Viska(Sijia) Wei韦思嘉

Viska(Sijia) Wei韦思嘉

PhD @ JHU

Hi

I am a PhD at Johns Hopkins University, co-advised by Prof. Alex Szalay and Prof. Fei Lu. I did my undergrad at UC Berkeley majored in physics; master at Uchicago.

Projects

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Interactive Demo

Learning from Unlabeled Particle Data

Trajectory-free energy balance method for learning confinement and interaction potentials from interacting particle systems without particle labels. Neural networks + self-test loss achieve <5% gradient error across 4 physical models.

SDE Neural Networks Inverse Problems Tikhonov
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AI Telescope

Physics Informed Machine Learning

Building physics-informed autoencoders for spectral analysis and designing AI telescope algorithms with reinforcement learning for optimal target selection in the PFS survey.

Autoencoders Spectroscopy RL
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Big Data Embedding

Sketch & Streaming Algorithms

Geo-distributed tSNE and UMAP at scale. A preprocessing pipeline enabling linear scaling while preserving embedding quality, verified on healthcare and astrophysics datasets.

Sketching tSNE/UMAP Distributed