%0 Journal Article %T Nonlinear physics in the navy. Part 2 %A Gaydenok, N.D. %K instability, nonlinear phenomena, Hamiltonian, traveling wave, soliton, tsunami, Ferhulst– Perl equation, Hamiltonian population dynamics, separatrix, COVID-19, traveling wave type model of COVID-19 pandemic, ethnogenesis, expression of dependence of periods of maximum development of ethnogenesis and pandemic, generation time, population growth rate %J Fisheries %D 2022 %N 2022 %P 6 %I FSBI "TSUREN"