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Your search keyword '"Zhang, Jingyang"' showing total 331 results
Start Over Author "Zhang, Jingyang" Publication Type Academic Journals
331 results on '"Zhang, Jingyang"'

3. Oxidation-induced superelasticity in metallic glass nanotubes

Author

Li, Fucheng, Zhang, Zhibo, Liu, Huanrong, Zhu, Wenqing, Wang, Tianyu, Park, Minhyuk, Zhang, Jingyang, Bönninghoff, Niklas, Feng, Xiaobin, Zhang, Hongti, Luan, Junhua, Wang, Jianguo, Liu, Xiaodi, Chang, Tinghao, Chu, Jinn P., Lu, Yang, Liu, Yanhui, Guan, Pengfei, and Yang, Yong

Published
2024
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18. Log specification and intelligent analysis method based on oil and gas pipeline SCADA system

Author

Sun Lingyi, Li Yafeng, Zhang Jingyang, Yang Jingli, Mao Bingqiang, Deng Zhonghua, and Wang Wei

Subjects
adaboost algorithm, scada system, mapreduce, intelligent analysis, fault diagnosis, 00a73, Mathematics, QA1-939
Abstract

As the control center of the natural gas long-distance pipeline network, the SCADA system shoulders the important tasks of data collection and monitoring of the whole long-distance pipeline, gas transmission management, production scheduling, operation and maintenance coordination in production, and plays a very important role in the whole oil and gas pipeline. In this paper, firstly, the SCADA system for localized long-distance pipelines is explained in detail, including its basic structure and special solutions to problems. Secondly, the AdaBoost algorithm, which combines the MapReduce parallel computing framework, is introduced to collect and process data from the operation logs of the SCADA system and normalize the logs. Finally, to test the interaction between the improved AdaBoost algorithm and the SCADA system, a system test was conducted. The results show that the average latency of scheduling the logs of the SCADA system by AdaBoost algorithm with MapReduce parallel computing framework is only 39.82ms, the average processing speed of the log normalization file data under the multi-threaded mode of the system reaches 86.51GB/s, and the effective accuracy of the fault diagnosis is as high as 90.36%. This shows that the oil and gas pipeline SCADA system interacting with data visualization technology can process operation logs more quickly and can carry out real-time intelligent supervision of the working status and operation parameters of the whole auxiliary system, promoting the intelligent development of the oil and gas pipeline SCADA system.

Published
2024
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27. Brief Report: Phase IIa Safety Study of a Vaginal Ring Containing Dapivirine in Adolescent Young Women.

Author

Bunge, Katherine E, Levy, Lisa, Szydlo, Daniel W, Zhang, Jingyang, Gaur, Aditya H, Reirden, Daniel, Mayer, Kenneth H, Futterman, Donna, Hoesley, Craig, Hillier, Sharon L, Marzinke, Mark A, Hendrix, Craig W, Gorbach, Pamina M, Wilson, Craig M, Soto-Torres, Lydia, Kapogiannis, Bill, Nel, Annalene, Squires, Kathleen E, and MTN-023/IPM 030 Study Team

Subjects
MTN-023/IPM 030 Study Team, Vagina, Plasma, Humans, HIV Infections, Pyrimidines, Placebos, Anti-HIV Agents, Double-Blind Method, Contraceptive Devices, Female, Dose-Response Relationship, Drug, Adolescent, Adult, United States, Female, Young Adult, Self Report, Clinical Trials and Supportive Activities, Prevention, Patient Safety, Clinical Research, Topical Microbicides, 6.1 Pharmaceuticals, Evaluation of treatments and therapeutic interventions, HIV-1 prevention, adolescents, microbicides, Clinical Sciences, Public Health and Health Services, Virology
Abstract

BackgroundYoung women aged 15-24 years are disproportionately affected by the HIV epidemic. Two phase III trials of a vaginal ring containing 25-mg dapivirine demonstrated HIV-1 risk reduction in adult women older than 21 years but not in those aged 18-21 years. Lack of protection was correlated with low adherence.MethodsIn this phase-IIa, randomized, double-blind, placebo-controlled, US, multicenter trial of the dapivirine ring in sexually active females, aged 15-17 years, participants were randomized 3:1 to a dapivirine or placebo ring to be inserted monthly for 6 months (NCT02028338). Primary safety end points included grade 2 product related adverse events and any grade 3 and higher adverse events. Adherence to ring use was assessed by plasma dapivirine concentrations, residual levels in used rings, and self-report. A plasma dapivirine concentration of >95 pg/mL was used to define short-term adherence; a residual ring level of

Published
2020

43. Copper‐Catalyzed Dearomative 1,2‐Hydroamination.

Author

Davis, Christopher W., Zhang, Yu, Li, Yanrong, Martinelli, Matteo, Zhang, Jingyang, Ungarean, Chad, Galer, Petra, Liu, Peng, and Sarlah, David

Abstract

Catalytic olefin hydroamination reactions are some of the most atom‐economical transformations that bridge readily available starting materials–olefins and high‐value‐added amines. Despite significant advances in this field over the last two decades, the formal hydroamination of nonactivated aromatic compounds remains an unsolved challenge. Herein, we report the extension of olefin hydroamination to aromatic π‐systems by using arenophile‐mediated dearomatization and Cu‐catalysis to perform 1,2‐hydroamination on nonactivated arenes. This strategy was applied to a variety of substituted arenes and heteroarenes to provide general access to structurally complex amines. We conducted DFT calculations to inform mechanistic understanding and rationalize unexpected selectivity trends. Furthermore, we developed a practical, scalable desymmetrization to deliver enantioenriched dearomatized products and enable downstream synthetic applications. We ultimately used this dearomative strategy to efficiently synthesize a collection of densely functionalized small molecules. [ABSTRACT FROM AUTHOR]

Published
2024
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