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Surface roughness classification using light scattering matrix and deep learning

Science China(Technological Sciences) 2024年第2期67卷 520-535页

作者： SUN Hao tan wei RUAN YiXiao BAI Long XU JianFeng State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan Digital Design and Manufacturing Innovation Center Co. LtdWuhan 430074China

High-quality optical components have been widely used in various applications;thus,extremely high beam quality is ***,surface roughness is a key indicator of the surface *** this study,the angular distribution of light scattering field intensity was obtained for surfaces having different roughness profiles based on the finite difference time domain(FDTD)method,and the results were compared with those obtained using the generalized Harvey-Shack(GHS)*** was shown that the FDTD approach can be used for an accurate simulation of the scattered field of a rough surface,and the superposition of results obtained from many surfaces that have the same roughness level was in good agreement with the result given by the analytic GHS model.A light scattering matrix(LSM)method was proposed based on the FDTD simulation results that could obtain rich surface roughness *** classification effect of LSM was compared with that of the single-incidence scattering distribution(SISD)based on a ResNet-50 deep learning *** classification accuracy of the model trained with the LSM dataset was obtained as 95.74%,which was 23.40%higher than that trained using the SISD ***,the effects of different noise types and filtering methods on the classification performance were analyzed,and the LSM was also shown to improve the robustness and generalizability of the trained surface roughness ***,the proposed LSM method has important implications for improving the data acquisition scheme of current light scattering measurement systems,and it also has the potential to be used for detection and characterization of surface defects of optical components.

关键词： surface roughness FDTD simulation GHS theory deep learning light scattering matrix

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Rotating Massive Strangeon Stars and X-Ray Plateau of Short GRBs

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Research in Astronomy and Astrophysics 2024年第3期24卷 47-57页

作者： Xi-Yan Yang Xiao-Yu Lai wei-wei tan Ren-Xin Xu School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China Research Center for Astronomy Hubei University of EducationWuhan 4300205China Key Laboratory of Quark and Lepton Physics Central China Normal UniversityMinistry of EducationWuhan 430079China School of Physics Peking UniversityBeijing 100871China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China

Strangeon stars,which are proposed to describe the nature of pulsar-like compact stars,have passed various observational *** maximum mass of a non-rotating strangeon star could be high,which implies that the remnants of binary strangeon star mergers could even be long-lived massive strangeon *** study rigidly rotating strangeon stars in the slowly rotating approximation,using the Lennard-Jones model for the equation of *** can significantly increase the maximum mass of strangeon stars with unchanged baryon numbers,enlarging the mass-range of long-lived strangeon *** spin-down after merger,the decrease of radius of the remnant will lead to the release of gravitational *** into account the efficiency of converting the gravitational energy luminosity to the observed X-ray luminosity,we find that the gravitational energy could provide an alternative energy source for the plateau emission of X-ray *** fitting results of X-ray plateau emission of some short gamma-ray bursts suggest that the magnetic dipole field strength of the remnants can be much smaller than that of expected when the plateau emission is powered only by spin-down luminosity of magnetars.

关键词： dense matter-(stars) pulsars general-(stars) gamma-ray burst general

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Apically guiding electron/mass transfer reaction induced by Ag/FeN_(x)Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries

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Journal of Energy Chemistry 2024年第8期95卷 106-116,I0004页

作者： Kaixiang Shi Kaixin Wang Tong Li Junhao Li Jie Ren Xu Li Yonggang Min Zhouguang Lu wei tan Quanbing Liu Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center(Rongjiang Laboratory) Guangdong University of TechnologyJieyang 515200GuangdongChina Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province School of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158HainanChina School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006GuangdongChina Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina

The disparity in the transfer of carriers(electrons/mass)during the reaction in zinc-air batteries(ZABs)results in sluggish kinetics of the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),along with elevated overpotentials,thereby imposing additional constraints on its ***,the pre-design and target-development of inexpensive,high-performance,and long-term stable bifunctional catalysts are urgently *** this work,an apically guiding dual-functional electrocatalyst(Ag-FeN_(x)-N-C)was prepared,in which a hierarchical porous nitrogen-doped carbon with three-dimensional(3D)hollow star-shaped structure is used as a substrate and high-conductivity Ag nanoparticles are coupled with iron nitride(FeN_(x))*** calculations indicate that the Mott-Schottky heterojunction as an inherent electric field comes from the two-phase bound of Ag and FeN_(x),of which electron accumulation in the FeN_(x)phase region and electron depletion in the Ag phase region promote orientated-guiding charge *** effective modulation of local electronic structures felicitously reforms the d-band electron-group distribution,and intellectually tunes the masstransfer reaction energy barriers for both ORR/***,the hollow star-s haped hierarchical porous structure provides an apical region for fast mass *** results show that the halfwave potential for ORR is 0.914 V,and the overpotential for OER is only 327 mV at 10 mA cm^(-2).A rechargeable ZAB with Ag-FeN_(x)-N-C as the air cathode demonstrates long-term cycling performance exceeding 1500 cycles(500 h),with a power density of 180 mW cm^(-2).Moreover,when employing AgFeN_(x)-N-C as the air cathode,flexible ZABs demonstrate a notable open-circuit voltage of 1.42 V and achieve a maximum power density of 65.6 mW cm^(-2).Ag-FeN_(x)-N-C shows guiding electron/mass transfer route and apical reaction microenvironment for the electrocatalyst architecture in the explo

关键词： Hollow star structure Mott-Schottky effect Apically guiding effect Bifunctional catalysis Zinc-air batteries

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Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang Zeng wei tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen wei Yufei Mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

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Application of real-time shear wave elastography to Achilles tendon hardness evaluation in older adults

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World Journal of Clinical Cases 2024年第26期12卷 5922-5929页

作者： Xuan He Xin wei Jia Hou wei tan Ping Luo Department of Functional Examination Sichuan Province Orthopedic HospitalChengdu 610041Sichuan ProvinceChina

BACKGROUND Real-time shear wave elastography(SWE)is a non-invasive imaging technique used to measure tissue stiffness by generating and tracking shear waves in real *** advanced ultrasound-based method provides quantitative information regarding tissue elasticity,offering valuable insights into the mechanical properties of biological ***,the application of real-time SWE in the musculoskeletal system and sports medicine has not been extensively *** To explore the practical value of real-time SWE for assessing Achilles tendon hardness in older *** A total of 60 participants were enrolled in the present study,and differences in the elastic moduli of the bilateral Achilles tendons were compared among the following categories:(1)Age:55-60,60-65,and 65-70-years-old;(2)Sex:Male and female;(3)Laterality:Left and right sides;(4)Tendon state:Relaxed and tense state;and(5)Tendon segment:Proximal,middle,and *** There were no significant differences in the elastic moduli of the bilateral Achilles tendons when comparing by age or sex(P>0.05).There were,however,significant differences when comparing by tendon side,state,or segment(P<0.05).CONCLUSION Real-time SWE plays a significant role compared to other examination methods in the evaluation of Achilles tendon hardness in older adults.

关键词： Aged Achilles tendon Real-time Shear wave elastography Young’s modulus Muscle stiffness

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基于虚像相位阵列的光谱检测中角色散均匀性的研究

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光谱学与光谱分析 2024年第7期44卷 1827-1834页

作者：纪文杰谭中伟北京交通大学电子信息工程学院光波技术研究所北京100044

随着光谱学的不断发展,光谱检测作为一种快速无损的检测手段逐渐被应用于越来越多的领域中。而随着对信息精度要求的不断提高,如何得到高分辨率和低波长误差的光谱信息,是设计光谱检测系统时必须解决的问题。传统的色散元件如衍射光栅,... 详细信息

随着光谱学的不断发展,光谱检测作为一种快速无损的检测手段逐渐被应用于越来越多的领域中。而随着对信息精度要求的不断提高,如何得到高分辨率和低波长误差的光谱信息,是设计光谱检测系统时必须解决的问题。传统的色散元件如衍射光栅,虽然有较大的波长响应范围,但是通常只能提供nm量级的分辨率而无法满足当下的高光谱分辨率的要求。虚像相位阵列(VIPA)具有大角度色散特性,可以有效提高系统的光谱分辨率,因而近年来不断被用于精细光谱检测的研究。但其波长和色散角度对应关系存在非线性,而且同一波长易产生多个衍射级次的光斑,从而造成额外的光能损失。因此,本文主要基于VIPA的交叉色散光路就如何降低VIPA色散的非均匀性的问题进行了理论分析和实验验证。首先基于傍轴理论的色散定律展开理论分析探讨了入射光腰尺寸、入射角度等参数对于VIPA色散的非线性程度和衍射级次数量的影响。然后通过进行仿真记录了宽光谱光源在不同VIPA倾斜角度条件下各波长衍射级次的数量,以及各波长对应的光斑质心的坐标值。计算各情况下的质心坐标与拟合曲线之间的距离均差,比较了不同角度条件下线性度的好坏。最后根据理论分析和仿真实验的结果进行实验。实验中记录了VIPA的交叉色散光路在不同的VIPA倾斜条件下出现的衍射级次数量,并利用一个波长可变的激光器得到了不同波长的光源在VIPA倾斜2°的实验条件下各衍射级次光斑的质心坐标。同样通过计算不同衍射级次光斑的质心与拟合曲线之间的距离均差分析不同衍射级次的线性度好坏。实验证明通过控制入射光束参数,可以一定程度上降低VIPA色散的非均匀性。VIPA倾斜角度越大且越靠近探测器中央位置的衍射级次线性度越好。

关键词：虚像相位阵列光谱检测线性度衍射级次

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数字赋能边境安全精细化管理的过程机理和实践路径

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广西民族研究 2024年第1期 9-18页

作者：胡佳谭薇广西民族大学政治与公共管理学院广西南宁530006

“维护公共安全体系,要从最基础的地方做起。”边疆民族地区是国家公共安全治理体系的重要组成部分。在总体国家安全观视阈下,基于广西边境安全管理实践案例可见,数字赋能边境安全精细化管理要从决策依据、治理架构、机制运行、治理效... 详细信息

“维护公共安全体系,要从最基础的地方做起。”边疆民族地区是国家公共安全治理体系的重要组成部分。在总体国家安全观视阈下,基于广西边境安全管理实践案例可见,数字赋能边境安全精细化管理要从决策依据、治理架构、机制运行、治理效能等维度出发,从精准规划、精心搭台、精细引导、精确识别等方面实现边境安全精细化管理过程,塑造边境安全的源头治理、精准治理、开放治理、系统治理等模式。应围绕数字基础设施、数据壁垒、信息安全保障等阻滞因素,以铸牢中华民族共同体意识为主线、信息化基础设施健全、多元主体协同、安全风险消弭等方面完善边境安全精细化管理体系。

关键词：边境安全数字赋能精细化管理

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建立我国税收事先裁定制度的路径初探

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税务研究 2024年第5期 134-139页

作者：谭伟张文山东社会科学院财政金融研究所

税收不确定性的必然性和减少税收不确定性的必要性,共同构成了税收事先裁定等税收确定性工具存在的基础。多地已经开展了税收事先裁定的试点探索,但我国目前尚未在法律上建立税收事先裁定制度,各地对案件进行裁定时缺乏统一标准。本文... 详细信息

税收不确定性的必然性和减少税收不确定性的必要性,共同构成了税收事先裁定等税收确定性工具存在的基础。多地已经开展了税收事先裁定的试点探索,但我国目前尚未在法律上建立税收事先裁定制度,各地对案件进行裁定时缺乏统一标准。本文认为可在界定税收事先裁定的性质与实施边界的基础上,从采用行政模式、定位于具体行政行为,予以立法明确、“绑定”税法行政解释,实行集中管理、对外公开裁定结果,先提供免费的纳税服务、再收取一定费用等方面着手,探寻建立税收事先裁定制度的合适路径。

关键词：税收事先裁定税收不确定性税收确定性纳税服务

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清淤泥浆脱水-固化一体化工艺效果和机制研究

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岩土力学 2024年第2期45卷 443-453页

作者：林小蔚侯豪刘环季浪谈正伟朱伟河海大学岩土力学与堤坝工程教育部重点实验室江苏南京210098 河海大学土木与交通学院江苏南京210098 河海大学环境学院江苏南京210098

疏浚工程中清淤泥浆的含水率通常非常高,常采用先脱水为泥饼再进行固化的方法,处理效率相对较低。为此选择普通硅酸盐水泥和硫铝酸盐水泥作为固化材料,结合絮凝材料和板框压滤技术,对太湖清淤泥浆进行脱水-固化一体化工艺研究。通过比... 详细信息

疏浚工程中清淤泥浆的含水率通常非常高,常采用先脱水为泥饼再进行固化的方法,处理效率相对较低。为此选择普通硅酸盐水泥和硫铝酸盐水泥作为固化材料,结合絮凝材料和板框压滤技术,对太湖清淤泥浆进行脱水-固化一体化工艺研究。通过比阻试验和固化试验等手段,分析了该工艺中泥浆的脱水性能、固化效果的变化规律以及固化材料的损失情况。此外,还基于一体化工艺试验中泥浆的基本性质变化,讨论了固化材料流失的途径以及对泥浆脱水性能的影响机制。研究结果表明,采用脱水-固化一体化工艺能够改善清淤泥浆的粒径、压缩性,从而提高脱水特性,并且在工艺过程中固化材料的流失在9%以内,由于脱水泥饼性质更好,后续同样能够实现良好的固化效果。实际工程应用中,采用脱水固化一体化工艺可以提升泥浆处理的效率。

关键词：清淤泥浆脱水固化泥处理泥利用

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邦纳综合征研究进展

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国际眼科杂志 2024年第5期24卷 723-726页

作者：杜君玥谭薇遵义医科大学第三附属医院遵义市第一人民医院贵州省遵义市563000

邦纳综合征(CBS)描述了在没有神经精神障碍的人群中,由于视觉通路损害而出现的幻视。CBS患者通常能洞察到幻觉不是真实的,该病可能是偶发性的、周期性的或者慢性的。由于CBS缺乏统一的诊断标准,加上部分患者对承认幻视存在顾虑,该病的... 详细信息

邦纳综合征(CBS)描述了在没有神经精神障碍的人群中,由于视觉通路损害而出现的幻视。CBS患者通常能洞察到幻觉不是真实的,该病可能是偶发性的、周期性的或者慢性的。由于CBS缺乏统一的诊断标准,加上部分患者对承认幻视存在顾虑,该病的患病率存在差异,从0.4%到30%不等。大量研究表明CBS可能与许多眼部疾病有关,如年龄相关性黄斑变性、青光眼等。除此之外,也有继发于眼科手术或药物治疗的CBS相关报道,因此临床医生应提高对该病的重视,及时诊断并缓解患者情绪。目前有关CBS的眼科学文献资料较少,有必要对其进行总结分析,以探讨其发病机制和诊疗方案。本文就以近年来一些与CBS有关的研究做一综述。

关键词：邦纳综合征幻视年龄相关性黄斑变性青光眼发病机制诊疗进展

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