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光学学报 2003年第S1期23卷 123-124页

作者： Shan Jiang, Yong Luo, Xinda Yin, Wei Shi, Qianggao Huaccelink technologies co., Ltd., Wuhan Research Institute of Posts & Teleco.s, WRI, No. 88, Youkeyuan Road, Wuhan 430074, PR china accelink technologies co. Ltd. Wuhan Research Institute of Posts & Telecoms WRI No. 88 Youkeyuan Road Wuhan 430074 PR China

Crystal optics and fiber grating technology are two of the most important optical fiber device technologies. In this paper, we report several new devices developed in accelink for WDM networks application.

关键词： WDM et in Figure Optical Fiber Devices in WDM Networks

Analysis of Detection and Monitoring Technology in the co.struction and Maintenance of Large Bridges

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Journal of Architectural Research and Development 2024年第3期8卷 134-139页

作者： Shengzhong Xiang qin Su Shili Zhang china Merchants Chongqing Highway Engineering Testing Center co. LTD.Chongqing 400060China

Currently,there is significant attention placed on the co.struction,management,and maintenance of large service *** the realm of bridge maintenance management,the utilization of detection and monitoring technology is *** employing these technologies,we can effectively identify any structural defects within the bridge,promptly unco.er unknown risks,proactively establish maintenance strategies,and prevent the rapid deterioration of bridge *** article aims to explore the advantages of applying bridge monitoring and testing technology and to discuss various methods for implementing detection and monitoring technology throughout the co.struction,management,and maintenance phases of large ***,this will co.tribute to ensuring the safe operation of large bridges.

关键词： Large bridges co.struction Maintenance Monitoring technology Detection technology

Towards carbon neutrality:Sustainable recycling and upcycling strategies and mechanisms for polyethylene terephthalate via biotic/abiotic pathways

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Eco.Environment & Health 2024年第2期3卷 117-130页

作者： Jiaqi Yang Zhiling Li Qiongying Xu Wenzong Liu Shuhong Gao Peiwu qin zhenglin Chen Aijie Wang School of Civil&Environmental Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China State Key Laboratory of Urban Water Resources and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Institute of Biopharmaceutical and Health Engineering Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Tsinghua-Berkeley Shenzhen Institute Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

Polyethylene terephthalate(PET),one of the most ubiquitous engineering plastics,presents both environmental challenges and opportunities for carbon neutrality and a circular *** review co.prehensively addressed the latest developments in biotic and abiotic approaches for PET recycling/***,microbial depolymerization of PET,along with the biosynthesis of reclaimed monomers[terephthalic acid(TPA),ethylene glyco.(EG)]to value-added products,presents an alternative for managing PET waste and enables co.(2)***,thermal treatments(i.e.,hydrolysis,glyco.ysis,methanolysis,etc.)and photo/electrocatalysis,enabled by catalysis advances,can depolymerize or co.vert PET/PET monomers in a more flexible,simple,fast,and co.trollable *** abiotic/biotic catalysis offers great potential for PET upcycling to generate co.modity chemicals and alternative materials,ideally at lower energy inputs,greenhouse gas emissions,and co.ts,co.pared to virgin polymer ***,over 25 types of upgraded PET products(e.g.,adipic acid,muco.ic acid,catechol,vanillin,and glyco.ic acid,etc.)have been identified,undersco.ing the potential of PET upcycling in diverse *** can be made to develop chemo-catalytic depolymerization of PET,improve microbial depolymerization of PET(e.g.,hydrolysis efficiency,enzymatic activity,thermal and pH level stability,etc.),as well as identify new microorganisms or hydrolases capable of degrading PET through co.putational and machine learning ***,this review provides a roadmap for advancing PET recycling and upcycling technologies,which hold the potential to shape the future of PET waste management and co.tribute to the preservation of our eco.ystems.

关键词： PET depolymerization Monomers Recycling/upcycling Biocatalysis Photo/electrocatalysis

Enhanced Sampling Simulations on Transition-Metal-Catalyzed Organic Reactions:Zirco.ocene-Catalyzed Propylene Polymerization and Sharpless Epoxidation

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CCS Chemistry 2024年第4期6卷 964-975页

作者： Xu Han Tian-Yu Sun Yi Isaac Yang Jun Zhang Jing Qiu Zhaoping Xiong Nan Qiao Yun-Dong Wu Yi qin Gao Institute of Theoretical and co.putational Chemistry College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871 Shenzhen Bay Laboratory Shenzhen 518132 Changping Laboratory Beijing 102200 Laboratory of Health Intelligence Huawei Cloud Computing Technologies Co.Ltd.Guizhou 550025

The bond breaking and forming in chemical reactions is a typical rare event,which is one of the difficult problems in molecular dynamics *** enhanced sampling methods have been developed to extend the time scale co.ered by molecular ***,the difficulties of obtaining appropriate co.lective variables from co.plicated reaction pathways and a co.trolled sampling over the desired phase space remain as ***,we use MetaITS,which co.bines metadynamics and integrated tempered sampling,to increase the sampling efficiency for chemical *** with co.lective variables obtained by harmonic linear discriminant analysis can efficiently decrease the main energy barrier of chemical ***,integrated tempered sampling can enhance the exploration of other degrees of *** this study,we applied the MetaITS method to two transition-metal-catalyzed organic reactions with co.plicated reaction *** simulated here a zirco.ocene-catalyzed propylene polymerization to investigate the regioselectivity and temperature *** also studied a Sharpless epoxidation reaction,for which both chiral products are observed through simulation.

关键词： molecular dynamics enhanced sampling metadynamics integrated tempering sampling propylene polymerization Sharpless epoxidation

3D printed multico.e fiber-tip discriminative sensor for magnetic field and temperature measurements

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Light(Advanced Manufacturing) 2024年第1期5卷 82-92页

作者： co.g Xiong Caoyuan Wang Ruowei Yu Wei Ji Yu qin Yichun Shen Wei Chen Ai-Qun Liu Limin Xiao Advanced Fiber Devices and Systems Group Key Laboratory of Micro and Nano Photonic Structures(MoE)Key Laboratory for Information Science of Electromagnetic Waves(MoE)Shanghai Engineering Research Center of Ultra-Precision Optical ManufacturingSchool of Information Science and TechnologyFudan UniversityShanghaiChina Zhongtian Technology Advanced Materials co. Ltd.NantongJiangsuChina Key laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai University.ShanghaiChina Department of Electrical and Electronic Engineering The Hong Kong Polytechnic UniversityHong KongChina

Miniaturized fiber-optic magnetic field sensors have attracted co.siderable interest owing to their superiorities in anti-electromagnetic interference and ***,the intrinsic thermodynamic properties of the material make temperature cross-sensitivity a challenging problem in terms of sensing accuracy and *** this study,an ultraco.pact multico.e fiber(MCF)tip sensor was designed to discriminatively measure the magnetic field and temperature,which was subsequently evaluated *** novel 3D printed sensing co.ponent co.sists of a bowl-shaped microcantilever and a polymer microfluid-infiltrated microcavity on the end-facet of an MCF,acting as two miniaturized Fabry-Perot *** magnetic sensitivity of the microcantilever was implemented by inco.porating an iron micro ball into the microcantilever,and the microfluid-infiltrated microcavity enhanced the capability of highly sensitive temperature *** this tiny fiber-facet device in the two channels of an MCF allows discriminative measurements of the magnetic field and temperature by determining the sensitivity co.fficient matrix of two *** device exhibited a high magnetic field intensity sensitivity,approximately 1805.6 pm/mT with a fast response time of~213 ms and a high temperature sensitivity of 160.3 pm/℃.Moreover,the sensor had a low co.dition number of 11.28,indicating high reliability in two-parameter *** proposed 3D printed MCF-tip probes,which detect multiple signals through multiple channels within a single fiber,can provide an ultraco.pact,sensitive,and reliable scheme for discriminative *** bowl-shaped microcantilever also provides a useful platform for inco.porating microstructures with functional materials,extending multi-parameter sensing scenarios and promoting the application of MCFs.

关键词： Two-photon polymerization Multico.e fiber-tip sensor Magnetic field sensing Discriminative sensing

Single-fundamental-mode cryogenic(3.6 K)850-nm oxideco.fined VCSEL

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Journal of Semico.ductors 2024年第10期45卷 69-73页

作者： Anjin Liu Chenxi Hao Jingyu Huo Hailong Han Minglu Wang Bao Tang Lingyun Li Lixing You Wanhua zheng Key Laboratory of Optoelectronic Materials and Devices Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Shanghai Key Laboratory of Superco.ductor Integrated Circuit Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China accelink technologies co. LtdWuhan 430205China Key Laboratory of Solid-State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Cryogenic oxide-co.fined vertical-cavity surface-emitting laser(VCSEL)has promising application in cryogenic optical interco.nect for cryogenic *** this paper,we demonstrate a cryogenic 850-nm oxide-co.fined VCSEL at around 4 *** cryogenic VCSEL with an optical oxide aperture of 6.5μm in diameter can operate in single fundamental mode with a side-mode suppression-ratio of 36 dB at 3.6 K,and the fiber-co.pled output power reaches 1 mW at 5 *** small signal modulation measurements at 298 and 292 K show the fabricated VCSEL has the potential to achieve a high modulation bandwidth at cryogenic temperature.

关键词： VCSEL cryogenic temperature cryogenic co.puting optical interco.nect

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废塑料资源化回收利用技术

东方电气评论 2024年第4期38卷 16-20,73页

作者：郑明媚庄原发秦佳旺东方电气集团东方锅炉股份有限公司四川自贡643001 清洁燃烧与烟气净化四川省重点实验室成都611731

本文综述了废塑料资源化回收利用技术的研究进展,从物理资源化利用和化学资源化利用两方面介绍了各技术的原理、特点及现存问题。本文提出在当前碳达峰、碳中和背景下,开发成本较低、产品附加值高以及有助于节能降碳的资源化利用技术是... 详细信息

本文综述了废塑料资源化回收利用技术的研究进展,从物理资源化利用和化学资源化利用两方面介绍了各技术的原理、特点及现存问题。本文提出在当前碳达峰、碳中和背景下,开发成本较低、产品附加值高以及有助于节能降碳的资源化利用技术是未来废塑料资源化利用的重点研究方向。

关键词：废塑料物理资源化利用化学资源化利用

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数字孪生丹江口水质模型关键技术与应用

人民长江 2024年第8期55卷 222-230页

作者：靖争曹慧群林莉秦赫郭晓明长江科学院流域水环境研究所湖北武汉430010 南水北调中线水源有限责任公司湖北十堰442700 河南大学黄河文明与可持续发展研究中心河南郑州450046

数字孪生技术作为近年来的创新技术,通过构建精确的虚拟模型实现了对实际物理世界的高度映射,为解决传统水质安全管理中的难题提供了全新的视角和方法。水质模型是实现数字孪生湖库水质安全精准映射和虚实互动的核心。围绕南水北调中线... 详细信息

数字孪生技术作为近年来的创新技术,通过构建精确的虚拟模型实现了对实际物理世界的高度映射,为解决传统水质安全管理中的难题提供了全新的视角和方法。水质模型是实现数字孪生湖库水质安全精准映射和虚实互动的核心。围绕南水北调中线工程的水源地——丹江口水库的水质安全管理需求,针对传统模型存在的模拟失真、误差累积、计算速度慢及无法满足突发污染事件实际决策要求等各种技术难题,提出了一种新型三维水动力水质模型,并利用实地流场观测和水质监测数据进行了模型校验。结果表明:该模型主要改进了组合σ/z网格、总磷本构方程、突发污染投药处置模拟、OpenMP并行计算、水动力预计算和双时间步长模式、污染团扩散轨迹示踪等关键技术,显著提升了模型的计算效率和模拟精度;通过在2023年汉江秋汛期间对丹江口水库水质安全管理的实际应用,证明了该模型能有效支持水质安全“四预”功能(预报、预警、预演、预案),模拟结果为汉江秋汛防御及汛后蓄水水质安全保障提供了重要技术支撑。

关键词：数字孪生水质安全水质模型水动力水质模型丹江口水库

国际碳捕集、利用与封存发展战略与科技态势分析

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中国科学院院刊 2024年第8期39卷 1486-1496页

作者：秦阿宁孙玉玲中国科学院文献情报中心北京100190 中国科学院大学图书情报与档案管理系北京100190

作为应对气候变化和实现碳中和必不可少的技术,碳捕集、利用与封存(CCUS)技术研发和应用受到全球主要国家高度重视。文章梳理近年来美国、欧盟、英国、日本等主要国家和地区CCUS发展战略,并采用文献计量、文本聚类等方法对全球CCUS科技... 详细信息

作为应对气候变化和实现碳中和必不可少的技术,碳捕集、利用与封存(CCUS)技术研发和应用受到全球主要国家高度重视。文章梳理近年来美国、欧盟、英国、日本等主要国家和地区CCUS发展战略,并采用文献计量、文本聚类等方法对全球CCUS科技研发态势进行分析。研究发现,这些主要国家和地区相继出台CCUS相关战略,将发展CCUS上升到国家战略高度,明确提出到2030年、2040年、2050年不同发展阶段的目标和重点攻关方向。CCUS技术领域的研究产出呈现快速增长趋势,研究主要集中在新一代低能耗与低成本co.(2)捕集技术、安全可靠的地质利用与封存技术及co.(2)高效转化利用制高价值化学品/燃料等方向。

关键词：碳捕集、利用与封存战略研究文本挖掘研发态势

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