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Your search keyword '"Zhao, Ming-jie"' showing total 159 results
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159 results on '"Zhao, Ming-jie"'

6. Collision-Free Trajectory Design for 2D Persistent Monitoring Using Second-Order Agents

Author

Wang, Yan-Wu, Zhao, Ming-Jie, Yang, Wu, Zhou, Nan, and Cassandras, Christos G.

Subjects
Mathematics - Optimization and Control
Abstract

This paper considers a two-dimensional persistent monitoring problem by controlling movements of second-order agents to minimize some uncertainty metric associated with targets in a dynamic environment. In contrast to common sensing models depending only on the distance from a target, we introduce an active sensing model which considers the distance between an agent and a target, as well as the agent's velocity. We propose an objective function which can achieve a collision-free agent trajectory by penalizing all possible collisions. Applying structural properties of the optimal control derived from the Hamiltonian analysis, we limit agent trajectories to a simpler parametric form under a family of 2D curves depending on the problem setting, e.g. ellipses and Fourier trajectories. Our collision-free trajectories are optimized through an event-driven Infinitesimal Perturbation Analysis (IPA) and gradient descent method. Although the solution is generally locally optimal, this method is computationally efficient and offers an alternative to other traditional time-driven methods. Finally, simulation examples are provided to demonstrate our proposed results., Comment: 13 pages arXiv, to be published in IEEE Transactions on Control of Network Systems

Published
2019

30. Indium-free GZO thin films prepared using plasma-enhanced atomic layer deposition: toward thin film transistor application

Author

Shi, Chun-Yan, primary, Chen, Qi-Zhen, additional, Zhang, Zhi-Xuan, additional, Hsu, Chia-Hsun, additional, Zhao, Ming-Jie, additional, Zhang, Xiao-Ying, additional, Gao, Peng, additional, Wu, Wan-Yu, additional, Wuu, Dong-Sing, additional, Huang, Chien-Jung, additional, Lien, Shui-Yang, additional, and Zhu, Wen-Zhang, additional

Published
2022
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40. Substrate temperature-controlled precursor reaction mechanism of PEALD-deposited MoOx thin films.

Author

Wang, Chen, Bao, Chun-Hui, Wu, Wan-Yu, Hsu, Chia-Hsun, Zhao, Ming-Jie, Zhang, Xiao-Ying, Lien, Shui-Yang, and Zhu, Wen-Zhang

Subjects
THIN films, ATOMIC layer deposition, MOLYBDENUM oxides, TEMPERATURE effect
Abstract

Molybdenum oxide (MoOx) films had been grown by using plasma-enhanced atomic layer deposition (PEALD) with Mo(CO)6 precursor and O2 plasma reactant in a substrate temperature range of 150–275 °C. The effect of substrate temperature on the chemical, optical, surface morphological, and structural properties of the MoOx thin films was explored systematically. The substrate temperature performed a significant role in depositing MoOx films and three kinds of different precursor reaction mechanisms of PEALD-MoOx thin films handled by substrate temperature were presented firstly and illustrated comprehensively. The growth of amorphous MoOx film was observed between 150 and 175 °C. Moreover, an obvious transition to polycrystalline deposition was demonstrated for the deposition temperatures at 225 °C and higher. Both Mo6+ and Mo5+ valence states existed in all prepared MoOx films, which inferred the deficient lattice oxygen in the films. And the proportion of non-lattice oxygen reduced with the increasing deposition temperature. The elaboration of deposition mechanism of PEALD-MoOx films provides a guideline for the preparation of high-quality MoOx films. [ABSTRACT FROM AUTHOR]

Published
2022
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