2026

• S. Y. Lee and N. K. Kwon, “PD dynamic output-feedback admissibilization for descriptor systems with uniform input quantization,” Communications in Nonlinear Science and Numerical Simulation, vol. 158, p. 109872, Jul. 2026, doi: 10.1016/j.cnsns.2026.109872.

• S. Y. Lee, N. K. Kwon*, and J. Park*, “Stability analysis and stabilization synthesis of asynchronously sampled-data systems via integral looped functionals composed of bivariate functions,” Mathematics and Computers in Simulation, vol. 243, pp. 221–236, May 2026, doi: 10.1016/j.matcom.2025.11.031.

2025

• J. W. Lee, J. M. Rho, S. G. Park, H. M. An, M. Kim*, and S. Y. Lee*, “Improved Adaptive Sliding Mode Control Using Quasi-Convex Functions and Neural Network-Assisted Time-Delay Estimation for Robotic Manipulators,” Sensors, vol. 25, no. 14, p. 4252, Jul. 2025, doi: 10.3390/s25144252.

• S. Oh, K. M. Lee, S. Y. Lee, and N. K. Kwon*, “Movement Direction Classification Using Low-Resolution ToF Sensor and LSTM-Based Neural Network,” JSAN, vol. 14, no. 3, p. 61, Jun. 2025, doi: 10.3390/jsan14030061.

• J. Park and S. Y. Lee*, “A novel looped functional for stability analysis of asynchronous sampled‐data systems,” Asian Journal of Control, vol. 27, no. 1, pp. 41–50, Jan. 2025, doi: 10.1002/asjc.3547.

• J. Park and S. Y. Lee*, “Consecutive time‐intervals‐dependent looped functionals for stability analysis of linear systems with asynchronous sampling,” Intl J Robust & Nonlinear, vol. 35, no. 2, pp. 496–510, Jan. 2025, doi: 10.1002/rnc.7658.

• S. Y. Lee and J. Park*, “Stabilization of Neutral Time-Delay Systems With Actuator Saturation via a Sampled-Data Control Approach,” IEEE Access, vol. 13, pp. 178293–178301, 2025, doi: 10.1109/ACCESS.2025.3620850.

2024

• H. M. An, J. W. Lee, D. H. Seo, and S. Y. Lee*, “An Adaptive Sliding Mode Control With Novel Sliding Variable-Based Adaptive Law for Disturbed Robot Manipulators,” IEEE Access, vol. 12, pp. 165227–165235, 2024, doi: 10.1109/ACCESS.2024.3493882.

• S. Y. Lee and J. Park*, “An enhanced looped-functional framework for stability analysis of sampled-data systems,” Journal of the Franklin Institute, vol. 361, no. 10, p. 106901, Jul. 2024, doi: 10.1016/j.jfranklin.2024.106901.

• S. Y. Lee and J. Park*, “Sampled-data stabilization for networked control systems under deception attack and the transmission delay,” Communications in Nonlinear Science and Numerical Simulation, vol. 131, p. 107817, Apr. 2024, doi: 10.1016/j.cnsns.2024.107817.

• D. H. Seo, J. W. Lee, H. M. An, and S. Y. Lee*, “An Adaptive Sliding Mode Control Using a Novel Adaptive Law Based on Quasi-Convex Functions and Average Sliding Variables for Robot Manipulators,” Electronics, vol. 13, no. 19, Art. no. 19, Jan. 2024, doi: 10.3390/electronics13193940.

2023

• J. Park, N. K. Kwon, and S. Y. Lee*, “Extended affine bessel summation inequalities: Applications to stability analysis of linear discrete-time systems with time-varying delays,” Applied Mathematics and Computation, vol. 451, p. 128025, Aug. 2023, doi: 10.1016/j.amc.2023.128025.

2022

• M. Park, S. Y. Lee, J. S. Hong, and N. K. Kwon*, “Deep Deterministic Policy Gradient-Based Autonomous Driving for Mobile Robots in Sparse Reward Environments,” Sensors, vol. 22, no. 24, Art. no. 24, Jan. 2022, doi: 10.3390/s22249574.

2021

• N. K. Kwon and S. Y. Lee*, “An Affine Integral Inequality of an Arbitrary Degree for Stability Analysis of Linear Systems With Time-Varying Delays,” IEEE Access, vol. 9, pp. 51958–51969, 2021, doi: 10.1109/ACCESS.2021.3070149.

2020

• N. K. Kwon and S. Y. Lee*, “Novel Equalities for Stability Analysis of Asynchronous Sampled-Data Systems,” IEEE Access, vol. 8, pp. 177195–177205, 2020, doi: 10.1109/ACCESS.2020.3026736.

• S. Y. Lee and N. K. Kwon*, “Proportional-Derivative State-Feedback Control for Singular Systems With Input Quantization,” IEEE Access, vol. 8, pp. 160065–160069, 2020, doi: 10.1109/ACCESS.2020.3020069.

2019

• S. Y. Lee, J. Park, and P. Park*, “Bessel summation inequalities for stability analysis of discrete‐time systems with time‐varying delays,” Int J Robust Nonlinear Control, vol. 29, no. 2, pp. 473–491, Jan. 2019, doi: 10.1002/rnc.4398.

• J. Park, S. Y. Lee, and P. Park*, “A Less Conservative Stability Criterion for Discrete-Time Lur’e Systems With Sector and Slope Restrictions,” IEEE Trans. Automat. Contr., vol. 64, no. 10, pp. 4391–4395, Oct. 2019, doi: 10.1109/TAC.2019.2899079.

2018

• S. Y. Lee, W. I. Lee, and P. Park*, “Orthogonal-polynomials-based integral inequality and its applications to systems with additive time-varying delays,” Journal of the Franklin Institute, vol. 355, no. 1, pp. 421–435, Jan. 2018, doi: 10.1016/j.jfranklin.2017.11.011.

• W. I. Lee, S. Y. Lee, and P. Park*, “Affine Bessel–Legendre inequality: Application to stability analysis for systems with time-varying delays,” Automatica, vol. 93, pp. 535–539, Jul. 2018, doi: 10.1016/j.automatica.2018.03.073.

• J. Park, S. Y. Lee, and P. Park*, “An improved fragmentation approach to sampled-data synchronization of chaotic Lur’e systems,” Nonlinear Analysis: Hybrid Systems, vol. 29, pp. 333–347, Aug. 2018, doi: 10.1016/j.nahs.2018.02.006.

• J. Park, S. Y. Lee, and P. Park*, “An improved stability criteria for neutral-type Lur’e systems with time-varying delays,” Journal of the Franklin Institute, vol. 355, no. 12, pp. 5291–5309, Aug. 2018, doi: 10.1016/j.jfranklin.2018.05.014.

2017

• S. Y. Lee, W. I. Lee, and P. Park*, “Improved stability criteria for linear systems with interval time-varying delays: Generalized zero equalities approach,” Applied Mathematics and Computation, vol. 292, pp. 336–348, Jan. 2017, doi: 10.1016/j.amc.2016.07.015.

• S. Y. Lee, W. I. Lee, and P. Park*, “Polynomials-based integral inequality for stability analysis of linear systems with time-varying delays,” Journal of the Franklin Institute, vol. 354, no. 4, pp. 2053–2067, Mar. 2017, doi: 10.1016/j.jfranklin.2016.12.025.

• S. Y. Lee, W. I. Lee, and P. Park*, “Polynomials-based summation inequalities and their applications to discrete-time systems with time-varying delays: Polynomials Based Summation Inequalities,” Int. J. Robust. Nonlinear Control, 2017, doi: 10.1002/rnc.3755.

• S. Y. Lee, W. I. Lee, and P. Park*, “Stability analysis of discrete-time systems with time-varying delays: generalized zero equalities approach: STABILITY ANALYSIS OF DISCRETE-TIME SYSTEMS WITH TIME-VARYING DELAYS,” Int. J. Robust. Nonlinear Control, vol. 27, no. 6, pp. 981–999, Apr. 2017, doi: 10.1002/rnc.3613.

• W. I. Lee, S. Y. Lee, and P. Park*, “A combined reciprocal convexity approach for stability analysis of static neural networks with interval time-varying delays,” Neurocomputing, vol. 221, pp. 168–177, Jan. 2017, doi: 10.1016/j.neucom.2016.09.074.

2016

• W. I. Lee, S. Y. Lee, and P. Park*, “A combined first- and second-order reciprocal convexity approach for stability analysis of systems with interval time-varying delays,” Journal of the Franklin Institute, vol. 353, no. 9, pp. 2104–2116, Jun. 2016, doi: 10.1016/j.jfranklin.2016.03.017.

• P. Park*, S. Y. Lee, and W. I. Lee, “New stability analysis for discrete time-delay systems via auxiliary-function-based summation inequalities,” Journal of the Franklin Institute, vol. 353, no. 18, pp. 5068–5080, Dec. 2016, doi: 10.1016/j.jfranklin.2016.07.011.

• P. Park*, W. I. Lee, and S. Y. Lee, “Auxiliary function-based integral/summation inequalities: Application to continuous/discrete time-delay systems,” Int. J. Control Autom. Syst., vol. 14, no. 1, pp. 3–11, Feb. 2016, doi: 10.1007/s12555-015-2002-y.

2015

• W. I. Lee, S. Y. Lee, and P. Park*, “Improved stability criteria for recurrent neural networks with interval time-varying delays via new Lyapunov functionals,” Neurocomputing, vol. 155, pp. 128–134, May 2015, doi: 10.1016/j.neucom.2014.12.040.

• P. Park*, W. I. Lee, and S. Y. Lee, “Auxiliary function-based integral inequalities for quadratic functions and their applications to time-delay systems,” Journal of the Franklin Institute, vol. 352, no. 4, pp. 1378–1396, Apr. 2015, doi: 10.1016/j.jfranklin.2015.01.004.

2014

• W. I. Lee, S. Y. Lee, and P. Park*, “Improved criteria on robust stability and H∞ performance for linear systems with interval time-varying delays via new triple integral functionals,” Applied Mathematics and Computation, vol. 243, pp. 570–577, Sep. 2014, doi: 10.1016/j.amc.2014.05.116.