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Your search keyword '"Zhao, Yuexia"' showing total 27 results
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27 results on '"Zhao, Yuexia"'

3. Analysis of Mode and Response Spectrum of an OBS Anti-trawl Sinking Coupling Frame Based on ANSYS Workbench

Author

Zong, Le, Yu, Kaiben, Zhao, Yuexia, Yu, Shengqi, Zhao, Lichuan, Ran, Jun, Yang, Zhiguo, Liu, Baohua, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Wang, Shuren, editor, Li, Jingan, editor, Hu, Kui, editor, and Bao, Xingxian, editor

Published
2023
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5. GA-BP-Based Low-Noise FBG Hydroacoustic Monitoring System with Reference Sensor.

Author

Zhou, Yubin, Zhao, Yuexia, Song, Chengbing, Wang, Jiancun, Xu, Weikun, and Li, Zhengguang

Subjects
*FIBER Bragg gratings, *SOUND pressure, *SIGNAL-to-noise ratio, *SIGNAL processing, *ARRAY processing
Abstract

To address the issue of harsh marine background noise impacting the monitoring signal of fiber-optic hydrophones, we propose a low-noise fiber Bragg grating (FBG) hydroacoustic monitoring system with a reference sensor based on genetic algorithm backpropagation (GA-BP). Through theoretical analysis, we deduce the noise suppression steps of the GA-BP algorithm based on the reference sensor and construct train and test sets based on the data from the reference sensor and monitoring sensor at different times, optimizing the GA-BP algorithm to find the best fitting results and thereby obtaining the low-noise monitoring signal. Experimental results from the anechoic tank show that the proposed method can suppress background noise interference on effective signals and that the suppression effect improves as the background noise increases. The sound pressure sensitivity ranges from −173.76 dB to −171.33 dB at frequencies of 8 kHz to 12 kHz, with a response flatness of less than 2.43 dB. The noise suppression effect is obvious under the condition of poor signal-to-noise ratio (SNR), which can reach more than 18.3 dB. The advantages of the proposed algorithm in array signal processing are further demonstrated by the directivity experiment, which proves that the algorithm has a great potential for engineering applications in harsh marine environment. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Research on the Construction of Excellent Sports Talents Training Base for "Belt and Road" Countries: A Case Study of Capital University of Physical Education and Sports.

Author

XIA Yan, SHI Yan, ZHAO Yuexia, QIAN Wen, and ZHONG Bingshu

Abstract

By using the methods of literature and questionnaire, this paper analyzes the necessity of cultivating excellent sports talents under the "Belt and Road" initiative. Taking Capital University of Physical Education and Sports as an example, it explains how to break through the bottleneck of cultivating excellent sports talents, and puts forward the approaches to constmct the training base of excellent sports talents, namely, strengthening the intercollegiate cooperation with universities along the "Belt and Road" countries, and optimizing the university operation conditions for the excellent sports talent training base for "Belt and Road countries. The purpose is to provide theoretical reference for the construction of excellent sports talents training base for "Belt and Road" countries. [ABSTRACT FROM AUTHOR]

Published
2019
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24. An In Situ Measurement Method for Detecting Dissolved Deep-Sea Sulfur Ion Concentration

Author

赵月霞 Zhao Yuexia, 王洪亮 Wang Hongliang, 何天博 He Tianbo, 丁忠军 Ding Zhongjun, 刘宁武 Liu Ningwu, and 李劲松 Li Jinsong

Subjects
In situ, Measurement method, Materials science, chemistry, Analytical chemistry, chemistry.chemical_element, Electrical and Electronic Engineering, Deep sea, Sulfur, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Ion
Published
2018
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27. Study on SO4 2−/ZrO2-MoO3 in the integrative transformation of cottonseed oil deodorizing distillate.

Author

Li, Cuihua, Zhao, Yuexia, and Dai, Bin

Subjects
ZIRCONIUM oxide, COTTONSEED oil, METHANOL, SCANNING electron microscopy, SULFURIC acid, CATALYTIC activity
Abstract

Abstract: With the integrative transformation of non α-tocopherols, glycerides, free fatty acids, and methyl alcohol in cottonseed oil deodorizing distillate as the target reaction, we prepared highly catalytic SO4 2−/ZrO2-MoO3 solid acid catalyst by precipitation–wet impregnation. The optimal conditions for catalyst preparation were then determined by varying sulfuric acid concentration, MoO3 loading factor, calcination temperature, and calcination time. The structure of SO4 2−/ZrO2-MoO3 solid acid catalyst was then examined by X-ray diffraction (XRD), Brunauer–Emmett–Teller measurements, scanning electron microscopy, and other methods. Results show that the MoO3 loading factor (percentage weight ratio of MoO3 to ZrO2), impregnation concentration of sulfuric acid, and calcination temperature were the most important factors that influenced catalytic activity. The optimal conditions for catalyst preparation were an MoO3 loading factor of 20%, a sulfuric acid impregnation concentration of 0.75mol/L, a calcination temperature of 550°C, and a calcination time of 6h. The obtained catalyst exhibited the highest catalytic activity under these conditions. [Copyright &y& Elsevier]

Published
2012
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