5. Conclusion and future work
With the continuous development of data mining technology, research in multiple data sources mining is becoming more imperative and important. It has a wide range of applications in the fields such as robotics, automation and intelligent system design. This has been and will continue to be a growing interest in the research community to develop more advanced data mining methods and architectures. This paper critically reviewed many useful methods to mine meaningful information and discover new knowledge from multiple data sources: (i) pattern analysis, (ii) multiple data source classification, (iii) multiple data source clustering, and (iv) multiple data source fusion. There are still several challenges in these three effective approaches, which need further research.