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Your search keyword '"Tang, Hailong"' showing total 234 results
Start Over Author "Tang, Hailong" Publication Type Academic Journals
234 results on '"Tang, Hailong"'

1. Design of Electromagnetic Compatibility Testing and Control System for Fully Automatic Elevator Control Cabinets Based on Embedded Technology

Author

SONG Laijun, WANG Huifang, NI Minmin, LU Dong, LI Xiaolu, TANG Hailong, and SUN Dandan

Subjects
elevator control cabinet, electromagnetic compatibility, automatic testing, embedded controller, can bus, Control engineering systems. Automatic machinery (General), TJ212-225, Technology
Abstract

In response to the problems of current electromagnetic compatibility testing methods for elevator control cabinets, including low intelligence, cumbersome operation, and lack of elevator system status monitoring, this paper proposes an electromagnetic compatibility testing method for elevator control cabinets and designs a set of electromagnetic compatibility testing and control system for elevator control cabinets. The author constructed an "upper computer+ lower computer" control system architecture, developed an embedded controller based on ARM, designed application software for upper and lower computers of the automatic testing process and control system, implemented such functions as sensor signal acquisition and CAN bus communication for elevator control cabinets, and realized the real-time monitoring of electromagnetic compatibility testing of elevator control cabinets and elevator system status. Then, the author used this system to carry out the conducted immunity, voltage dip, voltage interruption, electrical fast transient pulse group and surge tests on elevator control cabinets, and conducted simulation tests on elevator control cabinets for sensor signal abnormalities, power supply failures, and communication anomalies. The results show that the electromagnetic compatibility testing and control system of the elevator control cabinet operates stably, with accurate data collection and simple operation, accurately and efficiently identifies various types of faults, meets the needs of elevator manufacturers and testing institutions for electromagnetic compatibility testing, and compared with previous testing methods, reduces testing manpower input by about 67%.

Published
2024
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28. Highly efficient ambient temperature photo-oxidation of CH4 to C1 products over CeO2 supported single-atom Fe with oxygen vacancies.

Author

Tang, Hailong, Ma, Yongqing, Zhu, Chuhong, Wang, Min, Zheng, Ganhong, Sun, Xiao, and Wang, Meiling

Abstract

The direct conversion of methane (CH4) to high-value liquid products is of significant importance to address the current environmental and energy crises. Here, we show a kind of CeO2-supported oxygen vacancy (Ov) bound, Fe single-atom catalyst (SAC) that can enable exceptional photocatalytic CH4 conversion to C1 oxygenates with nearly 100% selectivity at ambient temperature. Under optimized experimental conditions, a C1 product yield of 3420 mmol gFe−1 h−1 was realized, largely outperforming a previously reported Rh/CeO2 SAC (1232 mmol gRh−1 h−1 with an oxygenate selectivity of 94%). DFT calculation and experimental investigation are coupled to reveal the mechanism of CH4 conversion. Essentially, single Fe sites serve as electron acceptors and effectively promote photo-induced electron transfer from Ce to Fe via the formed Ce–O–Fe bond, while Ov-induced Ce3+ sites facilitate the adsorption and activation of H2O2 to produce ˙OH, which further activates CH4 and generates various products. The participation of Ov during the catalytic cycle and its synergy with single Fe sites largely boost the overall efficiency of CH4 conversion. [ABSTRACT FROM AUTHOR]

Published
2024
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