We have rectangularcoordinates, we have cylindrical coordinates and we have spherical coordinates.
我们有直角坐标系,有柱坐标系和球坐标系。
2
Well, we can do that in rectangularcoordinates dz dx dy where dV becomes something like, maybe, dz dx dy, or any permutation of these.
我们在直角坐标系中处理,在这里dV有可能变成,或者它们的其他排列。
3
One of them is "the interpolation of variable parameters" and the other is the higher order interpolation of rectangularcoordinates of satellites by means of Chebyshev polynomial.