimotor cortex ischemia in mice

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Neural Regeneration Research 2024年第3期19卷 636-641页

作者： jiao Mu Liufang Hao Zijue Wang Xuyang Fu Yusen Li Fei Hao Hongmei Duan zhaoyang Yang Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration School of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Neurobiology School of Basic Medical SciencesCapital Medical UniversityBeijingChina

Stroke can cause Wallerian degeneration in regions outside of the brain,particularly in the corticospinal *** investigate the fate of major glial cells and axons within affected areas of the corticospinal tract following stroke,we induced photochemical infarction of the sensorimotor cortex leading to Wallerian degeneration along the full extent of the corticospinal *** first used a routine,sensitive marker of axonal injury,amyloid precursor protein,to examine Wallerian degeneration of the corticospinal *** antibody to amyloid precursor protein mapped exclusively to proximal axonal segments within the ischemic cortex,with no positive signal in distal parts of the corticospinal tract,at all time *** improve visualization of Wallerian degeneration,we next utilized an orthograde virus that expresses green fluorescent protein to label the corticospinal tract and then quantitatively evaluated green fluorescent protein-expressing *** this approach,we found that axonal degeneration began on day 3 post-stroke and was almost complete by 7 days after *** addition,microglia mobilized and activated early,from day 7 after stroke,but did not maintain a phagocytic state over ***,astrocytes showed relatively delayed mobilization and a moderate response to Wallerian ***,no anterograde degeneration of spinal anterior horn cells was observed in response to Wallerian degeneration of the corticospinal *** conclusion,our data provide evidence for dynamic,pathogenic spatiotemporal changes in major cellular components of the corticospinal tract during Wallerian degeneration.

关键词： corticospinal tract green fluorescent protein microglia spinal anterior horn cells stroke virus trace Wallerian degeneration

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基于刀口仪轴向移动的自动化非球面检测技术

光学学报 2022年第23期42卷 79-86页

作者：华翔焦兆阳朱健强中国科学院上海光学精密机械研究所高功率激光物理重点实验室上海201800 中国科学院中国工程物理研究院高功率激光物理联合实验室上海201800 中国科学院大学北京100049

为了解决自动化刀口仪面临的如何搜索并收敛到特征点的核心问题,提出一种基于刀口仪轴向移动的非球面检测技术,实现了在搜索过程中提取环带误差信息,一方面在搜索过程中动态获得波前特性,另一方面可以加速收敛找到特征点。利用所提方法... 详细信息

为了解决自动化刀口仪面临的如何搜索并收敛到特征点的核心问题,提出一种基于刀口仪轴向移动的非球面检测技术,实现了在搜索过程中提取环带误差信息,一方面在搜索过程中动态获得波前特性,另一方面可以加速收敛找到特征点。利用所提方法对不同参数的镜面环带误差进行检测,所得带差位置与干涉仪检测结果的相对误差小于3.3%,验证了所提方法的有效性。所提方法为刀口仪的自动化测量提供了一个便捷的解决方案,为进一步提高非球面加工效率提供了技术支撑。

关键词：测量刀口仪自动化光学检测光学仪器

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基于虚拟光阑调制的刀口法自动定量检测技术

光学学报 2023年第21期43卷 150-163页

依靠算法提高光学测量精度的方法和应用越来越广泛,由于刀口法在光学非球面检测中的应用有其独特性,本文提出了在非焦点处采样,对应CCD像面上辅以虚拟光阑调制的刀口法环带,实现定量检测。以检测一个凹球面为例,将其与干涉仪标准方法的... 详细信息

依靠算法提高光学测量精度的方法和应用越来越广泛,由于刀口法在光学非球面检测中的应用有其独特性,本文提出了在非焦点处采样,对应CCD像面上辅以虚拟光阑调制的刀口法环带,实现定量检测。以检测一个凹球面为例,将其与干涉仪标准方法的检测结果进行对比,其中主要环带位置偏差不超过1%,峰谷(PV)值和均方根(RMS)值误差均在7%左右,可以实现至少λ/15左右的检测灵敏度。该研究为光学车间检测提供了一种定量化检测的新思路,优化了光学加工与检测的效率,为自动化刀口仪的研制奠定了基础。

关键词：光学检测刀口仪自动化光学仪器

Approximations to Isentropic Planar Magneto-Hydrodynamics Equations by Relaxed Euler-Type Systems

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Chinese Annals of Mathematics,Series B 2024年第3期45卷 413-440页

作者： Yachun LI zhaoyang SHANG Chenmu WANG Liang ZHAO School of Mathematical Sciences CMA-ShanghaiMOE-LSC and SHL-MACShanghai Jiao Tong UniversityShanghai 200240China School of Finance Shanghai Lixin University of Accounting and FinanceShanghai 201209China School of Mathematical Sciences Shanghai Jiao Tong UniversityShanghai 200240China School of Mathematical Sciences Harbin Engineering UniversityHarbin 150001China Mathematical Modelling&Data Analytics Center Oxford Suzhou Centre for Advanced ResearchSuzhou 215123JiangsuChina

In this paper, the authors consider an approximation to the isentropic planar Magneto-hydrodynamics(MHD for short) equations by a kind of relaxed Euler-type system. The approximation is based on the generalization of the Maxwell law for nonNewtonian fluids together with the Maxwell correction for the Ampe`re law, hence the approximate system becomes a first-order quasilinear symmetrizable hyperbolic systems with partial dissipation. They establish the global-in-time smooth solutions to the approximate Euler-type equations in a small neighbourhood of constant equilibrium states and obtain the global-in-time convergence towards the isentropic planar MHD equations. In addition, they also establish the global-in-time error estimates of the limit based on stream function techniques and energy estimates for error variables.

关键词： Planar MHD equations Relaxation limits Global convergence Stream function

Comparative Study of 3D-Printed Porous Titanium Alloy with Rod Designs of Three Different Geometric Structures for Orthopaedic Implantation

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 54-66页

作者： Jiaxin Li Haozhang Zhong Bojun Cao zhaoyang Ran Jia Tan Liang Deng Yongqiang Hao Jinglong Yan Department of Orthopedics The Second Affiliated Hospital of Harbin Medical UniversityHarbin150001China Shanghai Engineering Research Center of Innovative Orthopaedic Instruments and Personalized Medicine Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai200011China Institute of Materials Modification and Modeling Shanghai Jiao Tong UniversityShanghai200240China

Porous titanium alloy is currently widely used in clinical treatment of orthopaedic diseases for its lower elastic modulus and ability to integrate with bone *** the micro-level,cells can respond to different geometries,and at the macro-level,the geometric design of implants will also affect the biological function of *** this study,three kinds of porous scaffolds with square,triangular and circle rod shapes were designed and 3D *** study observed the proliferation and differentiation of MC3T3-E1 cells during surface culture of the three types of *** also evaluated the characteristics of the three scaffolds by means of compression tests and scanning electron microscopy to provide a reference for the design of porous titanium alloy implants for clinical *** trends of cell proliferation and gene expression between the three types of scaffolds were observed after treatment with two *** results show that the square rod porous scaffolds have the best proliferative and osteogenic activities,and these findings may be due to differences in piezo-type mechanosensitive ion channel component 1(Piezo1)and Yes-associated protein(YAP)expression caused by the macro-geometric topography.

关键词： Porous titanium scaffolds Geometric morphology Cell proliferation Structural design

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汉代生育禁忌习俗中的性别与权力

河南师范大学学报（哲学社会科学版） 2024年第2期51卷 108-113页

作者：孙朝阳焦杰陕西师范大学历史文化学院陕西西安710119

两汉社会出现了比先秦时期更为严苛的生育禁忌,人们普遍认为产妇不洁且危险,产孕异常、忌日出生的婴儿会妨害父母。因此,承担生育重任的产妇和某些“特殊婴儿”被当作禁忌对象,产妇在分娩之前必须离开日常生活的居所,到特定地点分娩,产... 详细信息

两汉社会出现了比先秦时期更为严苛的生育禁忌,人们普遍认为产妇不洁且危险,产孕异常、忌日出生的婴儿会妨害父母。因此,承担生育重任的产妇和某些“特殊婴儿”被当作禁忌对象,产妇在分娩之前必须离开日常生活的居所,到特定地点分娩,产孕异常、忌日出生的新生儿也会被弃之不育。两汉社会流行的生育禁忌观念,不仅是对产妇不洁和“特殊婴儿”妨害父母的担忧,背后还隐藏着更为深层的性别与权力关系。汉代父权制文化深入发展,丈夫在家庭中的权力不断增长,夫权不断强化,针对产妇和婴儿的一系列生育禁忌实则是权力压迫和性别歧视在家庭关系中渗透的结果。

关键词：汉代社会生育禁忌驱逐产妇生子不举性别与权力

Status and development of high-power laser facilities at the NLHPLP

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High Power Laser Science and Engineering 2018年第4期6卷 21-43页

作者： Jianqiang Zhu Jian Zhu Xuechun Li Baoqiang Zhu Weixin Ma Xingqiang Lu Wei Fan Zhigang Liu Shenlei Zhou Guang Xu Guowen Zhang Xinglong Xie Lin Yang Jiangfeng Wang Xiaoping Ouyang Li Wang Dawei Li Pengqian Yang Quantang Fan Mingying Sun Chong Liu Dean Liu Yanli Zhang Hua Tao Meizhi Sun Ping Zhu Bingyan Wang zhaoyang jiao Lei Ren Daizhong Liu Xiang jiao Hongbiao Huang Zunqi Lin National Laboratory on High Power Laser and Physics Shanghai 201800China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Shanghai Institute of Laser Plasma Chinese Academy of Engineering and PhysicsShanghai 201800China

In this paper, we review the status of the multifunctional experimental platform at the National Laboratory of High Power Laser and Physics(NLHPLP). The platform, including the SG-II laser facility, SG-II 9th beam, SG-II upgrade(SG-II UP) facility, and SG-II 5 PW facility, is operational and available for interested scientists studying inertial confinement fusion(ICF) and a broad range of high-energy-density physics. These facilities can provide important experimental capabilities by combining different pulse widths of nanosecond, picosecond, and femtosecond scales. In addition, the SG-II UP facility, consisting of a single petawatt system and an eight-beam nanosecond system, is introduced including several laser technologies that have been developed to ensure the performance of the facility. Recent developments of the SG-II 5 PW facility are also presented.

关键词： high-power laser facility inertial confinement fusion solid-state amplifier