In the process of PA computation, condition number of matrix D T D is 2.5 × 1011, so Eq. (32) is seriously ill-conditioned and yields a biased solution if not processed.
Since computation time was slightly affected by computational condition of the hardware, minor discrepancy appeared definitely during each computational process.
It contains the computation conditions and network parameters of the power grid.
An experimental design of algorithm settings was performed to find the optimal computation conditions.
The computation conditions are as follows: The grid spacing is 6.5 cm along the direction across the flow, 6 cm along the flow direction, and 3 cm in the vertical direction.
Their computation speed was extremely slower than the others under the same computational conditions (see Section 4).
It is also shown that, under the closely computation load condition, the proposed RR GSC scheme possesses superiority than the traditional JDL.
Clearly, T5 > T2, thus node 2 requires the N6 and N4, and by computation the condition ∀v ∈ G i, ∃black node u, v ∈ N u is not met and node 2 stays black.
Table 2 shows a comparison among accuracy levels for each scenario expressed by the mean value and standard deviation of the difference between measured data and simulated results, in addition to the time needed for computation (on condition that 109 rays were launched).
From Figures 2 and 3, we observe that the performance of the subspace method deteriorates for channel B. This is expected since by computation, the condition number of H 0) for channel B =47.18) is larger than that of channel A(=12.69), which means H 0) for channel B is closer to singularity (rank deficiency) and tends to violate the identifiability condition of the subspace method ([21], p. 1422).
