GPS GPS GPS iBeacon APP iBeacon iOS iBeacon 2013 iOS7 iBeacon iBeacon iBeacon iBeacon /... [查看详情]
Trilateration (x1, y1), (x2, y2), (x3, y3) (x0, y0) d1, d2, d3 d1, d2, d3 ( x1 - x0 )2 + ( y1 - y0 )2 = d12 ( x2 - x0 )2 + ( y2 - y0 )2 = d22 ( x3 - x0 )2 + ( y3 - y0 )2 = d32 (x, y) P1 (0, 0)P2 (d, 0)P3 (i, j) r1, r2, r3z r12 = x2 + y2 + z... [查看详情]
