球极平面投影 [测] stereographic projection
球极坐标 [数] spherical polar coordinates ; spherical coordinates
球极投影 stereographic projection
球极平面射影 [测] [数] stereographic projection
四球极压试验机 four-ball extreme pressure tester
球极平面投影图 stereographic diagram
地球极半径 polar radius
希帕查斯球极平面射影 Hipparchus' Stereographic Projection
球极角 spherical polar angle
全球极值 global extrema
借助于四维坐标的球极平面投影验证SO(4,2)与SU(2,2)间的同态特性。
Demonstrated Homomorphic Characteristic Between SO (4, 2) and SU (2, 2) by Stereographically Projecting of Four-dimensional Coordinates.
基于球极投影保持PH性质这一特性，通过球极投影把球面数据投影到平面上，构造一条平面PH曲线。
Based on the stereographic projection that preserves Pythagorean-Hodographs, a spherical rational ph curve is constructed to solve this problem.
而今年的水晶球则采用了节能技术，球体外表覆盖着一层沃特福德水晶，内置9576个发光二极管，发出五彩的光芒。
This year's event featured an energy-efficient sphere clad in Waterford crystals, with 9,576 light-emitting diodes that generated a kaleidoscope of colors.
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