Fully nonlinear dust-ion acoustic solitary waves are investigated in a multi-species plasma model comprised of warm positive mobile ions with a non-zero ion temperature, non-extensive electrons and negatively charged dust particles. Basic plasma system is reduced to a single energy integral using pseudopotential analysis without sorting to any perturbations or approximation scheme. Existence regions of positive and negative dust-ion acoustic waves as well as soliton profile are determined through phase portrait analysis and numerical investigations. Effects of the electrons non-extensivity parameter, temperature ratios, fractional densities and soliton speeds on both soliton polarities profiles and their corresponding pseudopotentials show that existence domains and soliton characteristics are inherently affected in the considered plasma regime. Bifurcation analysis as well as numerical investigations, revealed that only negative soliton polarities exist for plasma parameters observed in the Earth’s auroral ionosphere.

在多物种等离子体模型中研究了完全非线性的尘埃离子声孤立波，该模型由具有非零离子温度的暖正移动离子、非广泛电子和带负电的尘埃粒子组成。使用赝势分析将基本等离子体系统简化为单个能量积分，而无需分类为任何扰动或近似方案。通过相图分析和数值研究确定了正负尘埃离子声波的存在区域以及孤子轮廓。电子非扩展性参数、温度比、分数密度和孤子速度对孤子极性分布及其相应赝子势的影响表明，存在域和孤子特性在所考虑的等离子体状态中固有地受到影响。