Geophysical Center

In Situ Stress Prediction Using Multiple Seismic Attributes Based on the Random Forest Algorithm

ABSTRACT In situ stress characterisation is crucial for the exploration and development of coal resources. Conventional methods based on well‐log data offer high‐accuracy point measurements but are limited to wellbore locations, whereas traditional seismic‐based predictions provi...

Imagine to Ensure Safety in Hierarchical Reinforcement Learning

This work investigates the safe exploration problem in reinforcement learning, where an agent must maximize cumulative performance while simultaneously satisfying safety constraints. This challenge becomes particularly difficult in long-horizon tasks because safe reinforcement le...

Near-total loss of buttressing stresses observed on Pine Island Ice Shelf, West Antarctica

Ice shelves, the floating extensions of the Antarctic Ice Sheet, provide critical buttressing stresses that resist the seaward flow of ice and help set the position of the grounding line, where the ice goes afloat. As buttressing stresses are diminished by thinning or fracturing...