http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Dongliang Qiu (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Novel Method for Circulating Current Suppression in MMCs Based on Multiple Quasi-PR Controller
Qiu, Jian,Hang, Lijun,Liu, Dongliang,Geng, Shengbao,Ma, Xiaonan,Li, Zhen The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.6
An improved circulating current suppression control method is proposed in this paper. In the proposed controller, an outer loop of the average capacitor voltage control model is used to balance the sub-module capacitor voltage. Meanwhile, an individual voltage balance controller and an arm voltage balance controller are also used. The DC and harmonic components of the circulating current are separated using a low pass filter. Therefore, a multiple quasi-proportional-resonant (multi-quasi-PR) controller is introduced in the inner loop to eliminate the circulating harmonic current, which mainly contains second-order harmonic but also contains other high-order harmonics. In addition, the parameters of the multi-quasi-PR controller are designed in the discrete domain and an analysis of the stability characteristic is given in this paper. In addition, a simulation model of a three-phase MMC system is built in order to confirm the correctness and superiority of the proposed controller. Finally, experiment results are presented and compared. These results illustrate that the improved control method has good performance in suppressing circulating harmonic current and in balancing the capacitor voltage.
-
Novel Method for Circulating Current Suppression in MMCs Based on Multiple Quasi-PR Controller
Jian Qiu,Lijun Hang,Dongliang Liu,Shengbao Geng,Xiaonan Ma,Zhen Li 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.6
An improved circulating current suppression control method is proposed in this paper. In the proposed controller, an outer loop of the average capacitor voltage control model is used to balance the sub-module capacitor voltage. Meanwhile, an individual voltage balance controller and an arm voltage balance controller are also used. The DC and harmonic components of the circulating current are separated using a low pass filter. Therefore, a multiple quasi-proportional-resonant (multi-quasi-PR) controller is introduced in the inner loop to eliminate the circulating harmonic current, which mainly contains second-order harmonic but also contains other high-order harmonics. In addition, the parameters of the multi-quasi-PR controller are designed in the discrete domain and an analysis of the stability characteristic is given in this paper. In addition, a simulation model of a three-phase MMC system is built in order to confirm the correctness and superiority of the proposed controller. Finally, experiment results are presented and compared. These results illustrate that the improved control method has good performance in suppressing circulating harmonic current and in balancing the capacitor voltage.
-
Tao Liang,Xuxiao Ye,Yuanyuan Liu,Xinkai Qiu,Zuowei Li,Binqiang Tian,Dongliang Yan 생화학분자생물학회 2018 Experimental and molecular medicine Vol.50 No.-
FAM46B is a member of the family with sequence similarity 46. Little is known about the expression and functional role (s) of FAM46B in prostate cancer (PC). In this study, the expression of FAM46B expression in The Cancer Genome Atlas, GSE55945, and an independent hospital database was measured by bioinformatics and real-time PCR analysis. After PC cells were transfected with siRNA or a recombinant vector in the absence or presence of a β-catenin signaling inhibitor (XAV-939), the expression levels of FAM46B, C-myc, Cyclin D1, and β-catenin were measured by western blot and realtime PCR. Cell cycle progression and cell proliferation were measured by flow cytometry and the CCK-8 assay. The effects of FAM46B on tumor growth and protein expression in nude mice with PC tumor xenografts were also measured. Our results showed that FAM46B was downregulated but that β-catenin was upregulated in patients with PC. FAM46B silencing promoted cell proliferation and cell cycle progression in PC, which were abrogated by XAV-939. Moreover, FAM46B overexpression inhibited PC cell cycle progression and cell proliferation in vitro and tumor growth in vivo. FAM46B silencing promoted β-catenin protein expression through the inhibition of β-catenin ubiquitination. Our data clearly show that FAM46B inhibits cell proliferation and cell cycle progression in PC through ubiquitination of β-catenin.
-
Muhammad Irshad,Bizhu He,Shuang Liu,Sangeeta Mitra,Biswojit Debnath,Min Li,Hafiz Muhammad Rizwan,Dongliang Qiu 한국원예학회 2017 Horticulture, Environment, and Biotechnology Vol.58 No.5
Okra (Abelmoschus esculentus L.) belongs to the Malvaceae family and is a difficult species to manipulateand regenerate in vitro. In this study, factors that influence secretion of phenolic compounds, callus induction, andsubsequent regeneration in okra were optimized. Different concentrations of anti-browning additives, such as activatedcharcoal (AC) and citric acid (CA) were tested alone or in combination with ascorbic acid (AA) in MS medium toevaluate their ability to control phenolic secretion from hypocotyl and cotyledon explants. Among the anti-browningadditives, 200 mg・L-1AC and 10 mg・L-1CA +AA (1:1) were best at controlling phenolic secretion from hypocotyland cotyledon explants in callus induction medium. Hypocotyl explants were more suitable for callus initiation andorganogenesis than cotyledon explants. Moreover, among twelve types of media tested for callus culture, the additionof 0.5 mg・L-12,4-dicholorophenoxy acetic acid (2,4-D) and 1.5 mg・L-1benzyladenine (BA) to the growth media wasthe most effective for hypocotyl explants, whereas MS + 1.5 mg・L-1α-naphthylacetic acid (NAA) and 0.5 mg・L-16-benzyloaminopurine (BAP) was effective for cotyledon explants. Improved shoot regeneration was achieved with 2mg・L-1BAP and 0.1 mg・L-1indole butyric acid (IBA). The maximum number of strong and healthy roots wasobtained on media that included 2 mg・L-1IBA and 200 mg・L-1AC. Rooted plantlets were successfully acclimatizedin earthen pots, and the rooted plantlets had normal morphology and growth characteristics. The present study offersa potential solution for controlling phenolic secretion during okra regeneration using additives and evaluates themanipulation of plant growth regulators for effective regeneration of the Wufu okra cultivar.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
