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CONSTRUCTION METHOD OF A-OPTIMAL CHEMICAL BALANCE WEIGHING DESIGNS [PDF]

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2015
Here, we study the design in that we determine unknown measurements of p objects by used of n measurement operations. For that reason we consider the chemical balance weighing design under assumption that the measurement errors are uncorrelated and they ...
Bronisław Ceranka, Małgorzata Graczyk
doaj   +2 more sources

New Results Regarding the Construction Method for D‑optimal Chemical Balance Weighing Designs

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2020
We study an experiment in which we determine unknown measurements of p objects in n weighing operations according to the model of the chemical balance weighing design. We determine a design which is D‑optimal. For the construction of the D‑optimal design,
Bronisław Ceranka, Małgorzata Graczyk
doaj   +1 more source

A Regular D‑optimal Weighing Design with Negative Correlations of Errors

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2019
The issues concerning optimal estimation of unknown parameters in the model of chemical balance weighing designs with negative correlated errors are considered. The necessary and sufficient conditions determining the regular D‑optimal design and some new
Małgorzata Graczyk, Bronisław Ceranka
doaj   +1 more source

Balanced bipartite weighing designs

open access: yesJournal of Combinatorial Theory, Series A, 1976
AbstractA block B denotes a set of k = k1 + k2 elements which are divided into two subsets B1 and B2, where |Bi| = ki, i = 1 or 2. Two elements of B are said to be linked or n-linked in B if and only if they belong to different subsets or the same subset of B respectively.
openaire   +1 more source

Optimum Chemical Balance Weighing Design with Correlated Errors Based on Bipartite and Ternary Designs

open access: yes, 2009
Classification AMS 1993: 62K15 The paper is studying the estimation problem of individual weights of objects using the chemical balance weighing design under the restriction on the number times in which each object is weighed. It is assumed that the errors have the same variances and they are equal correlated.
Ceranka, Bronisław   +1 more
openaire   +1 more source

Balanced bipartite weighing designs leading to regular D-optimal spring balance weighing designs

open access: yes, 2011
W pracy przedstawiono nową metodę konstrukcji regularnego D-optymalnego sprężynowego układu z tarowaniem przy założeniu, że wariancje błędów pomiarów nie są jednorodne. Do konstrukcji macierzy układu wykorzystano macierze incydencji dwudzielnych układów bloków.
openaire   +1 more source

Assessing the impact of group antenatal care on gestational length in Rwanda: A cluster-randomized trial. [PDF]

open access: yesPLoS One, 2021
Sayinzoga F   +11 more
europepmc   +1 more source

Bipartite binding and partial inhibition links DEPTOR and mTOR in a mutually antagonistic embrace. [PDF]

open access: yesElife, 2021
Heimhalt M   +15 more
europepmc   +1 more source

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