On the twin designs with the Ionin-type parameters.
Kharaghani, H. (2000)
The Electronic Journal of Combinatorics [electronic only]
Similarity:
Displaying similar documents to “Constructing a Canonical form of a Matrix in Several Problems about Combinatorial Designs”
On the twin designs with the Ionin-type parameters.
New symmetric designs from regular Hadamard matrices.
Ionin, Yuri J. (1998)
The Electronic Journal of Combinatorics [electronic only]
Similarity:
On 's and 's admitting a semiregular automorphism group of order 9.
Akiyama, Kenzi, Ogawa, Masayuki, Suetake, Chihiro (2009)
The Electronic Journal of Combinatorics [electronic only]
Similarity:
Latent roots and off-diagonal elements of the association matrix in PBIB designs and the number of associate classes
H. Brzeskwiniewicz (1991)
Applicationes Mathematicae
Similarity:
Connectedness of row and column designs
Bronisław Ceranka, Maria Kozłowska (1991)
Applicationes Mathematicae
Similarity:
Applying balanced generalized weighing matrices to construct block designs.
Ionin, Yury J. (2001)
The Electronic Journal of Combinatorics [electronic only]
Similarity:
A generalization of the diagonal theorem on a block-matrix
E. Pap (1974)
Matematički Vesnik
Similarity:
New Symmetric (61,16,4) Designs Invariant Under the Dihedral Group of Order 10
Landjev, Ivan, Topalova, Svetlana (1998)
Serdica Mathematical Journal
Similarity:
∗ This work has been partially supported by the Bulgarian NSF under Contract No. I-506/1995. In this note we construct five new symmetric 2-(61,16,4) designs invariant under the dihedral group of order 10. As a by-product we obtain 25 new residual 2-(45,12,4) designs. The automorphism groups of all new designs are computed.
Efficiency of cropping system designs via base contrast
U. Bronowicka-Mielniczuk, J. Mielniczuk, T. Przybysz (2000)
Applicationes Mathematicae
Similarity:
The present article is a continuation of previous papers by the same authors devoted to the efficiency of crop rotation experiments. We focus on plans distinguished by the cyclical pattern of the incidence matrix. For practical reasons, we slightly modify the efficiency coefficient. The relation between the resulting efficiency coefficients is examined. In addition, we provide a background material on crop rotation experiments.
Optimal chemical balance weighing designs for objects
Bronisław Ceranka, Małgorzata Graczyk (2003)
Kybernetika
Similarity:
The paper studies the estimation problem of individual weights of objects using a chemical balance weighing design under the restriction on the number times in which each object is weighed. Conditions under which the existence of an optimum chemical balance weighing design for objects implies the existence of an optimum chemical balance weighing design for objects are given. The existence of an optimum chemical balance weighing design for objects implies the existence of an optimum...
X −1 -balance of some partially balanced experimental designs with particular emphasis on block and row-column designs
Ryszard Walkowiak (2015)
Biometrical Letters
Similarity:
This paper considers block designs and row-column designs where the information matrix C has two different nonzero eigenvalues, one of multiplicity 1 and the other of multiplicity h−1, where h is the rank of the matrix C. It was found that for each such design there exists a diagonal positive definite matrix X such that the design is X −1-balanced.