5 papers
Markovian Shock-Source Tracing and Multidimensional Asset Roles in Exchange Rates, Gold Futures, and Bitcoin
Seung Ho Choi, Seoin Jang, Hyunwoo Lee +1
This study examines cross-asset connectedness in an international financial network of major exchange rates, gold futures, and Bitcoin. Moving beyond the conventional net transmitt…
Continuous-Time Analysis for Minimax and Bilevel Problems
Hyunwoo Lee, Jeongyeol Kwon, Dohyun Kwon
We study single-loop gradient-flow dynamics for nested optimization, where the outer variable evolves while auxiliary variables track the inner solution map. While existing analyse…
Beyond Gaussian Initializations: Signal Preserving Weight Initialization for Odd-Sigmoid Activations
Hyunwoo Lee, Hayoung Choi, Hyunju Kim
Activation functions critically influence trainability and expressivity, and recent work has therefore explored a broad range of nonlinearities. However, widely used Gaussian i.i.d…
Robust Weight Initialization for Tanh Neural Networks with Fixed Point Analysis
Hyunwoo Lee, Hayoung Choi, Hyunju Kim
As a neural network's depth increases, it can improve generalization performance. However, training deep networks is challenging due to gradient and signal propagation issues. To a…
Improved weight initialization for deep and narrow feedforward neural network
Hyunwoo Lee, Yunho Kim, Seung Yeop Yang +1
Appropriate weight initialization settings, along with the ReLU activation function, have become cornerstones of modern deep learning, enabling the training and deployment of highl…