When llk (k steps left) is the maximum P450 Inhibitors value of similarity level in m similarity level (ll1, ll2,…, llm) of the left translation transformation, then Xj+1′ and Xj′ have the greatest similarity when Xj+1′ moves the distance of k measuring points to the left. Since Xj+1′ and Xj′ are obtained by transformation of Xj+1 and Xj; therefore, the position of Xj and Xj+1 has the maximum coherence after Xj+1 moves the distance of k measuring points to the left, and data mileage between

Xj and Xj+1 is corrected to be aligned with each other. When lrp (p steps right) is the maximum value of similarity level in m similarity level (ll1, ll2,…, llm) of the left translation transformation, then Xj+1′ and Xj′ have the greatest similarity when Xj+1′ moves the distance of p measuring points to the left. Due to the fact that Xj+1′ and Xj′ are obtained by transformation of Xj+1 and Xj, therefore, the position of Xj and Xj+1 has the maximum coherence after Xj+1 moves the distance of p measuring points to the right, and data mileage between Xj and Xj+1 is corrected to be aligned with each other. According to experience, the value range of m is generally set from 40 to 100. Two adjacent inspections

sequences can be calibrated by translation transformation through finding the position of the maximum value of the similarity level of two adjacent sequences. If the overall mileage data of n times inspection data at section is calibrated, a certain time inspection data can be set as a reference data sequence (generally first inspection data is selected), and other sequences do translation transformation according to the position of the maximum value of the similarity

level of two adjacent inspection sequences data. The statistics table of similarity level and translation transformation distance is shown in Table 1. Table 1 Statistics table of similarity level and mileage correction distance. After calibration, the distribution of two adjacent gauge inspection data of sections is shown in Figure 12. Figure 12 Distribution of gauge irregularity inspection data from February 20, 2008, to June 11, 2008, after mileage correction. Distribution of gauge Drug_discovery irregularity data of July 24, 2008 and August 16, 2008 is shown in Figure 13. Figure 13 Distribution of details of correction of gauge irregularity inspection data between July 24, 2008, and August 16, 2008. It should be noted that the mileage offset correction in this study here is a relative correction, because the first inspection sequence is set as a reference sequence in the correction process, and the mileage data is assumed to be with no offset. But the reality is that there is also mileage offset of the reference sequence compared to real mileage data.