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Transient stimulated Raman scattering spectroscopy and imaging

Light(Science & Applications) 2024年第4期13卷 654-663页

作者： qiaozhi.yu Zhengjian Yao Jiaqi Zhou Wenhao yu Chenjie Zhuang Yafeng Qi Hanqing Xiong National Biomedical Imaging Center College of Future TechnologyPeking UniversityBeijing 100871China Biomedical Engineering Department College of Future TechnologyPeking UniversityBeijing 100871China

Stimulated Raman scattering(SRS)has been developed as an essential quantitative contrast for chemical imaging in recent ***,while spectral lines near the natural linewidth limit can be routinely achieved by state-of-the-art spontaneous Raman microscopes,spectral broadening is inevitable for current mainstream SRS imaging *** is because those SRS signals are all measured in the frequency *** is a compromise between sensitivity and spectral resolution:as the nonlinear process benefits from pulsed excitations,the fundamental time-energy uncertainty limits the spectral ***,the spectral range and acquisition speed are mutually *** we report transient stimulated Raman scattering(T-SRS),an alternative time-domain strategy that bypasses all these fundamental conjugations.T-SRS is achieved by quantum coherence manipulation:we encode the vibrational oscillations in the stimulated Raman loss(SRL)signal by femtosecond pulse-pair sequence excited vibrational wave packet *** Raman spectrum was then achieved by Fourier transform of the time-domain SRL *** all Raman modes are impulsively and simultaneously excited,T-SRS features the natural-linewidth-limit spectral line shapes,laser-bandwidth-determined spectral range,and improved ***~150-fs laser pulses,we boost the sensitivity of typical Raman modes to the sub-mM *** all-plane-mirror high-speed time-delay scanning,we further demonstrated hyperspectral SRS imaging of live-cell metabolism and high-density multiplexed imaging with the natural-linewidth-limit spectral resolution.T-SRS shall find valuable applications for advanced Raman imaging.

关键词： scattering excited mutually

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Comparison of immune responses and intestinal flora in epicutaneously sensitized BALB/c or C57BL/6 mouse models of food allergy

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Food Science and Human Wellness 2024年第2期13卷 668-680页

作者： Gang yu yuhao Jiang Shuifeng Zhang Pengpeng Liu Shunyu Wang Huadong Sheng Yanbo Wang qiaozhi Zhang Linglin Fu Food Safety Key Laboratory of Zhejiang Province School of Food Science and BiotechnologyZhejiang Gongshang UniversityHangzhou 310018China Zhejiang Fangyuan Test Group Co. Ltd.Hangzhou 310018China Key Laboratory of Biosafety Detection for Zhejiang Market Regulation Hangzhou 310018China Zhejiang Liziyuan Food Co. LtdJinhua 321031China

Cutaneous exposure to food allergens through a disrupted skin barrier is recognized as an important cause of food allergy,and the cutaneous sensitized mouse model has been established to investigate relevant allergic ***,the role of different genetic backgrounds of mice on immune responses to food allergens upon epicutaneous sensitization is largely *** this study,two strains of mice,i.e.,the BALB/c and C57BL/6 mice,were epicutaneously sensitized with ovalbumin on atopic dermatitis(AD)-like skin lesions,followed by intragastric challenge to induce IgE-mediated food *** outcomes were measured as clinical signs,specific antibodies and cytokines,and immune cell subpopulations,as well as changes in intestinal barrier function and gut *** showed that both strains of mice exhibited typical food-allergic symptoms with a Th2-skewed *** C57BL/6 mice,rather than the BALB/c mice,were fitter for establishing an epicutaneously sensitized model of food allergy since a stronger Th2-biased response and severer disruptions in the intestinal barrier and gut homeostasis were *** study provides knowledge for selecting an appropriate mouse model to study food-allergic responses associated with AD-like skin lesions and highlights the role of genetic variations in the immune mechanism underlying pathogenesis of food allergy.

关键词： Food allergy Mouse models Epicutaneous sensitization Th2 response Gut microbiota

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

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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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Understanding the initial use stage of cement mortar lining in drinking water distribution systems:Silicon and aluminum as stability indicators

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Journal of Environmental Sciences 2024年第1期135卷 495-505页

作者： qiaozhi Liu yuan Zhuang Guiwei Li Yao Zhang Marc A.Edwards Baoyou Shi Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Civil and Environmental Engineering Virginia TechBlacksburgVA 24061USA

The cement mortar lining(CML)of commonly used ductile iron pipes can severely deteriorate the drinking water quality at the initial stage of use,but the behavioral characteristics of different elements release from the CML in this stage is still *** this study,dynamic immersion experiments with new cement mortar lined ductile iron pipe reactors were conducted under different feed water hardness and alkalinity *** results showed that the release of alkaline substances from the CML at the initial stage of use could strongly influence the pH of water,which consequently greatly impacted the release/precipitation behaviors of calcium,aluminum and *** pH and aluminum concentration of the effluent water could reach 11.5 and 700μg/L within 24 hr of hydraulic retention time,respectively,under conditions of relatively lower hardness and *** to the pH elevation,calcium carbonate precipitation could occur even at much lower feed water *** the aluminum and silicon could keep release from the CML in soluble form at different hardness and alkalinity levels,and their release rate depended on the amount of calcium carbonate ***,aluminum and silicon were more suitable as indicators of the corrosion intensity at the initial stage of CML use rather than the traditional calcium carbonate precipitation *** feed water hardness and alkalinity levels for mitigating the initial intense corrosion of CML were proposed:hardness>40 mg/L(CaCO_(3)),alkalinity>100 mg/L(CaCO_(3)).

关键词： Cement mortar lining Hardness Alkalinity Elemental release Drinking water supply

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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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Comprehensive analysis of advanced glycation end-products in commonly consumed foods:presenting a database for dietary AGEs and associated exposure assessment

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Food Science and Human Wellness 2024年第4期13卷 1917-1928页

作者： qiaozhi Zhang Huatao Li Ruixing Zheng Lili Cao Shufen Zhang Shuifeng Zhang Huadong Sheng yuhao Jiang Yanbo Wang Linglin Fu Food Safety Key Laboratory of Zhejiang Province School of Food Science and BiotechnologyZhejiang Gongshang UniversityHangzhou 310018China Ningbo Academy of Product and Food Quality Inspection(Ningbo Fibre Inspection Institute) Ningbo 315048China National Pre-packaged Food Quality Supervision and Inspection Center(Zhejiang) Zhejiang Fangyuan Test Group Co.Ltd.Hangzhou 310018China

Advanced glycation end-products(AGEs)are a group of heterogeneous compounds formed in heatprocessed foods and are proven to be detrimental to human ***,there is no comprehensive database for AGEs in foods that covers the entire range of food categories,which limits the accurate risk assessment of dietary AGEs in human *** this study,we first established an isotope dilution UHPLCQq Q-MS/MS-based method for simultaneous quantification of 10 major AGEs in *** contents of these AGEs were detected in 334 foods covering all main groups consumed in Western and Chinese populations.Nε-Carboxymethyllysine,methylglyoxal-derived hydroimidazolone isomers,and glyoxal-derived hydroimidazolone-1 are predominant AGEs found in most *** amounts of AGEs were high in processed nuts,bakery products,and certain types of cereals and meats(>150 mg/kg),while low in dairy products,vegetables,fruits,and beverages(<40 mg/kg).Assessment of estimated daily intake implied that the contribution of food groups to daily AGE intake varied a lot under different eating patterns,and selection of high-AGE foods leads to up to a 2.7-fold higher intake of AGEs through daily *** presented AGE database allows accurate assessment of dietary exposure to these glycotoxins to explore their physiological impacts on human health.

关键词： Advanced glycation end-products Maillard reaction Processed foods Dietary database Exposure assessment

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时域相干拉曼散射技术浅析(特邀)

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激光与光电子学进展 2024年第6期61卷 135-144页

作者：余乔智祁亚峰熊汗青北京大学未来技术学院国家生物医学成像科学中心北京100871

相干拉曼散射(CRS)技术作为一种重要的无标记化学成像技术,通过相干激发分子协同振动对拉曼散射信号进行增益,显著地提高了成像速度,广泛应用于材料学、生物化学、肿瘤诊断、药代动力学等领域。超快脉冲激光器的出现实现了亚皮秒持续时... 详细信息

相干拉曼散射(CRS)技术作为一种重要的无标记化学成像技术,通过相干激发分子协同振动对拉曼散射信号进行增益,显著地提高了成像速度,广泛应用于材料学、生物化学、肿瘤诊断、药代动力学等领域。超快脉冲激光器的出现实现了亚皮秒持续时间的脉冲输出,使得通过脉冲激发实现大量振动模式的同步相干激发成为新的CRS实现途径。从相干拉曼散射基本原理出发,介绍时域相干拉曼散射的主要实现途径,着重讨论时域受激拉曼散射(SRS)和时域相干反斯托克斯拉曼散射(CARS)的最新进展与应用。

关键词：拉曼光谱技术相干拉曼散射受激拉曼散射相干反斯托克斯拉曼散射时域频域

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医学图像分割的无监督域适应研究综述

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计算机工程与应用 2024年第6期60卷 10-26页

作者：呼伟徐巧枝葛湘巍于磊内蒙古师范大学计算机科学技术学院呼和浩特010022 内蒙古自治区人民医院呼和浩特010020

医学图像分割在医学图像处理领域中具有广泛的应用前景,通过定位和分割出感兴趣的器官、组织或病变区域,为诊断和治疗提供辅助信息。但不同模态医学图像之间存在域偏移问题,这会导致在实际部署时分割模型的性能大幅下降。域适应技术是... 详细信息

医学图像分割在医学图像处理领域中具有广泛的应用前景,通过定位和分割出感兴趣的器官、组织或病变区域,为诊断和治疗提供辅助信息。但不同模态医学图像之间存在域偏移问题,这会导致在实际部署时分割模型的性能大幅下降。域适应技术是解决该问题的有效途径,尤其是无监督域适应,因其不需要目标域标签信息而成为医学图像处理领域的研究热点。目前,针对医学图像分割的无监督域适应研究的综述报告相对较少,对近年医学图像分割的无监督域适应的相关研究进行了整理、分析和总结,并对未来进行了展望,希望帮助相关研究人员快速了解并熟悉该领域的研究现状及趋势。

关键词：医学图像分割域偏移域适应无监督域适应

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Linear-Quadratic Pareto Cooperative Game for Mean-Field Backward Stochastic System

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Journal of Systems Science & Complexity 2024年第3期37卷 947-964页

作者： WANG yu School of Control Science and Engineering Shandong UniversityJinan 250061China

This paper focuses on a Pareto cooperative differential game with a linear mean-field backward stochastic system and a quadratic form cost functional. Based on a weighted sum optimality method, the Pareto game is equivalently converted to an optimal control problem. In the first place,the feedback form of Pareto optimal strategy is derived by virtue of decoupling technology, which is represented by four Riccati equations, a mean-field forward stochastic differential equation(MF-FSDE),and a mean-field backward stochastic differential equation(MF-BSDE). In addition, the corresponding Pareto optimal solution is further obtained. Finally, the author solves a problem in mathematical finance to illustrate the application of the theoretical results.

关键词： Backward stochastic differential equation linear-quadratic control mean-field Pareto optimality

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Topological Stability and Entropy for Certain Set-valued Maps

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Acta Mathematica Sinica,English Series 2024年第4期40卷 962-984页

作者： yu ZHANG yu Jun ZHU School of Mathematical Sciences Xiamen UniversityXiamen 361005P.R.China

In this paper,the dynamics(including shadowing property,expansiveness,topological stability and entropy)of several types of upper semi-continuous set-valued maps are mainly considered from differentiable dynamical systems points of *** is shown that(1)if f is a hyperbolic endomorphism then for eachε>0 there exists a C^(1)-neighborhood U of f such that the induced set-valued map F_(f,U)has theε-shadowing property,and moreover,if f is an expanding endomorphism then there exists a C^(1)-neighborhood U of f such that the induced set-valued map F_(f,U)has the Lipschitz shadowing property;(2)when a set-valued map F is generated by finite expanding endomorphisms,it has the shadowing property,and moreover,if the collection of the generators has no coincidence point then F is expansive and hence is topologically stable;(3)if f is an expanding endomorphism then for eachε>0 there exists a C^(1)-neighborhood U of f such that h(F_(f,U,ε))=h(f);(4)when F is generated by finite expanding endomorphisms with no coincidence point,the entropy formula of F is ***,the dynamics of the set-valued maps based on discontinuous maps on the interval are also considered.

关键词： Set-valued map orbit space hyperbolic endomorphism perturbation shadowing expansiveness topological stability entropy

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