arXiv Machine Learning
Oct 3

Variational Streaming Flow: Probabilistic Forecasting in Physical Time

Variational Streaming Flow (VSF) extends the efficient Streaming Flow (SF) framework by learning a latent distribution conditioned on system dynamics, enabling probabilistic forecasting in physical time. Unlike SF’s deterministic velocity field, VSF produces multiple plausible future trajectories, improving predictive accuracy and distributional fidelity across deterministic and stochastic dynamical systems. The method supports long‑horizon rollouts over 1,000 steps, handles bifurcating dynamics, and can be integrated as a plug‑and‑play predictor into Joint‑Embedding Predictive Architecture (JEPA) world models to enhance navigation, motion planning, and manipulation tasks.

By Hans Hao-Hsun Hsu, Minseon Gwak, Soon Hoe Lim, Pan Li, N. Benjamin Erichson
arXiv Computer Vision
6d ago

UFMF: Radar-Guided Kinematic Priors for Real-Time 4D Occupancy Forecasting

UFMF (Ultra-Fast Multi-modal Forecaster) is a real‑time 4D occupancy forecasting model that uses a lightweight diagonal state‑space core and a radar‑guided velocity‑aware dynamic prior to predict future motion. The prior splits future displacement into a linear extrapolation and a learned residual, enabling per‑cell flow fields that carry a compact dynamic latent subspace during rollout. With auxiliary world‑frame dynamic supervision and class‑conditioned vertical‑profile supervision, UFMF achieves 122 FPS on an RTX 4090 and outperforms recent occupancy world models on nuScenes while using far less computational resources.

By Zeping Zhang, Zhuoya Zhao, Robert Lagani\`ere
Hugging Face Trending Papers
Jul 8

BubbleSH: A Dataset of Rising Bubbles with Deformable Interfaces

Bubbly flows exhibit complex multiscale dynamics, with deformable bubbles interacting through the surrounding liquid and giving rise to strongly coupled kinematic and morphological behavior. We present BubbleSH, a bubbly flows dataset consisting of transient, three-dimensional bubble-swarm dynamics obtained from high-fidelity direct numerical simulations of bubbles rising in a periodic domain.

arXiv AI
Oct 31

WorldFlow: Joint Video and 3D Motion Prediction via Large-Scale Pretraining

WorldFlow is a generative world model that jointly predicts future video frames and query-based 3D trajectories using a unified Mixture-of-Transformers backbone. It represents 3D motion as continuous displacement tokens aligned with the video grid and optimizes a rectified-flow objective to couple explicit geometric dynamics with visual evolution. Trained on 1.44 million heterogeneous samples and evaluated on WorldFlowBench, it achieves the lowest average and final displacement errors among learning-based methods, notably outperforming baselines on spatial reasoning tasks.

By Yuhao Lu, Jiongxu Chen, Hexiang Wei, Jiajin Wu, Juelin Li, Mingjian Liang, Fan Yang, Zhuowei Liang, Zihao Liu, Zhennan Wang, Sheng Wang, Lin Shao