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pro vyhledávání: '"Peter-Th. Wilrich"'
Autor:
Peter-Th. Wilrich
Publikováno v:
Accreditation and Quality Assurance. 22:227-232
Often the amount of a substance or the activity of radionuclides in a sample is measured indirectly as the difference between signal and noise, i.e. the difference between the measured value obtained at the sample and that obtained at a sample not co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3410ffa1e21689aa886106ff323ab64b
https://doi.org/10.1007/s00769-017-1264-x
https://doi.org/10.1007/s00769-017-1264-x
Autor:
Peter-Th. Wilrich
Publikováno v:
Frontiers in Statistical Quality Control 12 ISBN: 9783319752945
The lifetime (time to failure) of a product is modeled as Weibull distributed (with unknown parameters); in this case the logarithms of the lifetimes are Gumbel distributed. Lots of items shall be accepted if their fraction p of nonconforming items (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::955890ffedf394f3929e7ae1af3b8061
https://doi.org/10.1007/978-3-319-75295-2_17
https://doi.org/10.1007/978-3-319-75295-2_17
Autor:
Peter-Th. Wilrich
Publikováno v:
Accreditation and Quality Assurance. 21:381-383
The practitioner’s report "Treatment of bimodality in proficiency test of pH in bioethanol matrix" by Sarmanho et al. deals with a proficiency test (PT) for the measurement of pH in bioethanol. One group of 19 participating laboratories used an ele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::080b2737df35bb9ab5439214eb16744f
https://doi.org/10.1007/s00769-016-1229-5
https://doi.org/10.1007/s00769-016-1229-5
Autor:
Peter-Th. Wilrich, Irina Mărgăritescu
Publikováno v:
Journal of AOAC International. 96:1086-1091
Performance of qualitative microbiological measurement methods where the results are either "O" (microorganism not detected) or "1" (microorganism detected) is described by their probability of detection (POD) function, i.e., the POD as a function of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83714c0a231da0254829af674e348b51
https://doi.org/10.5740/jaoacint.12-377
https://doi.org/10.5740/jaoacint.12-377
Autor:
Hans Schneeweiß, Peter-Th. Wilrich
Publikováno v:
Accreditation and Quality Assurance. 19:221-223
We deal with collaborative studies where each of k laboratories performs n repeated binary measurements (measurement result x = 0: “not detected”; measurement result x = 1: “detected”), and present a simple method of constructing a confidence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b60a12e3da9b90589c29992251dc5765
https://doi.org/10.1007/s00769-014-1050-y
https://doi.org/10.1007/s00769-014-1050-y
Autor:
Peter-Th. Wilrich
Publikováno v:
Accreditation and Quality Assurance. 15:439-444
In analogy to quantitative measurements, the precision of qualitative measurement methods can be characterised by the repeatability standard deviation and the reproducibility standard deviation of the sensitivity. In order to determine these standard
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3eeaa076b1eee19fe325bca2748885a
https://doi.org/10.1007/s00769-010-0661-1
https://doi.org/10.1007/s00769-010-0661-1
Autor:
Peter-Th. Wilrich
Publikováno v:
Accreditation and Quality Assurance. 12:231-240
Interlaboratory experiments often contain results that strongly deviate from other results obtained in the same laboratory under repeatability conditions, or laboratory means that strongly deviate from other laboratory means. In ISO 5725-2 [1] and IU
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a48f717e39d6eeceb22caa89d15c712
https://doi.org/10.1007/s00769-006-0240-7
https://doi.org/10.1007/s00769-006-0240-7
Autor:
Peter-Th. Wilrich
Publikováno v:
Frontiers in Statistical Quality Control 11 ISBN: 9783319123547
We deal with sampling inspection by variables, i.e. acceptance sampling procedures wherein the acceptability of a lot is statistically established from the measurement results of a specified continuous variable X obtained at the items in a sample fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af0832ac3e69794f3eafc45340e621e4
https://doi.org/10.1007/978-3-319-12355-4_16
https://doi.org/10.1007/978-3-319-12355-4_16
Autor:
Peter-Th. Wilrich
Publikováno v:
Measurement. 37:21-30
In this paper a procedure for the determination of the cut off point between significant and nonsignificant figures of measurement values or derived values is presented. This procedure uses the standard deviation as a measure of precision and assures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87236522dbb76dc83c8b84b57159eb2b
https://doi.org/10.1016/j.measurement.2004.08.005
https://doi.org/10.1016/j.measurement.2004.08.005
Autor:
Peter-Th. Wilrich
Publikováno v:
Applied Stochastic Models in Business and Industry. 18:339-346
The minimum detectable value of a measurement system is the smallest true value of the measurand X that can be detected as distinct from the true value x = 0 with a specified probability 1-β. If the measurand X is measured indirectly and the directl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37584efa6d6791a5280a2f360f16a8f7
https://doi.org/10.1002/asmb.483
https://doi.org/10.1002/asmb.483