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Complex transmission matrix retrieval for a highly scattering medium via regional phase differentiation

Photonics Research 2024年第5期12卷 876-883页

作者： QIAOZHI HE RONGJUN SHAO YUAN Qu LINXIAN LIU CHUNXU DING jiamiao yang School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China School of Automation and Software Engineering Shanxi UniversityTaiyuan 030006China

Accurately measuring the complex transmission matrix(CTM) of the scattering medium(SM) holds critical significance for applications in anti-scattering optical imaging, phototherapy, and optical neural networks. Noninterferometric approaches, utilizing phase retrieval algorithms, can robustly extract the CTM from the speckle patterns formed by multiple probing fields traversing the SM. However, in cases where an amplitude-type spatial light modulator is employed for probing field modulation, the absence of phase control frequently results in the convergence towards a local optimum, undermining the measurement accuracy. Here, we propose a high-accuracy CTM retrieval(CTMR) approach based on regional phase differentiation(RPD). It incorporates a sequence of additional phase masks into the probing fields, imposing a priori constraints on the phase retrieval algorithms. By distinguishing the variance of speckle patterns produced by different phase masks, the RPD-CTMR can effectively direct the algorithm towards a solution that closely approximates the CTM of the SM. We built a prototype of a digital micromirror device modulated RPD-CTMR. By accurately measuring the CTM of diffusers, we achieved an enhancement in the peak-to-background ratio of anti-scattering focusing by a factor of 3.6, alongside a reduction in the bit error rate of anti-scattering image transmission by a factor of 24. Our proposed approach aims to facilitate precise modulation of scattered optical fields, thereby fostering advancements in diverse fields including high-resolution microscopy, biomedical optical imaging, and optical communications.

关键词： matrix phase holds

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Full-polarization angular spectrum modeling of scattered light modulation

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Photonics Research 2024年第3期12卷 485-490页

作者： RONGJUN SHAO CHUNXU DING YUAN QU LINXIAN LIU QIAOZHI HE YUEJUN WU jiamiao yang School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of Marine Equipment Shanghai Jiao Tong UniversityShanghai 200240China School of Automation and Software Engineering Shanxi UniversityTaiyuan 030006China

The exact physical modeling for scattered light modulation is critical in phototherapy,biomedical imaging,and free-space optical *** particular,the angular spectrum modeling of scattered light has attracted considerable attention,but the existing angular spectrum models neglect the polarization of photons,degrading their ***,we propose a full-polarization angular spectrum model(fpASM)to take the polarization into *** model involves a combination of the optical field changes and free-space angular spectrum diffraction,and enables an investigation of the influence of polarization-related factors on the performance of scattered light *** establishing the relationship between various model parameters and macroscopic scattering properties,our model can effectively characterize various depolarization *** a demonstration,we apply the model in the time-reversal data transmission and anti-scattering light *** method allows the analysis of various depolarization scattering events and benefits applications related to scattered light modulation.

关键词： scattered angular spectrum

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To Blame or Not?Modulating Third-Party Punishment with the Framing Effect

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Neuroscience Bulletin 2022年第5期38卷 533-547页

作者： jiamiao yang Ruolei Gu Jie Liu Kexin Deng Xiaoxuan Huang Yue-Jia Luo Fang Cui School of Psychology Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Affective and Social Neuroscience Magnetic Resonance Imaging CenterCenter for Brain Disorders and Cognitive SciencesShenzhen UniversityShenzhen 518060China CAS Key Laboratory of Behavioral Science Institute of PsychologyChinese Academy of SciencesBeijing 100101China Department of Psychology University of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Applied Experimental Psychology Faculty of PsychologyBeijing Normal UniversityBeijing 100875China

People as third-party observers,without direct self-interest,may punish norm violators to maintain social ***,third-party judgment and the follow-up punishment might be susceptible to the way we frame(i.e.,verbally describe)a norm *** conducted a behavioral and a neuroimaging experiment to investigate the above phenomenon,which we call the“third-party framing effect”.In these experiments,participants observed an anonymous perpetrator deciding whether to keep her/his economic benefit while exposing a victim to a risk of physical pain(described as“harming others”in one condition and“not helping others”in the other condition),then they had a chance to punish that perpetrator at their own *** results showed that the participants were more willing to execute third-party punishment under the harm frame compared to the help frame,manifesting a framing ***-reported anger toward perpetrators mediated the relationship between empathy toward victims and the framing ***,activation of the insula mediated the relationship between mid-cingulate cortex activation and the framing effect;the functional connectivity between these regions significantly predicted the size of the framing *** findings shed light on the psychological and neural mechanisms of the third-party framing effect.

关键词： Framing effect Third-party punishment Functional magnetic resonance imaging Mid-cingulate cortex Insula

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Chiral boryl radical catalyzed asymmetric radical cycloisomerization

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Science China Chemistry 2024年第7期67卷 2121-2123页

作者： jiamiao Jin Shi-Chao Ren Yonggui Robin Chi National Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China School of Chemistry Chemical Engineeringand BiotechnologyNanyang Technological UniversitySingapore 637371Singapore

Asymmetric catalytic organic synthesis is of profound importance in modern research and industries,providing optically enriched molecules with diverse structures and functions[1].Enzymes,transition metal complexes,and simple organic molecules have all been found as powerful catalysts that enable the bond breaking and forming events with excellent control over stereo-selectivity *** the realm of designed small molecule organic catalysts.

关键词： radical catalyzed asymmetric

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Anti-scattering light focusing by fast wavefront shaping based on multi-pixel encoded digital-micromirror device

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Light(Science & Applications) 2021年第8期10卷 1527-1535页

作者： jiamiao yang Qiaozhi He Linxian Liu Yuan Qu Rongjun Shao Bowen Song Yanyu Zhao Department of Instrument Science and Engineering School of Electronic Information and Electrical EngineeringShanghai Jiao Tong University200240 ShanghaiChina. Shanghai Center for Brain Science and Brain-Inspired Technology 200031 ShanghaiChina. School of Automation and Software Engineering Shanxi University030006 TaiyuanChina. Beijing Advanced Innovation Center for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Engineering MedicineBeihang University100191 BeijingChina

Speed and enhancement are the two most important metrics for anti-scattering light focusing by wavefront shaping(WS),which requires a spatial light modulator with a large number of modulation modes and a fast speed of *** the commercial modulators,the digital-micromirror device(DMD)is the sole solution providing millions of modulation modes and a pattern rate higher than 20 ***,it has the potential to accelerate the process of anti-scattering light focusing with a high ***,modulating light in a binary mode by the DMD restricts both the speed and enhancement ***,we propose a multi-pixel encoded DMD-based WS method by combining multiple micromirrors into a single modulation unit to overcome the drawbacks of binary *** addition,to efficiently optimize the wavefront,we adopted separable natural evolution strategies(SNES),which could carry out a global search against a noisy *** with the state-of-the-art DMD-based WS method,the proposed method increased the speed of optimization and enhancement of focus by a factor of 179 and 16,*** our demonstration,we achieved 10 foci with homogeneous brightness at a high speed and formed W-and S-shape patterns against the scattering *** experimental results suggest that the proposed method will pave a new avenue for WS in the applications of biomedical imaging,photon therapy,optogenetics,dynamic holographic display,etc.

关键词： mirror light overcome

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Growth kinetics of titanium carbide coating by molten salt synthesis process on graphite sheet surface

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1858-1864页

作者： Xiaoyu Shi Chongxiao Guo jiamiao Ni Songsong Yao Liqiang Wang Yue Liu Tongxiang Fan State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The synthesis of carbide coatings on graphite substrates using molten salt synthesis(MSS),has garnered significant interest due to its cost-effective *** study investigates the reaction process and growth kinetics involved in MSS,shedding light on key aspects of the *** involvement of Ti powder through liquid-phase mass transfer is revealed,where the diffusion distance and quantity of Ti powder play a crucial role in determining the reaction rate by influencing the C content gradient on both sides of the ***,the growth kinetics of the carbide coating are predominantly governed by the diffusion behavior of C within the carbide layer,rather than the chemical reaction *** analyze the kinetics,the thickness of the carbide layer is measured with respect to heat treatment time and temperature,unveiling a parabolic relationship within the temperature range of 700-1300℃.The estimated activation energy for the reaction is determined to be 179283 J·mol^(-1).These findings offer valuable insights into the synthesis of carbide coatings via MSS,facilitating their optimization and enhancing our understanding of their growth mechanisms and properties for various applications.

关键词： titanium carbide graphite molten salt kinetic analysis

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右侧颞顶联合区及道德加工脑网络的功能连接预测社会性框架效应:来自静息态功能磁共振的证据

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心理学报 2021年第1期53卷 55-66页

作者：崔芳杨佳苗古若雷刘洁深圳大学心理学院深圳大学脑疾病与认知科学研究中心深圳518060 中国科学院心理研究所行为科学重点实验室北京100101 中国科学院大学心理学系北京100049

社会性框架效应指个体进行社会性决策时,描述方式(即框架)对其选择倾向的影响。采用“伤害/帮助框架”范式,本研究在行为上发现了显著的框架效应:被试在伤害框架下比帮助框架下,更倾向于选择利他选项,这可能是由于伤害框架凸显了伤害他... 详细信息

社会性框架效应指个体进行社会性决策时,描述方式(即框架)对其选择倾向的影响。采用“伤害/帮助框架”范式,本研究在行为上发现了显著的框架效应:被试在伤害框架下比帮助框架下,更倾向于选择利他选项,这可能是由于伤害框架凸显了伤害他人的后果及有意性,从而提高了道德冲突水平。在神经活动上发现(1)静息态下,右侧颞顶联合区(TPJ)的低频振荡振幅(ALFF)与框架效应强度存在显著正相关;(2)道德加工相关脑区构成的局部脑网络内部的功能连接强度(FC)能够有效预测框架效应强度。本研究首次利用静息态功能连接探讨个体的社会性决策受到语言表述方式影响的神经机制,为进一步揭示社会决策中的个体差异提供了神经学证据。

关键词：社会性框架效应静息态功能磁共振功能连接右侧颞顶联合区道德脑网络

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基于Citespace的光动力杀菌技术研究进展可视化分析

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食品工业科技 2024年第10期45卷 335-352页

作者：施源李璟胡嘉淼林少玲福建农林大学食品科学学院福建福州350002 农业农村部食用菌加工及综合利用技术集成科研基地福建福州350002

为及时了解国内外对光动力杀菌的研究现状、热点和发展趋势,为相关研究领域的研究者提供参考,本文采用文献计量学方法对Web of Science核心数据库中收录的2002~2022年光动力杀菌相关研究文献进行统计分析。同时,结合可视化分析软件Cites... 详细信息

为及时了解国内外对光动力杀菌的研究现状、热点和发展趋势,为相关研究领域的研究者提供参考,本文采用文献计量学方法对Web of Science核心数据库中收录的2002~2022年光动力杀菌相关研究文献进行统计分析。同时,结合可视化分析软件Citespace对不同国家和地区、机构、作者等进行分析,并对光动力杀菌研究的关键词进行聚类分析和突现分析。通过分析可知,在食品领域,光动力灭菌技术的研究方向主要包括光敏剂的选择和改造、光源的选择和优化以及延长食品货架期等;此外,光动力联合其他冷灭菌技术增强灭菌效果也将成为未来光动力在食品领域的一个研究趋势。

关键词：文献计量学可视化分析软件Citespace 光动力杀菌技术光敏技术光动力疗法

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金属催化辅助无转移石墨烯薄膜制备技术研究进展

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材料导报 2024年第15期38卷 184-198页

作者：黄勇郭冲霄倪佳苗刘悦范同祥上海交通大学材料科学与工程学院金属基复合材料国家重点实验室上海200240

作为一种原子级别厚度的二维碳材料,石墨烯已经被证明具有优异的电学、光学、热学等综合物化性能。但是如何制备高质量、大面积晶圆级别的石墨烯薄膜仍然是激发人们进行科学研究以及器件集成领域的一大热点问题。传统过渡金属催化合成... 详细信息

作为一种原子级别厚度的二维碳材料,石墨烯已经被证明具有优异的电学、光学、热学等综合物化性能。但是如何制备高质量、大面积晶圆级别的石墨烯薄膜仍然是激发人们进行科学研究以及器件集成领域的一大热点问题。传统过渡金属催化合成石墨烯薄膜的化学气相沉积工艺往往需要复杂费时的后处理转移工序,会对石墨烯薄膜本征性能造成巨大破坏,因此研究如何在介电基底上直接制备高质量大面积的石墨烯薄膜具有重大意义。基于此目的而兴起的无转移石墨烯薄膜制备研究已经取得了显著的科学成就,其中金属催化辅助合成无转移石墨烯薄膜的研究尤其引人注目,并且基于原位合成石墨烯薄膜性能测试及器件验证均取得了不错的效果。尽管如此,由于催化剂种类、形态以及结构设计等因素的不同,针对金属催化剂在无转移石墨烯薄膜合成过程中的工艺策略,不同的研究有不同的设计。本文基于无转移石墨烯薄膜制备的最新研究结果,对金属在催化转化获得无转移石墨烯过程中的作用机理和设计策略进行了系统全面的分析,对促进高质量晶圆级石墨烯薄膜的合成及在电子、光电子等功能器件领域的应用具有重要的指导意义。

关键词：石墨烯薄膜无转移制备技术金属催化剂介电基底

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恩格列净对老年2型糖尿病患者骨代谢和骨密度的影响

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老年医学与保健 2023年第1期29卷 86-90页

作者：王妍杨玲杨佳苗刘连勇郑超上海市浦东新区浦南医院内分泌科上海200125

目的探索恩格列净对老年2型糖尿病(T2DM)患者除了糖代谢方面,是否对骨代谢也有额外的风险,为伴随高骨折风险的T2DM患者的降糖方案提供循证依据。方法选取自2020年1月—2021年12月浦南医院内分泌科诊疗的T2DM患者,随机分为干预组(恩格列... 详细信息

目的探索恩格列净对老年2型糖尿病(T2DM)患者除了糖代谢方面,是否对骨代谢也有额外的风险,为伴随高骨折风险的T2DM患者的降糖方案提供循证依据。方法选取自2020年1月—2021年12月浦南医院内分泌科诊疗的T2DM患者,随机分为干预组(恩格列净组)及对照组(维持原来的内分泌降糖治疗)2组,收集2组患者的一般情况、血糖、骨密度及骨代谢指标资料,分析T2DM患者应用恩格列净后骨形成指标、骨吸收指标及骨密度水平的变化情况。结果与对照组相比,恩格列净组患者的体质量、体质量指数(BMI)显著低于对照组(P<0.05),血糖指标2组呈相似水平,无显著统计学差异。2组患者骨密度及骨代谢指标均差异无统计学意义。结论T2DM患者应用恩格列净可显著降低体质量及BMI,对骨代谢指标及骨密度无明显影响。

关键词：老年 2型糖尿病恩格列净骨代谢骨密度

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