By adopting the finite difference method the influences of structural property parameters of endoscopic robot on the minimum membrane thickness of mucus and on the axial frictional traction force were analyzed.

Regularity of relation between structural parameter and strength indexes of unsaturated loess

The coefficients of collapsibility and the structural parameters at different water contents are obtained to show the variation characteristics of collapsibility and loess structure through confined compression tests in 3 different loess areas of Lanzhou City of Gansu Province,Yangling District of Shaanxi Province,and Gongyi City of He nan Province.

A quantitative comprehensive structural parameter mε is defined using ratio of principal stress difference of intact loess to that of disturbed saturated loess under triaxial stress condition,which can not only reflect arrangement but also coherent structure of soil particles.

By summarizing the structural characteristic parameters of multi layer wovens, some design criteria for multi layer wovens are put forward, and a geometric model is established.

A structural characteristic parameter that characterizes timedependent structures was defined as the stiffness ratio between the reinforced concrete slabs on the day 28 and the formwork and shoring system below the slab.