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Colour compound lenses for a portable fluorescence microscope

Light(Science & Applications) 2019年第1期8卷 531-543页

作者： Bo Dai ziao jiao Lulu Zheng Hunter Bachman Yongfeng Fu Xinjun Wan Yule Zhang Yu Huang Xiaodian Han Chenglong Zhao Tony Jun Huang Songlin Zhuang Dawei Zhang Engineering Research Center of Optical Instrument and System the Ministry of EducationShanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and Technology200093 ShanghaiChina Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27709USA Department of Medical Microbiology and Parasitology School of Basic Medical SciencesFudan University200032 ShanghaiChina Department of Laboratory Medicine Shanghai Cancer CenterFudan University200032 ShanghaiChina Department of Physics University of DaytonDaytonOH 45469USA Department of Electro-Optics and Photonics University of DaytonDaytonOH 45469USA

In this article,we demonstrated a handheld smartphone fluorescence microscope(HSFM)that integrates dualfunctional polymer lenses with a *** HSFM consists of a smartphone,a field-portable illumination source,and a dual-functional polymer lens that performs both optical imaging and ***,compared with the existing smartphone fluorescence microscope,the HSFM does not need any additional optical *** fluorescence imaging has traditionally played an indispensable role in biomedical and clinical applications due to its high specificity and sensitivity for detecting cells,proteins,DNAs/RNAs,etc.,the bulky elements of conventional fluorescence microscopes make them inconvenient for use in point-of-care *** HSFM demonstrated in this article solves this problem by providing a multifunctional,miniature,small-form-factor fluorescence *** multifunctional fluorescence module can be seamlessly attached to any smartphone camera for both bright-field and fluorescence imaging at cellular-scale resolutions without the use of additional bulky lenses/filters;in fact,the HSFM achieves magnification and light filtration using a single *** and tissue observation,cell counting,plasmid transfection evaluation,and superoxide production analysis were performed using this ***,this lens system has the unique capability of functioning with numerous smartphones,irrespective of the smartphone model and the camera technology housed within each *** such,this HSFM has the potential to pave the way for realtime point-of-care diagnosis and opens up countless possibilities for personalized medicine.

关键词： portable smart illumination

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Improving accuracy of automatic optical inspection with machine learning

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Frontiers of Computer Science 2022年第1期16卷 45-56页

作者： Xinyu TONG ziao YU Xiaohua TIAN Houdong GE Xinbing WANG Department of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai200240China Ambit Microsystems Shanghai201600China

Electronic devices require the printed circuit board(PCB)to support the whole structure,but the assembly of PCBs suffers from welding problem of the electronic components such as surface mounted devices(SMDs)*** automated optical inspection(AOI)machine,widely used in industrial production,can take the image of PCBs and examine the welding ***,the AOI machine could commit false negative errors and dedicated technicians have to be employed to pick out those misjudged *** paper proposes a machine learning based method to improve the accuracy of *** particular,we propose an adjacent pixel RGB value based method to pre-process the image from the AOI machine and build a customized deep learning model to classify the *** present a practical scheme including two machine learning procedures to mitigate AOI *** conduct experiments with the real dataset from a production line for three months,the experimental results show that our method can reduce the rate of misjudgment from 0.3%–0.5%to 0.02%–0.03%,which is meaningful for thousands of PCBs each containing thousands of electronic components in practice.

关键词： automated optical inspection industrial internet of things machine learning image classification

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基于相变蓄冷的风冷模块化数据中心应急供冷单元实验研究及性能分析

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制冷学报 2022年第6期43卷 41-48页

作者：黄彬郑子鏖陆高锋郑春元李斌翟晓强上海交通大学机械与动力工程学院上海200240 广东美的暖通设备有限公司佛山528000

为提高风冷模块化数据中心的运行可靠性,本文提出一种基于相变蓄冷的应急供冷技术途径,搭建蓄冷单元实验台,研究不同进口温度对相变蓄冷单元蓄冷和释冷过程的影响。同时,对蓄冷单元中弓形肋片长度、高度、间距及蓄冷板间距进行敏感性分... 详细信息

为提高风冷模块化数据中心的运行可靠性,本文提出一种基于相变蓄冷的应急供冷技术途径,搭建蓄冷单元实验台,研究不同进口温度对相变蓄冷单元蓄冷和释冷过程的影响。同时,对蓄冷单元中弓形肋片长度、高度、间距及蓄冷板间距进行敏感性分析。结果表明:实验蓄冷单元至少能满足5 min的应急冷却需求;弓形肋片高度对综合传热性能影响最大,肋片长度次之,肋片间距和蓄冷板间距最小;当实验蓄冷单元的肋片高度由2.0 mm降至1.5 mm时,综合传热性能可提升57%。

关键词：数据中心应急供冷相变蓄冷强化传热

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