update readme

Author: wokaikaixinxin

README.md

@@ -10,6 +10,8 @@
 
 [Paper PDF](./Real_Time_Oriented_Object_Detection_Transformer_in_Remote_Sensing_Images.pdf)
 
+[Arxiv](https://arxiv.org/abs/2603.15497)
+
 Bilibili Train Tutorial: [![Bilibili](https://img.shields.io/badge/Train_Tutorial-fb7299?style=flat-square&logo=bilibili&logoColor=white)](https://www.bilibili.com/video/BV1QQw4zJEot/)
 Bilibili Test Tutorial: [![Bilibili](https://img.shields.io/badge/Test_Tutorial-fb7299?style=flat-square&logo=bilibili&logoColor=white)](https://www.bilibili.com/video/BV1Vew8zbEVa/)
 Bilibili Deploy Tutorial: [![Bilibili](https://img.shields.io/badge/Deploy_Tutorial-fb7299?style=flat-square&logo=bilibili&logoColor=white)](https://www.bilibili.com/video/BV1VmwLzWExY/)