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cs.LG2026
Where Entropy Is Measured Matters: Policy Geometry in Bounded Continuous-Control PPO
Yiyang He, Zhichun Zhou, Ziwei Wang +2
Many continuous-control policies are optimized as unbounded Gaussians and then mapped into bounded actions. We show that where entropy is measured changes the policy geometry learn…
physics.optics2026
Time-Reversal Characteristic Modes of Lossy Reciprocal Structures
Chenbo Shi, Jin Pan, Xin Gu +2
A time-reversal characteristic-mode decomposition is developed for reciprocal lossy electromagnetic structures. The formulation is built on a transmit--receive interpretation of re…