Search Results for author: Jiajun Ma

Found 5 papers, 1 papers with code

The Surprising Effectiveness of Skip-Tuning in Diffusion Sampling

no code implementations23 Feb 2024 Jiajun Ma, Shuchen Xue, Tianyang Hu, Wenjia Wang, Zhaoqiang Liu, Zhenguo Li, Zhi-Ming Ma, Kenji Kawaguchi

Surprisingly, the improvement persists when we increase the number of sampling steps and can even surpass the best result from EDM-2 (1. 58) with only 39 NFEs (1. 57).

Image Generation

Fast Kernel k-means Clustering Using Incomplete Cholesky Factorization

no code implementations7 Feb 2020 Li Chen, Shuisheng Zhou, Jiajun Ma

The key idea of the proposed kernel $k$-means clustering using incomplete Cholesky factorization is that we approximate the entire kernel matrix by the product of a low-rank matrix and its transposition.

Clustering

Stable Sparse Subspace Embedding for Dimensionality Reduction

no code implementations7 Feb 2020 Li Chen, Shuizheng Zhou, Jiajun Ma

Although they adopt uniform sampling with replacement, due to large sampling variance, the number of non-zeros is uneven among rows of the projection matrix which is generated in one trial, and more data information may be lost after dimension reduction.

Dimensionality Reduction

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