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231.
Rozet E Rudaz S Marini RD Ziémons E Boulanger B Hubert P 《Analytica chimica acta》2011,702(2):160-171
Evaluation of analytical results reliability is of core importance as crucial decisions are taken with them. From the various methodologies to evaluate the fitness of purpose of analytical methods, overall measurement uncertainty estimation is more and more applied. Overall measurement uncertainty allows to combine simultaneously the remaining systematic influences to the random sources of uncertainty and allows assessing the reliability of results generated by analytical methods. However there are various interpretations on how to estimate overall measurement uncertainty, and thus various models for estimating it. Each model together with its assumptions has great impacts on the risks to abusively declare that analytical methods are suitable for their intended purpose. This review paper aims at (i) summarizing the various models used to estimate overall measurement uncertainty, (ii) provide their pros and cons, (iii) review the main areas of application and (iv) as a conclusion provide some recommendations when evaluating overall measurement uncertainty. 相似文献
232.
Marini RD Groom C Doucet FR Hawari J Bitar Y Holzgrabe U Gotti R Schappler J Rudaz S Veuthey JL Mol R Somsen GW de Jong GJ Ha PT Zhang J Van Schepdael A Hoogmartens J Briône W Ceccato A Boulanger B Mangelings D Vander Heyden Y Van Ael W Jimidar I Pedrini M Servais AC Fillet M Crommen J Rozet E Hubert P 《Electrophoresis》2006,27(12):2386-2399
233.
234.
Jacques Boulanger Jean-Luc Chabert 《Transactions of the American Mathematical Society》2004,356(12):5071-5088
Let be a cyclotomic field with ring of integers and let be a polynomial whose values on belong to . If the ideal of generated by the values of on is itself, then every algebraic integer of may be written in the following form:
for some integer , where the 's are roots of unity of . Moreover, there are two effective constants and such that the least integer (for a fixed ) is less than , where
for some integer , where the 's are roots of unity of . Moreover, there are two effective constants and such that the least integer (for a fixed ) is less than , where
235.
The electric quadrupole shift is presently the most significant source of uncertainty on the systematic shifts for several single-ion optical frequency standards. We present a simple method for cancelling this shift based on measurements of the Zeeman spectrum of the clock transition. This method is easy to implement and yields very high cancellation levels. A fractional uncertainty of 5 x 10(-18) for the canceled quadrupole shift is estimated for a measurement of the absolute frequency of the 5s (2)S(1/2)-4d (2)D(5/2) clock transition of 88Sr+. 相似文献
236.
237.