Results 11 to 20 of about 171,148 (274)
About Some Properties and Constructions of Experimental Designs
Acta Universitatis Lodziensis. Folia Oeconomica, 2016 In this paper, we consider the problems related to the determining plan of the experiment performed according to the model of the chemical balance weighing design under additional assumption that the experimental errors are equally negatively correlated.
Bronisław Ceranka, Małgorzata Graczyk
doaj +1 more source
Optimum Choice of Covariates for a Series of SBIBDS Obtained Through Projective Geometry [PDF]
, 2007 A block design set up is considered in presence of a number of controllable covariates. The problem is that of choosing the values of the covariates so that for a given block design, it is optimum in the sense of attaining minimum variance for the ...
Das, Premadhis +2 more
core +2 more sources
Foliar nitrogen fertilization attenuating harmful effects of salt stress on purple basil [PDF]
Revista Brasileira de Engenharia Agrícola e Ambiental, 2023 Salinity can have detrimental effects on plant development. To minimize this damage, strategies such as balanced maintenance of plants’ nutritional status have been proposed previously.
Jackson S. Nóbrega +8 more
doaj +1 more source
On quasi-orthogonal cocycles [PDF]
, 2017 We introduce the notion of quasi-orthogonal cocycle. This is motivated in part by the maximal determinant problem for square {±1}-matrices of size congruent to 2 modulo 4. Quasi-orthogonal cocycles are analogous to the orthogonal cocycles of algebraic
Armario Sampalo, José Andrés +1 more
core +1 more source
On incomplete and balanced incomplete block designs [PDF]
Proceedings of the American Mathematical Society, 1963 By an incomplete block design we will mean an arrangement of v different varieties of objects in b distinct blocks or sets such that a block does not contain all the varieties and a variety appears at most once in a block. An incomplete block design which satisfies two extra conditions, viz.
openaire +2 more sources
Optical Code Construction of 2D Spectral/Spatial BIBD Codes for SAC-OCDMA Systems
Applied Sciences, 2021 Optical code division multiple access (OCDMA) shows limitations in terms of the inefficient bandwidth utilization and low spectral density with one-dimensional (1D) codes. To overcome these limitations, a novel design is presented using a two dimensional
Teena Sharma +5 more
doaj +1 more source
Neighbor Balanced Block Designs for Two Factors [PDF]
, 2010 The concept of Neighbor Balanced Block (NBB) designs is defined for the experimental situation where the treatments are combinations of levels of two factors and only one of the factors exhibits a neighbor effect.
Abeynayake, N. R. +2 more
core +2 more sources
Inter-rater variability of ultrasound scan measurements: balanced incomplete block design
Journal of the College of Community Physicians, 2012 Introduction To assess inter-rater variability of ultrasound scan measurements for determining period of gestation by three raters applying balanced incomplete block design.
Chrishantha Abeysena, Pushpa Jayawardana
doaj +1 more source
A Regular D‑optimal Weighing Design with Negative Correlations of Errors
Acta 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
PBIBDs from weakly divisible nearrings and related codes [PDF]
, 2005 1In [5] the authors are able to give a method for the construction of a family of partially balanced incomplete block designs from a special class of wd-nearrings (wd-designs). In this paper the wd-design incidence matrix and the connected row and column
Anna Benini
core +1 more source