搜索到5021篇“ DUAL-MODE“的相关文章
A dual-mode optical thermometer based on dual-excitation Bi^(3+),Sm^(3+)co-doped Y_(4)GeO_(8) phosphors
2024年
Dual-excitation and dual-emission Y_(4)GeO_(8):Bi^(3+),Sm^(3+)phosphors were manufactured by traditional solidphase sintering technique.The X-ray diffraction,morphology,photoluminescence,energy transfer process and temperature sensing properties of Y_(4)GeO_(8):Bi^(3+),Sm^(3+)samples were comprehensively evaluated.The Y4GeO_(8):Bi^(3+),Sm^(3+)phosphors exhibit characteristic emissions of Bi^(3+)(^(3)P_(1)→^(1)S_(0)) and Sm^(3+)(^(4)G_(5/2)→^(6)H)under both 290 and 347 nm excitations.In fluorescence intensity ratio and Commission International de L'Eclairage coordinates modes,Y_(4)GeO_(8):Bi^(3+),Sm^(3+)samples present excellent temperature measurement performance.The maximum relative sensitivity(S_(r-max)) values of the former are 1.55%/K(460 K,290 nm excitation) and 0.82%/K(506 K,347 nm excitation).The S_(r-max)(x) values of the latter are 0.21 %/K(437 K,290 nm excitation) and 0.15%/K(513 K,347 nm excitation).These results illustrate that Y_(4)GeO_(8):Bi^(3+),Sm^(3+)phospho rs can be used as a candidate material for a dual-mode optical thermometer under dual-excitation.
Danyu ZhangYuxuan LuoJunyu ChenLianjie LiHai Guo
Dual-microcomb generation via a monochromatically pumped dual-mode microresonator
2024年
Microcombs have enabled a host of cutting-edge applications from metrology to communications that have garnered significant attention in the last decade.Nevertheless,due to the thermal instability of the microresonator,additional control devices like auxiliary lasers are indispensable for single-soliton generation in some scenarios.Specifically,the increased system complexity would be too overwhelming for dual-microcomb generation.Here,we put forward a novel approach to mitigate the thermal instability and generate the dual-microcomb using a compact system.This process is akin to mode-division multiplexing,as the dual-microcombs are generated by pumping the dual-mode of a single Si_(3)N_(4) microresonator with a continuous-wave laser.Both numerical simulations and experimental measurements indicate that this innovative technique could offer a straightforward way to enlarge the soliton existence range,allowing entry into the multistability regime and triggering another microcomb alongside the main soliton pulse.This outcome not only shines new light on the interaction mechanism of microresonator modes but also provides an avenue for the development of dual-microcomb-based ranging and low phase noise microwave generation.
RUNLIN MIAOKE YINCHAO ZHOUCHENXI ZHANGZHUOPEI YUXIN ZHENGTIAN JIANG
关键词:RESONATORPUMPEDPUMPING
双模双护盾TBM盾构分体始发关键技术
2024年
为解决在有限空间进行盾构机始发的难题,有效保证施工进度与质量,高效利用施工作业面完成盾构机始发任务;运用盾构机分体始发的方法将刀盘、连接桥架、台车等设备陆续下方至井内[1],以广花城际项目双模双护盾TBM分体始发为依托,案例表明直径8.9m,长度131m,将盾体、连接桥架、8节台车陆续下放至井内。明挖井工作面口仅有18*13m实现了狭窄场地大直径盾构机圆满始发,总结相关经验,为以后相关分体始发工作提供技术支持。
赵文洋
关键词:大直径盾构复杂地质
双模态冲压发动机:从宽域性能优化到模态设计
2024年
航班化航天运输系统的飞行包络宽、飞行任务复杂,要求其冲压发动机具有宽域、高效、推力可调节的运行能力,通过系统级性能优化实现宽域高性能,是双模态冲压发动机研究需要攻克的关键难题。本文回顾了双模态冲压发动机概念提出的背景与初衷、双模态运行机制认知以及双模态冲压发动机性能优化的探索历程,探讨了热力循环分析与宽域性能优化的关系,建议以实现飞行任务为目标,对双模态冲压发动机的运行模态进行设计,探索“基于设计”的宽域模态控制和受控模态转换技术。根据近年来发展的双模态冲压发动机等效热力过程理论,揭示了宽域性能优化若干条件,提出一个便于实现“受控模态转换”的多设计点固定几何燃烧室宽域运行方案设想。为实现宽域模态控制和受控模态转换技术,未来需建立两大能力,一是基于任务约束定量解决进发匹配以及飞发匹配矛盾、建立飞发一体化的“即时按需设计”能力,二是发展受控燃烧组织技术、建立燃烧系统“即时按需设计”的能力。
陈军白菡尘万冰黎崎
关键词:双模态冲压发动机
摆臂式全向移动机器人双模式轨迹跟踪研究
2024年
为了提升室外轮式移动机器人全向机动能力,文中提出一种通过普通轮作为驱动的移动机器人,根据不同动力分配及摆腿转角实现四轮转向(4WS)、斜行和原地转向模式。基于斜行及4WS模式设计了双模式混合控制器,其中,斜行模式采用多点预瞄模糊补偿轨迹跟踪控制,4WS模式采用增量线性时变模型预测控制(ILTV-MPC)。通过试验样机的横、纵向跟踪性能试验得到双模式混合控制器所需的约束条件。采用Simulink∕CarSim联合仿真平台对控制器的有效性进行验证。采用混合控制器的移动机器人底盘在低曲率跟踪时较4WS模式均方根误差相差0.18%,且横摆角与横摆角速度维持不变。结果表明:混合控制器保证全轮转向机器人低曲率跟踪精度的同时提升了其横摆稳定性。
冉起帆姚圣卓陈新波
双模(EPB/TBM)盾构模式转换技术工程实践
2024年
双模盾构机为地质起伏变化较大的盾构隧道工程而设计,通过对平衡模式的切换来适应不同地质环境下盾构的高效施工掘进。深惠城际平湖站至凤岗站区间因具有前段、后段为上软下硬地质,中段为全断面岩层地质的特点而采用EPB/TBM双模盾构施工,其间,需要切换模式4次。文章就盾构机模式切换的方法进行系统的阐述。
张强高志勇吕晨熙
A crosstalk-free dual-mode sweat sensing system for naked-eye sweat loss quantification via changes in structural reflectance被引量:1
2024年
Sweat loss monitoring is important for understanding the body’s thermoregulation and hydration status,as well as for comprehensive sweat analysis.Despite recent advances,developing a low-cost,scalable,and universal method for the fabrication of colorimetric microfluidics designed for sweat loss monitoring remains challenging.In this study,we propose a novel laserengraved surface roughening strategy for various flexible substrates.This process permits the construction of microchannels that show distinct structural reflectance changes before and after sweat filling.By leveraging these unique optical properties,we have developed a fully laser-engraved microfluidic device for the quantification of naked-eye sweat loss.This sweat loss sensor is capable of a volume resolution of 0.5µL and a total volume capacity of 11µL,and can be customized to meet different performance requirements.Moreover,we report the development of a crosstalk-free dual-mode sweat microfluidic system that integrates an Ag/AgCl chloride sensor and a matching wireless measurement flexible printed circuit board.This integrated system enables the real-time monitoring of colorimetric sweat loss signals and potential ion concentration signals without crosstalk.Finally,we demonstrate the potential practical use of this microfluidic sweat loss sensor and its integrated system for sports medicine via on-body studies.
Bowen ZhongHao XuXiaokun QinLingchen LiuHailong WangLili Wang
Dual-mode stabilization for laser to radio-frequency locking by using a single-sideband modulation and a Fabry-Pérot cavity
2024年
The dual-mode stabilization scheme has been demonstrated as an efficient way to stabilize laser frequency.In this study,we propose a novel dual-mode stabilization scheme that employs a sizable Fabry-Pérot cavity instead of the microcavity used in previous studies and has enabled higher bandwidth for locking.The results demonstrate a 30-fold reduction in laser frequency drift,with frequency instability below 169 kHz for integration time exceeding 1 h and a minimum value of 33.8 kHz at 54 min.Further improvement could be achieved by optimizing the phase locking.This scheme has potential for use in precision spectroscopic measurement.
王一博张洪炜赵晨皓赵刚闫晓娟马维光
双模功率分流式混合动力汽车传动系统设计
2024年
针对双模功率分流式混合动力汽车传动系统的构型,首先,对比分析了单、双模式混合动力系统结构特征及应用范围;然后,结合复合分配式特点,选定3种复合分配式四结点杆模型,通过逆向拆分得到所有可行的复合分配式构型,并根据杆长度和特征参数约束条件,确定构型方案;最后,在此基础上,参考某款车型参数,通过分析输入分配模式、模式切换点和机械点特性确定第3排行星排和离合器位置及结构参数,设计出传动系统构型,为研究双模功率分流式混合动力汽车传动系统提供理论依据。
王欢崔露兴葛帅帅张志刚
One stone two birds:electrochemical and colorimetric dual-mode biosensor based on copper peroxide/covalent organic framework nanocomposite for ultrasensentive norovirus detection
2024年
Norovirus(NoV)is regarded as one of the most common causes of foodborne diarrhea in the world.It is urgent to identify the pathogenic microorganism of the diarrhea in short time.In this work,we developed an electrochemical and colorimetric dual-mode detection for NoV based on the excellent dual catalytic properties of copper peroxide/COF-NH_(2)nanocomposite(CuO_(2)@COF-NH_(2)).For the colorimetric detection,NoV can be directly detected by the naked eye based on CuO_(2)@COF-NH_(2)as a laccase-like nonazyme using“peptide-NoV-antibody”recognition mode.The colorimetric assay displayed a wide and quality linear detection range from 1 copy/mL to 5000 copies/mL of NoV with a low limit of detection(LOD)of 0.125 copy/mL.For the electrochemical detection of NoV,CuO_(2)@COF-NH_(2)showed an oxidation peak of copper ion from Cu^(+)to Cu^(2+)using“peptide-NoV-antibody”recognition mode.The electrochemical assay showed a linear detection range was 1-5000 copies/mL with a LOD of 0.152 copy/mL.It's worthy to note that this assay does not need other electrical signal molecule,which provide the stable and sensitive electrochemial detection for NoV.The electrochemical and colorimetric dual-mode detection was used to detect NoV in foods and faceal samples,which has the potential for improving food safety and diagnosing of NoV-infected diarrhea.
Guobao NingQuanmei DuanHuan LiangHuifang LiuMin ZhouChunlan ChenChong ZhangHui ZhaoCanpeng Li
关键词:NOROVIRUSDUAL-MODE

相关作者

鞠强
作品数:14被引量:0H指数:0
供职机构:中国科学院福建物质结构研究所
研究主题:稀土掺杂 纳米发光材料 氯化钡 氟化 荧光光谱仪
涂大涛
作品数:66被引量:9H指数:3
供职机构:中国科学院福建物质结构研究所
研究主题:稀土掺杂 纳米材料 生物检测 生物应用 稀土
陈学元
作品数:174被引量:16H指数:3
供职机构:中国科学院福建物质结构研究所
研究主题:稀土掺杂 纳米晶 稀土 纳米材料 纳米探针
李超
作品数:42被引量:3H指数:1
供职机构:浙江理工大学
研究主题:拼合 下肢康复机器人 屏风 透光 竖直
刘永升
作品数:50被引量:8H指数:2
供职机构:中国科学院福建物质结构研究所
研究主题:稀土掺杂 生物应用 纳米晶 纳米 纳米发光材料