Inconsistent detection algorithms: Different duplicate checking systems use different algorithms for detection, so the detection results may be different. If the algorithm is rigorous, the detection results of the paper will be more accurate. But if the algorithm is loose, the detection result of the paper will be lower than the reality.

Inconsistent detection range: Different duplicate checking systems may only detect part or full text, so the detection results may be different. And different duplicate checking systems may have differences in the details of the detection range, such as punctuation, capitalization and so on.

Similarity of paper content: Different papers may be different, so the test results may be different.

Inconsistent databases: Different duplicate checking systems use different databases for detection, so the detection results may be different.

System performance: Different duplicate checking systems may have different performance, so the detection results may be different.

In order to ensure the accuracy of the results, it is recommended to choose the duplicate checking system carefully and not to replace the system easily. The repetition rate of each duplicate checking system is different, so paperless paper duplicate checking system can be used.