Education

• 2016.09–2021.12, D.Sc. in Mathematics, Northwestern Polytechnical University (NPU), China
• 2012.09–2016.07, B.Sc. in Statistics, Northwestern Polytechnical University (NPU), China

Work Experiences

• 2023.02–Present, Postdoctoral Researcher, Tokyo Institute of Technology, Japan
  • Supervisor: Prof. Hiroya Nakao

Research Experiences

• 2019.11–2020.06, Visiting Scholar, Humboldt University of Berlin, Germany
  • Supervisor: Prof. Juergen Kurths (Member of the Academia Europaea, Editor-in-Chief of Chaos)
• 2018.08–2018.08, Visiting Scholar, Potsdam Institute for Climate Impact Research, Germany
  • Supervisor: Prof. Juergen Kurths
• 2018.04–2018.05, Visiting Scholar, Potsdam Institute for Climate Impact Research, Germany
  • Supervisor: Prof. Juergen Kurths

Research Interests

Applied Mathematics, Nonlinear Dynamics, Stochastic Dynamics, Random Vibration and Control, Bifurcation and Chaos, Approximate Methods, Data-Driven Techniques, Machine Learning

Publications

Reliability of Hypersonic Airfoil with Freeplay and Stochasticity via Nonlinear Energy Sink

Guo W, Xu Y, Liu Q, et al. Reliability of hypersonic airfoil with freeplay and stochasticity via nonlinear energy sink[J]. To appear in AIAA Journal, April 2024.

Noise-induced alternations and data-driven parameter estimation of a stochastic perceptual model

Wang X, Feng J, Liu Q, et al. Noise-induced alternations and data-driven parameter estimation of a stochastic perceptual model[J]. The European Physical Journal Special Topics, 2024: 1-13.

Shimmy dynamics in a dual-wheel nose landing gear with freeplay under stochastic wind disturbances

Du X, Xu Y, Liu Q, et al. Shimmy dynamics in a dual-wheel nose landing gear with freeplay under stochastic wind disturbances[J]. Nonlinear Dynamics, 2024, 112(4): 2477-2499.

Deep learning-based parameter estimation of stochastic differential equations driven by fractional Brownian motions with measurement noise

Feng J, Wang X, Liu Q, et al. Deep learning-based parameter estimation of stochastic differential equations driven by fractional Brownian motions with measurement noise[J]. Communications in Nonlinear Science and Numerical Simulation, 2023, 127: 107589.

Probabilistic description of extreme oscillations and reliability analysis in rolling motion under stochastic excitation

Zhao D, Li Y G, Xu Y, et al. Probabilistic description of extreme oscillations and reliability analysis in rolling motion under stochastic excitation[J]. Science China Technological Sciences, 2023, 66(9): 2586-2596.

The occurrence mechanisms of extreme events in a class of nonlinear Duffing-type systems under random excitations

Zhao D, Li Y, Liu Q, et al. The occurrence mechanisms of extreme events in a class of nonlinear Duffing-type systems under random excitations[J]. Chaos: An Interdisciplinary Journal of Nonlinear Science, 2023, 33(8): 083109.

Dynamic responses of a conceptual two-dimensional airfoil in hypersonic flows with random perturbations

Guo W, Xu Y, Li Y, et al. Dynamic responses of a conceptual two-dimensional airfoil in hypersonic flows with random perturbations[J]. Journal of Fluids and Structures, 2023, 121: 103920.

Complex dynamics of a conceptual airfoil structure with consideration of extreme flight conditions

Liu Q, Xu Y, Li Y. Complex dynamics of a conceptual airfoil structure with consideration of extreme flight conditions[J]. Nonlinear Dynamics, 2023, 111(16): 14991-15010.

Deep learning framework for solving Fokker-Planck equations with low-rank separation representation

Zhang H, Xu Y, Liu Q, et al. Deep learning framework for solving Fokker–Planck equations with low-rank separation representation[J]. Engineering Applications of Artificial Intelligence, 2023, 121: 106036.

Neural network-based parameter estimation of stochastic differential equations driven by Lévy noise

Wang X, Feng J, Liu Q, et al. Neural network-based parameter estimation of stochastic differential equations driven by Lévy noise[J]. Physica A: Statistical Mechanics and its Applications, 2022, 606: 128146.

Complex nonlinear dynamics and vibration suppression of conceptual airfoil models: A state-of-the-art overview

Liu Q, Xu Y, Kurths J, et al. Complex nonlinear dynamics and vibration suppression of conceptual airfoil models: A state-of-the-art overview[J]. Chaos: An Interdisciplinary Journal of Nonlinear Science, 2022, 32(6): 062101.

Solving Fokker-Planck equations using deep KD-tree with a small amount of data

Zhang H, Xu Y, Liu Q, et al. Solving Fokker–Planck equations using deep KD-tree with a small amount of data[J]. Nonlinear Dynamics, 2022, 108(4): 4029-4043.

Early warning of noise-induced catastrophic high-amplitude oscillations in an airfoil model

Ma J, Liu Q, Xu Y, et al. Early warning of noise-induced catastrophic high-amplitude oscillations in an airfoil model[J]. Chaos: An Interdisciplinary Journal of Nonlinear Science, 2022, 32(3): 033119.

Extreme events in a class of nonlinear Duffing-type oscillators with a parametric periodic force

Zhao D, Li Y, Xu Y, et al. Extreme events in a class of nonlinear Duffing-type oscillators with a parametric periodic force[J]. The European Physical Journal Plus, 2022, 137(3): 314.

Rate-dependent tipping and early warning in a thermoacoustic system under extreme operating environment

Zhang X, Xu Y, Liu Q, et al. Rate-dependent tipping and early warning in a thermoacoustic system under extreme operating environment[J]. Chaos: An Interdisciplinary Journal of Nonlinear Science, 2021, 31(11): 113115.

Response statistics of a shape memory alloy oscillator with random excitation

Guo R, Liu Q, Li J, et al. Response statistics of a shape memory alloy oscillator with random excitation[J]. Applied Sciences, 2021, 11(21): 10175.

Fixed-interval smoothing of an aeroelastic airfoil model with cubic or free-play nonlinearity in incompressible flow

Liu Q, Xu Y, Li Y, et al. Fixed-interval smoothing of an aeroelastic airfoil model with cubic or free-play nonlinearity in incompressible flow[J]. Acta Mechanica Sinica, 2021, 37(7): 1168-1182.

Rate-dependent bifurcation dodging in a thermoacoustic system driven by colored noise

Zhang X, Xu Y, Liu Q, et al. Rate-dependent bifurcation dodging in a thermoacoustic system driven by colored noise[J]. Nonlinear Dynamics, 2021, 104: 2733-2743.

Rate-dependent tipping-delay phenomenon in a thermoacoustic system with colored noise

Zhang X Y, Xu Y, Liu Q, et al. Rate-dependent tipping-delay phenomenon in a thermoacoustic system with colored noise[J]. Science China Technological Sciences, 2020, 63(11): 2315-2327.

Bistability and stochastic jumps in an airfoil system with viscoelastic material property and random fluctuations

Liu Q, Xu Y, Kurths J. Bistability and stochastic jumps in an airfoil system with viscoelastic material property and random fluctuations[J]. Communications in Nonlinear Science and Numerical Simulation, 2020, 84: 105184.

Solving Fokker-Planck equation using deep learning

Xu Y, Zhang H, Li Y, et al. Solving Fokker-Planck equation using deep learning[J]. Chaos: An Interdisciplinary Journal of Nonlinear Science, 2020, 30(1): 013133.

The sliding mode control for an airfoil system driven by harmonic and colored Gaussian noise excitations

Liu Q, Xu Y, Xu C, et al. The sliding mode control for an airfoil system driven by harmonic and colored Gaussian noise excitations[J]. Applied Mathematical Modelling, 2018, 64: 249-264.

Active vibration suppression of a novel airfoil model with fractional order viscoelastic constitutive relationship

Liu Q, Xu Y, Kurths J. Active vibration suppression of a novel airfoil model with fractional order viscoelastic constitutive relationship[J]. Journal of Sound and vibration, 2018, 432: 50-64.

Dynamical responses of airfoil models with harmonic excitation under uncertain disturbance

Xu Y, Liu Q, Guo G, et al. Dynamical responses of airfoil models with harmonic excitation under uncertain disturbance[J]. Nonlinear Dynamics, 2017, 89: 1579-1590.

Honors and Awards

• The Outstanding Doctoral Dissertation Award of NPU (Top 3%), April 2024;
• The First Prize of the Science and Technology Award of Shaanxi Society for Vibration Engineering (as the fourth winner), Shaanxi Society for Vibration Engineering, China, 2023;
• The Sino-German (CSC-DAAD) Postdoc Scholarship (only 50 people were selected), 2021;
• The 2022 High Impact Paper Award of the Science China Technological Sciences (as the third author, only 16 papers were selected out of about 230 articles), Science China Press, 2023;
• The First Prize of the Sixth Postgraduate Innovation Achievement Award (as the first winner), Education Department of Shaanxi Provincial Government, 2022;
• The First Prize of the 1st Postgraduate Forum of School of Mathematics and Statistics, NPU, 2022;
• The First Prize of the Third Postgraduate Innovation Achievement Award (as the sixth winner, only 1 item in Science in NPU, Top 1%), Education Department of Shaanxi Provincial Government, 2017;
• The First-Class Academic Scholarship of NPU (Doctor) (2 times, Top 10%), 2017, 2018;
• The Outstanding Postgraduate of NPU (Doctor) (2 times, Top 10%), 2017, 2018;
• The Second-Class Special Scholarship of Beijing Jingdiao, Beijing Jingdiao Group, 2016;
• The Excellent Undergraduate Thesis of NPU (Top 5%), 2016;
• The Second Prize of the Preliminary Round of the Fifth National University Mathematics Competition (Mathematics Category) (Top 1%), Chinese Mathematical Society, 2014;
• The National Encouragement Scholarship for Undergraduate Students, China (Top 3%), 2013;
• The Outstanding Student of NPU (Bachelor) (2 times, Top 5%), 2013, 2014;
• The Second Prize of the Mathematical Modeling Competition of NPU (2 times, Top 5%), 2013, 2014;
• The Third Prize of the Pure Mathematics Competition of NPU, 2013.

Talks

Complex dynamics and vibration suppression of conceptual airfoil models with random loadings

April 12, 2024

Invited Speaker at The 3rd Edition of Mechanical and Aerospace Engineering Virtual 2024 (V-MAE2024), April 12, 2024, Online Conference

Scientific Session on the topic of “Recent advances in stochastic nonlinear dynamics: modeling, data analysis”

August 20, 2023

Chairman at The 10th International Congress on Industrial and Applied Mathematics (ICIAM 2023), Aug 20-25, 2023, Tokyo, Japan

Nonlinear dynamics and vibration suppression of conceptual airfoil models with random loads

June 05, 2023

Plenary Speech at IUTAM Symposium on Data-driven Nonlinear and Stochastic Dynamics with the Control, June 5-9, 2023, Xi’an, Shaanxi, China

Nonlinear dynamics and control of an airfoil model with random fluctuations

July 24, 2021

Invited Talk at The 8th International Conference on Vibration Engineering (ICVE 2021), July 24-26, 2021, Shanghai, China

Service

Journal Reviewer

• International Journal of Mechanical Sciences
• Aerospace Science and Technology
• Chaos Solitons and Fractals
• ISA Transactions
• Nonlinear Dynamics
• Chaos
• Physics of Fluids
• Signal Processing
• Theoretical and Applied Mechanics Letters
• European Physical Journal Special Topics
• Physica Scripta
• International Journal of Aerospace Engineering
• Mathematics
• Machines

Professional Skills

Programming Language: Matlab, Python, LATEX, C/C++, Fortran, Maple

Package or Framework: NumPy, Matplotlib, SciPy, Seaborn, Tensorflow