In view of high-speed working characteristics of four-bar beating-up system, the simulation study was carried out under the influence of joint clearance and beating-up resistance.The discontinuous contact model with two-state was applied to clearance modeling of crank bearing.A rigid flexible coupling model of double side four-bar beating-up system
Components of selection in the evolution of the influenza virus: linkage effects beat inherent selection.
The influenza virus is an important human pathogen, with a rapid rate of evolution in the human population.The rate of homologous recombination within genes of influenza is essentially zero.As such, Flight Controllers where two alleles within the same gene are in linkage disequilibrium, interference between alleles will occur, whereby selection act