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Arbitrary manipulations of focused higher-order Poincare beams by a Fresnel zone metasurface with alternate binary geometric and propagation phases

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Photonics Research 2022年第4期10卷 1117-1126页

作者： XIANGYU ZENG YUQIN ZHANG MANNA GU zijun ZHAN RUIRUI ZHANG YU ZHANG RUI SUN CHANGWEI he CHUNXIANG LIU CHUANFU CheNG School of Physics and Electronics Shandong Normal UniversityJinan 250014China School of Science Shandong Jianzhu UniversityJinan 250101China School of Computer Science and Technology Shandong University of Finance and EconomicsJinan 250014China

The manipulation of high-quality vector beams(VBs)with metasurfaces is an important topic and has potential for classical and quantum *** this paper,we propose a Fresnel zone(FZ)metasurface with metallic nanoslits arranged on FZs,which sets alternate binary geometric and propagation phases to cancel the incident spin component and focus the converted spin component(CSC).The rotation designs of nanoslits transform the incident polarization state on the conventional Poincare sphere to VBs on the higher-order Poincare(HOP)*** two orbital angular momentum states of the CSCs were manipulated,and the focused HOP beams were *** experimental results demonstrate the broadband generation of arbitrarily focused HOP beams of high quality under the illumination of the red(632.8 nm),green(532 nm),and blue(473 nm)*** work will be of significance for the applications of VBs in different areas,such as precision metrology,optical micromanipulation,and quantum information.

关键词： Poincare alternate Fresnel

Coxsackievirus B3 HFMD animal models in Syrian hamster and rhesus monkey

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Virologica Sinica 2024年第2期39卷 290-300页

作者： Suqin Duan Wei Zhang Yongjie Li Yanyan Li Yuan Zhao Weihua Jin Quan Liu Mingxue Li Wenting Sun Lixiong Chen Hongjie Xu Jie Tang Jinghan Hou zijun Deng Fengmei Yang Shaohui Ma Zhanlong he Institute of Medical Biology Chinese Academy of Medical Sciences Medical Primate Research Center Peking Union Medical CollegeYunnan Key Laboratory of Vaccine Research Development on Severe Infectious DiseaseKunming650118China

Coxsackievirus B3(CVB3)is the pathogen causing hand,foot and mouth disease(HFMD),which manifests across a spectrum of clinical severity from mild to ***,CVB3-infected mouse models mainly demonstrate viral myocarditis and pancreatitis,failing to replicate human HFMD *** several enteroviruses have been evaluated in Syrian hamsters and rhesus monkeys,there is no comprehensive data on *** this study,we have first tested the susceptibility of Syrian hamsters to CVB3 infection via different *** results showed that Syrian hamsters were successfully infected with CVB3 by intraperitoneal injection or nasal drip,leading to nasopharyngeal colonization,acute severe pathological injury,and typical HFMD ***,the nasal drip group exhibited a longer viral excretion cycle and more severe pathological *** the subsequent study,rhesus monkeys infected with CVB3 through nasal drips also presented signs of HFMD symptoms,viral excretion,serum antibody conversion,viral nucleic acids and antigens,and the specific organ damages,particularly in the ***,there were no significant differences in myocardial enzyme levels,and the clinical symptoms resembled those often associated with common,mild *** summary,the study successfully developed severe Syrian hamsters and mild rhesus monkey models for CVB3-induced *** models could serve as a basis for understanding the disease pathogenesis,conducting pre-trial prevention and evaluation,and implementing post-exposure intervention.

关键词： Coxsackievirus B3(CVB3) Hand foot and mouth disease(HFMD) Animal models Syrian hamster Rhesus monkey

Transmutation of Cai Lun’s Image

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Paper And Biomaterials 2023年第4期8卷 80-85页

作者： Yuqi Zou zijun Zhu Tingting Li Yuewei Zhu Biao Chen Department for the History of Science and Scientific Archaeology University of Science and Technology of ChinaHefeiAnhui Province230026China

The earliest description of Cai Lun is that of an inventor of papermaking,which is included in historical books such as Dong Guan Han Ji and The Book of the Later Han;later,in his hometown,he was also inked by scholars because of some monuments about him,or the authors used his experience to express their own ***,Cai Lun’s image has been clarified in textbooks,literary works,and urban civilization construction and is no longer considered merely a pioneer of *** development of his historical and literary image derives not only from the need for academic research but also the need to establish the Chinese nationalism and patriotism and promote traditional culture.

关键词： Cai Lun papermaking industrial development personal image

改性LaCoO_(3)用于烟气脱Hg^(0)性能研究

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工程热物理学报 2023年第1期44卷 137-143页

作者：何智冉景煜黄鑫何威冉子俊重庆大学低品位能源利用技术及系统教育部重点实验室重庆400044 重庆大学能源与动力工程学院重庆400044

采用实验方法研究了LaCoO_(3)、La_((1-x))CexCoO_(3)(x=0~0.2)、LaCo_((1-y))MnyO_(3)(y=0~0.15)钙钛矿用于燃煤烟气中元素汞(Hg^(0))脱除,深入探讨了烟气主要成分(O_(2)、SO_(2)、H_(2)O)对Hg0脱除效率的影响。结果表明,La_(0.875)Ce_(0.125)CoO_(3)比LaCoO_(3)具有更高的氧吸附性能,在150℃条件下能实现99.2%的Hg0脱除效率。气态O_(2)是该反应中重要的氧化剂,H_(2)O的负面效果被SO_(2)的加入而抵消。La_(0.875)Ce_(0.125)CoO_(3)在600℃下热再生并循环使用5次后仍然有75.04%的脱汞效率,La_(0.875)Ce_(0.125)CoO_(3)在低温下脱汞性能优异。

关键词： Hg^(0)脱除钙钛矿氧化物燃煤烟气

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我国省际人才集聚对经济增长的贡献测算

科研管理 2019年第11期40卷 247-256页

作者：贺勇廖诺张紫君广东工业大学管理学院

构建"人才集聚-人才资本-经济增长"(T-C-E)的人才经济价值转化链,测算人才集聚对我国省际区域经济增长的贡献作用。首先计算1990-2017年我国大陆31个省(市、自治区)的平均人才集聚度和人才资本水平;然后基于扩展柯布-道格拉斯生产函数... 详细信息

构建"人才集聚-人才资本-经济增长"(T-C-E)的人才经济价值转化链,测算人才集聚对我国省际区域经济增长的贡献作用。首先计算1990-2017年我国大陆31个省(市、自治区)的平均人才集聚度和人才资本水平;然后基于扩展柯布-道格拉斯生产函数计算我国省际区域人才资本对经济增长的贡献率,并采用聚类算法构建"人才集聚度-人才经济贡献率"矩阵进行分析。研究结果表明:我国省际区域的人才集聚水平存在较大差异,北京市人才集聚水平最高,其平均集聚度达到24. 75%,青海省人才集聚度最低,其平均人才集聚度仅为1. 7%;人才集聚水平不同,其区域的人才资本对经济增长的贡献存在显著差异,其中,北京等九个区域的人才资本贡献率超过35%,宁夏等八个区域的人才资本贡献率低于10%;总体而言,人才集聚水平较高的区域,其对经济增长的贡献也较高,但两者之间并不具有严格的正向关系。

关键词：人才集聚人才资本经济增长经济贡献率

EU Seeks Strategic Partnership with China

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China's Foreign Trade 2012年第3期 62-63页

作者： Zhu zijun

he European Union is seeking closer cooperation with China in the context of stagnant world economy and its sovereign debt crisis.

关键词：中国欧盟世界经济债务

Chinese Auto in Foreigners' Eyes

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China's Foreign Trade 2010年第21期 28-29页

作者： Zhu zijun,Guoyan

South Africa South Africa has a long history of auto industry and a large auto ownership. 'heavy trucks and coaches made by some Chinese automakers are of high quality and

关键词：大型汽车中国人眼外国汽车制造商价格竞争力汽车产业重型卡车

考虑产能约束和分配方式的供应链信息共享价值创造与共享意愿

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统计与决策 2017年第17期33卷 47-52页

作者：廖诺张紫君贺勇广东工业大学管理学院广州510520

文章针对由一个存在产能约束的生产商和两个市场需求有差异的零售商所组成的二级供应链,建立系统动力学仿真模型,研究在不同产能约束和分配方式下,供应链和节点企业需求信息共享的价值创造与共享意愿。研究表明:供应链的共享价值和共享... 详细信息

文章针对由一个存在产能约束的生产商和两个市场需求有差异的零售商所组成的二级供应链,建立系统动力学仿真模型,研究在不同产能约束和分配方式下,供应链和节点企业需求信息共享的价值创造与共享意愿。研究表明:供应链的共享价值和共享意愿随产能的降低而降低;生产商的共享价值和共享意愿远高于两个下游零售商,但在产能充裕时,生产商的共享意愿不高;零售商在优先满足自身需求的分配方式下,需求信息共享价值和共享意愿均较低。

关键词：产能约束分配方式信息共享价值创造共享意愿

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文本到视频生成:研究现状、进展和挑战

电子与信息学报 2024年第5期46卷 1632-1644页

作者：邓梓焌何相腾彭宇新北京大学王选计算机研究所北京100080

文本到视频生成旨在根据用户给定的文本描述生成语义一致、内容真实、时序连贯且符合逻辑的视频。该文首先介绍了文本到视频生成领域的研究现状,详细介绍了3类主流的文本到视频生成方法:基于循环网络与生成对抗网络(GAN)的生成方法,基于... 详细信息

文本到视频生成旨在根据用户给定的文本描述生成语义一致、内容真实、时序连贯且符合逻辑的视频。该文首先介绍了文本到视频生成领域的研究现状,详细介绍了3类主流的文本到视频生成方法:基于循环网络与生成对抗网络(GAN)的生成方法,基于Transformer的生成方法和基于扩散模型的生成方法。这3类生成方法在视频生成任务上各有优劣:基于循环网络与生成对抗网络的生成方法能生成较高分辨率和时长的视频,但难以生成复杂的开放域视频;基于Transformer的生成方法有能力生成复杂的开放域视频,但受限于Transformer模型单向偏置、累计误差等问题,难以生成高保真视频;扩散模型具有很好的泛化性,但受制于推理速度和高昂的内存消耗,难以生成高清的长视频。然后,该文介绍了文本到视频生成领域的评测基准和指标,并分析比较了现有主流方法的性能。最后,展望了未来可能的研究方向。

关键词：文本到视频生成扩散模型生成对抗网络