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Versatile photonic molecule switch in multimode microresonators

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Light(Science & Applications) 2024年第3期13卷 498-509页

作者： Zihan Tao Bitao Shen Wencan Li Luwen Xing Haoyu Wang yichen wu Yuansheng Tao Yan Zhou Yandong He Chao Peng Haowen Shu Xingjun Wang State Key Laboratory of Advanced Optical Communications System and Networks School of ElectronicsPeking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China School of Integrated Circuits Peking University100871 BejingChina Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China Peng Cheng Laboratory Shenzhen 518055China

Harnessing optical supermode interaction to construct artificial photonic molecules has uncovered a series of fundamental optical phenomena analogous to atomic ***,the distinct energy levels and interactions in such two-level systems were provided by coupled *** reconfigurability is limited,as they often require delicate external field stimuli or mechanically altering the geometric *** highly specific approaches also limit potential ***,we propose a versatile on-chip photonic molecule in a multimode microring,utilizing a flexible regulation methodology to dynamically control the existence and interaction strength of spatial *** transition between single/multi-mode states enables the“switched-off/on”functionality of the photonic molecule,supporting wider generalized applications *** particular,“switched-on”state shows flexible and multidimensional mode splitting control in aspects of both coupling strength and phase difference,equivalent to the *** *** effect.“Switched-off”state allows for perfect low-loss single-mode transition(Qi~10 million)under an ultra-compact bend size(FSR~115 GHz)in a foundry-based silicon *** breaks the stereotyped image of the FSR-Q factor trade-off,enabling ultra-wideband and high-resolution millimeter-wave photonic *** demonstration provides a flexible and portable solution for the integrated photonic molecule system,extending its research scope from fundamental physics to real-world applications such as nonlinear optical signal processing and sixth-generation wireless communication.

关键词： switched multimode millimeter

Multifunctional mixed analog/digital signal processor based on integrated photonics

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Opto-Electronic Science 2024年第8期3卷 1-12页

作者： yichen wu Qipeng Yang Bitao Shen Yuansheng Tao Xuguang Zhang Zihan Tao Luwen Xing Zhangfeng Ge Tiantian Li Bowen Bai Haowen Shu Xingjun Wang State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing 100871China College of Engineering Peking UniversityBeijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010China School of Electronic Engineering Xi’an University of Posts&TelecommunicationsXi’an 710121China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing 100871China Peng Cheng Laboratory Shenzhen 518055China

Photonic signal processing offers a versatile and promising toolkit for contemporary scenarios ranging from digital optical communication to analog microwave *** to its electronic counterpart,it eliminates inherent bandwidth limitations and meanwhile exhibits the potential to provide unparalleled scalability and flexibility,particularly through integrated ***,by far the on-chip solutions for optical signal processing are often tailored to specific tasks,which lacks versatility across diverse ***,we propose a streamlined chip-level signal processing architecture that integrates different active and passive building blocks in silicon-on-insulator(SOI)platform with a compact and efficient *** and in-depth analyses for the architecture are conducted at levels of device,system,and *** by appropriate configuring schemes,the photonic circuitry supports loading and processing both analog and digital signals *** distinct tasks are facilitated with one single chip across several mainstream fields,spanning optical computing,microwave photonics,and optical ***,it has demonstrated competitive performance in functions like image processing,spectrum filtering,and electro-optical bandwidth *** high universality and a compact form factor,the proposed architecture is poised to be instrumental for next-generation functional fusion systems.

关键词： silicon photonics multifunctional signal process microwave photonics optical computing optical communica-tion equalization

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智能时代的工业设计教育

中国艺术 2024年第4期 86-93页

作者：武奕陈中国美术学院工业设计学院

工业设计在经历了工业革命、工艺美术运动、现代与后现代主义以及信息时代技术的迅猛发展后,转变成了与技术变革紧密相关的设计领域。智能时代的到来,使工业设计迈进了新的探索时代,也为作为交叉学科人才培养场域的专业教育带来了跨学... 详细信息

工业设计在经历了工业革命、工艺美术运动、现代与后现代主义以及信息时代技术的迅猛发展后,转变成了与技术变革紧密相关的设计领域。智能时代的到来,使工业设计迈进了新的探索时代,也为作为交叉学科人才培养场域的专业教育带来了跨学科融合的新机遇。本文以中国美术学院工业设计学院的工业设计教育现状与趋势为对象,以2024年学院毕业设计部分作品为案例,探讨智能时代背景下工业设计作为交叉学科专业所面临的新的机遇与挑战。尤其重要的是,在人工智能崛起的当下,探讨工业设计教育新的发展方向及可能性,旨在为设计教育者提供有价值的见解和指导,推动工业设计教育在智能时代进行更明确的定位,实现更高水平的发展。

关键词：智能时代工业设计设计教育

小非编码RNA在精子发生及男性不育中的功能机制

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中国科学：生命科学 2024年第4期54卷 556-568页

作者：潘舵武怡辰殷子奇刘默芳中国科学院分子细胞科学卓越创新中心生物化学与细胞生物学研究所上海200031

小非编码RNA是一类特殊的基因调控因子,可在转录、转录后和表观遗传水平上调控真核生物细胞的基因表达.大量研究发现,包括piRNA,miRNA和tsRNA等小非编码RNA在哺乳动物雄性生殖细胞中高丰度表达,为精子发生和雄性生殖必需,其表达异常及... 详细信息

小非编码RNA是一类特殊的基因调控因子,可在转录、转录后和表观遗传水平上调控真核生物细胞的基因表达.大量研究发现,包括piRNA,miRNA和tsRNA等小非编码RNA在哺乳动物雄性生殖细胞中高丰度表达,为精子发生和雄性生殖必需,其表达异常及相关调控通路基因突变与男性不育密切相关.本文总结近期关于小非编码RNA与精子发生相关的研究进展,将主要概述小非编码RNA在哺乳动物精子发生中的生物学功能和作用机制相关最新研究进展,并探讨其异常调控与男性不育的相关性及其在男性不育临床诊治中的潜在应用.

关键词：小非编码RNA piRNA miRNA tsRNA 精子发生男性不育

东准噶尔塔合尔巴斯陶蛇绿岩带特征及地质意义

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新疆地质 2024年第1期42卷 69-74页

作者：吴羿辰韩琼新疆维吾尔自治区地质调查院新疆乌鲁木齐830000

塔合尔巴斯陶蛇绿岩位于卡拉麦里俯冲增生杂岩带的西北段,共有5个大小不同的岩片组成。地球化学显示,塔合尔巴斯陶蛇绿岩中的玄武岩具LREE轻度亏损或整体平坦特征,与MORB特征相似;辉长岩稀土元素分布模式整体显示平坦型特征,接近MORB。... 详细信息

塔合尔巴斯陶蛇绿岩位于卡拉麦里俯冲增生杂岩带的西北段,共有5个大小不同的岩片组成。地球化学显示,塔合尔巴斯陶蛇绿岩中的玄武岩具LREE轻度亏损或整体平坦特征,与MORB特征相似;辉长岩稀土元素分布模式整体显示平坦型特征,接近MORB。微量元素N-MORB标准化蛛网图显示,玄武岩、辉长岩中大离子亲石元素Sr,K,Rb,Ba明显富集,高场强元素Nb明显亏损,Ta适度富集。认为塔合尔巴斯陶蛇绿岩为卡拉麦里混杂岩带的组成部分,兼有岛弧火山岩特征,是早石炭世弧后盆地扩张的产物。

关键词：塔合尔巴斯陶蛇绿岩地球化学特征卡拉麦里蛇绿岩地质意义

基于共生理论的“互联网+”企业创新生态系统关系治理模式研究

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科技管理研究 2024年第8期44卷 171-181页

作者：周青吴翌晨曹鑫杭州电子科技大学管理学院浙江杭州310018

促进“互联网+”企业创新生态系统可持续发展要求妥善处理好系统中的关系风险。目前“互联网+”企业创新生态系统的相关研究在关系治理、主体互动关系及其可能产生的关系风险和治理机制等方面仍不足。为此,基于共生理论,通过对现有文献... 详细信息

促进“互联网+”企业创新生态系统可持续发展要求妥善处理好系统中的关系风险。目前“互联网+”企业创新生态系统的相关研究在关系治理、主体互动关系及其可能产生的关系风险和治理机制等方面仍不足。为此,基于共生理论,通过对现有文献的梳理汇总,探讨“互联网+”企业创新生态系统3种关系治理模式的互动方式、关系风险和治理机制,并以小米(小米科技有限责任公司)、抖音、微信小程序等典型案例分析验证。研究发现:偏利共生型关系治理模式下,机构型创新主体为主导者,以效率为导向,实现创新行为的控制,其治理机制为核心企业控治;寄利共享型关系治理模式下,社群型创新主体为主导者,以公平为导向,实现创新关系的扩散,其治理机制为“社群自治+核心企业同治”;互利共赢型关系治理模式下,创新主体间平等合作,以民主为导向,实现创新效能质的提升,其治理机制为社群与核心企业共治。此外,这3种关系治理模式均以技术和创意等资源作为生态系统战略利益的根本来源,并借助其向创新主体表达自己的价值导向。然而,不同的关系特征会引起不同的共生风险,主要包括创新资源投入不平衡、主体利益分配不公平、竞合关系维持不稳定。基于此,要明确“互联网+”企业创新生态系统中主体的角色,核心企业应根据情况选择不同的关系治理范式。

关键词： “互联网+”企业创新创新生态系统互动方式风险防范关系治理共生理论

Survey on rain removal from videos or a single image

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Science China(Information Sciences) 2022年第1期65卷 72-94页

作者： Hong WANG yichen wu Minghan LI Qian ZHAO Deyu MENG School of Mathematics and Statistics Ministry of Education Key Lab of Intelligent Networks and Network Security Xi'an Jiaotong University Pazhou Lab

Rain can cause performance degradation of outdoor computer vision tasks. Thus, the exploration of rain removal from videos or a single image has drawn considerable attention in the field of image processing. Recently, various deraining methodologies have been proposed. However, no comprehensive survey work has yet been conducted to summarize existing deraining algorithms and quantitatively compare their generalization ability, and especially, no off-the-shelf toolkit exists for accumulating and categorizing recent representative methods for easy performance reproduction and deraining capability evaluation. In this regard, herein, we present a comprehensive overview of existing video and single image deraining methods as well as reproduce and evaluate current state-of-the-art deraining methods. In particular, these approaches are mainly classified into model-and deep-learning-based methods, and more elaborate branches of each method are presented. Inherent abilities, especially generalization performance, of the state-of-the-art methods have been both quantitatively and visually analyzed through thorough experiments conducted on synthetic and real benchmark datasets. Moreover, to facilitate the reproduction of existing deraining methods for general users, we present a comprehensive repository with detailed classification, including direct links to 85 deraining papers, 24 relevant project pages, source codes of 12 and 25 algorithms for video and single image deraining, respectively, 5 and 10 real and synthesized datasets, respectively, and 7 frequently used image quality evaluation metrics, along with the corresponding computation codes. Research limitations worthy of further exploration have also been discussed for future research along this direction.

关键词： rain removal maximum a posterior estimation deep learning generalization performance comprehensive repository

Thianthrene Radical Cation as a Transient SET Mediator:Photoinduced Thiocyanation and Selenocyanation of Arylthianthrenium Salts

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Chinese Journal of Chemistry 2023年第16期41卷 1979-1986页

作者： Xiao-Yue Chen Xin Kuang yichen wu Jian Zhou Peng Wang Shonghai Key Laboratory of Green Chemistry and Chemica/Process East China Norma/University3663 N Zhongshan RoodShanghai 200062China State Key Laboratory of Organometallic Chemistry Shanghoi Institute of Orgonic ChemistryUniversity of Chinese Acodemy of SciencesCAS345 Lingling RoadShanghai 200032China CAS Key laboratony of Energy Regulation Moterials Shanghai Istitute of Organic ChemistrCAS345 Lingling RoodShanghai 200320China School of Chemistry and Moterials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Ssciences1 Sub lane XiangshanHangzhouZhejiang 310024China

Comprehensive Summary A novel transient SET mediator approach has been developed for the photoinduced radical-radical cross coupling *** the in-situ generated thianthrene radical cation as the transient SET mediator,the thiocyanation and selenocyanation of aryl thianthrenium salts have been realized under the mild conditions without the need for photocatalyst or single electron *** comparison with the photocatalyst enabled process,the protocol features mild conditions,simple manipulation,a broad substrate scope,excellent functional group and heterocycle *** to the feasible accessibility of aryl thianthrenium salts,this method has also been applied in the efficient synthesis of a bioactive molecule,and the late-stage functionalization of complex arenes.

关键词： Transient SET mediator Thiocyanation and selenocyanation Arylthianthrenium salts Radical reaction Photosynthesis

Para-selective borylation of monosubstituted benzenes using a transient mediator

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Science China Chemistry 2020年第3期63卷 336-340页

作者： Jie wu Zengwei Wang Xiao-Yue Chen yichen wu Daoming Wang Qian Peng Peng Wang State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryShanghai 200032China CAS Key Laboratory of Energy Regulation Materials Shanghai Institute of Organic ChemistryShanghai 200032China State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin 300071China

Herein,we conceptualized a transient mediator approach that has the capability of para-selective C–H functionalization of monosubstituted *** approach is enabled by in situ generation of a versatile sulfonium salt via highly electrophilic phenoxathiine or thianthrene dication intermediate which can be readily generated from its sulfoxide with trifluoromethanesulfonic *** mechanistic study implied that the remarkable para selectivity might be related to the incredible electrophilicity of thianthrene dication *** versatility of this approach was demonstrated via paraborylation of various monosubstituted simple aromatics combining the sulfonium salt formation with further photocatalyzed transformation.

关键词： para-borylation monosubstituted arene transient mediator thianthrenation sulfide dication