A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.
抛物面一种有与单坐标轴平行的抛物截面和与该轴垂直的椭圆截面的平面。
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Based on the method of Dyadic Greens functions, the radiation patterns of the microstrip antennas printed on the surface of elliptic cylinder are analysised and calculated in this paper.
A simple formula for calculating pure shear strength of concrete is derived on the basis of the verified mathematical model of concrete failure surface, the elliptic paraboloid.