As you know, verification the results is an important step of the paper. sometimes the results of the paper and references are not coincident. What would you do if the results of your paper were not match with the results of the references?
First of all, you have to check and recheck your results again and again if several references from different authors gave the same results that differ from yours.
Second, you have to carefully check the circumstances, conditions and hypothesis in which the results of the references are obtained compared to yours. Note that some papers does not give enough details on how the results are obtained due to space limitation; in this case, you can contact the authors of references asking for details, especially for implementation details or specific parameters used for their experimentations if any.
All the differences between the results should finally be reported in the paper explaining why the results do not match.
After all, your results need to be well justified and replicable.
Finally, note that some results cannot simply be trusted especially in specific domains where replication is hard to be done such as chemistry and recently in data science; it depends on the source where the reference is published and the experience of the authors.
I agree that sometimes it is quite difficult to get the same result as reported in the reference paper. It will be better if you can reverify whether everything(every single detail ) that you have consider is same as mentioned in the reference paper or not.
Moreover, you can also contact the authors of the paper to help you in the implementation.
After everything even if you won't get the extact same result, please try to state the results that you have achieved by your experiments and also describe every assumptions that you have taken to do the experiments in your paper.
You don't have to do anything, if your results are correct and the paper has been accepted, apart from suggesting in the Discussion why there is a difference
.. plus you could as well look into the discussions of those reference papers - typically they will give reasons for variances, uncertainties, and parameters that need further investigation.
dear colleague, if your own results are concordant with the references you cited in your study, then, you did nothing new in the field of research. therefore, work on your results more than once and just think of submitting original ones.
Research means a search for knowledge, a careful investigation through search for new facts in any branch of knowledge, a movement from known to unknown. The aim of research is to find out the truth which has not been discovered yet. The research results can be verified by replicating the study, thereby building a sound basis for decision. If it matches with the results of other scientists it might be considered as repetition. But if it does not match with the result of others, then be confident in yours and think that you have found out something new on the aspect.
When I read the answers, it seems that there is a difference in the direction of the answers, although it is one question (but I don't mean to say they're false or incorrect).
Dr. Mohsen Rahmani
If you say that the results of your proposed approach are not concordant with the results of the references, I think that Dr. Munira Nasiruddin and Dr. Amjed L. Jabbar have answered you.
But if you want to say that the results of your implementation of the reference approaches are not corresponding to the results published in their article, I think other colleagues have answered you.
When doing research will depend on the data and hypothesis that you need to formulate and from the given source will be your reliable data to build your paper confident. I think other guys here gave their points reasonable like Dr. Munira Nasiruddin and Dr. Amjed L. Jabbar in their statements.