## 3 Results and Discussion
### Preprocessing of Gas Monitoring Data
#### 3.2.2 Pretreatment of NH\({}_{3}\) and H\({}_{2}\)S Concentration Data
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c} \hline \hline  & & **0.5** & **1.0** & **1.5** & **2.0** & **2.5** & **3.0** & **3.5** & **4.0** & **4.5** & **5.0** & **5.5** & **6.0** & **6.5** & **7.0** \\ \hline \multirow{4}{*}{Rawdata} & \(\frac{\delta}{C}\) & 16.767058 & 22.114135 & 34.389991 & 42.741861 & 33.369988 & 46.982645 & 55.982708 & 52.98528 & 52.985304 & 66.687809 & 66.830041 & 64.984631 & 73.981802 & 102.485530 & 18.011266 \\  & \(\frac{\delta}{C}\) & 17.770783 & 37.080224 & 50.848537 & 62.62343 & 4.406917 & 73.259108 & 61.901134 & 73.739156 & 86.89291 & 69.13288 & 12.102307 & 11.027913 & 135.069094 & 175.61281 \\  & CV & 0.945308 & 0.854993 & 0.681897 & 0.862809 & 0.757127 & 0.641322 & 0.904462 & 67.46748 & 0.698255 & 0.695193 & 0.352021 & 0.671165 & 0.788809 & 0.667173 \\  & C\({}_{\rm max}\) & 47.977712 & 84.900503 & 105.979206 & 113.226230 & 123.215786 & 15.9738219 & 250.106574 & 227.106699 & 216.635426 & 289.9893732 & 39.964043 & 309.30754 & 409.097315 & 404.970315 & 448.512967 \\ \hline \multirow{4}{*}{Repair} & 16.761624 & 22.911914 & 42.309844 & 42.623703 & 23.769412 & 41.2268035 & 52.724927 & 55.986970 & 69.494863 & 60.316471 & 50.381177 & 27.458227 & 28.729624 & 10.200804 \\  & C\({}_{\rm max}\) & 77.762695 & 37.784827 & 50.477275 & 50.46944 & 55.346273 & 66.916222 & 51.959585 & 50.95098 & 50.95098 & 50.95098 & 50.95098 & 50.95098 & 51.491909 & 40.122408 & 25.924504 & 0.46727195 \\  & C\({}_{\rm max}\) & 0.941086 & 0.582010 & 0.697702 & 0.824598 & 0.664533 & 0.637570 & 0.899327 & 0.666041 & 0.651541 & 0.694272 & 0.490654 & 0.658769 & 0.658089 & 0.626585 \\  & C\({}_{\rm max}\) & 47.607156 & 74.811119 & 0.9464508 & 113.262000 & 122.63174 & 132.52078 & 106.2992975 & 17.858287 & 173.959145 & 177.27643 & 186.669919 & 129.128482 & 255.421700 & 307.945418 \\ \hline \multicolumn{10}{c}{In the table, is the standard deviation of N\({}_{\rm H}\) concentration data; \({}^{\rm h}\) in the average concentration of N\({}_{\rm H}\)C V is the coefficient of variation of the N\({}_{\rm H}\) concentration data; \({}^{\rm h}\) in the minimum value of the N\({}_{\rm H}\) concentration data.} \\ \hline  & & **0.5** & **1.0** & **1.5** & **2.0** & **2.5** & **3.0** & **3.5** & **4.0** & **4.5** & **5.0** & **5.5** & **6.0** & **6.5** & **7.0** \\ \hline \multirow{4}{*}{Rawdata} & \(\frac{\delta}{C}\) & 0.0342488 & 0.044883 & 0.098694 & 0.225369 & 0.2959643 & 0.414985 & 0.449954 & 0.519918 & 0.563922 & 0.714399 & 0.909262 & 1.120077 & 1.628029 & 1.636846 \\  & C\({}_{\rm max}\) & 0.166070 & 0.160989 & 0.244049 & 0.999409 & 0.9799576 & 1.003033 & 0.1023471 & 1.460727 & 1.0056426 & 2.169511 & 2.791567 & 3.104072 & 3.306959 \\  & CV & 0.206214 & 0.278757 & 0.404454 & 0.966339 & 0.518894 & 0.440772 & 0.503566 & 0.405099 & 0.9965361 & 0.419190 & 0.421026 & 0.524540 & 0.465405 \\  & C\({}_{\rm max}\) & 1.090918 & 0.207953 & 0.322143 & 0.666502 & 0.7575083 & 1.2177876 & 1.426353 & 1.628936 & 1.875821 & 2.404795 & 3.192408 & 3.758756 & 4.769833 & 5.094600 \\ \hline \multirow{4}{*}{Repair} & \(\frac{\delta}{C}\) & 0.034248 & 0.044809 & 0.098694 & 0.262085 & 0.2959641 & 0.4149636 & 0.449953 & 0.5197707 & 0.563070 & 0.688960 & 0.9880820 & 1.18932516 & 1.521402 & 16.33315 \\  & C\({}_{\rm max}\) & 0.166080 & 0.16101 & 0.240410 & 0.449159 & 0.994959 & 0.999459 & 0.9977808 & 1.00032544 & 1.407855 & 1.818383 & 2.1626927 & 2.8879200 & 3.5114200 \\ \cline{1-1}  & CV & 0.206202 & 0.278243 & 0.4044851 & 0.495531 & 0.649925 & 0.518847 & 0.440770 & 0.5039344 & 0.400331 & 0.378741 & 0.418955 & 0.35290 & 0.470936 & 3.465146 \\ \cline{1-1}  & C\({}_{\rm max}\) & 0.190751 & 0.207947 & 0.322159 & 0.666285 & 0.755245 & 1.218584 & 1.426305 & 1.628952 & 1.875854 & 2.406163 & 3.192408 & 3.758756 & 4.769833 & 5.094600 \\ \hline \hline \end{tabular}  
* In the table, is the standard deviation of N\({}_{\rm H}\) concentration data; \({}^{\rm h}\) in the average concentration of N\({}_{\rm H}\)C V is the coefficient of variation of the N\({}_{\rm H}\) concentration data; \({}^{\rm h}\) in the minimum value of the N\({}_{\rm H}\) concentration data.  
\end{table}