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matvey金蟲(chóng) (正式寫(xiě)手)
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[求助]
求助翻譯幾段話
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The run-time quality control procedures serve as an indicator of possible emerging problems by flagging deviations greater than 3 tolerance units as defined for each element in Table 5. Persistently increasing trends are investigated to determine their cause(s) before they impact the results of Standard Reference Materials analyses. The acceptance criteria of results for the elements certified in the SRMs is that the uncertainty intervals for the analytical results and those of the certified values should overlap each other. If any element fails this then the run of unknowns is repeated. Repeated failures indicate the need for recalibration. A value for chi-square is calculated and reported with the data to indicate the quality of the fit. Chisquare values that are much larger than 1.0 indicate a problem in the fitting procedure. Changes in detector resolution or gain in the amplifier produce large values for chi-square; however such changes would be detected by the run-time quality control procedure. Also, large chi-square values can accompany results for heavily loaded filters even though the relative errors are typical. In addition, elements analyzed by the titanium and the iron fluorescers may experience large chi-square values due to interferences from overlapping elements. Chi-square is a more useful measure of goodness-of-fit for the other fluorescers for this reason. |
榮譽(yù)版主 (文壇精英)
有愛(ài)的二哥
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表五所示,運(yùn)行時(shí)間質(zhì)量控制過(guò)程通過(guò)標(biāo)記比事先定義的3個(gè)公差單位更大的標(biāo)記偏差來(lái)為突然出現(xiàn)的指示器故障服務(wù)的。在他們影響標(biāo)準(zhǔn)品分析結(jié)果之前,頻繁的觀察其增長(zhǎng)趨勢(shì)來(lái)決定產(chǎn)生這些結(jié)果的原因. 在SRMs上堅(jiān)定的元素的結(jié)果的接受尺度為對(duì)于分析結(jié)果的變化不定的時(shí)間間隔和這些鑒定值應(yīng)該彼此相交。如果任一一種元素不符合這一要求,那么未知樣品應(yīng)該重復(fù)操作,再次失敗則表明需要重新校準(zhǔn)。 卡方值計(jì)算后和數(shù)據(jù)一同出報(bào)告以顯示其質(zhì)量的可行性?ǚ街颠h(yuǎn)遠(yuǎn)大于1.0表明設(shè)備過(guò)程有問(wèn)題。改變探測(cè)器的分辨率或改善放大器能使卡方值增大。然而這種改變將會(huì)被運(yùn)行時(shí)間質(zhì)量控制過(guò)程檢測(cè)出來(lái)。此外,通過(guò)鈦和金屬熒光劑的因素分析可能會(huì)導(dǎo)致大卡方值增大,其主要原因?yàn)橹丿B元素的干擾。正因?yàn)槿绱,卡方值是比其他熒光劑更有用的充分認(rèn)識(shí)擬合良度的檢測(cè)。 |
金蟲(chóng) (小有名氣)
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運(yùn)行時(shí)間質(zhì)量控制程序,通過(guò)顯示幅度變化超過(guò)在圖5中每個(gè)因素各自定義的3個(gè)單位值而被當(dāng)作可能出現(xiàn)問(wèn)題的一個(gè)指標(biāo)。我們通過(guò)對(duì)一個(gè)持續(xù)上升的趨勢(shì)調(diào)查以確定產(chǎn)生這些趨勢(shì)的的原因(S),在它們影響標(biāo)準(zhǔn)的參考材料分析的結(jié)果之前。 在SRMS中被驗(yàn)證的所有因素驗(yàn)收標(biāo)準(zhǔn)的結(jié)果應(yīng)該表現(xiàn)為,分析結(jié)果的不確定性的時(shí)間間隔和標(biāo)準(zhǔn)值應(yīng)互相重疊。如果存在任何一個(gè)因素未能做到這一點(diǎn),則會(huì)運(yùn)行重復(fù)的未知的程序。如果失敗了多次,則表明需要重新校準(zhǔn)。 卡方值計(jì)算和報(bào)告的數(shù)據(jù)表明安裝的質(zhì)量。 如果Chisquare值比1.0大的多,則表明安在裝過(guò)程中有問(wèn)題。這時(shí)應(yīng)該試著改變檢測(cè)器的分辨率或增加放大器增益的變化而產(chǎn)生大的卡方值,但這種變化會(huì)在運(yùn)行時(shí)的質(zhì)量控制程序被檢測(cè)到。同時(shí),大量的卡方值會(huì)在過(guò)多的裝載過(guò)濾器時(shí)伴隨產(chǎn)生過(guò)濾器,雖然它的相對(duì)誤差是很典型的。此外,由于重疊元素的干擾,在用鈦和鐵熒光劑對(duì)元素進(jìn)行分析時(shí),可能會(huì)遇到大量的卡方值。因此,對(duì)于別的熒光劑來(lái)說(shuō),卡方可以更好的應(yīng)用于吻合度的測(cè)試。 |
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