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Power Quality Warning of High-Speed Rail Based on Multi-Features Similarity
Jingjing Bai,Wei Gu,Xiaodong Yuan,Qun Li,Bing Chen,Xuchong Wang 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.1
As one type of power quality (PQ) disturbance sources, high-speed rail (HSR) can have major impacts on the power supply grid. Providing timely and accurate warning information for PQ problems of HSR is important for the safe and stable operation of traction power supply systems and the power supply grid. This study proposes a novel warning approach to identify PQ problems and provide warning prompts based on the monitored data of HSR. To embody the displacement and status change of monitored data, multi-features of different sliding windows are computed. To reflect the relative importance degree of these features in the overall evaluation, an analytic hierarchy process (AHP) is used to analyse the weights of multi-features. Finally, a multi-features similarity algorithm is applied to analyse the difference between monitored data and the reference data of HSR, and PQ warning results based on dynamic thresholds can be analysed to quantify its severity. Cases studies demonstrate that the proposed approach is effective and feasible, and it has now been applied to an actual PQ monitoring platform.
Power Quality Warning of High-Speed Rail Based on Multi-Features Similarity
Bai, Jingjing,Gu, Wei,Yuan, Xiaodong,Li, Qun,Chen, Bing,Wang, Xuchong The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.1
As one type of power quality (PQ) disturbance sources, high-speed rail (HSR) can have major impacts on the power supply grid. Providing timely and accurate warning information for PQ problems of HSR is important for the safe and stable operation of traction power supply systems and the power supply grid. This study proposes a novel warning approach to identify PQ problems and provide warning prompts based on the monitored data of HSR. To embody the displacement and status change of monitored data, multi-features of different sliding windows are computed. To reflect the relative importance degree of these features in the overall evaluation, an analytic hierarchy process (AHP) is used to analyse the weights of multi-features. Finally, a multi-features similarity algorithm is applied to analyse the difference between monitored data and the reference data of HSR, and PQ warning results based on dynamic thresholds can be analysed to quantify its severity. Cases studies demonstrate that the proposed approach is effective and feasible, and it has now been applied to an actual PQ monitoring platform.
Liu Rui,Gu Qian-Qun,Zhu Wei-Ming,Cui Cheng-Bin,Fan Guo-Tao The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.9
Two known modified dipeptides, trichodermamide A (1) and aspergillazine A (2), were isolated from an ethyl acetate extract of the metabolite of a marine-derived fungus Spicaria elegans, and were found to have a weak cytotoxic effect on three cancer cell lines P388, A-549, and HL-60 agreed. To our knowledge, this is the first report on the isolation of compounds 1 and 2 from the fungus Spicaria elegans and their cytotoxic effect.
Rui Liu,Qian-Qun Gu,Wei-Ming Zhu,Cheng-Bin Cui,Guo-Tao Fan 대한약학회 2005 Archives of Pharmacal Research Vol.28 No.9
Two known modified dipeptides, trichodermamide A (1) and aspergillazine A (2), were isolated from an ethyl acetate extract of the metabolite of a marine-derived fungus Spicaria elegans, and were found to have a weak cytotoxic effect on three cancer cell lines P388, A-549, and HL-60 agreed. To our knowledge, this is the first report on the isolation of compounds 1 and 2 from the fungus Spicaria elegans and their cytotoxic effect.
Liu, Rui,Cui, Cheng-Bin,Duan, Lin,Gu, Qian-Qun,Zhu, Wei-Ming The Pharmaceutical Society of Korea 2005 Archives of Pharmacal Research Vol.28 No.12
Bioassay-guided fractionation of $CHCl_{3}$ extract from the fermentation broth of a sponge Mycale plumose-derived actinomycete Saccharopolyspora sp. nov., led to the isolation of two known prodigiosin analogs - metacycloprodigiosin (1) and undecylprodigiosin (2). These compounds exhibited significant cytotoxic activities against five cancer cell lines: P388, HL60, A-549, BEL7402, and SPCA4. This is the first report on the significant cytotoxicity of metacycloprodigiosin (1) against human cancer cell lines.
Hong Ren,Rui Liu,Li Chen,Tianjiao Zhu,Wei Ming Zhu,Qian Qun Gu 대한약학회 2010 Archives of Pharmacal Research Vol.33 No.4
Two new hetero-spirocyclic γ-lactams, azaspirofurans A (1) and B (2), had been isolated from a marine sediment-derived fungus Aspergillus sydowi D2-6. Their structures were determined by the chemical evidence and spectral analyses. Compound 1 exhibited cytotoxicity against A549 cell line with the IC50 value of 10 μM by MTT method.
Rui Liu,Cheng-Bin Cui,Lin Duan,Qian-Qun Gu,Wei-Ming Zhu 대한약학회 2005 Archives of Pharmacal Research Vol.28 No.12
Bioassay-guided fractionation of CHCl3 extract from the fermentation broth of a sponge Mycale plumose-derived actinomycete Saccharopolyspora sp. nov., led to the isolation of two known prodigiosin analogs - metacycloprodigiosin (1) and undecylprodigiosin (2). These compounds exhibited significant cytotoxic activities against five cancer cell lines: P388, HL60, A-549, BEL- 7402, and SPCA4. This is the first report on the significant cytotoxicity of metacycloprodigiosin (1) against human cancer cell lines.
Li, De-Hai,Zhu, Tian-Jiao,Liu, Hong-Bing,Fang, Yu-Chun,Gu, Qian-Qun,Zhu, Wei-Ming The Pharmaceutical Society of Korea 2006 Archives of Pharmacal Research Vol.29 No.8
Four known butenolides were isolated from the ethyl acetate extracts of the culture broth of the marine-derived bacterium, Streptoverticillium luteoverticillatum, by bioassay-guided fractionation. The structures were identified on the basis of spectral data. The absolute configuration of compound (1) was determined by CD spectrum for the first time. Compounds 1-4 showed in vitro cytotoxicity against the murine lymphoma P388 and human leukemia K562 cell lines. This is the first report on the isolation of butenolides from the marine bacterium, Streptoverticillium luteoverticillatum, and their cytotoxic activities.
Xin, Zhi-Hong,Tian, Li,Zhu, Tian-Jiao,Wang, Wen-Liang,Du, Lin,Fang, Yu-Chun,Gu, Qian-Qun,Zhu, Wei-Ming 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.7
Two isocoumarin derivatives, stoloniferol A (1) and B (2), a known $5{\alpha}$, $8{\alpha}-epidioxy-23-methyl-(22E, 24R)-ergosta-6$, $22-dien-3{\beta}-ol$ (3), and a known dihydrocitrinone (4) were isolated from the ethyl acetate extract of the sea squirt-derived fungus, Penicillium stoloniferum QY2-10, and a halophilic fungus, Penicillium notatum B-52, respectively. Their structures were elucidated by spectroscopic methods and optical rotation. The stereochemistry of 2 was determined on the basis of different NOE experiments and chemical transformation. Compound 3 showed cytotoxicity against P388 cells, with an $IC_{50}$ value of 4.07 ${\mu}M$.