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WLAN-log-based superspreader detection in the COVID-19 pandemic

High-Confidence Computing 2021年第1期1卷 2-11页

作者： Cheng Zhang Yunze pan Yunqi Zhang Adam C.Champion zhaohui Shen Dong Xuan Zhiqiang Lin Ness B.Shroff Department of Computer Science and Engineering The Ohio State UniversityUSA Department of Electrical and Computer Engineering The Ohio State UniversityUSA Virtual Kare LLC USA

Identifying“superspreaders”of disease is a pressing concern for society during pandemics such as *** represent a group of people who have much more social contacts than *** widespread deployment of WLAN infrastructure enables non-invasive contact tracing via people’s ubiquitous mobile *** technology offers promise for detecting *** this paper,we propose a general framework for WLAN-log-based superspreader *** our framework,we first use WLAN logs to construct contact graphs by jointly considering human symmetric and asymmetric ***,we adopt three vertex centrality mea-surements over the contact graphs to generate three groups of superspreader ***,we leverage SEIR simulation to determine groups of superspreaders among these candidates,who are the most critical individuals for the spread of disease based on the simulation *** have implemented our framework and evaluate it over a WLAN dataset with 41 million log entries from a large-scale *** evaluation shows superspread-ers exist on university *** change over the first few weeks of a semester,but stabilize throughout the rest of the *** data also demonstrate that both symmetric and asymmetric contact tracing can dis-cover superspreaders,but the latter performs better with daily contact ***,the evaluation shows no consistent differences among three vertex centrality measures for long-term(i.e.,weekly)contact graphs,which necessitates the inclusion of SEIR simulation in our *** believe our proposed framework and these results can provide timely guidance for public health administrators regarding effective testing,intervention,and vaccination policies.

关键词： Superspreader detection WLAN logs Contact tracing Network analysis COVID-19 pandemic

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LncRNA JPX/miR-33a-5p/Twist1 axis regulates tumorigenesis and metastasis of lung cancer by activating Wnt/β-catenin signaling

LncRNA JPX/miR-33a-5p/Twist1 axis regulates tumorigenesis an...

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中国生物化学与分子生物学会2020全国学术在线会议

作者： Jinchang pan zhaohui Gong Department of Biochemistry and Molecular Biology Medical School of Ningbo University

MicroRNAs(miRNAs) and Twist 1-induced epithelial-mesenchymal transition(EMT) in cancer cell dissemination are well established,but the involvement of long noncoding RNAs(lncRNAs) in Twist1-mediated signaling remains largely *** the present study,we observed that lncRNA JPX was upregulated in lung cancer metastatic tissues and was closely correlated with tumor size and an advanced ***,JPX promoted lung cancer cell proliferation in vitro and facilitated lung tumor growth in ***,JPX upregulated Twist1 by competitively sponging miR-33 a-5 p and subsequently induced EMT and lung cancer cell ***,JPX and Twist1 were coordinately upregulated in lung cancer tissues and ***,the JPX/miR-33 a-5 p/Twist1 axis participated in EMT progression by activating Wnt/β-catenin *** findings suggest that lncRNA JPX,a mediator of Twistl signaling,could predispose lung cancer cells to metastasis and may serve as a potential target for targeted therapy.

关键词： Epithelial-mesenchymal transition Twist1 Long noncoding RNA Wnt/β-catenin signaling Lung cancer

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Microbubble resonators combined with a digital optical frequency comb for high-precision air-coupled ultrasound detectors

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Photonics Research 2020年第3期8卷 303-310页

作者： JINGSHUN pan BIN ZHANG ZHENGYONG LIU JIAXIN ZHAO YUANHUA FENG LEI WAN zhaohui LI Key Laboratory of Optoelectronic Materials and Technologies School of Electrical and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China Department of Electronic Engineering College of Information Science and TechnologyJinan UniversityGuangzhou 510632China

Fast and sensitive air-coupled ultrasound detection is essential for many applications such as radar,ultrasound imaging,and defect *** we present a novel approach based on a digital optical frequency comb(DOFC)technique combined with high-Q optical microbubble resonators(MBRs).DOFC enables precise spectroscopy on resonators that can trace the ultrasound pressure with its resonant frequency shift with femtometer resolution and sub-microsecond response *** noise equivalent pressure of air-coupled ultrasound as low as 4.4 m Pa∕pHz is achieved by combining a high-Q(~3×10~7)MBR with the DOFC ***,it can observe multi-resonance peaks from multiple MBRs to directly monitor the precise spatial location of the ultrasonic *** approach has a potential to be applied in 3 D air-coupled photoacoustic and ultrasonic imaging.

关键词： optical precise bubble

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Application of an antibody chip for screening differentially expressed proteins during peach ripening and identification of a metabolon in the SAM cycle to generate a peach ethylene biosynthesis model

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Horticulture Research 2020年第1期7卷 2328-2341页

作者： Wenfang Zeng Liang Niu zhaohui Wang Xiaobei Wang Yan Wang Lei pan Zhenhua Lu Guochao Cui Weining Weng Mingqiao Wang Xun Meng Zhiqiang Wang Author details 1Zhengzhou Fruit Research Institute Chinese Academy of Agricultural Sciences450009 ZhengzhouChina Abmart 200233 ShanghaiChina Northwest University 710127 Xi’anChina

Peach(Prunus persica)is a typical climacteric fruit that produces ethylene rapidly during ripening,and its fruit softens *** hard peach cultivars,however,do not produce large amounts of ethylene,and the fruit remains firm until fully ripe,thus differing from melting flesh peach *** identify the key proteins involved in peach fruit ripening,an antibody-based proteomic analysis was conducted.A mega-monoclonal antibody(mAb)library was generated and arrayed on a chip(mAbArray)at a high density,covering~4950 different proteins of *** the screening of peach fruit proteins with the mAbArray chip,differentially expressed proteins recognized by 1587 mAbs were identified,and 33 corresponding antigens were ultimately identified by immunoprecipitation and mass *** proteins included not only important enzymes involved in ethylene biosynthesis,such as ACO1,SAHH,SAMS,and MetE,but also novel factors such as ***,protein–protein interaction analysis identified a metabolon containing SAHH and *** combining the antibody-based proteomic data with the transcriptomic and metabolic data,a mathematical model of ethylene biosynthesis in peach was *** results showed that MetE is an important regulator during peach ripening,partially through interaction with SAHH.

关键词： peach cycle screening

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基于方向发射率校正的红外测温补偿方法

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仪器仪表学报 2022年第6期43卷 213-220页

作者：潘冬蒋朝辉桂卫华中南大学自动化学院长沙410083

红外热成像仪具有实时在线、非接触获取被测对象二维温度分布等优点,在钢铁、农业、电力电子等众多领域应用广泛。但是,红外测温结果容易受到干扰因素的影响。针对方向发射率变化引起的红外测温误差,本文提出了基于方向发射率校正的红... 详细信息

红外热成像仪具有实时在线、非接触获取被测对象二维温度分布等优点,在钢铁、农业、电力电子等众多领域应用广泛。但是,红外测温结果容易受到干扰因素的影响。针对方向发射率变化引起的红外测温误差,本文提出了基于方向发射率校正的红外测温补偿方法。首先,基于红外测温原理,构建了针对方向发射率变化的红外测温补偿模型。其次,为确定补偿模型中的方向发射率,利用红外热像仪和激光扫描仪构建的三维热成像系统,提出了基于参考体的方向发射率校正方法。然后,通过多项式拟合确定方向发射率随视角变化的规律。实验结果表明所提红外测温补偿方法可以有效降低方向发射率变化造成的红外测温误差,经过补偿温度后,红外测温最大误差由9.64℃降低为2.97℃,标准差由3.57℃降低为0.71℃。

关键词：红外热成像方向发射率视角温度补偿参考体

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Highly efficient acousto-optic modulation using nonsuspended thin-fil1m lithium niobate-chalcogenide hybrid waveguides

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Light(Science & Applications) 2022年第6期11卷 1285-1295页

作者： Lei Wan Zhiqiang Yang Wenfeng Zhou Meixun Wen Tianhua Feng Siqing Zeng Dong Liu Huan Li Jingshun Ppan Ning Zhu Weiping Liu zhaohui Li Department of Electronic Engineering College of Information Science and TechnologyJinan University510632 GuangzhouChina Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University510275 GuangzhouChina State Key Laboratory for Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityZijingang Campus310058 HangzhouChina Institute of Semiconductor Science and Technology Guangdong Engineering Technology Research Center of Low Carbon and New Energy MaterialsSouth China Normal University510631 GuangzhouChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) 519000 ZhuhaiChina

A highly efficient on-chip acousto-optic modulator is as a key component and occupies an exceptional position in microwave-to-optical *** thin-film lithium niobate is preferentially employed to build the suspended configuration for the acoustic resonant cavity,with the aim of improving the modulation efficiency of the ***,the limited cavity length and complex fabrication recipe of the suspended prototype restrain further breakthroughs in modulation efficiency and impose challenges for waveguide *** this work,based on a nonsuspended thin-film lithium niobate-chalcogenide glass hybrid Mach-Zehnder interferometer waveguide platform,we propose and demonstrate a built-in push-pull acousto-optic modulator with a half-wave-voltage-length product VnL as low as 0.03 V cm that presents a modulation efficiency comparable to that of a state-of-the-art suspended counterpart.A microwave modulation link is demonstrated using our developed built-in push-pull acousto-optic modulator,which has the advantage of low power *** nontrivial acousto-optic modulation performance benefits from the superior photoelastic property of the chalcogenide membrane and the completely bidirectional participation of the antisymmetric Rayleigh surface acoustic wave mode excited by the impedance-matched interdigital transducer,overcoming the issue of low modulation efficiency induced by the incoordinate energy attenuation of acoustic waves applied to the Mach-Zehnder interferometer with two arms in traditional push-pull acousto-optic modulators.

关键词： modulator waveguide interferometer

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Direct Synthesis of Crystalline Graphtetrayne-A New Graphyne Allotrope

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CCS Chemistry 2021年第4期3卷 1368-1375页

作者： Qingyan pan Siqi Chen Chenyu Wu Feng Shao Jing Sun Lishui Sun zhaohui Zhang Yixiao Man Zhibo Li Lixia He Yingjie Zhao College of Polymer Science and Engineering Qingdao University of Science and TechnologyQingdao 266042 The University of New South Wales SydneyNSW 2052 Department of Chemistry Faculty of ScienceNational University of SingaporeSingapore 117543

We report a bottom-up synthesis of a new graphyne allotrope-graphtetrayne(GTTY),which features four acetylene linkages between the adjacent benzene on the surface of copper under low *** as-prepared GTTY exhibited nanosheet morphology with an average thickness of 4.5 *** analysis based on high-resolution transmission electron microscopy(HR-TEM)/selected area electron diffraction(SAED)characterizations revealed high crystallinity formed with a ninefold stacking *** GTTY displayed excellent semiconductor properties bearing a band gap of 1.3 eV and a conductivity of 0.285 S m^(−1)at room ***,by the space-charge-limited current(SCLC)method,the measured hole and electron mobilities of the GTTY films reached up to 1.47×10^(3) cm^(2) V^(−1)S^(−1)and 2.98×10^(3)cm^(2)V^(−1)S^(−1),respectively.

关键词： graphdiyne two-dimensional materials sp carbon graphtetrayne semiconductor pure carbon materials

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Laplace metasurfaces for optical analog computing based on quasi-bound states in the continuum

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Photonics Research 2021年第9期9卷 1758-1766页

作者： DANPING pan LEI WAN MIN OUYANG WEI ZHANG ALEXANDER A.POTAPOV WEIPING LIU ZIXIAN LIANG TIANHUA FENG zhaohui LI Department of Electronic Engineering College of Information Science and TechnologyJinan UniversityGuangzhou 510632China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 511400China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China

Laplace operation,the isotropic second-order differentiation,on spatial functions is an essential mathematical calculation in most physical equations and signal *** the Laplace operation in a manner of optical analog computing has recently attracted attention,but a compact device with a high spatial resolution is still ***,we introduce a Laplace metasurface that can perform the Laplace operation for incident lightfield *** exciting the quasi-bound state in the continuum,an optical transfer function for nearly perfect isotropic second-order differentiation has been obtained with a spatial resolution of wavelength *** a Laplace metasurface has been numerically validated with both 1D and 2D spatial functions,and the results agree well with that of the ideal Laplace *** addition,the edge detection of a concerned object in an image has been demonstrated with the Laplace *** results pave the way to the applications of metasurfaces in optical analog computing and image processing.

关键词： surface quasi continuum

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脑科学的新手段新技术:信息+系统+智能视角

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科学通报 2015年第10期60卷 912-916页

作者：吴朝晖潘纲浙江大学计算机科学与技术学院杭州310027

随着各种测量大脑活动与行为的新技术、新手段的出现,脑科学研究得到了快速发展,脑科学与信息技术的深度结合正成为未来发展的重要趋势与研究热点.本文从信息视角、系统视角和智能视角对脑科学研究与信息技术交叉融合进行了若干思考,并... 详细信息

随着各种测量大脑活动与行为的新技术、新手段的出现,脑科学研究得到了快速发展,脑科学与信息技术的深度结合正成为未来发展的重要趋势与研究热点.本文从信息视角、系统视角和智能视角对脑科学研究与信息技术交叉融合进行了若干思考,并提出一些见解.

关键词：脑科学脑机融合混合智能

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高炉铁水温度检测方法的研究进展

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仪器仪表学报 2023年第12期44卷 280-296页

作者：潘冬蒋朝辉许川桂卫华中南大学自动化学院长沙410083

高炉铁水温度是分析铁水质量、判断炉温状态及评估高炉能耗水平的重要指标,铁水温度检测是钢铁行业的强制性需求。本文根据测温仪表的工作原理,将现有铁水测温技术进行分类分析,结合高炉出铁场环境特点和铁水特点,从测温原理、测温位置... 详细信息

高炉铁水温度是分析铁水质量、判断炉温状态及评估高炉能耗水平的重要指标,铁水温度检测是钢铁行业的强制性需求。本文根据测温仪表的工作原理,将现有铁水测温技术进行分类分析,结合高炉出铁场环境特点和铁水特点,从测温原理、测温位置、技术特点等方面论述了现有测温技术的优缺点。为实现高炉铁水温度的实时在线准确检测,重点介绍了红外视觉测温方法的研究进展和应用潜力。在总结现有铁水测温技术的基础上,分析了红外视觉测温方法存在的主要问题及未来研究方向,旨在为学术界和工业界研究人员提供铁水测温技术方面的一些参考和借鉴。

关键词：高炉铁水温度检测红外视觉环境认知温度补偿

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