1. The implementation method in the experiment process does not conform to the theoretical assumption. There may be some method details that are not well grasped or influenced by other experimental factors.

2. The collection, analysis and processing of experimental data are not rigorous enough. This may also lead to the deviation between the experimental results and the theory.

3. The theoretical hypothesis is imperfect or incorrect, which needs further study and adjustment.

The theory and experiment of the paper can't match, so it is suggested to read the paper carefully and re-examine the experimental methods and data to determine whether the results are closer to the theoretical model. If there are still inconsistencies, you can correct the mistakes and re-experiment, or analyze and discuss with other research results.