1) Cylindrical spiral
圆柱螺线
1.
The properties of cylindrical spirals were discussed.
通过对一般曲线的切向量的球面像的曲率和挠率的计算,得出了圆柱螺线的三个基本向量的球面像都是球面上的平面曲线,并且是圆弧的结论。
2.
In local differential geometry, the cylindrical spiral is a very important curve.
在局部微分几何中,圆柱螺线是很重要的一种曲线。
2) cylindrical helix
圆柱螺线
1.
A local construction of double cylindrical helix spline is given based on the solving nonlinear optimization.
给出基于非线性规划解的双圆柱螺线样条局部构造法，把平面几何样条——双圆弧样条推广到常曲率和常挠率的空间几何样条。
2.
The triangular rational Bezier representation of cylindrical helix and the generation of the NURBS curves on sphere are discussed in detail.
再次，建立柱坐标系，给出圆柱螺线的三角有理Bézier表示。
3) cylinder helix method
圆柱螺线法
1.
A new algorithm to calculate the near distance spot of adjacent well by using cylinder helix method;
应用圆柱螺线法计算邻井最近距离点的新算法
2.
Natural Parameter Method is a kind of new method of wellbore trajectory computation succeeding Cylinder Helix Method(Radius of Curvature Method) and Minimum Curvature Method.
自然参数法是继圆柱螺线法和最小曲率法之后提出的一种测斜计算新方法,在井眼轨迹设计与计算中有着广泛的用途。
3.
However,when the difference between the deviation angles or azimuth angles of the two ends of an interval is zero,the formula of coordinate calculation of cylinder helix method needs to be specially treated for normal use;and when the difference between deviation angles or azimuth angles is very.
圆柱螺线法是井眼轨迹计算中最常使用的方法之一,在实钻轨迹监控、中靶分析和预测、井身质量评价等实际问题中都有重要的应用。
4) interpolation of cylinder spiral-line
圆柱螺旋线插补
5) quasi helix
拟圆柱螺线样条
6) spiral cam
圆柱螺线凸轮
补充资料：阿基米德螺线
又称“等速螺线”。当一动点沿极径作匀速直线运动，极径又作匀角速旋转时动点的轨迹。设动点的初始位置到极点o的距离为ρ0，则螺线的极坐标方程为ρ=ρ0+aθ，其中a为常数。当ρ０=0时，方程变为ρ=aθ，这时极径和极角成正比。阿基米德螺线在机械凸轮设计中有广泛的应用。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条