## 4 Experiment Evaluation
### Experimental Analysis
#### 4.3.1 Base Classifiers Performance Analysis
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Detector** & **Classifier** & **Sine** & **Mixed** & **LED** & **Circles** & **Rank** \\ \hline \multirow{2}{*}{FHDDM} & NB & 86.5915 \(\pm\) 0.5237 & **83.2989 \(\pm\) 0.0728** & 89.3133 \(\pm\) 0.0813 & 83.7427 \(\pm\) 0.1678 & \multirow{2}{*}{7.13} \\  & HT & 86.8120 \(\pm\) 0.1980 & **83.2227 \(\pm\) 0.2028** & 89.3037 \(\pm\) 0.0806 & 86.5965 \(\pm\) 0.1115 & \multirow{2}{*}{7.13} \\  & NB & 85.9646 \(\pm\) 0.5256 & 83.2366 \(\pm\) 0.0831 & 89.3212 \(\pm\) 0.0907 & **83.7970 \(\pm\) 0.1623** & \multirow{2}{*}{6.63} \\ MWDDM & HT & 86.8369 \(\pm\) 0.2981 & 83.0172 \(\pm\) 0.1066 & 89.3110 \(\pm\) 0.0885 & 86.5915 \(\pm\) 0.0640 & \multirow{2}{*}{6.63} \\  & NB & 85.9628 \(\pm\) 0.5300 & 83.2957 \(\pm\) 0.0743 & 89.3206 \(\pm\) 0.0767 & 83.7625 \(\pm\) 0.1770 & \multirow{2}{*}{5} \\ MDDM & HT & 86.8190 \(\pm\) 0.1840 & 83.1730 \(\pm\) 0.1798 & 89.3110 \(\pm\) 0.0759 & **86.6351 \(\pm\) 0.0598** & \multirow{2}{*}{5} \\  & NB & 85.9625 \(\pm\) 0.1695 & **83.2989 \(\pm\) 0.0728** & 89.3135 \(\pm\) 0.0813 & 83.7444 \(\pm\) 0.1695 & \multirow{2}{*}{6.13} \\ WMDDM & HT & 86.8614 \(\pm\) 0.2239 & 83.1991 \(\pm\) 0.1754 & 89.3040 \(\pm\) 0.0805 & 86.6007 \(\pm\) 0.1122 & \multirow{2}{*}{7.88} \\ BDDM & NB & 85.9689 \(\pm\) 0.5286 & 83.2922 \(\pm\) 0.0741 & 89.3212 \(\pm\) 0.0907 & 83.7465 \(\pm\) 0.1520 & \multirow{2}{*}{7.38} \\  & HT & 86.8305 \(\pm\) 0.1907 & 83.1371 \(\pm\) 0.2801 & 89.2979 \(\pm\) 0.0849 & 86.1249 \(\pm\) 0.1678 & \multirow{2}{*}{7.88} \\ RDDM & NB & 85.8188 \(\pm\) 0.1660 & 83.1541 \(\pm\) 0.1133 & **89.3839 \(\pm\) 0.0894** & 83.6955 \(\pm\) 0.1660 & \multirow{2}{*}{8.38} \\  & HT & 86.5227 \(\pm\) 0.2134 & 82.9513 \(\pm\) 0.1341 & **89.3752 \(\pm\) 0.0855** & 86.5066 \(\pm\) 0.0397 & \multirow{2}{*}{8.38} \\  & NB & 85.8211 \(\pm\) 0.4886 & 83.2351 \(\pm\) 0.0453 & 89.3482 \(\pm\) 0.0949 & 83.7432 \(\pm\) 0.1408 & \multirow{2}{*}{7.38} \\ HDDM\_A & HT & 86.7317 \(\pm\) 0.1770 & 83.1645 \(\pm\) 0.0627 & 89.3393 \(\pm\) 0.0941 & 86.4497 \(\pm\) 0.1678 & \multirow{2}{*}{7.38} \\ HDDM\_W & NB & 85.9647 \(\pm\) 0.5331 & 83.2400 \(\pm\) 0.0617 & 89.3176 \(\pm\) 0.0890 & 83.7967 \(\pm\) 0.1614 & \multirow{2}{*}{7} \\ HDDM\_W & HT & 86.7525 \(\pm\) 0.2781 & 83.1022 \(\pm\) 0.1254 & 89.3083 \(\pm\) 0.0881 & 86.6021 \(\pm\) 0.0424 & \multirow{2}{*}{7} \\  & NB & 83.7927 \(\pm\) 2.3258 & 81.0950 \(\pm\) 3.5314 & 89.3312 \(\pm\) 0.0876 & 83.1943 \(\pm\) 0.06260 & \multirow{2}{*}{7} \\ DDM & HT & 86.4267 \(\pm\) 0.1591 & 82.6847 \(\pm\) 0.2447 & 89.3130 \(\pm\) 0.0902 & 86.4353 \(\pm\) 0.0710 & \multirow{2}{*}{10.12} \\ VFDDM\_K & NB & 85.9654 \(\pm\) 0.5331 & 83.2951 \(\pm\) 0.0735 & 89.3246 \(\pm\) 0.0927 & 83.7575 \(\pm\) 0.1732 & \multirow{2}{*}{**3.5**} \\ VFDDM\_K & HT & **86.8762 \(\pm\) 0.1915** & 83.1720 \(\pm\) 0.1888 & 89.3147 \(\pm\) 0.0904 & 86.6171 \(\pm\) 0.0455 & \multirow{2}{*}{**3.5**} \\  & NB & **85.9695 \(\pm\) 0.5295** & 83.2937 \(\pm\) 0.0753 & 89.3246 \(\pm\) 0.0927 & 83.7601 \(\pm\) 0.1729 & \multirow{2}{*}{**3.63**} \\ VFDDM\_H & HT & **86.8762 \(\pm\) 0.1915** & 83.1583 \(\pm\) 0.1491 & 89.3147 \(\pm\) 0.0904 & 86.6155 \(\pm\) 0.0448 & \multirow{2}{*}{**3.63**} \\ VFDDM\_M & NB & 85.9684 \(\pm\) 0.5302 & 83.2938 \(\pm\) 0.0755 & 89.3246 \(\pm\) 0.0927 & 83.7619 \(\pm\) 0.1763 & \multirow{2}{*}{**3.88**} \\  & HT & **86.8762 \(\pm\) 0.1915** & 83.1550 \(\pm\) 0.1530 & 89.3147 \(\pm\) 0.0904 & 86.6153 \(\pm\) 0.0449 & \multirow{2}{*}{**3.88**} \\ \hline \hline \end{tabular}
\end{table} 
Table 2: The average accuracy performance of base classifiers using different drift detectors on the synthetic datasets (The best results are highlighted in bold). points in the abrupt drift dataset and 3 drift points in the gradual drift dataset. The performance variation of base classifiers using different drift detectors at drift positions can be clearly compared from the graphs. Figure 7 illustrates the accuracy trends of NB using different drift detectors on four synthetic datasets.