Research Article

Operational Efficiency Evaluation of Iron Ore Logistics at the Ports of Bohai Bay in China: Based on the PCA-DEA Model

Table 6

Characteristic vectors of the input and output indicators (column vector).

IndicatorCharacteristic vector of the input indicators IndicatorCharacteristic vector of the output indicator
123412

−0.3550.2040.1650.0220.5930.063
−0.1670.357−0.1880.3040.0390.789
0.372−0.2990.146−0.0620.6260.314
0.4310.239−0.222−0.0530.505−0.524
0.0550.390−0.4740.219
0.3850.1910.273−0.414
0.3060.405−0.172−0.053
−0.0310.4450.401−0.142
−0.1410.3650.453−0.048
0.481−0.0210.1150.285
0.158−0.0220.4000.758