Uncertainty Quantification: Latest Advances and Applications

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "Engineering Mathematics".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 2045

Special Issue Editors


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Guest Editor
Department of Mechanics and Engineering Science, Peking University, Beijing 100091, China
Interests: computational mechanics; uncertainty quantification; reliability analysis; machine learning; optimization
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Guest Editor
School of Mechanical Engineering & Automation, Beihang University, Beijing 100191, China
Interests: structural analysis; isogeometric analysis; computer-aided geometric design; computer-aided manufacturing

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Guest Editor
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300350, China
Interests: hydraulic materials and structures; experiment and simulation; isogeometric analysis; machine learning

Special Issue Information

Dear Colleagues,

Uncertainty is ubiquitous in science and engineering, which may arise from an imperfect state of knowledge or from the inherent randomness of natural phenomena such as material properties, loading conditions, and measurements. Uncertainty quantification is the process of quantitatively characterizing significant uncertainties in a complex system and of assessing their effect on computed or experimental results. Uncertainty quantification plays a vital role in reducing the risks associated with uncertainties and enhancing the fidelity of prediction in engineering design and decision making. As this is the study of mathematical models and numerical methods advances, several algorithms of uncertainty quantification are put forward, including analytic reliability methods, Monte Carlo simulation (MCs), perturbation methods, polynomial chaos expansions, the Gaussian process, etc. Despite its theoretical and practical importance, a number of open questions still exist due to the complexity of modeling, simulation, and experiments in uncertainty quantification. Hence, advances should be made to deepen our understanding in this research field.

The aim of this Special Issue is to bring together original research articles and review articles highlighting recent advances in theoretical modeling, numerical simulation, and experiments in uncertainty quantification. We also encourage submissions that investigate interesting applications involving uncertainty quantification. Research integrating machine learning or data-driven techniques is particularly welcome.

Potential topics include but are not limited to the following:

  • Data-driven and machine learning techniques in uncertainty quantification.
  • Novel theory of modeling uncertainty problems.
  • Numerical algorithms for alleviating computational burden and/or enhancing accuracy in uncertainty quantification.
  • Sensitivity analysis and optimization based on uncertainty quantification.
  • Novel experimental techniques related to uncertainty quantification.
  • Case studies or advanced applications of uncertainty quantification in engineering and social science.

Dr. Chensen Ding
Dr. Xiaoxiao Du
Dr. Mengxi Zhang
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Mathematics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • uncertainty quantification
  • data-driven and machine learning
  • sensitivity analysis and optimization
  • uncertainty quantization experiment
  • stochastic systems
  • modeling and simulation
  • numerical methods

Published Papers (2 papers)

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Research

20 pages, 8697 KiB  
Article
Improved Bayesian Model Updating Method for Frequency Response Function with Metrics Utilizing NHBFT-PCA
by Jinhui Li, Zhenhong Deng, Yong Tang, Siqi Wang, Zhe Yang, Huageng Luo, Wujun Feng and Baoqiang Zhang
Mathematics 2024, 12(13), 2076; https://doi.org/10.3390/math12132076 - 2 Jul 2024
Viewed by 408
Abstract
To establish a high-fidelity model of engineering structures, this paper introduces an improved Bayesian model updating method for stochastic dynamic models based on frequency response functions (FRFs). A novel validation metric is proposed first within the Bayesian theory by using the normalized half-power [...] Read more.
To establish a high-fidelity model of engineering structures, this paper introduces an improved Bayesian model updating method for stochastic dynamic models based on frequency response functions (FRFs). A novel validation metric is proposed first within the Bayesian theory by using the normalized half-power bandwidth frequency transformation (NHBFT) and the principal component analysis (PCA) method to process the analytical and experimental frequency response functions. Subsequently, traditional Bayesian and approximate Bayesian computation (ABC) are improved by integrating NHBFT-PCA metrics for different application scenarios. The efficacy of the improved Bayesian model updating method is demonstrated through a numerical case involving a three-degrees-of-freedom system and the experimental case of a bolted joint lap plate structure. Comparative analysis shows that the improved method outperforms conventional methods. The efforts of this study provide an effective and efficient updating method for dynamic model updating based on the FRFs, addressing some of the existing challenges associated with FRF-based model updating. Full article
(This article belongs to the Special Issue Uncertainty Quantification: Latest Advances and Applications)
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11 pages, 330 KiB  
Article
A Probability Proportional to Size Estimation of a Rare Sensitive Attribute Using a Partial Randomized Response Model with Poisson Distribution
by Gi-Sung Lee, Ki-Hak Hong and Chang-Kyoon Son
Mathematics 2024, 12(2), 196; https://doi.org/10.3390/math12020196 - 7 Jan 2024
Viewed by 785
Abstract
In this paper, we suggest using a partial randomized response model using Poisson distribution to efficiently estimate a rare sensitive attribute by applying the probability proportional to size (PPS) sampling method when the population is composed of several different and sensitive clusters. We [...] Read more.
In this paper, we suggest using a partial randomized response model using Poisson distribution to efficiently estimate a rare sensitive attribute by applying the probability proportional to size (PPS) sampling method when the population is composed of several different and sensitive clusters. We have obtained estimators for a rare and sensitive attribute and their variances and variance estimates by applying PPS sampling and two-stage equal probability sampling. We compare the efficiency between the estimators of the rare sensitive attribute, one obtained via PPS sampling with replacement and the other obtained using the two-stage equal probability sampling with replacement. As a result, it is confirmed that the estimate obtained via the PPS sampling with replacement is more efficient than the estimate provided by the two-stage equal probability sampling with replacement when the cluster sizes are different. Full article
(This article belongs to the Special Issue Uncertainty Quantification: Latest Advances and Applications)
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