Dr Xu Xu

School of Computer Science

Senior Lecturer in Complex Systems Modelling

Xu.Xu@sheffield.ac.uk
+44 114 215 7549

Regent Court (DCS)

Full contact details

Dr Xu Xu
School of Computer Science
Regent Court (DCS)
211 Portobello
Sheffield
S1 4DP

Profile

Dr Xu Xu is a Senior Lecturer in Complex Systems Modelling in the Department of Computer Science and the INSIGNEO Institute for in silico Medicine, at the University of Sheffield, UK. Her current research focuses on haemodynamics and multi-scale modelling for personalised cardiovascular healthcare.

Xu obtained a BEng degree in Automation from Xidian University, China, and then an MSc in Control Systems Engineering (with Distinction) and a PhD in Nonlinear Systems and Cellular Maps, both in the University of Sheffield (UoS). She worked as a Postdoctoral Researcher at UoS and the University of Southampton, on mathematical and computational modelling of complex systems and processes, followed by the positions of Lecturer, Senior Lecturer, Reader and Interim Deputy Head of Department for the Department of Engineering and Maths at Sheffield Hallam University (SHU), before returning to UoS as a Senior Lecturer in Oct 2023.

She has extensive academic leadership experience and served as the Interim Deputy Head of a large department, a SHU Early Career Researcher Representative, an MSc Course Leader and a Postgraduate Research Tutor for engineering MPhil/PhD programs, achieving outstanding PRES overall student satisfactions which were ranked 1st in the engineering sector, in both 2020-2021 and 2021-2022.

She has supervised 6 PhD students to completion and has won 8 Sheffield Hallam University or College awards for inspirational teaching, inspirational research supervising and outstanding academic advising.

Research interests: • Multi-scale and multi-component lattice Boltzmann simulations of blood flow
• Compartmental cardiovascular model for personalised healthcare
• Uncertainty quantification and parameter identification
• Nonlinear dynamics, control and state estimation
• Cellular automata and swarm robotics

Publications

Journal articles

Saxton H, Xu X, Schenkel T & Halliday I (2024) Assessing input parameter hyperspace and parameter identifiability in a cardiovascular system model via sensitivity analysis. Journal of Computational Science, 79, 102287-102287.
Tristano M, Lenzo B, Xu X, Forrier B, D'hondt T, Risaliti E & Wilhelm E (2024) Hardware-in-the-Loop Real-Time Implementation of a Vehicle Stability Control Through Individual Wheel Torques. IEEE Transactions on Vehicular Technology, 73(4), 4683-4693.
Saxton H, Schenkel T, Halliday I & Xu X (2023) Personalised parameter estimation of the cardiovascular system: Leveraging data assimilation and sensitivity analysis. Journal of Computational Science, 74, 102158-102158.
Spendlove J, Xu X, Schenkel T, null JPG & Halliday I (2023) Chromodynamic Lattice Boltzmann Method for the Simulation of Drops, Erythrocytes, and other Vesicles. Communications in Computational Physics, 33(1), 283-309.
Kokkrathoke S, Rawsthorne A, Zhang H & Xu NA (2021) Nonlinear optimal stabilising control of a two-wheel robot. International Journal of Modelling, Identification and Control, 38(2), 175-175.
Spendlove J, Xu X, Schenkel T, Seaton MA, Halliday I & Gunn JP (2021) Three-dimensional single framework multicomponent lattice Boltzmann equation method for vesicle hydrodynamics. Physics of Fluids, 33(7).
Spendlove J, Xu X, Schenkel T, Seaton M & Halliday I (2020) Chromo-dynamic multi-component lattice Boltzmann equation scheme for axial symmetry. Journal of Physics A: Mathematical and Theoretical, 53(14), 145001-145001.
Talamali MS, Bose T, Haire M, Xu X, Marshall JAR & Reina A (2020) Sophisticated collective foraging with minimalist agents: a swarm robotics test.. Swarm Intelligence, 14, 25-56.
Xu X (2019) Real Linear Automata with a Continuum of Periodic Solutions for Every Period. International Journal of Bifurcation and Chaos, 29(06), 1930016-1930016.
Vertyagina Y, Mahfouf M & Xu X (2013) 3D modelling of ferrite and austenite grain coarsening using real-valued cellular automata based on transition function. Journal of Materials Science, 48(16), 5517-5527.
Xu X, Banks SP & Mahfouf M (2011) ON THE STRUCTURE OF REAL-VALUED ONE-DIMENSIONAL CELLULAR AUTOMATA. INT J BIFURCAT CHAOS, 21(5), 1265-1279.
Xu X, Song Y & Banks SP (2009) ON THE DYNAMICAL BEHAVIOR OF CELLULAR AUTOMATA. INT J BIFURCAT CHAOS, 19(4), 1147-1156.
Du CY, Xu X, Banks SP & Wu AG (2009) Control of nonlinear functional differential equations. NONLINEAR ANAL-THEOR, 71(12), E1850-E1857.
Javed T, Oluwole-ojo O, Howarth M, Xu X, Rashvand M & Zhang H () Application of Advanced Process Control to a Continuous Flow Ohmic Heater: A Case Study with Tomato Basil Sauce. Applied Sciences, 14(19), 8740-8740.
Oluwole-ojo O, Javed T, Howarth M, Xu X, O’Brien A & Zhang H () Model Validation and Real-Time Process Control of a Continuous Flow Ohmic Heater. Modelling, 5(3), 752-775.
Saxton H, Xu X, Schenkel T, Clayton RH & Halliday I () Convergence, sampling and total order estimator effects on parameter orthogonality in global sensitivity analysis. PLoS Computational Biology.
Oluwole-ojo O, Zhang H, Howarth M & Xu X () Energy Consumption Analysis of a Continuous Flow Ohmic Heater with Advanced Process Controls. Energies, 16(2), 868-868.
Oluwole-ojo O, Zhang H, Howarth M & Xu X () Model Based Design and Validation of a Batch Ohmic Heating System. Modelling, 2(4), 641-658.
Spendlove J, Xu X, Halliday OJ, Schenkel T & Halliday I () Chromodynamic multirelaxation-time lattice Boltzmann scheme for fluids with density difference. Physical Review E, 102(1).
Burgin K, Spendlove J, Xu X & Halliday I () Kinematics of chromodynamic multicomponent lattice Boltzmann simulation with a large density contrast. Physical Review E, 100(4).
Xu X, Burgin K, Ellis MA & Halliday I () Benchmarking of three-dimensional multicomponent lattice Boltzmann equation. Physical Review E, 96(5).
Halliday I, Xu X & Burgin K () Shear viscosity of a two-dimensional emulsion of drops using a multiple-relaxation-time-step lattice Boltzmann method. Physical Review E, 95(2).
() Transactions of the VŠB - Technical University of Ostrava, Mechanical Series.

Chapters

Tlałka K, Saxton H, Halliday I, Xu X, Taylor D, Narracott A & Malawski M (2024) Local Sensitivity Analysis of a Closed-Loop in Silico Model of the Human Baroregulation, Computational Science – ICCS 2024 (pp. 173-187). Springer Nature Switzerland
Tristano M, Lenzo B, Saxton H, Xu X & Zhang X (2024) Physics-Infused Neural Network-Driven Investigation of Vehicle Sideslip Angle, Lecture Notes in Mechanical Engineering (pp. 358-365). Springer Nature Switzerland
Yubonbanditkun P, Tristano M, Righetti G, Zhang H, Lenzo B & Xu X (2024) Nonlinear Concurrent Control of Yaw and Lateral Dynamics of Electric Vehicles, Lecture Notes in Mechanical Engineering (pp. 643-652). Springer Nature Switzerland
(2017) Case studies on non-linear control theory of the inverted pendulum, The Inverted Pendulum in Control Theory and Robotics: From theory to new innovations (pp. 225-262). Institution of Engineering and Technology

Conference proceedings papers

Alwafi F, Xu X & Alboul L (2022) Visibility Graph (VG) – based path planning method for multi-robot systems. UKRAS22 Conference "Robotics for Unconstrained Environments" Proceedings
Tristano M, Lenzo B, Xu X, Forrier B, D'Hondt T, Risaliti E & Wilhelm E (2022) Real-time implementation of yaw rate and sideslip control through individual wheel torques. 2022 IEEE Vehicle Power and Propulsion Conference (VPPC), 1 November 2022 - 4 November 2022.
Kokkrathoke S & Xu X (2021) Controllability Study of Two-Wheel Robot for Nonlinear Optimal Control and Implementation. 2021 IEEE 9th Conference on Systems, Process and Control (ICSPC 2021), 10 December 2021 - 11 December 2021.
Kokkrathoke S & Xu X (2021) Implementation of Nonlinear Optimal Control of Two-wheel Robot with Extended Kalman Filter. 2021 IEEE International Conference on Automatic Control & Intelligent Systems (I2CACIS), 26 June 2021 - 26 June 2021.
Haire M, Xu X, Alboul L, Penders J & Zhang H (2019) Ship Hull Repair Using a Swarm of Autonomous Underwater Robots: A Self-Assembly Algorithm. 2019 European Conference on Mobile Robots (ECMR), 4 September 2019 - 6 September 2019.
Haire M, Xu X, Alboul L, Penders J & Zhang H (2019) Ship Hull Inspection Using a Swarm of Autonomous Underwater Robots: A Search Algorithm. 2019 IEEE International Symposium on Safety, Security, and Rescue Robotics (SSRR), 2 September 2019 - 4 September 2019.
Font Llenas A, Talamali M, Xu X, Marshall J & Reina A (2018) Quality-sensitive foraging by a robot swarm through virtual pheromone trails. Swarm Intelligence (ANTS 2018), Vol. 11172 (pp 135-149). Rome, Italy, 29 October 2018 - 29 October 2018. View this article in WRRO
Mahfouf M, Xu X, Du C & Banks SP (2011) A Mapping Technique from Rn to I and its Applications to Nonlinear Sliding Control Systems. 18th IFAC World Congress. Milan, Italy, 28 August 2011 - 2 September 2011.

Preprints

Saxton H, Xu X, Schenkel T, Clayton RH & Halliday I (2024) CONVERGENCE, SAMPLING AND TOTAL ORDER ESTIMATOR EFFECTS ON PARAMETER ORTHOGONALITY IN GLOBAL SENSITIVITY ANALYSIS, Cold Spring Harbor Laboratory.
Saxton H, Xu X, Halliday I & Schenkel T (2023) New Perspectives on Sensitivity and Identifiability Analysis using the Unscented Kalman Filter, arXiv.
Saxton H, Halliday I, Schenkel T & Xu X (2023) Assessing Parameter Subset Selection Methods Using a Minimalmechanical Model of the Cardiovascular System, Elsevier BV.
Song Y, Xu X & Banks SP (2007) Automorphic Forms and Reeb-Like Foliations on Three-Manifolds, arXiv.

Grants

Previous Grants

'Modelling and Control of the DC drive Electro Discharge Machine', SIP, England European Regional Development Fund, 08/2022, £46,877, as PI;
'Advanced Control and Optimisation of Electrical Discharge Machining Process', Innovate UK, UKRI, 01/2021, £228,281, as PI;
'Data Assimilated Nonlinear State-Space Modelling of the Human Cardiovascular System', SHU GTA PhD scholarship project, 08/2021, £81,876, as PI;
'Nonlinear Optimal Control of Yaw and Lateral Dynamics of Electric Vehicles', PhD scholarship project - Thai Government, 09/2020, £55,000, as PI;
'Advanced vehicle dynamics models and state estimation to enhance vehicle passenger safety', SHU VC PhD scholarship project, SHU and Siemens Belgium, 07/2020, £65,000, as Co-I;
'Modelling, Control and Analysis of Moderate Electric Field in Food Processing', MEFPROC PhD scholarship project, EU Horizon 2020, 02/2020, £65,000, as Co-I;
'Enhanced Chromodynamic Multi-Component Lattice Boltzmann Method for Drop and Vesicle Modelling', SHU GTA PhD scholarship project, 08/2018, £65,000, as PI;
'Teaching Enhancement Grants', SHU, £3,000, 2016 and 2018, as PI;
'Nonlinear Optimal Control and Its Application to a Two-Wheeled Robot', PhD scholarship project - Thai Government, 01/2018, £53,300, as PI;
'Development of DL_MESO Demonstrator', Summer Bursary from CCP5, EPSRC, 06/2017, £2,900, as Co-I;
'Search and restore: a study of cooperative multi-robot systems', SHU GTA PhD scholarship project, 08/2016, £60,000, as PI;
'Travel Grants', Royal Academy of Engineering and the University of Sheffield, £1,150 (2008), £600 (2009) and £400 (2010), as PI.

Professional activities and memberships: • Member of the Complex Systems Modelling Research Group
• Member of INSIGNEO Institute for in silico Medicine
• Member of IET
• Member and Fellow of HEA
• Member of EPSRC Review College