Fabrication of 3D photonic crystals with self-assembled colloidal spheres as the template

Ph.DDOCTOR OF PHILOSOPH

Double Asynchronous Switching Control for Takagi–Sugeno Fuzzy Markov Jump Systems via Adaptive Event-Triggered Mechanism

This article addresses the issue of adaptive event- triggered H∞ control for Markov jump systems based on Takagi-Sugeno (T-S) fuzzy model. Firstly, a new double asynchronous switching controller is presented to deal with the problem of the mismatch of premise variables and modes between the controller and the plant, which is widespread in real network environment. To further reduce the power consumption of communication, a switching adaptive event-triggered mechanism is adopted to relieve the network transmission pressure while ensuring the control effect. In addition, a new Lyapunov-Krasovskii functional (LKF) is constructed to reduce conservatism by introducing the membership functions (MFs) and time-varying delays informa- tion. Meanwhile, the invariant set is estimated to ensure the stability of the system. And the disturbance rejection ability is measured by the optimal H∞ performance index. Finally, two examples are presented to demonstrate the effectiveness of the proposed approach

Asynchronous switching control for fuzzy Markov jump systems with periodically varying delay and its application to electronic circuits

This article focuses on addressing the issue of asynchronous H∞ control for Takagi-Sugeno (T-S) fuzzy Markov jump systems with generally incomplete transition probabilities (TPs). The delay is assumed to vary periodically, resulting in one monotonically increasing interval and one monotonically decreasing interval during each period. Meanwhile, a new Lyapunov-Krasovskii functional (LKF) is devised, which depends on membership functions (MFs) and two looped functions formulated for the monotonic intervals. Since the modes and TPs of the original system are assumed to be unavailable, an asynchronous switching fuzzy controller on the basis of hidden Markov model is proposed to stabilize the fuzzy Markov jump systems (FMJSs) with generally incomplete TPs. Consequently, a stability criterion with improved practicality and reduced conservatism is derived, ensuring the stochastic stability and H∞ performance of the closed-loop system. Finally, this technique is employed to the tunnel diode circuit system, and a comparison example is given, which verifies the practicality and superiority of the method

Efficacy and safety of hydrogen gas versus standard therapy in Chinese patients with cerebral infarction: A pilot study

Purpose: To evaluate the efficacy and safety of hydrogen (H2) gas versus standard therapy in Chinese patients with acute cerebral infarction (ACI)Method: Chinese patients with ACI who had National Institutes of Health stroke scale (NIHSS) scores of 2 - 6 were enrolled and randomized to receive hydrogen gas through inhalation route or standard therapy. Hydrogen gas (3 %) was administered twice daily for 1 hour each over a period of 2 weeks using a facial mask (non-rebreathing). Standard treatment included edaravone 30 mg (iv every 12 h + antiplatelet drugs for 2 weeks. Efficacy endpoints were change in vital signs, change in NIHSS scores from baseline, change in magnetic resonance imaging (MRI) signal intensity, and improvement in rehabilitation index. Safety was also assessed.Results: Data for 200 patients were analyzed. Patients treated with H2 gas had significantly greater improvement in NIHSS score than patients treated with standard therapy. This indicates that the neurological improvement was significantly greater in patients treated with H2 gas than those that received standard therapy for all the days tested (p < 0.05). The onset of NIHSS score reduction was faster in patients treated with H2 gas when compared to standard therapy. Furthermore, H2 gas demonstrated significant improvement in MRI signal Intensity score, which indicates that H2 gas was effective in recovery of infraction site.Conclusion: The findings of this study show that H2 gas administered via the inhalation route is effective and safe in Chinese patients with acute cerebral infarction, and is therefore, superior to standard therapy