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中文摘要：
得到了描述由尘埃颗粒电荷变化、非热力学平衡分布的离子和Boltzmann分布的电子组成的未磁化的热尘埃等离子体中的尘埃声波的修正的KdV（mKdV）方程．并对诸多的尘埃等离子体参数对尘埃声孤波结构的影响进行了理论研究，结果表明，尘埃等离子体参数决定着尘埃声孤波结构，且只在这些参数特别选定的一些区域，才会出现稳定的孤波．
英文摘要：
In this paper, the properties of soliton structures in a hot, unmagnetized dusty plasma which consists of a negatively charged hot dust fluid with variable dust charge, non-thermal distribution of ions and Boltzmann distribution of electrons have been studied. A modified KdV （mKdV） equation which describes the dust acoustic waves in this system is derived by the reductive perturbation method. The effects of dusty plasma parameters on the dust-acoustic solitary waves is studied theoretically. It is found that the soliton structures is determined by the dusty plasma parameters. Furthermore, the soliton only exists in certain regions where these parameters are specially chosen.
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