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188 results on '"Zhao, Wen Yuan"'

4. Phosphorus-Doping Enables the Superior Durability of a Palladium Electrocatalyst towards Alkaline Oxygen Reduction Reactions.

Author

Zhao, Wen-Yuan, Chen, Miao-Ying, Wu, Hao-Ran, Li, Wei-Dong, and Lu, Bang-An

Subjects
*OXYGEN reduction, *ALKALINE fuel cells, *PALLADIUM, *DURABILITY, *METAL-base fuel
Abstract

The sluggish kinetics of oxygen reduction reactions (ORRs) require considerable Pd in the cathode, hindering the widespread of alkaline fuel cells (AFCs). By alloying Pd with transition metals, the oxygen reduction reaction's catalytic properties can be substantially enhanced. Nevertheless, the utilization of Pd-transition metal alloys in fuel cells is significantly constrained by their inadequate long-term durability due to the propensity of transition metals to leach. In this study, a nonmetallic doping strategy was devised and implemented to produce a Pd catalyst doped with P that exhibited exceptional durability towards ORRs. Pd3P0.95 with an average size of 6.41 nm was synthesized by the heat-treatment phosphorization of Pd nanoparticles followed by acid etching. After P-doping, the size of the Pd nanoparticles increased from 5.37 nm to 6.41 nm, and the initial mass activity (MA) of Pd3P0.95/NC reached 0.175 A mgPd−1 at 0.9 V, slightly lower than that of Pd/C. However, after 40,000 cycles of accelerated durability testing, instead of decreasing, the MA of Pd3P0.95/NC increased by 6.3% while the MA loss of Pd/C was 38.3%. The durability was primarily ascribed to the electronic structure effect and the aggregation resistance of the Pd nanoparticles. This research also establishes a foundation for the development of Pd-based ORR catalysts and offers a direction for the future advancement of catalysts designed for practical applications in AFCs. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Adjuvant Corticosteroids With Surgery for Chronic Subdural Hematoma: A Systematic Review and Meta-Analysis

Author

Shi, Min, Xiao, Ling-fei, Zhang, Ting-bao, Tang, Qing-wen, and Zhao, Wen-yuan

Subjects
recurrence, chronic subdural hematoma, General Neuroscience, adjuvant treatment, Neurosciences. Biological psychiatry. Neuropsychiatry, Systematic Review, poor outcome, mortality, RC321-571, Neuroscience, corticosteroids
Abstract

The use of adjuvant corticosteroids with surgery for chronic subdural hematoma (CSDH) has received considerable attention in recent years. However, there is no conclusive evidence regarding its effectiveness and safety for CSDH. Therefore, we performed a meta-analysis and systematic review to evaluate the effectiveness and safety of corticosteroids as an adjuvant treatment for the treatment of CSDH. We comprehensively searched electronic databases (PubMed, EMBASE, Cochrane Library, and Web of Science) to identify relevant trials that investigated the efficacy and safety of adjuvant corticosteroids with surgery for CSDH, published from inception until May 2021. Outcome measures included recurrence rate, all-cause mortality, good functional outcome, length of hospitalization, and adverse events. We used the Cochrane risk of bias method to evaluate the quality of randomized controlled trials (RCTs), and the Newcastle Ottawa Scale to evaluate the quality of observational studies. We included nine studies, consisting of three RCTs and six observational studies, that compared corticosteroids as an adjuvant treatment to surgery with surgery alone. Pooled results revealed that the risk of recurrence was significantly reduced in patients who received adjuvant corticosteroids with surgery compared to those who underwent surgery alone (relative risk [RR] = 0.52, 95% confidence interval [CI] = 0.39–0.69, p < 0.00001). However, no statistically significant difference was observed between these groups in all-cause mortality (RR = 0.91, 95% CI = 0.37–2.23, p = 0.83), good functional outcome (RR = 1.03, 95% CI = 0.96–1.10, p = 0.47), length of hospitalization (MD = 0.35, 95% CI = –2.23 to 1.67, p = 0.83), and infection rates (RR = 0.99, 95% CI = 0.64–1.53, p = 0.95). Adjuvant corticosteroids with surgery reduce the risk of recurrence of CDSH, but do not improve the all-cause mortality or functional outcome, as compared to surgery alone. These findings support the use of adjuvant corticosteroids with surgery for CSDH patients. Further high-quality RCTs are required to confirm the efficacy and safety of adjuvant corticosteroids in the treatment of CSDH patients.

Published
2021

33. 掺铪氧化锌红外透明导电薄膜

Author

Zhao Wen-yuan, Zheng Chuantao, Bi Ran, Zhang Mengyao, and Wang Yiding

Subjects
Materials science, Infrared, business.industry, Doping, Optoelectronics, business, Electrical conductor, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2021

34. Infrared Indium Oxide Hf-doped Transparent Conductive Films

Author

Han Feng-bo, Zhao Wen-yuan, Bi Ran, LI Ya-dan, Zheng Chuantao, Tian Feng, and Wang Yiding

Subjects
chemistry.chemical_compound, Materials science, chemistry, business.industry, Infrared, Doping, Oxide, Optoelectronics, chemistry.chemical_element, business, Electrical conductor, Atomic and Molecular Physics, and Optics, Indium
Published
2020

41. Notice of Retraction: The Detection of Power Quality Hybrid Disturbance Based on S Transform

Author

Zhao Wen-yuan

Subjects
Engineering, Switched-mode power supply, business.industry, Electrical engineering, Hardware_PERFORMANCEANDRELIABILITY, Power factor, Voltage optimisation, Power (physics), Disturbance voltage, Electric power system, Voltage sag, Hardware_INTEGRATEDCIRCUITS, Voltage regulation, business
Abstract

According more and more application by power electronic devices, a substantial increase in the variety loads as impact loads, nonlinear loads and fluctuation loads, which make change of power quality of power grid voltage, like the voltage swell, voltage sag, voltage fluctuation and flicker, voltage waveform deviation. Because of power quality problem mostly occur several types' disturbance, so the article aims the hybrid disturbance of power quality and use the method of S Transform to analyse, in order to provide a suggestion of count the data of power quality by power grid department.

Published
2010

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