One approach is to filter by journal.
- The so-called 'American Journal of Engineering Research' (article 1)
- The 'Academy & Industry Research Collaboration Center' (AIRCC, publisher of the 'International journal of wireless & mobile networks', article 2)
- The 'Association of Computer Electronics and Electrical Engineers' (ACEEE, publisher of the 'International Journal of Latest Trends in Engineering and Technology', article 3)
The so-called 'American Journal of Engineering Research', the 'Academy & Industry Research Collaboration Center (AIRCC, publisher of the "International journal of wireless & mobile networks"), the "Association of Computer Electronics and Electrical Engineers (ACEEE, publisher of the "International Journal of Latest Trends in Engineering and Technology") are all predatory publishersfake journals and 'predatory publishers' as listed by Jeffrey Beall's list.
This means that no scrutiny was applied in the publishing process, in fact there was no editorial process whatsoever, and thus instances of plagiarism are to be expected. I would recommend not to cite anything found in these pseudo-journals.
The other cueclue is the publication date obviously. The IEEE mark does not constitute an insurance of quality in itself, as pointed out by Anonymous Math. but I would say that it is your best shot in this case.