Dust Acoustic Rotation Modes in Magnetized Complex Plasmas

A theoretical investigation is made of the low-frequency electrostatic modes in a cylindrical system and in magnetized dusty plasmas.The linear dispersion relation of the rotational modes is derived.We discuss the difference between the magnetized and unmagnetized modes.When the dusty plasma is confined in a finite region,the void behavior is observed at high speed rotation.Vivid structures of different mode number solutions are illustrated.

石灰处理粘性土的动态性质

本文在大量程应变和侧限压力条件下确定了经过8％石灰处理的高岭土、钠蒙脱土和钙蒙脱土三种压密粘性土的动态性质。三种土的塑性指数范围是:18到514。经过石灰处理影响并改善了三种土的动态性质。这三种土,随着应变范围的增加周期性正割剪切模量减小,等量粘滞衰减系数增大。随着石灰含量的增加,钠蒙脱土的剪模量显著增大,等量粘滞衰减系数减小。钙蒙脱土也具有相似的性质。两种蒙脱土之间反应曲线的差异被认为是由于钙蒙脱土中原来就存在钙而造成的。高岭土对石灰处理的特性曲线是比较缓和的。本文提出了处理土相对于未处理土的规范化曲线。这些曲线图为改善粘性土的动态性质所需石灰量的初步估算提供了有益的指导作用。