它进一步说明一个四元流形的截面曲率的估计对许多对称黎曼空间都是有效的。
It proves that the estimate sectional curvature of a quaternion manifold is very useful for Riemann symmetric space.
考虑桩周土体及桩–土接触的非线性，建立了空间轴对称有限元模型；
The spatial axisymmetric finite element model is established considering the nonlinear of the soil and the interface between pile and soil.
最后，证明了在一些经典赋范空间中对称性的双正交元存在。
Finally, the existence of symmetry biorthogonal elements in some classical normed Spaces is proved.
基于强度折减法，将空间问题简化为平面轴对称问题，利用有限元方法对圆形基坑的稳定性问题进行了分析。
Based on strength reduction method, simplified the space problem as plane axisymmetric problem, the finite element method is used to evaluate the base stability of circular foundation pit.
得出了二元喷管的红外辐射强度的空间分布，并且将二元喷管和轴对称喷管的红外辐射强度进行了比较。
The spatial distributions of the infrared radiation intensity of 2-D nozzles have been obtained, and compared with that of the axially symmetric nozzles.
空间上采用有限元线法进行半离散化，采用已有的轴对称单元、平面单元；
Using Finite Element Method of Lines smash the area in semidiscretization with plane or axial symmetry element which is develop by the postgraduate last session;
空间上采用有限元线法进行半离散化，采用已有的轴对称单元、平面单元；
Using Finite Element Method of Lines smash the area in semidiscretization with plane or axial symmetry element which is develop by the postgraduate last session;
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