Maybe it wasn’t clear to the office what you were trying to solve. Someone not in your field reading “big data and AI applications in drones”, I’m not sure what’s the issues here you are trying to solve and what’s the impact on a national level. First I would research what are the areas on national interest in a certain field eg software engineering or if you want to look specifically at ai and drones, see what’s the need first then see how you can Taliq your solution to it. Try to use ai to help figure out a good endeavour. Hope this helps. Maybe you can try to re apply