1·The shear changed the quadrilateral into a parallelogram.
四边形被剪成了平行四边形。
2·The quadrilateral area coordinate is adopted instead of the isoparametric coordinate.
采用四边形面积坐标来代替等参坐标。
3·Based on the geometrical nonlinear finite element (GNFE) theory, a curved quadrilateral isoperimetric element with 8 nodes for initial form analysis of tensile membrane structures is presented.
本文根据几何非线性有限元理论，提出张力膜结构初始形态分析的8结点曲面四边形等参单元。
4·Using acoustic equation, the paper conducts spline interpolation for step surface data and results in quadrilateral grid partition coincident with relief surface.
本文利用声波方程，对阶梯状地表数据进行样条插值处理，得到了与起伏地表比较吻合的四边形网格剖分。
5·You will understand two color pattern of the Left, the triangle is smooth coloring, with the quadrilateral plane coloring.
你将理解两种着色模式，在左图中，三角形用的是光滑着色，四边形用的是平面着色。