Research Article
Determination of Fetal State from Cardiotocogram Using LS-SVM with Particle Swarm Optimization and Binary Decision Tree
Table 2
Features used for determining the fetal state.
| Features | ā |
| LB | FHR baseline (beats per minute) | AC | Number of accelerations per second | FM | Number of fetal movements per second | UC | Number of uterine contractions per second | DL | Number of light decelerations per second | DS | Number of severe decelerations per second | DP | Number of prolonged decelerations per second | ASTV | Percentage of time with abnormal short term variability | MSTV | Mean value of short term variability | ALTV | Percentage of time with abnormal long term variability | MLTV | Mean value of long term variability | Width | Width of FHR histogram | Min | Minimum (low frequency) of FHR histogram | Max | Maximum (high frequency) of FHR histogram | N
max | Number of histogram peaks | N
zeros | Number of histogram zeros | Mode | Histogram mode | Mean | Histogram mean | Median | Histogram median | Variance | Histogram variance | Tendency | Histogram tendency |
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