Inversion of 137Cs emissions following the fukushima accident with adaptive release recovery for temporal absences of observations

S Fang, X Dong, S Zhuang, Z Tian, Y Zhao, Y Liu… - Environmental …, 2023 - Elsevier
Temporal absences in observation records lead to release losses during the source term
inversions of atmospheric radionuclide emissions. Consequently, objectively-estimated …

Objective inversion of the continuous atmospheric 137Cs release following the Fukushima accident

X Dong, S Fang, S Zhuang, Y Xu, Y Zhao… - Journal of Hazardous …, 2023 - Elsevier
Eleven years after the Fukushima accident, independent objective estimates of the
atmospheric 137 Cs release still suffer from discontinuities such as negative release terms …

Oscillation-free source term inversion of atmospheric radionuclide releases with joint model bias corrections and non-smooth competing priors

S Fang, X Dong, S Zhuang, Z Tian, T Chai, Y Xu… - Journal of Hazardous …, 2022 - Elsevier
The source term of atmospheric radionuclide releases is essential for the hazardous
consequence assessment and emergency response. However, the artificial release …

[HTML][HTML] Atmospheric dispersion of chemical, biological, and radiological hazardous pollutants: Informing risk assessment for public safety

X Zhang, J Wang - Journal of Safety Science and Resilience, 2022 - Elsevier
Modern society is confronted with emerging threats from chemical, biological, and
radiological (CBR) hazardous substances, which are intensively utilized in the chemical …

Adaptive center constraint for joint release rate estimation and model correction: Multi-scenario validation against wind tunnel experiments

X Li, J Song, Y Zhang, L Yang, S Fang - Progress in Nuclear Energy, 2024 - Elsevier
Release rate estimation is crucial for the consequence assessment and emergency decision-
making in nuclear accidents. However, inevitable model biases can lead to significant …

Comparative study on gradient-free optimization methods for inverse source-term estimation of radioactive dispersion from nuclear accidents

S Jang, J Park, HH Lee, CS Jin, ES Kim - Journal of hazardous materials, 2024 - Elsevier
In this study, we rigorously assess the performance of three gradient-free optimization
algorithms—Ensemble Kalman Inversion (EKI), Particle Swarm Optimization (PSO), and …

Multi-scenario validation of the robust inversion method with biased plume range and values

X Dong, S Zhuang, Y Xu, H Hu, X Li, S Fang - Journal of Environmental …, 2024 - Elsevier
Release rate estimation is a vital means of revealing the emission process of radionuclides
and assessing the environmental consequences in an emergency. Inverse modeling is …

Robust source reconstruction of atmospheric radionuclides from observations of different sparsity with spatial preselection and non-smooth constraints

Y Xu, X Dong, H Luo, S Fang - Journal of Hazardous Materials, 2025 - Elsevier
As the global-nuclear-capacity-tripling plan is implemented, reconstruction of the source
locations and release rates of atmospheric radionuclides becomes increasingly important for …

Ensemble-Based Inverse Modeling for Multi-Radionuclide Source Term Estimation from Time-Series Gamma Dose Rates During Radiological Emergencies

S Jang, J Park, S Kim, KD Im, HH Lee… - Available at SSRN … - papers.ssrn.com
This research presents an innovative ensemble-based method for estimating multi-
radionuclide source terms during nuclear accidents using gamma dose rates. By integrating …

BSc./Mgr. Téma: Inverzní modelování zdroje při radiačním úniku do atmosféry (Tichý)

ÚTI a Automatizace - utia.cas.cz
Při detekci radioaktivity v ovzduší je zásadním úkolem určení lokace úniku a jeho časového
průběhu. Zatímco lokace bývá velmi často známa, časový průběh a celkové množství uniklé …