这项研究由上海交通大学、上海财经大学和斯坦福大学联合完成，论文发表于2026年5月，预印本编号为arXiv:2605.28158v1，感兴趣的读者可通过该编号在arXiv平台查阅完整论文。

It’s pretty easy to take a balloon, fill it up with helium, and send it up in to the upper atmosphere. It’s much harder to keep track of it and recover it when it falls back to Earth. If you’re trying ...