| Biodiesel Production and Applications | Lifetime | 13 | US 2 | 99.81 |
| Advanced Combustion Engine Technologies | Lifetime | 49 | US 21 | 99.64 |
| Cognitive Radio Networks and Spectrum Sensing | Lifetime | 38 | US 10 | 98.97 |
| Vehicle emissions and performance | Lifetime | 365 | US 114 | 98.15 |
| Catalysis and Hydrodesulfurization Studies | Lifetime | 592 | US 91 | 97.23 |
| Lubricants and Their Additives | Lifetime | 241 | US 47 | 96.93 |
| Thermochemical Biomass Conversion Processes | Lifetime | 502 | US 59 | 97.39 |
| Wireless Communication Networks Research | Lifetime | 625 | US 194 | 97.12 |
| Oil Spill Detection and Mitigation | Lifetime | 127 | US 63 | 95.38 |
| Advanced MIMO Systems Optimization | Lifetime | 831 | US 168 | 97.04 |
| Catalysis for Biomass Conversion | Lifetime | 630 | US 91 | 96.02 |
| Heat transfer and supercritical fluids | Lifetime | 361 | US 81 | 94.87 |
| Maritime Transport Emissions and Efficiency | Lifetime | 268 | US 20 | 93.99 |
| COVID-19 impact on air quality | Lifetime | 124 | US 16 | 90.42 |
| Hybrid Renewable Energy Systems | Lifetime | 806 | US 72 | 94.19 |
| Distributed Sensor Networks and Detection Algorithms | Lifetime | 733 | US 240 | 87.57 |
| Biodiesel Production and Applications | 2021-2025 | 2 | US 1 | 99.88 |
| Advanced Combustion Engine Technologies | 2021-2025 | 14 | US 1 | 99.56 |
| Thermochemical Biomass Conversion Processes | 2021-2025 | 49 | US 5 | 98.72 |
| Catalysis and Hydrodesulfurization Studies | 2021-2025 | 64 | US 4 | 98.10 |
| Catalytic Processes in Materials Science | 2021-2025 | 303 | US 20 | 98.19 |
| Vehicle emissions and performance | 2021-2025 | 95 | US 6 | 97.26 |
| Biofuel production and bioconversion | 2021-2025 | 178 | US 14 | 96.80 |
| Catalysis for Biomass Conversion | 2021-2025 | 213 | US 13 | 94.83 |
| Solar Thermal and Photovoltaic Systems | 2021-2025 | 376 | US 11 | 94.77 |
| Hybrid Renewable Energy Systems | 2021-2025 | 388 | US 19 | 93.33 |
| COVID-19 impact on air quality | 2021-2025 | 87 | US 7 | 88.54 |
| Maritime Transport Emissions and Efficiency | 2021-2025 | 204 | US 4 | 89.66 |
| Energy and Environment Impacts | 2021-2025 | 783 | US 62 | 88.16 |
| Algal biology and biofuel production | 2021-2025 | 718 | US 33 | 87.38 |
| Lubricants and Their Additives | 2021-2025 | 438 | US 18 | 85.63 |
| Phosphorus and nutrient management | 2021-2025 | 571 | US 38 | 81.45 |
| Research studies in Vietnam | 2021-2025 | 776 | US 41 | 78.10 |
| Oil Spill Detection and Mitigation | 2021-2025 | 130 | US 22 | 78.98 |
| Heat transfer and supercritical fluids | 2021-2025 | 988 | US 73 | 63.01 |
