This paper analyze the stability of soil-nail wall with limit balanced analytical method, and assume the slip surface, destroy surface as dual fold line, circular arc line, parabolic curve or log spiral curve etc.
本文采用极限平衡分析方法对土钉墙内部稳定性进行了分析，滑动面、破坏面的形状假定为双折线、圆弧线、抛物线或对数螺旋曲线进行了描述。
Design of the Archimedean Helix Inlet in a Hydrocyclone AN AUTO-TRACKING PARABOLIC REMOTE-SENSING ANTENNA WITH DUAL MODE ARCHIMEDIAN SPIRAL FEED
水力旋流器中阿基米德螺线入口的设计阿几米德双模螺旋馈源的自跟踪反射镜遥感天线
The spiral chute has spiral segments with cubic-parabolic cross section, and during its operation neither mid-way cut-off of the concentrate nor adding of wash-water are needed.
螺旋溜槽的螺旋槽横截面曲线为立方抛物线，在分选过程中间不截取精矿，也不加冲洗水。
This paper introduces the formulas for calculating the inner forces and deformation of non-circular arches with the fundamental formulas, these non-circular arches including parabolic, three-centered, elliptic, hyperbolic and logarithmic spiral arches under constant loads can be calculated.
本文以圆弧拱坝的形、载常数的基本公式为基础，推导了等厚抛物线、三心圆、椭圆、双曲线及对数螺旋线等拱圈的内力、变位计算公式。