Update README.md

README.md

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 ## Abstract
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 Swarm UAV autonomous flight for Long-Horizon (LH) tasks is crucial for advancing the low-altitude economy. 
 However, existing methods focus only on specific basic tasks due to dataset limitations, failing in real-world deployment for LH tasks. 
 LH tasks are not mere concatenations of basic tasks, requiring handling long-term dependencies, maintaining persistent states, and adapting to dynamic goal shifts. 
@@ -26,17 +25,14 @@ U2UData-2 also introduces an LH task for **wildlife conservation** and provides
 U2UData-2 can be found at https://fengtt42.github.io/U2UData-2/.
 
 ## Dataset Size
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 Since the entire dataset is **3.6T** in total, we only upload the dataset for one scenario, which is **252G** in total. 
 
 ## Helper
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 If you need the full dataset, you can send an email to obtain the Baidu Cloud link for downloading.
 PPM is a binary image format. If you need PNG format, we provide conversion code, which you can download and convert by yourself.
 I have full parameter information for each trajectory. If you need other parameter information, such as IMU, detailed drone parameters, etc., you can contact me by email at any time.
 
 ## Cite
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 @inproceedings{feng2025u2udata2scalableswarmuavs,
       title={U2UData-2: A Scalable Swarm UAVs Autonomous Flight Dataset for Long-horizon Tasks}, 
       author={Tongtong Feng and Xin Wang and Feilin Han and Leping Zhang and Wenwu Zhu},
@@ -45,5 +41,4 @@ I have full parameter information for each trajectory. If you need other paramet
 }
 
 ## Web Link
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 https://fengtt42.github.io/U2UData-2/