double line swivel pen是什么意思

用法例句

The normal university synthesizes the stadium roof covering、the eaves list、the hyperbolic aluminum veneer design;

师大综合体育馆屋面、檐口单、双曲铝单板设计

Design of single layer hyperbolic compositereticulated shell with flat-type;

单层双曲扁组合网壳设计

Quadratic hyperbolic B-spline curves with a shape parameter;

二次带形状参数双曲B样条曲线

A new hyperbolic functions method for finding exact solutions of nonlinear partial differential equations;

寻找非线性演化方程精确解的新的双曲函数法

The control strategy based on hyperbolic function is proposed and relative mathematical model is built.

为此讨论了车辆变速行为的一般规律,提出基于双曲函数的车辆变速控制策略,建立了相应的数学模型,并针对实例进行了具体分析。

The shear moduli in two directions were assumed to vary in terms with hyperbolic function.

假设剪切模量沿着梯度方向都按双曲函数变化,采用积分变换-对偶积分方程方法,求得了裂纹尖端应力场和应力强度因子,并研究了材料不均匀参数对应力强度因子的影响。

Application of simple partial least squares regression to hyperbolic decline curve;

单因变量的偏最小二乘法在双曲递减中的应用

The Arps hyperbolic decline curve is used to predict the production declining.

为了快速、准确地预测油田调整后的产量,文章结合递减曲线和增长曲线的优点,利用Arps双曲递减曲线预测油田调整前正在递减的产量,利用W eibull增长曲线预测油田调整后产量的变化,对飞雁滩油田三采效果进行了预测,并与其他预测结果对比分析,认为该方法预测结果可信度较高,且具有简单易行、人为因素影响小的特点。

This paper analysed every solving method of Arps Hyperbolic decline equation,pointed out their respective shortcomings, and them presented a new method which solves equation.

Ａｒｐｓ双曲递减方程各种求解方法进行了分析、研究，指出了各自的不足，同时提出了方程求解的一种新方法。

Applications of steel ball division degree in double crank shaft jig;

钢球分度在双曲柄轴夹具上的应用

The shape formed by projection of correlation line of rotative surface on which two axises Intersect by meahs of analytical method is discussed,and some related characterlstles of hyperbolic curve,on the basis of which are given some ideas about making a drawing by correlationline projection are analysed and the actual drawing process is illustrated.

用解析法探讨了两轴线相交的回转面的相贯线投影的形状，分析了双曲线的一些相关特性，在此基础上给出了相贯线投影作图的新思路；利用实例说明了具体的作图过程。