37 citations · 168 across the 20 of their papers we have counts for
10 papers · 1 filter
A Statistical Physics View of the S&P 500: Pairwise Interactions and Time-Varying Dynamics
Sebin Oh, Marta C. Gonzáleza, Ziqi Wang
We analyze a fixed panel of S\&P 500 stocks from 1996 to 2026 using complementary static and kinetic Ising models applied to daily binary open-to-close movements. The static pairwi…
Phase Transitions in Collective Damage of Civil Structures under Natural Hazards
Sebin Oh, Jinyan Zhao, Raul Rincon +2
The fate of cities under natural hazards depends not only on hazard intensity but also on the coupling of structural damage, a collective process that remains poorly understood. He…
A composition of simplified physics-based model with neural operator for trajectory-level seismic response predictions of structural systems
Jungho Kim, Sang-ri Yi, Ziqi Wang
Accurate prediction of nonlinear structural responses is essential for earthquake risk assessment and management. While high-fidelity nonlinear time history analysis provides the m…
Long-range Ising model for regional-scale seismic risk analysis
Sebin Oh, Sang-ri Yi, Ziqi Wang
This study introduces the long-range Ising model from statistical mechanics to the Performance-Based Earthquake Engineering (PBEE) framework for regional seismic damage analysis. T…
Risk Twin: Real-time Risk Visualization and Control for Structural Systems
Zeyu Wang, Ziqi Wang
Digital twinning in structural engineering is a rapidly evolving technology that aims to eliminate the gap between physical systems and their digital models through real-time sensi…
Dimensionality reduction can be used as a surrogate model for high-dimensional forward uncertainty quantification
Jungho Kim, Sang-ri Yi, Ziqi Wang
We introduce a method to construct a stochastic surrogate model from the results of dimensionality reduction in forward uncertainty quantification. The hypothesis is that the high-…
Maximum entropy-based modeling of community-level hazard responses for civil infrastructures
Xiaolei Chu, Ziqi Wang
Perturbed by natural hazards, community-level infrastructure networks operate like many-body systems, with behaviors emerging from coupling individual component dynamics with group…
Efficient seismic reliability and fragility analysis of lifeline networks using subset simulation
Dongkyu Lee, Ziqi Wang, Junho Song
Various simulation-based and analytical methods have been developed to evaluate the seismic fragilities of individual structures. However, the seismic safety and resilience of a co…
Adaptive active subspace-based metamodeling for high-dimensional reliability analysis
Jungho Kim, Ziqi Wang, Junho Song
To address the challenges of reliability analysis in high-dimensional probability spaces, this paper proposes a new metamodeling method that couples active subspace, heteroscedasti…
Relaxation-based importance sampling for structural reliability analysis
Jianhua Xian, Ziqi Wang
This study presents an importance sampling formulation based on adaptively relaxing parameters from the indicator function and/or the probability density function. The formulation…