Update README.md

README.md

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 ## 2024
+- **[arXiv]** Let It Flow: Simultaneous Optimization of 3D Flow and Object Clustering [[2404.083636]](https://arxiv.org/abs/2404.08363)
 - **[CVPR 24]** DifFlow3D: Toward Robust Uncertainty-Aware Scene Flow Estimation with Iterative Diffusion-Based Refinement [[2311.17456]](https://arxiv.org/abs/2311.17456)[[code]](https://github.com/IRMVLab/DifFlow3D)![GitHub stars](https://img.shields.io/github/stars/IRMVLab/DifFlow3D.svg?logo=github&label=Stars)
 - **[arXiv]** DiffSF: Diffusion Models for Scene Flow Estimation [[2403.05327]](https://arxiv.org/abs/2403.05327)
 - **[arXiv]** I Can't Believe It's Not Scene Flow! [[2403.04739]](https://arxiv.org/abs/2403.04739)