Mr. Yizhi Xu Profile

Yizhi Xu

at Changjiang Communications Administration Bureau

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Publications (2)

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Proceedings Article | 28 June 2023 Paper

Coupling capacitor design and optimization for high speed circuits

Yi Zheng, Qiuyuan Huang, Yizhi Xu, Peng Zhou, Min Wang

Proceedings Volume 12720, 1272005 (2023) https://doi.org/10.1117/12.2667917

KEYWORDS: Capacitors, Signal attenuation, Design and modelling, Reflection, Capacitance, Signal processing

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This paper discusses how the coupling capacitor of transmission line in high speed circuit is optimized. Take the 400G bit error tester as an example, the characteristic impedance of the transmission line before and after adding the coupling capacitor is simulated. In order to reduce impact on signal integrity caused by impedance mismatch, the treatment method of voiding is obtained through the impedance calculation formula. By comparing several different voiding scheme proposed by predecessors, on the basis of the previous work, the hollowing treatment is further optimized to study the effect of hollowing size on signal integrity. Then HFSS software is used for modeling and simulation, and the insertion loss and return loss under several different schemes are calculated. It is found that the size of the hollowing process will have a certain impact on the integrity of the signal, and to a certain extent, the larger the hollowing size, the smaller the insertion loss and return loss.

Proceedings Article | 19 October 2022 Paper

Elevator intelligent reservation scheduling system based on digital twin

Yi Xian Zou, Dong Li Hao, Xin Yu Zhang, Yi Zhi Xu

Proceedings Volume 12294, 122943M (2022) https://doi.org/10.1117/12.2639692

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As an important enabling way to realize digital transformation and promote intelligent upgrading, digital twins have been attracting attention from all walks of life, and have moved from theoretical research to practical application. At present, most domestic elevators still use the traditional dispatching system. The traditional elevator dispatching system can't realize intelligent elevator man-machine interaction, which leads to a series of problems such as low efficiency and poor linkage of elevator group control. Thus, this paper designs an intelligent elevator dispatching system based on digital twins, which combines digital twins with artificial intelligence identification technology, internet of things, cloud database technology and so on. The system consists of four parts: physical elevator model, virtual elevator model, elevator twin data model and mobile phone client. Furthermore, the rational allocation of elevator resources is strengthened, and the interaction ability between elevators and passengers is enhanced. While improving the comfort of passengers, it also reduces the energy consumption of the elevator macroscopically.

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