# Most-cited Engineering papers of 2019, with free PDFs

The 25 most-cited Engineering research papers published in 2019, ranked by citations in OpenAlex, with their original abstracts and free PDFs where available.

1. [Dynamic Graph CNN for Learning on Point Clouds](https://nerdi.pages.dev/paper/W2979750740) · 7,095 citations · Free PDF
2. [A Vision of 6G Wireless Systems: Applications, Trends, Technologies, and Open Research Problems](https://nerdi.pages.dev/paper/W2981096252) · 4,981 citations · Free PDF
3. [The role of renewable energy in the global energy transformation](https://nerdi.pages.dev/paper/W2911892655) · 4,976 citations
4. [Intelligent Reflecting Surface Enhanced Wireless Network via Joint Active and Passive Beamforming](https://nerdi.pages.dev/paper/W2969424089) · 4,778 citations
5. [Towards Smart and Reconfigurable Environment: Intelligent Reflecting Surface Aided Wireless Network](https://nerdi.pages.dev/paper/W2990747873) · 4,443 citations
6. [Digital Twin in Industry: State-of-the-Art](https://nerdi.pages.dev/paper/W2910597635) · 4,385 citations
7. [Wireless Communications Through Reconfigurable Intelligent Surfaces](https://nerdi.pages.dev/paper/W2968810373) · 3,464 citations · Free PDF
8. [T-GCN: A Temporal Graph Convolutional Network for Traffic Prediction](https://nerdi.pages.dev/paper/W2901504064) · 3,368 citations · Free PDF
9. [Halide Perovskite Photovoltaics: Background, Status, and Future Prospects](https://nerdi.pages.dev/paper/W2919043374) · 3,105 citations
10. [Wireless Communications and Applications Above 100 GHz: Opportunities and Challenges for 6G and Beyond](https://nerdi.pages.dev/paper/W2955897898) · 2,616 citations
11. [6G Wireless Networks: Vision, Requirements, Architecture, and Key Technologies](https://nerdi.pages.dev/paper/W2964005248) · 2,585 citations
12. [Unmanned Aerial Vehicles (UAVs): A Survey on Civil Applications and Key Research Challenges](https://nerdi.pages.dev/paper/W4213147678) · 2,508 citations · Free PDF
13. [Lithium-ion batteries: outlook on present, future, and hybridized technologies](https://nerdi.pages.dev/paper/W2908542802) · 2,500 citations
14. [A Survey of Indoor Localization Systems and Technologies](https://nerdi.pages.dev/paper/W2964029185) · 2,474 citations
15. [Reactive Oxygen Species (ROS)-Based Nanomedicine](https://nerdi.pages.dev/paper/W2939714203) · 2,452 citations
16. [Deep learning in remote sensing applications: A meta-analysis and review](https://nerdi.pages.dev/paper/W2940726923) · 2,434 citations
17. [The Roadmap to 6G: AI Empowered Wireless Networks](https://nerdi.pages.dev/paper/W2941088479) · 2,236 citations · Free PDF
18. [Issues and opportunities facing aqueous zinc-ion batteries](https://nerdi.pages.dev/paper/W2975964556) · 2,202 citations
19. [Energy Minimization for Wireless Communication With Rotary-Wing UAV](https://nerdi.pages.dev/paper/W2964023906) · 2,200 citations
20. [Rare earth elements: A review of applications, occurrence, exploration, analysis, recycling, and environmental impact](https://nerdi.pages.dev/paper/W2921571282) · 2,193 citations
21. [An Overview on 3D Printing Technology: Technological, Materials, and Applications](https://nerdi.pages.dev/paper/W2967464127) · 2,053 citations
22. [The History of Nanoscience and Nanotechnology: From Chemical–Physical Applications to Nanomedicine](https://nerdi.pages.dev/paper/W2997242469) · 2,023 citations · Free PDF
23. [Long-life and deeply rechargeable aqueous Zn anodes enabled by a multifunctional brightener-inspired interphase](https://nerdi.pages.dev/paper/W2941622960) · 2,021 citations
24. [Imperfections and their passivation in halide perovskite solar cells](https://nerdi.pages.dev/paper/W2949664934) · 1,973 citations
25. [Quantifying the triboelectric series](https://nerdi.pages.dev/paper/W2926989958) · 1,934 citations · Free PDF

Canonical page: https://nerdi.pages.dev/papers/engineering/most-cited-2019