... 壳体属于面结构，可单向，双向弯进，或成双曲抛物面（hyperbolic paraboloid）的形式。 Shells are surface structures which are curved in one of two directions or are warped as in hyperbolic parabolo...
The authors show that the hyperboloid of one sheet and the hyperbolicparaboloid are ruled surfaces.
作者证实：单叶双曲面和双曲抛物面是直线曲面。
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The authors show that the hyperboloid of one sheet and the hyperbolicparaboloid are ruled surfaces.
单叶双曲面和双曲抛物面是直线曲面。
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After 10 years of research, they proved earlier this year that a curved shape called a hyperbolicparaboloid, which they and others had been folding for years, doesn't actually exist.