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Your search keyword '"Yan, Linfang"' showing total 24 results
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24 results on '"Yan, Linfang"'

7. An On-Board Control Scheme for Consumer-Level Autonomous Underwater Vehicle in the Intelligent Cyber–Physical Transportation Systems

Author

He, Jingyi, Wen, Jiabao, Yan, Linfang, Xi, Meng, Xiao, Shuai, Chen, Desheng, and Yang, Jiachen

Abstract

In recent years, with the expanding scope of the Intelligent Cyber-Physical Transportation Systems (ICTS), Autonomous Underwater Vehicle (AUV) has also become a hot product in this field that consumers are paying attention to. Consumer-level AUVs have a broad consumer market for underwater detection and search and rescue due to their small size, autonomy, flexibility, and long endurance. The formation of multiple AUVs can complete more diverse and complex tasks. However, consumers can only communicate with AUVs when they float to the surface, which poses a tough challenge to AUV’s formation control. This paper proposes an AUV On-board Control Scheme (AUV-OCS) based on multi-agent reinforcement learning and cloud computing technology to serve consumer-level AUVs, in which the local perception information preprocessed by each AUV is uploaded to the cloud center for data fusion in real-time and a centralized value function is designed to optimize the global decision. The experimental results show that the proposed AUV-OCS can effectively control the AUV cluster to complete underwater task in a predetermined formation for consumers with an average task success rate of 97.4%, and has a certain collision avoidance ability.

Published
2024
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21. Enhancing Network Security Strategies against External Threats to Civil Aircraft

Author

Chen Bin, Yan Linfang, Cao Quanxin, and Fan Chenchen

Subjects
Correctness, Access network, business.industry, Computer science, Aviation, Network security, ComputerApplications_COMPUTERSINOTHERSYSTEMS, 020206 networking & telecommunications, 02 engineering and technology, Computer security, computer.software_genre, Telecommunications network, symbols.namesake, Nash equilibrium, 0202 electrical engineering, electronic engineering, information engineering, symbols, business, Cyberspace, computer, Risk management
Abstract

To satisfy frequent pilots' requirements to access network and data on board, connections from public network domain to flight control network domain even airborne electronics were enabled recently in civil aircrafts. These services change the civil aircraft airborne electronic system from an isolated information island to an open cyberspace, which is vulnerable to new external threats from public network. Some regulations or specifications were raised to prevent threats, such as RTCA DO-326 specification However, practical implementation or evaluations were not reported. In this paper, It was proposed a set of strategies to implement civil aircraft aviation network security technology integration. According to the strategies, It was proposed an algorithm to reduce the impact of external network threat on the safety of the flight. Theoretical analysis based on Nash equilibrium validates the correctness of our strategies and algorithm.

Published
2016

24. Dredging the Charge-Carrier Transfer Pathway for Efficient Low-Dimensional Ruddlesden-Popper Perovskite Solar Cells.

Author

Li P, Yan L, Cao Q, Liang C, Zhu H, Peng S, Yang Y, Liang Y, Zhao R, Zang S, Zhang Y, and Song Y

Abstract

Low-dimensional Ruddlesden-Popper (LDRP) perovskites still suffer from inferior carrier transport properties. Here, we demonstrate that efficient exciton dissociation and charge transfer can be achieved in LDRP perovskite by introducing γ-aminobutyric acid (GABA) as a spacer. The hydrogen bonding links adjacent spacing sheets in (GABA) 2 MA 3 Pb 4 I 13 (MA=CH 3 NH 3 + ), leading to the charges localized in the van der Waals gap, thereby constructing "charged-bridge" for charge transfer through the spacing region. Additionally, the polarized GABA weakens dielectric confinement, decreasing the (GABA) 2 MA 3 Pb 4 I 13 exciton binding energy as low as ≈73 meV. Benefiting from these merits, the resultant GABA-based solar cell yields a champion power conversion efficiency (PCE) of 18.73 % with enhanced carrier transport properties. Furthermore, the unencapsulated device maintains 92.8 % of its initial PCE under continuous illumination after 1000 h and only lost 3 % of its initial PCE under 65 °C for 500 h., (© 2023 Wiley-VCH GmbH.)

Published
2023
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