LANE: Lexical Adversarial Negative Examples for Word Sense Disambiguation

The article presents PCA++, an advanced method in contrastive learning designed to enhance the recovery of shared signal subspaces from high-dimensional data affected by background noise. Building on the limitations of PCA+, which struggles under strong noise, PCA++ employs a hard uniformity constraint to enforce identity covariance on projected features. This approach ensures stability in high-dimensional settings and offers a closed-form solution through a generalized eigenproblem, demonstrating its effectiveness in mitigating background interference.

Bark beetle infestations pose a significant threat to the health of coniferous forests. A recent study introduces a few-shot learning method that utilizes contrastive learning to detect these infestations through satellite hyperspectral data from PRISMA. The approach involves pre-training a CNN encoder to extract features from hyperspectral data, which are then used to estimate the proportions of healthy, infested, and dead trees. Results from the Dolomites indicate that this method surpasses traditional PRISMA spectral bands and Sentinel-2 data in effectiveness.

OpenUS is a newly proposed open-source foundation model for ultrasound image analysis, addressing the challenges of operator-dependent interpretation and variability in ultrasound imaging. This model utilizes a vision Mamba backbone and introduces a self-adaptive masking framework that enhances pre-training through contrastive learning and masked image modeling. With a dataset comprising 308,000 images from 42 datasets, OpenUS aims to improve the generalizability and efficiency of ultrasound AI models.