6 research outputs found

    CLSI EP15-A3在临床生化正确度验证中的应用

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    目的探讨美国临床和实验室标准化协会(CLSI)EP15-A3文件在正确度验证中的应用价值。方法按照EP15-A3文件5×5实验设计方案,用IFCC提供的Rela A(水平1)和Rela B(水平2)样品、美国国家标准与技术研究院(NIST)909C参考物质分别验证肌酐(Cr)、尿素(Urea)、尿酸(UA)、总胆固醇(TC)、三酰甘油(TG)、葡萄糖(Glu)的正确度。每个样品每天1批,每批重复5次,共5 d,每个样品获得25个数据。用Grubbs’法计算离群值,单因素方差分析(ANOVA)计算用户的批内不精密度(SR)和实验室内不精密度(SWL),基于SR和SWL计算结果的均值及其标准差,计算靶值(TV)及其标准误差,最后计算出TV的确认区间(VI),观察各指标检测均值是否在VI内,如通过则用户证明了候选方法的偏差可接受;若不通过则计算均值和TV的相对偏差,观察该相对偏差是否小于用户定义的可接受范围(<1/2 TEa),若是则证明候选方法的偏差可接受。否则,需查找原因或与厂家联系。结果6个生化项目的测定结果均通过Grubbs’法离群值检查,各项目无离群值。该次验证实验中,除NIST 909C参考物质样品Urea、TC,Rela样品Cr水平2均值不在VI内,但相对偏差均小于1/2 TEa外,其他均值都在VI内。结论用EP15-A3文件进行验证的6个生化项目的正确度均符合临床要求。国家自然科学基金(81572088);;“十二五”国家科技支撑计划(2013BAI02B04,2012BAI37B01);;广东省中医院拔尖人才项目(2014-47);广东省中医院综合标准化示范项目(YN2015BZ10

    半胶粘二分冲片四极电磁铁

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    本实用新型主要涉及带电粒子传输使用的电磁铁,主要涉及一种用于带电粒子束流聚焦的一种半胶粘二分冲片四极电磁铁,其铁芯冲片(2)通过胶合构成粘结端板(3),两端各一件粘结端板(3)中间夹散铁芯冲片(2)构成磁铁铁芯(1),铁芯(1)由上铁芯(1-1)和下铁芯(1-2)组成,上磁铁组(7-1)和下磁铁组(7-2)相对设置形成四极电磁铁,上磁铁组(7-1)上设有第一极线圈(8-1)和第二极线圈(8-2),下磁铁组(7-2)上设有第三极线圈(8-3)和第四极线圈(8-4),各极线圈的引线分别用线圈压块(9)固定在上磁铁组(7-1)和下磁铁组(7-2)的侧面,下磁铁组(7-2)安装在底座(10)上。其磁场质量高,磁铁稳定性好,工作效率高

    C型冲片二极弯曲电磁铁

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    本实用新型主要涉及带电粒子传输使用的电磁铁,主要涉及带电粒子偏转用装置。一种C型冲片二极弯曲电磁铁,其C字形铁芯冲片(2)叠压成C型磁铁组(1),C型磁铁组(1)为弧形,C型磁铁组(1)的C字形开口处形成丁字形空隙,上励磁绕组(3) 和下励磁绕组(4)分别缠绕在C型磁铁组(1)的上下C字形开口处,在C字形开口内设有调高块(5);在C型磁铁组(1)左端部分别设有第一线圈固定块(7)、第二线圈固定块(8)、第三线圈固定块(9),C型磁铁组(1)的C字形开口处设有高度为80-90mm 的通道,在磁铁组(1)内弧侧面设有集流管(10)。其采用改进性C型冲片,磁场质量高,磁铁重复性好,工作效率高

    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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