1) hyperbolic spiral
双曲螺旋
2) Leptospira biflexa
双曲钩端螺旋体
1.
Cloning, expression and preliminary characterization of a hemolysin gene tlyA from Leptospira biflexa serovar Patoc;
双曲钩端螺旋体溶血素基因tlyA的克隆、表达及初步功能鉴定
3) logarithmic spiral double-curved arch dam
对数螺旋线型双曲拱坝
4) helical curved surface
螺旋曲面
1.
The analytic geometry modeling and CAD drafting of nonprismatic helical curved surface;
变截面螺旋曲面的解析几何建模与CAD绘图
2.
A basis of the workpiece rotation and the change coordinate and helical angle of tool was presented,based on machining principle of helical curved surface.
文章在研究螺旋曲面的加工原理的基础上,提出以工件旋转、刀具的坐标变化以及刀具的螺旋角度变化为基础,按空间包络法计算刀触点轨迹,由四轴插补形成了刀具沿螺旋线方向的进给运动,从而实现了前后两个加工截面之间的螺旋位置关系。
3.
The architecture of compicated helical curved surface NC machining integrated system based on general personal computer is introduced and main functions of each module are discussed in this paper.
文章介绍了一种基于通用PC机的复杂螺旋曲面数控加工集成系统的体系结构及其各模块的主要功能,从界面集成、数据集成和算法集成几方面阐述了系统的开发方法。
5) helical buckling
螺旋屈曲
1.
The governing differential equilibrium equations of semi-static loading model for nonlinear helical buckling of drill string in straight wells are solved by the finite element method.
采用有限元法对直井中钻柱非线性螺旋屈曲准静态加载模型的控制微分方程进行了求解,对钻柱螺旋屈曲准静态加载模型的合理性进行了理论验证,证明了钻柱螺旋屈曲准静态加载问题和特征值问题,力学模型中考虑了钻柱的重力,摒弃了传统分析中的小位移假设。
2.
Based on the principle of minimum potential energy, the helical buckling of a drillstring is studied, with its top end free circumferentially and lower end hinged.
基于最小位能原理,研究了斜直井内钻柱的非线性螺旋屈曲问题。
3.
Consequently,this paper investigates the relationship between the axis force of gravity force under helical buckling,centrifugal force and deviation angle.
通过考虑重力、转速和井斜角对钻柱屈曲的影响,利用能量方法研究了斜直井中轴向载荷、重力和离心力共同作用下钻柱的螺旋屈曲问题,着重研究了重力的轴向分力、转速和井斜角对钻柱屈曲的影响,推导了钻速、井斜角和轴向力间的数学关系表达式。
补充资料：钩曲
1.亦作"钩曲"。 2.弯曲如钩。
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