نتایج جستجو برای: difference families
تعداد نتایج: 538514 فیلتر نتایج به سال:
Abstract Strong external difference families (SEDFs) have applications to cryptography and are rich combinatorial structures in their own right. We extend the definition of SEDF from abelian groups all finite groups, introduce concept equivalence. prove new recursive constructions for SEDFs generalized (GSEDFs) cyclic present first family non-abelian SEDFs. there exist at least two non-equivale...
aim and background: the family functioning is a suitable anticipant scale for mental health therefore, the goal of the current study was to compare family functioning of psychiatric disorders . methods and materials: this study was an analytical descriptive and cross-sectional study that performed on 150 inpatients with anxiety disorders , depressive disorders and bipolar disorders schizophr...
Background: Functions of a family refer to its systematic characteristics and include the ability of families to protect the principles governing this institution to keep its wholeness. The aim of this study was to compare the performance of families with mentally retarded children and families with healthy children. Methods: This case-control study was conducted in 2015 in Ahvaz City, Iran....
Let G be an abelian group. A collection of (G, k, λ) disjoint difference families, {F0,F1, · · · ,Fs−1}, is a complete set of disjoint difference families if ∪0≤i≤s−1∪B∈FiB form a partition of G− {0}. In this paper, several construction methods are provided for complete sets of disjoint difference families. Applications to one-factorizations of complete graphs and to cyclically resolvable cycli...
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