曲面

The hoisting technique with button pole group was applied smoothly for installing the latticed shell with elliptic surface at Yuncheng Agriculture Exhibition Center.

运城市农业会展中心椭圆曲面网壳结构安装，采用了以拔杆集群为主的吊装方法，保证了工程的顺利完工。

To improve the machining efficiency and precision of convex screws,a new method was put forward for inner whirlwind NC enveloping milling of screw curved surface.

为提高凸螺杆的加工效率和加工精度，将具有切削平稳、效率高等特点的传统旋风铣削技术与具有轨迹控制灵活等特点的数控技术相结合，提出了内旋风数控包络铣削螺杆螺旋曲面的新方法。

We build the model for the enveloping worm helix parametric equation and then analyze its relations with the enveloping worm helix tooth surface equation,thus establishing the characteristic model of the involute helicoid enveloping worm′s generative gears.

渐开面环面蜗杆的三维构建属复杂曲面造型，文章在环面蜗杆螺旋线参数方程建模的基础上，分析讨论了其与渐开面环面蜗杆螺旋齿面方程的对应关系，建立了渐开面包络环面蜗杆产型齿的特征模型。

It is governed by the equation of continuity and momentum for the liquid in cylindrical coordinates with axial symmetry, the isentropic equation of state for water.

曲面头部的水弹高速冲击刚性表面的流体动力学问题，可以归结为无粘性、可压缩的不定常流动问题，受轴向对称园柱座标的连续和动量方程、水的等熵状态方程支配。

A new algorithm for tracing equiangular curves is presented to improve the machining quality of free-form surfaces.

为了提高自由曲面加工质量，提出一种等斜率曲线跟踪算法。

So the return is realized from equidistant surface to real measurement surface.

针对不同的二次曲面本文提出了不同的误差评定方法。

On the basis of measured data processing,error analysis,curve modeling and object modeling,it establishes the mathematical modeling of the screw parts of single screw compressors.

在测量数据处理、误差分析和曲线曲面造型、实体造型技术的基础上，建立了单螺杆空气压缩机螺杆零件的数学模型。

In this paper, this constraint is discussed. For the space curve with length constraint and the surface of revolution area constraint, algorithms and estimation of the error are given.

本文就此进行了讨论，对有弧长约束的空间曲线及有面积约束的旋转曲面问题，分别给出了相应的算法及误差估计。

In this course we will introduce the basic properties about curves and surfaces in three dimensional Euclidean space.

课程目的：介绍空间中之曲线与曲面的相关理论。

ObjectiveTo optimize the extraction condition for Eupatorium adenophorum Spreng by response surface methodology.

目的利用响应曲面法研究从紫茎泽兰中提取黄酮的最佳工艺条件。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。