Jun‐Jun Liu

ORCID: 0000-0002-6567-2137
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Research Areas
  • Stability and Controllability of Differential Equations
  • Advanced Mathematical Modeling in Engineering
  • Advanced Mathematical Physics Problems
  • Numerical methods for differential equations
  • Nonlinear Dynamics and Pattern Formation
  • Model Reduction and Neural Networks
  • Elevator Systems and Control
  • Numerical methods in inverse problems
  • Electric and Hybrid Vehicle Technologies
  • Vibration and Dynamic Analysis
  • Dynamics and Control of Mechanical Systems
  • Advanced Battery Technologies Research
  • Natural Fiber Reinforced Composites
  • Adaptive Control of Nonlinear Systems
  • Electric Vehicles and Infrastructure
  • Phase Change Materials Research
  • Solidification and crystal growth phenomena
  • Advanced Cellulose Research Studies
  • Smart Grid Security and Resilience
  • Innovation in Digital Healthcare Systems
  • Energy, Environment, and Transportation Policies
  • Extremum Seeking Control Systems
  • Inertial Sensor and Navigation
  • Mathematical and Theoretical Epidemiology and Ecology Models
  • Polymer Nanocomposites and Properties

China Academy of Space Technology
2025

Nanjing University of Science and Technology
2025

Taiyuan University of Technology
2016-2024

Shanghai East Hospital
2023

North China University of Water Resources and Electric Power
2022

Changshu Institute of Technology
2020-2021

Chongqing University
2019

Beijing Institute of Technology
2013-2015

Bohai University
2014

Nanjing Agricultural University
2011

In this paper, we are concerned with the boundary stabilization of a one-dimensional anti-stable Schrödinger equation subject to control matched disturbance. We apply both sliding mode (SMC) and active disturbance rejection (ADRC) deal By SMC approach, is supposed be bounded only. The existence uniqueness solution for closed-loop system proved 'reaching condition' obtained. Considering usually requires large gain may exhibit chattering behavior, develop ADRC attenuate which derivative also...

10.1002/rnc.2977 article EN International Journal of Robust and Nonlinear Control 2013-03-04

We consider stabilisation for a linear ordinary differential equation system with input dynamics governed by heat equation, subject to boundary control matched disturbance. The active disturbance rejection approach is applied estimate, in real time, the both constant high gain and time-varying gain. cancelled feedback loop. closed-loop systems are shown, respectively, be practically stable asymptotically stable.

10.1080/00207179.2015.1010179 article EN International Journal of Control 2015-01-28

Summary In this paper, we are concerned with a cascade of ODE‐wave systems the control actuator‐matched disturbance at boundary wave equation. We use sliding mode (SMC) technique and active rejection method to overcome disturbance, respectively. By SMC approach, is supposed be bounded only. The existence uniqueness solution for closed‐loop via proved, monotonicity ‘reaching condition’ presented without differentiation function, which it may not always exist weak system. Considering that...

10.1002/rnc.3572 article EN International Journal of Robust and Nonlinear Control 2016-05-31

In this paper, we consider the stabilization of a one-dimensional wave equation with nonlinear van der Pol type boundary condition that covers antistable boundary, and subject to control matched disturbance on other side. Due disturbance, uncontrolled system may present spatiotemporal chaotic, period-doubling bifurcation, some dynamical behaviors. We will deal which is supposed be bounded only, by integral sliding mode control. The well-posedness for closed-loop proved "reaching condition"...

10.1109/tac.2018.2874746 article EN IEEE Transactions on Automatic Control 2018-10-09

ABSTRACT This paper investigates an adaptive finite‐time non‐singular terminal sliding mode control method (AFNTSMC) for a rigid spacecraft rapid attitude maneuver control. Meanwhile, the suffer from adverse challenges such as input hysteresis, external disturbances, and system uncertainty. To estimate lumped disadvantage extended state disturbance observer (ESDO) is applied, ESDO can track quickly accurately. mitigate effects of residuals, law applied. Lyapunov theory applied to confirm...

10.1002/rnc.7896 article EN International Journal of Robust and Nonlinear Control 2025-02-21

Pre-diabetes and non-alcoholic fatty liver disease (NAFLD) are associated with an unhealthy lifestyle pose extremely high costs to the healthcare system. In this study, we aim explore whether individualized aerobic exercise (AEx) low carbohydrate diet (LCh) intervention affect hepatic fat content (HFC) in pre-diabetes via modification of gut microbiota composition other post-interventional effects. A 6-month randomized follow-up is conducted from January 2013 December 2015. The target sample...

10.1186/1471-2458-14-48 article EN cc-by BMC Public Health 2014-01-17

In this article, we consider robust output tracking for a Schrödinger equation with external disturbances in all possible channels. The challenge of the problem comes from fact that observation operator is unbounded and regulated control are noncollocated. An observer-based approach adopted investigation. We first select specially some coefficients to obtain nominal system, which coupled PDE+ODE system. For design feedforward by solving related regulator equation. observer then designed...

10.1109/tac.2021.3056599 article EN IEEE Transactions on Automatic Control 2021-02-03

Energy management strategies play a critical role in performance optimization of plug-in hybrid electric vehicles (PHEVs). In order to attain effective energy distribution PHEVs, predictive strategy is proposed this study based on real-time traffic information. First, an exponentially varied model for the velocity prediction established, which tunable decay coefficient regulated by supported vector machine (SVM). manner, precision improved. Then, properly simplifying powertrain model, state...

10.1109/access.2019.2933015 article EN cc-by IEEE Access 2019-01-01

Summary In this paper, we are concerned with the output feedback exponential stabilization of a cascaded parabolic partial differential equation–ordinary equation system where control end suffers from external uncertain disturbance. We design an unknown input–type state observer disturbance estimator term, which is used to stabilize and compensate simultaneously. The stabilizing designed for by three‐step backstepping transformation, corresponding observer‐based original system. Finally,...

10.1002/rnc.4318 article EN International Journal of Robust and Nonlinear Control 2018-09-14

Abstract In this paper, we are concerned with the output reference signal tracking for a one dimensional Schrödinger equation subject to general harmonic disturbance at end and control another end. Based on signal, design state system feedback cancel track signal. We show that whole closed‐loop is well‐posed performance The numerical experiments carried out illustrate approach effective.

10.1002/asjc.1588 article EN Asian Journal of Control 2017-08-14

In this paper, we consider the output feedback stabilisation of a cascaded ODE-Heat system with Dirichlet boundary interconnection external disturbance flowing control end, design an unknown input type state observer estimator term aid known auxiliary system, which is used to not only stabilise but compensate simultaneously. The stabilising designed for by classical backstepping transformation, corresponding observer-based original system. As result, closed-loop proved be exponentially...

10.1080/00207179.2019.1577563 article EN International Journal of Control 2019-02-13

Monitoring abnormal viscosity in biological systems is important for basic research and clinical applications. Fluorescence imaging technology adaptable the visualization of tumor tissues due to its comprehensive features. However, fluorescence detection intracellular samples remains challenging. We developed a promising near-infrared fluorescent probe, M556, measurement. which targets mitochondria, was successfully applied monitor mitochondrial living cells. Furthermore, M556 demonstrated...

10.1016/j.heliyon.2023.e18704 article EN cc-by-nc-nd Heliyon 2023-07-26

The influence of the rice husks powder (RHP) content and its particle size distribution on composite’s tensile strength, fracturing elongation ratio, flexural strength elastic modulus has been investigated. Respective water absorption thermal properties PP composites incorporated with different proportion RHP have also analyzed. microstructure fractured surfaces was further observed in scanning electron microscopy (SEM). results showed that 245 μm higher mechanical properties. ratio decrease...

10.4028/www.scientific.net/amr.217-218.347 article EN Advanced materials research 2011-03-01

Abstract This paper is concerned with an optimal control problem for the phase-fieldtransition system state constraint and obstacle. After showing relationshipbetween its approximation, we derive Pontryagin’smaximum principle of our original by using one theapproximate problems. MSC: 49K20, 49J20, 74N25.

10.1186/1687-2770-2013-234 article EN cc-by Boundary Value Problems 2013-11-08

Abstract A non‐collocated output tracking problem for a flexible string with tip payload at one end was studied in this paper, which is expected to describe by wave equation coupled ordinary differential (ODE) system. The regulated and the reference trajectory signal unknown frequency amplitude are boundary control input. An adaptive approach has been developed determine of disturbance constituting an auxiliary internal model structure. In order regulate exponential tracking, proposed...

10.1002/acs.3867 article EN International Journal of Adaptive Control and Signal Processing 2024-06-24

10.1109/ccdc62350.2024.10587704 article EN 2022 34th Chinese Control and Decision Conference (CCDC) 2024-05-25
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