A Grey-BPNN Model for Evaluating the Competitiveness of Chinese Contractors in the High-Speed Rail Market in Europe

Table 4

Error of the BPNN.

Number	Target output	Network output	Relative error
9	0.4437	0.4422	−0.0033
10	0.3651	0.3652	0.0003
12	0.24841	0.2496	0.0047
13	0.4363	0.4340	−0.0053
20	0.2541	0.2487	−0.0214
24	0.3025	0.2886	−0.0459
39	0.1807	0.1792	−0.0080
57	0.2259	0.2255	−0.0020
66	0.1615	0.1641	0.0161
95	0.1039	0.1041	0.0018
118	0.0841	0.0848	0.0080
122	0.0954	0.0963	0.0092