Molecular Detection Technique Of Korla Pear Viruses And Grapevine Viruses

In this thesis, at first the dynamic scaling properties of kinetic roughening surfaces, the background knowledge of dynamic scaling theory, the widely-used dynamic equations governing surface growth and the analytical approximate approaches to these equationsare introduced in detail, and then our three main research works in this field are presented.Our first work is by applying a dynamic renormalization-group analysis to the generalized Kardar-Parisi-Zhang(KPZ) equation, which contains an additional term of growth inhomogeneities, to study the dynamic scaling properties of growing surfaces under the influences of impurities and defects. Our results show that the existence of impurities and defects in the growth processes can significantly change the dynamic scaling properties of growing surface and, in fact, tend to roughen the growing surface and shorten its dynamic relaxation process to the steady-growth state. In our analyses and calculations, the effects of impurities and defects on the growth process are attributed to a new effective surface tension which has different scaling behavior from the original one, and the growth inhomogeneities are modeled by Delta function and screened Coulomb function, respectively.The second one is by applying a dynamic renormalization-group approach to the noisy Kuramoto-Sivashinsky(KS) equation with nonlocal nonlinearity to study the effects of long-range interactions on the scaling of the noisy KS equation. Our calculations and analyses imply that the long-range interactions in the noisy KS equation can produce new renormalization-group fixed points with the varying dynamic scaling exponents depending on both the long-range interaction strength and the substrate dimension.The last one is generalized the scaling approach to the nonlocal growth equations to readily get their scaling exponents in both strong and weak...