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213 results on '"Zhao, Yalin"'

21. Theoretical and experimental study on time-domain monopole time reversal method with excluding autocorrelation.

Author

Geng, Mingxin, Shen, Chen, Ma, Jiangang, Wei, Xiaolong, Wang, Lv, and Zhao, Yalin

Subjects
TIME reversal, SIGNAL-to-noise ratio, COMPUTER simulation, LOCALIZATION (Mathematics), NOISE, ACOUSTIC localization, AUTOCORRELATION (Statistics)
Abstract

Monopole time reversal is an advanced noise source localization technique, but its sidelobe level in localizing sound sources is greatly affected by noise, leading to a decrease in the accuracy of sound source localization under a low signal-to-noise ratio. To address this issue, this paper proposes a time-domain monopole time reversal technique that excludes autocorrelation to reduce the impact of noise on sound source localization results. Numerical simulation and experimental results show that, compared to conventional monopole time reversal techniques, the proposed method can effectively reduce the sidelobes in sound source localization results and achieve accurate sound source localization under −20 dB low signal-to-noise ratio conditions. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Research on noise reduction methods for indoor substations based on resonant sound absorption

Author

Ma, Jiangang, Geng, Mingxin, Zhao, Yalin, Wang, Lv, Fan, Chuang, Guo, Jipu, Yu, Xiaobing, Ma, Jiangang, Geng, Mingxin, Zhao, Yalin, Wang, Lv, Fan, Chuang, Guo, Jipu, and Yu, Xiaobing

Abstract

Aiming to reduce the impact of substation noise on the lives of surrounding residents, improving the low and middle frequencies acoustic performance of traditional resistive mufflers in indoor substations is significant. The paper is based on the resonance sound absorption mechanism, and for the first time applies multi-frequency resonance noise reduction technology to the research field of indoor substation noise control, proposing a multi-frequency resonant muffling structure. The acoustic performance of the proposed muffler unit is investigated through theoretical and numerical analysis. The measured noise data of the indoor substation is used as sound excitation in the numerical analysis. The results show that at frequencies of 100 Hz, 200 Hz, 300 Hz, 400 Hz, and 500 Hz, the noise in indoor substations is significantly reduced by the multi-frequency resonant muffling structure. The paper provides references for the application of multi-frequency resonant mufflers in the field of noise control of indoor substations.

Published
2024

24. Enhancing cryogenic thermal conductivity of epoxy composites through the incorporation of boron nitride nanosheets/nanodiamond aerogels prepared by directional‐freezing method

Author

Zhou, Zhengrong, primary, Wu, Zhixiong, additional, Liu, Huiming, additional, Huang, Chuanjun, additional, Wang, Tao, additional, Zhao, Yalin, additional, Miao, Zhicong, additional, Xiang, Yue, additional, Geng, Zhen, additional, He, Feng, additional, Xu, Dong, additional, Huang, Rongjin, additional, and Li, Laifeng, additional

Published
2023
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27. Correction to: Genetic risk of clozapine-induced leukopenia and neutropenia: a genome-wide association study

Author

Chen, Jianhua, Yang, Ping, Zhang, Qian, Chen, Ruirui, Wang, Peng, Liu, Benxiu, Sun, Wensheng, Jian, Xuemin, Xiang, Siying, Zhou, Juan, Li, Ningning, Wang, Ke, Gao, Chengwen, Wen, Yanqin, Wu, Chuanhong, Zhang, Jinmai, Zhao, Yalin, Yang, Qiangzhen, Li, Meihang, Stewart, Robert, Sun, Yuanchao, Pan, Dun, Niu, Yujuan, Wang, Zhuo, Xu, Yifeng, Li, Xingwang, He, Lin, Li, Zhiqiang, and Shi, Yongyong

Published
2021
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28. Genetic risk of clozapine-induced leukopenia and neutropenia: a genome-wide association study

Author

Chen, Jianhua, Yang, Ping, Zhang, Qian, Chen, Ruirui, Wang, Peng, Liu, Benxiu, Sun, Wensheng, Jian, Xuemin, Xiang, Siying, Zhou, Juan, Li, Ningning, Wang, Ke, Gao, Chengwen, Wen, Yanqin, Wu, Chuanhong, Zhang, Jinmai, Zhao, Yalin, Yang, Qiangzhen, Li, Meihang, Stewart, Robert, Sun, Yuanchao, Pan, Dun, Niu, Yujuan, Wang, Zhuo, Xu, Yifeng, Li, Xingwang, He, Lin, Li, Zhiqiang, and Shi, Yongyong

Published
2021
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30. Enhancing cryogenic thermal conductivity of epoxy composites through the incorporation of boron nitride nanosheets/nanodiamond aerogels prepared by directional‐freezing method.

Author

Zhou, Zhengrong, Wu, Zhixiong, Liu, Huiming, Huang, Chuanjun, Wang, Tao, Zhao, Yalin, Miao, Zhicong, Xiang, Yue, Geng, Zhen, He, Feng, Xu, Dong, Huang, Rongjin, and Li, Laifeng

Subjects
THERMAL conductivity, BORON nitride, NANODIAMONDS, EPOXY resins, AEROGELS, PACKAGING materials
Abstract

In the realm of electronic circuits, materials with high thermal conductivity are sought after as ideal packaging components. It is crucial that such materials not only possess excellent thermal conductivity, but also maintain desirable dielectric properties. To this end, boron nitride nanosheets (BNNS) and BNNS/nanodiamond (ND) aerogels with a three‐dimensional (3D) structure using the ice‐template method were prepared. Subsequently, these aerogels were utilized as a framework to produce 3D‐BNNS/epoxy and 3D‐BNNS/ND/epoxy composites via the vacuum‐assisted impregnation method, which exhibit enhanced anisotropic thermal conductivity. Furthermore, the thermal conductivity exhibited by the 3D‐BNNS/epoxy composites outperforms those containing randomly distributed BNNS. The experiment also reveals sintering the aerogel at elevated temperatures to remove the PVA can significantly improve the thermal conductivity exhibited by the 3D‐BNNS/epoxy and 3D‐BNNS/ND/epoxy composites. Importantly, the 3D‐BNNS/ND/epoxy composites illustrate exceptional thermal conductivity values of 1.326 W/(m·K), indicating a remarkable synergistic effect of BNNS and ND in improving thermal conductivity. It is noteworthy to state that the relative thermal conductivity ratio of the 3D‐BNNS/epoxy and 3D‐BNNS/ND/epoxy composites to pure epoxy resin was markedly higher at lower temperatures than the values measured at room temperature, signifying their superior heat transfer performance at lower temperatures. In addition, the composites depict excellent dielectric properties and lower coefficients of thermal expansion values. Finally, the 3D‐BNNS/ND/epoxy composites also have significantly improved Tg (132.5 and 152.6°C). The high‐performance polymer composites described in this study are envisaged for implementation within the realm of electronic packaging materials. [ABSTRACT FROM AUTHOR]

Published
2024
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36. A Preliminary Study on a New Epoxy Resin IR-3 for High-Field Superconducting Magnet Applications

Author

Yao, Huanli, primary, Zhao, Yalin, additional, Zhang, Hua, additional, Wang, Yingzhe, additional, Wang, Chengtao, additional, Zhang, Zhen, additional, Feng, Ze, additional, Shi, Jinrui, additional, Chen, Xin, additional, Zhou, Jin, additional, Li, Chunyan, additional, Wang, Juan, additional, Ning, Feipeng, additional, Huang, Rongjin, additional, and Xu, Qingjin, additional

Published
2022
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37. Assessing the impact of implementing multiple adherence measures to antiretroviral therapy from dispensing data: a short report.

Author

de Oliveira Costa, Juliana, Zhao, Yalin, Pearson, Sallie-Anne, and Schaffer, Andrea L.

Subjects
*PATIENT aftercare, *INTERNET, *HIGHLY active antiretroviral therapy, *HUMAN services programs, *PHARMACY databases, *DRUGS, *DESCRIPTIVE statistics, *RESEARCH funding, *PATIENT compliance, *LONGITUDINAL method
Abstract

Pharmacy dispensing data are useful for estimating adherence to therapy. Here, we implement multiple adherence measures to antiretroviral therapy (ART) and provide an online tool for visualising results. We conducted a cohort study for 2,042 people dispensed ART in Australia. We assessed adherence using the Proportion of Days Covered (PDC) within 360 days of follow-up as a continuous measure and dichotomised (PDC ≥80%). We defined a covered day as the 1) exposure to ≥3 antiretrovirals at the same time 2) exposure to any antiretroviral 3) lowest number of days covered per antiretroviral 4) average of days covered over all antiretrovirals 5) highest number of days covered per antiretroviral. For each method, we conducted sensitivity analyses. The median PDC ranged between 93.3%−98.3%. Between 67.0%−87.7% of individuals were classified as adherent, with higher values for measure 2 (85.5%−89.7%) and lower values for measure 3 (67.0%−70.9%). Censoring loss to follow-up had a higher impact on adherence estimates than considering a grace period. The variation in adherence estimates can be substantial, especially when dichotomising adherence. Researchers should consider operationalising multiple measures to estimate adherence bounds and identify a range of people at risk of non-adherence for targeted interventions. [ABSTRACT FROM AUTHOR]

Published
2023
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43. A position optimization strategy of the dynamic vibration absorber for the noise control of the power equipment

Author

Geng, Mingxin, Ma, Jiangang, Jing, Yan, Zhao, Yalin, Wang, Lv, Geng, Mingxin, Ma, Jiangang, Jing, Yan, Zhao, Yalin, and Wang, Lv

Abstract

Power equipment shows obvious low frequency line spectrum noise characteristics due to the power frequency. The effective noise control of the power equipment can be achieved by installing dynamic vibration absorbers (DVAs) on the structure surface of electrical equipment. However, if DVAs are not installed properly, considering the cases that they are installed at the vibration mode node position, the low radiation vibration mode and the redistribution of the integrate vibration power, the vibration and noise absorbing performances of DVAs may degrade. In order to achieve efficient vibration absorption and noise reduction on the power equipment, this paper proposes a low-frequency noise reduction technology for power equipment based on DVAs. The position optimization of the DAVs using in the power equipment is studied for the first time. Aimed at the single frequency radiated sound power of equipment, the integrate radiated sound power of the equipment is minimized through adjusting the position parameters of DVAs. A numerical case is studied to verify the effectiveness of the proposed DVAs position optimization. The results show that the noise control effect of the power equipment with the optimized DVAs is significantly improved. The method proposed in this paper solves the noise problem of the power equipment, which provides reference for power noise control.

Published
2022

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