Table 8 Results from the application of raw and minimum–maximum preprocessing for 28-day compressive strength by using DAVO algorithm.

7-day compressive strength	Neuron number	30	60	90	120	150	180	210	240	270	300
MSE test	Raw	88.20	110.30	75.86	53.74	55.03	129.90	45.91	173.75	49.89	94.98
MSE test	Min–Max	53.79	110.30	75.86	51.54	55.04	129.90	45.97	173.74	43.64	94.98
MSE train	Raw	77.40	92.97	74.19	52.70	56.02	107.24	48.63	160.13	50.18	89.82
MSE train	Min–Max	63.76	92.97	74.19	50.58	56.14	107.24	49.73	160.13	41.73	89.82
R test	Raw	0.85	0.81	0.87	0.91	0.91	0.77	0.92	0.69	0.92	0.84
R test	Min–Max	0.91	0.81	0.87	0.91	0.91	0.77	0.92	0.69	0.93	0.84
R train	Raw	0.87	0.85	0.88	0.91	0.91	0.82	0.92	0.73	0.92	0.85
R train	Min–Max	0.89	0.85	0.88	0.92	0.91	0.82	0.92	0.73	0.93	0.85

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