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Simulation Research on Control System of Main Converter Unit
Li Xingyu,Zheng Zhongxiang,Wu Dali 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
The main converter unit needs to provide high-quality AC and DC power for the ship AC/DC hybrid power system. The reliability of its control system is very important. In order to study and optimize the control system of the converter unit, it is very meaningful to model and simulate it. The working characteristics and operation requirements of the converter unit in the ship hybrid power system are introduced. According to the control system structure, the corresponding simulation model is built. The simulation results meet the unit operation requirements and provide technical support for optimizing the converter unit control system.
Xiaojiao Sima,Bo Jiang,Jia Fang,Yongqin He,Zhongxiang Fang,Saravana Kumar KM,Wei Ren,Lingling Qiu,Xiaomin Chen,Bingsong Zheng 한국식물생명공학회 2015 Plant biotechnology reports Vol.9 No.3
MicroRNAs (miRNAs) play a vital role in plant development and growth through negative regulation of post-transcriptional gene expression. Carya cathayensis (hickory) is an important species for dried nuts and oil in China, with high nutritional and economic value. The graft technique is an important strategy for hickory cultivation. To understand the role of miRNAs involved in the hickory graft process, we constructed three small ribonucleic acid (RNA) libraries from hickory rootstock (2 years old) and scion (1 year old) at 0, 7, and 14 days post-graft. Sequence analysis of the three libraries identified 21 conserved miRNAs belonging to 13 families, and 10 novel and 8 potentially novel miRNAs belonging to 15 families. Among these miRNAs, 12 miRNAs were differentially expressed during the graft process in hickory and twothirds were downregulated. Quantitative real-time polymerase chain reaction validated that 14 miRNAs and their expression trends were similar to the results obtained by Solexa sequencing. Further, a total of 89 target genes for conserved and 26 target genes for novel miRNAs were predicted. This study will help in understanding the roles and regulatory modes of miRNAs involvement in the hickory graft process.