The Effect Of Rogue Wave In Complex Plasma With A Q-nonextensive Electron Velocity Distribution

In the past few years,plasma and nonlinear fluctuations caused widespread attention and prompted people to study it,especially the rogue waves,setting off a boom in research to rogue waves.Oceanographers from the 20th century observed and studied the freak waves,in recent years,more and more scholars begin to pay attention to rogue waves and find out the explanation of rogue waves in theory and numerical simulation,as well as the application and prevention of rogue waves.In this paper,we use the hydrodynamic equations as models to get the nonlinear Schrodinger equation(NLSE)and the kordeweg-de Vries equation(KdV)of the plasma systems of different components are respectively deduced by the method of reduced perturbation.According to the NLSE's rogue wave solution,the breathe solution,the soliton solution and the solitary wave solution of the KdV equation,and several nonlinear waves are studied.In order to achieve the purpose of controlling the width of the rogue wave and the maximum amplitude,and to understand the relationship between the rogue wave and several other nonlinear waves.The main contents of this thesis are as follows:1.Main study the influence of the superthermal electron-positron-ion plasma system parameters on the rogue wave.The nonlinear Schrodinger equation based on multi-component plasma is obtained by the method of reduced perturbation and the influence of system parameters on the rogue wave solutions of the nonlinear Schrodinger equation is discussed.With the increase or decrease of some parameters,the width and height of the rogue wave also decrease or increase correspondingly,so the coverage of the rogue wave and the appearance or disappearance of the rogue wave can be controlled by adjusting the parameters.2.The propagation characteristics of kuznetsov-Ma berathe(k-M)?Akhmediev breathe and rogue wave in nonextensive plasma system are studied.The effects of system parameters on kM breathe,AB breathe,rogue wave,bright soliton and dark soliton are further analyzed.The effects of linear waves,including the width and height of waves.As well as k-M breathe,AB breathe,strange wave propagation characteristics.3.we study the influence of the q-nonextensive distribution of electrons on the propagation characteristics of(1+1)-dimensional nonlinear acoustic soliton waves in complex multi-component thermal plasmas.With the starting point of magnetohydrodynamics equations,(1+1)is the KdV equation for the nonlinear ion solitary wave motion process.At the same time,the parameters of the plasma system and the q-nonextensive distribution of the electrons are discussed for the nonlinear ion acoustic soliton Wave propagation characteristics,amplitude,width of the important impact.