Browsing by Subject "measurement errors"

Now showing 1 - 4 of 4

Access status: Open Access ,
Analiza porównawcza wybranych laboratoryjnych metod oceny współczynnika filtracji gruntów spoistych
(2010) Drożdżak, Ryszard
Archival results of laboratory analyses of filtration coefficient in cohesive ground made in 1997 at the Department of Engineer Geology, Institute of Engineering Geology, University of Warsaw, Poland were re-interpreted in the paper. Over 200 independent measurements were made, e.g. with the use of six different types of cohesive ground. The re-interpretation was aimed at statistical analysis of the results, accounting for the present metro- logical standards, e.g. verification of dubious results and interval evaluation of final results with the uncertainty coefficient calculated. Various laboratory methods of analyzing the filtration coefficient for cohesive grounds are based on different physical assumptions and employ different input parameters, therefore it can be expected that the assumed methods and conditions of analyses will have significant influence on the obtained results. This problem is addressed in the paper.
Access status: Open Access ,
Analiza powtarzalności i odtwarzalności (R&R) jako narzędzie oceny porównawczej różnych metod laboratoryjnych badania współczynnika filtracji gruntów
(2011) Drożdżak, Ryszard; Twardowski, Kazimierz
One of the most efficient tools used for comparative analysis of various investigation methods, i.e. Repeatability and Reproducibility (R&R) analysis is described in the paper. It was discussed on the example of comparative analysis of four different laboratory methods used in practice for investigating ground filtration parameters.
Access status: Open Access ,
Wybrane problemy bilansowania produktów wzbogacania rud miedzi
(Wydawnictwa AGH, 2009) Foszcz, Dariusz; Niedoba, Tomasz; Tumidajski, Tadeusz
The adequate evaluation of feed separation into concentrate and waste is the crucial problem of mineral processing. The paper presents the analysis of copper ores, originating from Legnica and Głogów copper deposit area, beneficiation products balance. The errors of yields determination, which are the effect of improper sample collections, inexactness of chemical analyzes, as well of errors being the effect of products arising time shifts (which can be the highest ones) were taken into consideration. As the measures of the direct errors of chosen product yield estimation, the gradient vectors and its quadratic errors given by total differential method were applied. Then, by Grumbrecht method, the mean values of yields for the balanced period were calculated for minimization of the sums of increments Delta alpha, Delta betha and Delta v. The given results were compared and evaluated"," some of the possibilities of metal production calculations in industrial conditions were discussed.
Access status: Restricted ,
Wyznaczenie dokładności 4-kanałowej karty pomiarowej NI 9215
(Data obrony: 2018-03-05) Marzec, Jakub
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej