Yangjiang Wei
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Dynamics of an Age-Structured Tumor Cell Population Model with Nutrition Open
A nonlinear age-structured tumor population model, in which the tumor population is divided into proliferating and quiescent cells, and the probability of mitosis in proliferating cells are determined by the concentration of nutrient and t…
Group codes over symmetric groups Open
Let $ \Bbb F_{q} $ be a finite field of characteristic $ q $ and $ S_n $ a symmetric group of order $ n! $. In this paper, group codes in the symmetric group algebras $ \Bbb F_{q}S_n $ with $ q > 3 $ and $ n = 3, 4 $ are proposed. We compu…
Few-weight quaternary codes via simplicial complexes Open
In this paper, we construct quaternary linear codes via simplicial complexes and we also determine the weight distributions of these codes. Moreover, we present an infinite family of minimal quaternary linear codes, which also meet the Gri…
Dynamics of a stage-structured single population model with state-dependent delay Open
In this paper, a novel stage-structured single population model with state-dependent maturity delay is formulated and analyzed. The delay is related to the size of population and taken as a non-decreasing differentiable bounded function. T…
The Diameter of Unit Graphs of Rings Open
Let $R$ be a ring. The unit graph of $R$, denoted by $G(R)$, is the simple graph defined on all elements of $R$, and where two distinct vertices $x$ and $y$ are linked by an edge if and only if $x+y$ is a unit of $R$. The diameter of a sim…