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EventLFM:event camera integrated Fourier light field microscopy for ultrafast 3D imaging

Light(Science & Applications) 2024年第7期13卷 1401-1415页

作者： Ruipeng Guo qianwan yang Andrew S.Chang Guorong Hu Joseph Greene Christopher V.Gabel Sixian You Lei Tian Department of Electrical and Computer Engineering Boston UniversityBostonMA 02215USA Department of Physiology and Biophysics Boston UniversityBostonMA 02215USA. Neurophotonics Center Boston UniversityBostonMA 02215USA. Research Laboratory of Electronics(RLE)in the Department of Electrical Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA. Department of Biomedical Engineering Boston UniversityBostonMA 02215USA

Ultrafast 3D imaging is indispensable for visualizing complex and dynamic biological *** scanning-based techniques necessitate an inherent trade-off between acquisition speed and space-bandwidth product(SBP).Emerging single-shot 3D wide-field techniques offer a promising alternative but are bottlenecked by the synchronous readout constraints of conventional CMOS systems,thus restricting data throughput to maintain high SBP at limited frame *** address this,we introduce EventLFM,a straightforward and cost-effective system that overcomes these challenges by integrating an event camera with Fourier light field microscopy(LFM),a state-of-theart single-shot 3D wide-field imaging *** event camera operates on a novel asynchronous readout architecture,thereby bypassing the frame rate limitations inherent to conventional CMOS *** further develop a simple and robust event-driven LFM reconstruction algorithm that can reliably reconstruct 3D dynamics from the unique spatiotemporal measurements captured by *** results demonstrate that EventLFM can robustly reconstruct fast-moving and rapidly blinking 3D fluorescent samples at kHz frame ***,we highlight EventLFM’s capability for imaging of blinking neuronal signals in scattering mouse brain tissues and 3D tracking of GFP-labeled neurons in freely moving *** believe that the combined ultrafast speed and large 3D SBP offered by EventLFM may open up new possibilities across many biomedical applications.

关键词： field linking overcome

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NeuPh:scalable and generalizable neural phase retrieval with local conditional neural fields

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Advanced Photonics Nexus 2024年第5期3卷 67-76页

作者： Hao Wang Jiabei Zhu Yunzhe Li qianwan yang Lei Tian Boston University Department of Electrical and Computer EngineeringBostonMassachusettsUnited States Boston University Department of Biomedical EngineeringBostonMassachusettsUnited States

Deep learning has transformed computational imaging,but traditional pixel-based representations limit their ability to capture continuous multiscale object *** this gap,we introduce a local conditional neural field(LCNF)framework,which leverages a continuous neural representation to provide flexible object ***’s unique capabilities are demonstrated in solving the highly ill-posed phase retrieval problem of multiplexed Fourier ptychographic *** network,termed neural phase retrieval(NeuPh),enables continuous-domain resolution-enhanced phase reconstruction,offering scalability,robustness,accuracy,and generalizability that outperform existing *** integrates a local conditional neural representation and a coordinate-based training *** show that NeuPh can accurately reconstruct high-resolution phase images from low-resolution intensity ***,NeuPh consistently applies continuous object priors and effectively eliminates various phase artifacts,demonstrating robustness even when trained on imperfect ***,NeuPh improves accuracy and generalization compared with existing deep learning *** further investigate a hybrid training strategy combining both experimental and simulated datasets,elucidating the impact of domain shift between experiment and *** work underscores the potential of the LCNF framework in solving complex large-scale inverse problems,opening up new possibilities for deep-learning-based imaging techniques.

关键词： neural representation phase retrieval computational imaging deep learning computational microscopy

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Impact of high dose Kr^+ ion irradiation on the corrosion behavior and microstructure of Zircaloy-4

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Journal of University of Science and Technology Beijing 2005年第2期12卷 178-181页

作者： qianwan XindeBai XiaoyangLiu Dept.ofEngineeringPhysics TsinghuaUniversityBeijing100084China Dept.ofMaterialsScienceandEngineering TsinghuaUniversityBeijing100084China

In order to investigate the ion irradiation effect on the corrosion behavior and microstructure of Zircaloy-4, the Zircaloy-4 film were prepared by electron beam deposition on the Zircaloy-4 specimen surface and irradiated by Kr ions using an accelerator at an energy of 300 keV with the dose from 1×1015 to 3×1016ions/cm2. The post-irradiation corrosion tests were conducted to rank the corrosion resistance of the resulting specimens by potentiodynamic polarization curve measurements in a 0.5 mol/L H2SO4 water so- lution at room temperature. Transmission electron microscopy (TEM) was employed to examine the microstructural change in the surface. The potentiodynamic tests show that with the irradiation dose increasing, the passive current density, closely related to the surface corrosion resistance, decreases firstly and increases subsequently. The mechanism of the corrosion behavior transformation is due to the amorphous phase formation firstly and the amorphous phase destruction and the polycrystalline structure formation in the irradiated surface subsequently.

关键词： Zircaloy-4 irradiation damage corrosion resistance, structure transformation

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Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays

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Nano-Micro Letters 2025年第3期17卷 297-309页

作者： Chang Gu Guojian yang Wenxuan Wang Aiyan Shi Wenjuan Fang Lei Qian Xiaofei Hu Ting Zhang Chaoyu Xiang Yu‑Mo Zhang Laboratory of Optoelectronic Information Technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China State Key Lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China

High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental stability,ideal outdoor readability,and low energy ***,the limited intrinsic structure of inorganic materials has presented a significant challenge in achieving precise patterning/pixelation at the micron ***,we successfully developed the direct photolithography for WOx nanoparticles based on in situ photo-induced ligand *** strategy enabled us to achieve ultra-high resolution efficiently(line width3600 cycles),as well as promising applications in electronic logos,pixelated displays,flexible electronics,*** success and advancements presented here are expected to inspire and accelerate research and development(R&D)in high-resolution non-emissive displays and other ultra-fine micro-electronics.

关键词： Electrochromic Direct photolithography WOx nanoparticles In situ photo-induced ligand exchange High-resolution displays

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New developments at nuclear emulsion experiment

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Nuclear Science and Techniques 1998年第4期9卷 213-217页

作者： qianwan－Yan CaiXu 等 TheInstituteofparticlephysics Hua－ZhongNormalUniversityWuhan430079 TheInstituteofparticlephysics Hua

Three new nuclear cmulsion techniques used for measuring emission angles ofcharged particles in central events at ultra-high evergy heavy-ion collisions are fully described.

关键词：重离子多粒子产生原子核乳胶实验

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A Method for Identifying Channeling Paths in Low-Permeability Fractured Reservoirs

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Fluid Dynamics & Materials Processing 2022年第6期18卷 1781-1794页

作者： Zhenfeng Zhao Bin Li Zubo Su Lijing Chang Hongzheng Zhu Ming Liu Jialing Ma Fan Wang qianwan Li Oil&Gas Technology Research Institute PetroChina Changqing Oilfield CompanyXi’an710000China School of Petroleum Engineering Yangtze UniversityWuhan430100China

Often oilfield fractured horizontal wells produce water flowing in multiple *** this study,a method to identify such channeling paths is *** dual-medium model is based on the principle of inter-well connectivity and considers the flow characteristics and related channeling *** Lorentz curve is drawn to qualitatively discern the geological type of the low-permeability fractured reservoir and determine the channeling direction and *** practical application of such an approach to a sample oilfield shows that it can accurately identify the channeling paths of the considered low-permeability fractured reservoir and predict production performances according to the inter-well connectivity *** a result,early detection of water channeling becomes possible,paving the way to real-time production system optimization in low-permeability fractured reservoirs.

关键词： Low-permeability fractured reservoir fracturing horizontal well interwell connectivity dual media channeling paths

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襄阳欧庙卸甲山出土春秋青铜器

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江汉考古 2015年第3期 28-37页

作者：陈千万易泽林陈坤襄阳市博物馆湖北襄阳441021

2014年2月在襄阳市襄城区欧庙镇卸甲山村发现一批青铜器,计有鼎2、缶2、盘1、盉1、器盖1,共7件。据出土现场判断,这批青铜器应出自墓葬,但难以确认是否出自同一墓葬。铜器年代主要为春秋中期,文化特征具有较浓厚的地方特色,为研究江淮... 详细信息

2014年2月在襄阳市襄城区欧庙镇卸甲山村发现一批青铜器,计有鼎2、缶2、盘1、盉1、器盖1,共7件。据出土现场判断,这批青铜器应出自墓葬,但难以确认是否出自同一墓葬。铜器年代主要为春秋中期,文化特征具有较浓厚的地方特色,为研究江淮地区古方国的文化传承提供了重要资料。

关键词：襄阳卸甲山出土铜器春秋中期

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粗茎秦艽种子生物学研究

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中国中药杂志 2011年第5期36卷 552-555页

作者：吴靳荣赵志礼孟千万上海中医药大学生药学教研室上海201203

目的:了解濒危药用植物粗茎秦艽种子的生物学特性。方法:5批不同产地粗茎秦艽种子的形态学观察、发芽试验和生活力的TTC法测定。结果:5批种子外部形态基本相同;贮存8个月后,各样品生活力相近,但野生种子的发芽率最高;同时,该野生种子与2... 详细信息

目的:了解濒危药用植物粗茎秦艽种子的生物学特性。方法:5批不同产地粗茎秦艽种子的形态学观察、发芽试验和生活力的TTC法测定。结果:5批种子外部形态基本相同;贮存8个月后,各样品生活力相近,但野生种子的发芽率最高;同时,该野生种子与2008XR02号样品的发芽势较其他3个样品为高;千粒重与发芽率之间的相关性不明显。结论:初步推断,野生种子与2008XR02号种子的品质较优;本工作可为该物种的就地保护及优良种质的选育提供基础资料。

关键词：粗茎秦艽种子生物学千粒重发芽率生活力

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堆高机电动化改造技术

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交通节能与环保 2024年第S1期20卷 73-76页

作者： Qingdao qianwan Container Terminal Co., LTD. 青岛前湾集装箱码头有限责任公司

为解决传统内燃堆高机能源效率低、排放污染重、运行和维护成本高的现实情况，该项目通过对以往集装箱堆高机的易发故障及可靠性进行分析，提出了对燃油堆高机的优化改进策略，用电机替代原有发动机，实现了堆高机的电动化作业。改造后... 详细信息

为解决传统内燃堆高机能源效率低、排放污染重、运行和维护成本高的现实情况，该项目通过对以往集装箱堆高机的易发故障及可靠性进行分析，提出了对燃油堆高机的优化改进策略，用电机替代原有发动机，实现了堆高机的电动化作业。改造后，电动堆高机的响应速度明显比内燃机快，起升速度也更均匀，操作更加柔和。从测试数据来看，纯电动堆高机技术各项性能全面优于内燃堆高机。目前第三代堆高机改造后，持续扩大电池容量，采用带势能回收的多电机，实现全面换电和自动插拔电，续航能力达到了11小时。

关键词：集装箱码头堆高机吊运性能分析优化改造续航能力

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乳清分离蛋白纤维和典型抗氧化剂对罗伊氏乳杆菌TMW 1.656在常温贮藏胁迫下存活的影响

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食品科学 2023年第2期44卷 139-145页

作者：郭前婉王琪严文莉张运艳康旭赵萌湖北工业大学发酵工程教育部重点实验室国家“111”细胞调控与分子药物学中心湖北武汉430068 上海良友(集团)有限公司技术中心上海200333

为研究新型纳米材料乳清分离蛋白纤维(whey protein isolate fibrils,WPIF)和典型抗氧化剂对益生菌常温贮藏氧胁迫的保护影响,采用乳清分离蛋白(whey protein isolate,WPI)和WPIF为壁材,添加不同质量浓度的典型抗氧化剂表没食子酸儿茶... 详细信息

为研究新型纳米材料乳清分离蛋白纤维(whey protein isolate fibrils,WPIF)和典型抗氧化剂对益生菌常温贮藏氧胁迫的保护影响,采用乳清分离蛋白(whey protein isolate,WPI)和WPIF为壁材,添加不同质量浓度的典型抗氧化剂表没食子酸儿茶素没食子酸酯(epigallocatechin gallate,EGCG)和谷胱甘肽(glutathione,GSH),采用喷雾干燥法制备干态菌粉。结果表明,在常温贮藏期间,益生菌的贮藏稳定性按照WPIF≈WPI>WPI+0.5 mg/mL EGCG>WPI+0.5 mg/mL GSH>WPI+5.0 mg/mL EGCG>WPI+5.0 mg/mL GSH的顺序下降。WPIF保护菌体的效果与WPI相差不大,其原因可能是高温使得纤维发生分解和聚集,从而导致没有发挥纤维优越的效果;抗氧化剂EGCG和GSH在抑菌实验和贮藏实验中都显著加速了益生菌的死亡,且具有质量浓度依赖性,这可能与其本身的抗菌活性或氧化产物的细胞毒性有关。

关键词：乳清分离蛋白纤维抗氧化剂表没食子酸儿茶素没食子酸酯谷胱甘肽氧胁迫益生菌

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