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During the last two years, data sets from three groups and twelve sampling points were used to investigate historical changes between the concentration of the cyanobacteria and the concentrations of total nitrogen (TN), total phosphorus (TP), TN/TP, chemical oxygen dawdling (COD), NO3-, pH, and Chl-a in a shallow temperate zone lake (Guishui Lake, Beijing). The aim of this paper was to evaluate changes...
This paper investigates empirically the influence of regulation logic on the dynamics of two computational models of genetic regulatory network motifs. The gene regulatory network motifs considered in this work consist of three genes with both positive and negative feedback loops. Two forms of fuzzy logic, namely, the Zadeh operators and the probabilistic operators, as well as the summation logic...
Nonlinear problems are arising more and more often in searching for an approximate solution. One of these nonlinear problems is the boundary value problem. Most researches focus on the existence of positive solutions with the help of nonlinear analysis tools such as topological indices, critical point theory, etc, and the effective searching of an approximate solution is indeed an interesting problem...
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