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Quan Zhu

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Quan Zhu

Professor in Control Systems


Improved gradient descent algorithms for time-delay rational state-space systems: intelligent search method and momentum method (2020)
Journal Article
Chen, J., Zhu, Q., Hu, M., Guo, L., & Narayan, P. (in press). Improved gradient descent algorithms for time-delay rational state-space systems: intelligent search method and momentum method. Nonlinear Dynamics,

This study proposes two improved gradient descent parameter estimation algorithm- s for rational state-space models with time-delay. These two algorithms, based on intelligent search method and momentum method, can simultaneously estimate the time-de... Read More about Improved gradient descent algorithms for time-delay rational state-space systems: intelligent search method and momentum method.

U-model based predictive control for nonlinear processes with input delay (2019)
Journal Article
Geng, X., Zhu, Q., Liu, T., & Na, J. (2019). U-model based predictive control for nonlinear processes with input delay. Journal of Process Control, 75, 156-170. https://doi.org/10.1016/j.jprocont.2018.12.002

In this paper, a general control scheme is proposed for nonlinear dynamic processes with input delay described by different models, including polynomial models, state-space models, nonlinear autoregressive moving average with eXogenous inputs (NARMAX... Read More about U-model based predictive control for nonlinear processes with input delay.

Adaptive finite-time stabilization of chaotic flow with a single unstable node using a nonlinear function-based global sliding mode (2018)
Journal Article
Mobayen, S., Ma, J., Pujol-Vazquez, G., Acho, L., & Zhu, Q. (2019). Adaptive finite-time stabilization of chaotic flow with a single unstable node using a nonlinear function-based global sliding mode. Iranian Journal of Science and Technology Transactions of Electrical Engineering, 43(1), 339-347. https://doi.org/10.1007/s40998-018-0153-6

© 2018, Shiraz University. This article presents a novel adaptive finite-time stabilization technique based on global sliding mode for disturbed chaotic flow with a single unstable node. The considered chaotic flow has unusual characteristics contain... Read More about Adaptive finite-time stabilization of chaotic flow with a single unstable node using a nonlinear function-based global sliding mode.

Bias compensation recursive algorithm for dual-rate rational models (2018)
Journal Article
Chen, J., Liu, Y., & Zhu, Q. (2018). Bias compensation recursive algorithm for dual-rate rational models. IET Control Theory and Applications, 12(16), 2184-2193. https://doi.org/10.1049/iet-cta.2018.5368

© The Institution of Engineering and Technology 2018. In dual-rate rational systems, some output data are missing (unmeasurable) to make the traditional recursive least squares (RLS) parameter estimation algorithms invalid. In order to overcome this... Read More about Bias compensation recursive algorithm for dual-rate rational models.

Multivariate analysis of variance for maximising the diagnosing accuracy in differentiating DU from BOO in males (2018)
Journal Article
Li, R., Gammie, A., Zhu, Q., & Nibouche, M. (2018). Multivariate analysis of variance for maximising the diagnosing accuracy in differentiating DU from BOO in males. Neurourology and Urodynamics, 37(S5), S327-S328. https://doi.org/10.1002/nau.23760

Detrusor underactivity (DU) and bladder outlet obstruction (BOO) bother almost half of elder men. Although the treatment is different for these two lower urinary tract symptoms, invasive pressure flow studies remains the only gold standard for diagno... Read More about Multivariate analysis of variance for maximising the diagnosing accuracy in differentiating DU from BOO in males.

Median frequency and sum of amplitude changes in rising slope: Two potential non-invasive indicators for differentiating DU from BOO in males (2018)
Journal Article
Li, R., Gammie, A., Zhu, Q., & Nibouche, M. (2018). Median frequency and sum of amplitude changes in rising slope: Two potential non-invasive indicators for differentiating DU from BOO in males. Neurourology and Urodynamics, 37(S5), S248-S249. https://doi.org/10.1002/nau.23760

It remains a challenge to non-invasively differentiate detrusor underactivity (DU) from bladder outlet obstruction (BOO) in males, and the gold standard is pressure flow studies, which is invasive, relatively expensive and may cause bleeding and infe... Read More about Median frequency and sum of amplitude changes in rising slope: Two potential non-invasive indicators for differentiating DU from BOO in males.

Urine flow rate shape template and intermittent flow in males (2018)
Journal Article
Li, R., Gammie, A., Zhu, Q., & Nibouche, M. (2018). Urine flow rate shape template and intermittent flow in males. Neurourology and Urodynamics, 37(S5), 1-430. https://doi.org/10.1002/nau.23760

Uroflowmetry serves as a preliminary urodynamic test for physicians to indicate the possible cause of lower urinary tract symptoms. Alongside the most researched parameter maximum flow rate (Qmax), the shape of urine flow rate curve is also reported... Read More about Urine flow rate shape template and intermittent flow in males.

Urine flow rate curve shapes and their descriptors (2018)
Journal Article
Li, R., Zhu, Q., Nibouche, M., & Gammie, A. (2018). Urine flow rate curve shapes and their descriptors. Neurourology and Urodynamics, 37(8), 2938-2944. https://doi.org/10.1002/nau.23743

© 2018 Wiley Periodicals, Inc. Aims: To review the descriptors and definitions of urine flow rate curve shape with a view to promoting greater clarity and to propose standard terms. Methods: A search was made in the PubMed and ICS standardization do... Read More about Urine flow rate curve shapes and their descriptors.

Decentralized adaptive force/position control of reconfigurable manipulator based on soft sensors (2018)
Journal Article
Du, Y., & Zhu, Q. (2018). Decentralized adaptive force/position control of reconfigurable manipulator based on soft sensors. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 232(9), 1260-1271. https://doi.org/10.1177/0959651818779848

© IMechE 2018. Two soft sensor control methods are proposed to deal with force/position control of reconfigurable manipulator without using wrist force sensors. First, modeling uncertainties and coupled interconnection terms between the subsystems ar... Read More about Decentralized adaptive force/position control of reconfigurable manipulator based on soft sensors.

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