Table 1: Input and output of the two-phase geometric buildup algorithm.

number of anchors.
number of all the sensors, including anchors.
: original coordinates matrix of all sensors.
: radio range.
noise factor: .

: average CPU time in seconds over five cases except the time to generate the test problems.
 NumUndet: average number of undetermined sensors.
 RMSD: average root-mean-square deviation defined in (3.2).