6,956 research outputs found

    LC150+, un entretien avec Rene Tan, Jonathan Quek, Ian Soon, Keefe Chooi and Jannelle Ho

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    [ES] Entrevista[FR] Entretien[EN] InterviewLapunzina, A. (2023). LC150+, a conversation with Rene Tan, Jonathan Quek, Ian Soon, Keefe Chooi and Jannelle Ho. LC. Revue de recherches sur Le Corbusier. (7):161-176. https://doi.org/10.4995/lc.2023.19349OJS161176

    LC compensators for power factor correction of nonlinear loads

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    This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. Copyright @ 2004 IEEEA method is presented for finding the optimum fixed LC compensator for power factor correction of nonlinear loads where both source voltage and load current harmonics are present. The LC combination is selected because pure capacitive capacitors alone would not sufficiently correct the power factor. Optimization minimizes the transmission loss, maximizes the power factor, and maximizes the efficiency. The performance of the obtained compensator is discussed by means of numerical examples

    LC compensators based on transmission loss minimization for nonlinear loads

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    This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. Copyright @ 2004 IEEEThis paper presents a method employing the penalty function search algorithm to determine the LC compensator value for the optimal power factor correction in nonsinusoidal systems. The objective of the proposed method is to minimize the transmission loss while the power factor and efficiency are taken as constraints and utilized in order to solve the multiobjective optimization problem by transforming it into a single objective one. Examples show that the load nonlinearity can have a significant impact on optimal compensator sizes

    Effects of HO-1 overexpression on mitochondrial dysfunction and autophagy level in Lv-HO-1-H9c2 cells with H/R model.

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    (A) Cell viability was measured using the CCK-8 assay. The data are presented as means ± SE (N = 5). **p<0.01 vs corresponding Normoxia group; #p<0.05, vs corresponding Lv-scramble group. (B) Real-time quantitative PCR (RT q-PCR) analyses of HO-1 mRNA expression in lv-HO-1 H9c2 cells subjected to H/R relative to GAPDH expression (n = 3 wells per group). **p<0.01 vs. the normoxia group. (C) H/R-induced HO-1, p62, and LC-3 protein expression analyzed using western blots of lv-HO-1 H9c2 cells. GAPDH was used as a loading control (n = 3 wells per group). ##p<0.01 vs corresponding Lv-scramble group; ***p<0.001 vs. the corresponding normoxia group. (D) Representative confocal microscopy images and quantitative analysis of autophagosomes from 15 fields (n = 3 hearts per group). Scale bar = 500 nm. *p<0.05 vs. the corresponding normoxia group; ##p<0.01, vs corresponding Lv-scramble group. H/R, Hypoxia/reoxygenation; HO-1, heme oxygenase-1. (E,F) Flow cytometry detection of changes in JC-1 fluorescence color reflects changes in the mitochondrial membrane potential and mitochondrial ROS levels. #p<0.05, vs corresponding Lv-scramble group; **p<0.01 vs corresponding Normoxia group, #p<0.05, vs corresponding Lv-scramble group. (G) The apoptosis rate of the four groups. Cell identification and detection of apoptosis. **p<0.01 vs corresponding Normoxia group; ##p<0.01, vs corresponding Lv-scramble group.</p
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