9 research outputs found

    The “Transnational Experience” in San Francisco Chinatown from a Three-dimensional Mirroring, 1860s-1920s

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    对中国人在异邦曲折历史的考察,不仅关系到现今中国人的国际形象,也可能成为思考思自身处境和寻求积极变革的契机。因而,本文力图通过选取四个相关却又各异的文本,研究1860年代至1920年代间具有不同身份和怀有不同目的的中国人到访美国西海岸唐人街的经历,对自己或他人“跨界体验”的思考,以此构成的一段巨变时代的唐人街社会文化史,引出了关于“跨界体验”中“适应与选择”问题的探讨。 绪言:介绍研究的目的、方法和意义,并简要回顾相关领域的研究成果。 第一章“凸透镜”:由19世纪中后期美国西海岸的宏观历史背景切入,以“凸透镜”的视角不断放大,直至深入到那个时代旧金山唐人街的旅行背景、社会生活及家庭教育等具...To investigate Chinese's complicated history in another nation is not only related to the international image of today's Chinese, but provides an opportunity for those who would like to introspect their own plight as well as in search of favorable reformation. This thesis therefore chooses four correlative but distinctive texts, and inspect how Chinese with different identities and purposes descri...学位:历史学硕士院系专业:人文学院_世界史学号:1032014115228

    Experimental study on burying technology of fiber grating Sensor system in driven pile

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    根据光纤Bragg光栅(FBG)传感系统应用于某工程混凝土管桩测试的现状,对该传感系统的抗击打性能进行了试验评价,发现法兰盘接头和附近的区域最易发生破坏,数据连接线也易损坏,而FBG传感器最不易破坏.根据以上试验结果,提出了相应的减振措施,采用粘扣、塑料管、麻绳等手段进行保护,并通过试验验证了此种保护措施的减振效果

    光纤光栅传感系统在打入桩中的埋设工艺试验研究

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    根据光纤Bragg光栅(FBG)传感系统应用于某工程混凝土管桩测试的现状,对该传感系统的抗击打性能进行了试验评价,发现法兰盘接头和附近的区域最易发生破坏,数据连接线也易损坏,而FBG传感器最不易破坏。根据以上试验结果,提出了相应的减振措施,采用粘扣、塑料管、麻绳等手段进行保护,并通过试验验证了此种保护措施的减振效果

    一种面向工业无线网络的自动按需重传时隙分配方法

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    本发明涉及工业无线网络技术,具体地说是一种面向工业无线网络的自动按需重传时隙分配方法。该方法包括超帧结构和网络工作机制设计,重传时隙分配,现场设备丢包率动态调整三个步骤。本发明方法综合考虑工业无线网络采用增强星型拓扑,网络接入设备采用分组策略,现场设备丢包率随时间动态变化的特点,以网络的可靠性作为衡量重传时隙分配方法性能的指标,基NACK重传模式设计出新的网络超帧。在每个超帧,根据前一轮传输丢包情况确定新一轮的重传数据包。此外,在每个超帧动态调整现场设备丢包率以跟踪信道的变化

    Development and Experimental Research on the Variable Buoyancy System for the 6000m Rated Class "Qianlong I" AUV

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    “潜龙一号”是我国2011年启动研发的6 000 m级自主水下航行器(AUV),用于深海海底锰结核探测,是“十二五”规划重点项目之一。由于潜深大,AUV在未知大深度水域航行时,一般需要2~3次下潜才可完成预定深度航行配平要求。研发了“潜龙一号”使用的单向浮力调节系统,在陌生水域进行初次下潜时,将浮力调节装置搭载于“潜龙一号”外部,在航行深度进行自动浮力调节,通过浮力调节,单次便可实现预定下潜深度的最优化配平,并可同步开展该深度下的探测任务。实现了在未知海域、大潜深探测过程无需进行配平的目的,极大提高了“潜龙一号”AUV使用的经济性和方便性。该系统具有功能独立、体积小、使用维护方便等优点,该工作..

    JUNO Sensitivity on Proton Decay pνˉK+p\to \bar\nu K^+ Searches

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in pνˉK+p\to \bar\nu K^+ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+p\to \bar\nu K^+ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is 9.6×10339.6 \times 10^{33} years, competitive with the current best limits on the proton lifetime in this channel

    JUNO sensitivity on proton decay pνK+p → νK^{+} searches

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    JUNO sensitivity on proton decay p → ν K + searches*

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the pνˉK+ p\to \bar{\nu} K^+ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+ p\to \bar{\nu} K^+ is 36.9% ± 4.9% with a background level of 0.2±0.05(syst)±0.2\pm 0.05({\rm syst})\pm 0.2(stat) 0.2({\rm stat}) events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is 9.6×1033 9.6 \times 10^{33} years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies
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