通过分析拖拉机车身及其冲压成形的特点，结合柱面扁壳及球面扁壳件，建立一套扁壳类零件刚度的试验分析系统。
The system of stiffness test analysis is created by analyzing the shapes and forming processes of tractor body panels, of which based on cylindrical shallow shells and spherical shells.
最后由空间第一类机构与球面四杆机构的等效性，阐述了将此识别方法应用于第一组空间机构的方法。
Rotation angle symbol method to identify circuit and branch of spherical four bar is presented in this paper. Finally, the method about application to spatial first group mechanism is elaborated.
本文利用移动球面法证明了一类半线性椭圆型方程组正解的存在性与不存在性。
Existence and nonexistence of positive solutions for a class of semilinear elliptic systems are considered via the method of moving spheres.
第一类是由一块非球面反射镜和分别放置在它的前面和焦点前的两块非球面薄板组成的。
The first type consists of an aspheric mirror and two thin aspheric correcting plates, which are located in front of the mirror and its focus respectively.
讨论一类映入球面的满足拟单调不等式的弱调和映射的边界正则性。
The boundary regularity for a class of weakly harmonic maps which maps into sphere and satisfies a quasi monotonicity inequality is discussed.
将亏格为零的三维模型进行球面参数化的方法大致可以分成3类：(1)基于累进网格的方法(2)球面松弛的方法(3)保角参数化方法。
These methods can be divided into three: (1) method based on progressive mesh (2) method based on sphere relaxation (3) conformal method. The three methods have their own advantages and shortcomings.
公司主要经营外球面轴承、零类深沟球轴承、七类圆锥滚子轴承。
The core products are insert bearing, deep groove ball bearing, tapered roller bearing.
公司主要经营外球面轴承、零类深沟球轴承、七类圆锥滚子轴承。
The core products are insert bearing, deep groove ball bearing, tapered roller bearing.
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