Table 2.
The parameters of the “measured vs. predicted” plots for partial least squares (PLS) regression models predicting water toxicity in terms of Daphnia magna (death rate 0–100%) from the multisensor system response.
| Experimental Layout/Results | Slope | Offset | RMSE | R2 |
|---|---|---|---|---|
| Before ultrasonic treatment (20 samples) | ||||
| Calibration | 0.95 | 2.2 | 7 | 0.95 |
| Segmented cross-validation (7 segments 3 samples, 7 LV, 88.59% of explained variance in Y) |
0.76 | 9.3 | 21 | 0.65 |
| After ultrasonic treatment (20 samples) | ||||
| Calibration | 0.93 | 1.2 | 5 | 0.93 |
| Segmented cross-validation (7 segments 3 samples, 5 LV, 90.35% of explained variance in Y) |
0.83 | 5.1 | 11 | 0.69 |