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Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 411-426 doi: 10.1007/s11465-018-0467-0

Abstract: improving efficiency and grid-side power quality, an efficient SSTT optimized topology combining high-voltageIn view of the secondary pulsating existing in a single-phase system, the mathematical model of secondarypower transfer is built, and the mechanism of pulsating voltage resulting in beat frequency of LLC resonant

Keywords： solid-state traction transformer     high-voltage cascaded rectifier     LLC resonant converter     synchronous rotatingreference frame     carrier-interleaving phase shift control     secondary pulsating voltage     beat frequency    

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Experimental investigations on operating characteristics of a closed loop pulsating heat pipe

Yu WANG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 134-141 doi: 10.1007/s11708-015-0354-x

Abstract: The operating mechanism of the pulsating heat pipe (PHP) is not well understood and the present technology

Keywords： closed loop pulsating heat pipe     thermal performance     operation limit     thermography    

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A review of recent experimental investigations and theoretical analyses for pulsating heat pipes

Xin TANG, Lili SHA, Hua ZHANG, Yonglin JU

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 161-173 doi: 10.1007/s11708-013-0250-1

Abstract: Pulsating heat pipe (PHP), or oscillating heat pipe (OHP), a novel type of highly efficient heat transfer

Keywords： pulsating heat pipe (PHP)     flow visualization     nanofluids     nonlinear analysis    

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Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 386-393 doi: 10.1007/s11708-014-0323-9

Abstract: Accurate modeling and parameters of high voltage (HV) grid are critical for stability research of system

Keywords： high voltage (HV) grid     frequency stability parameter identification     primary frequency regulation (PFR    

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Recent advances toward high voltage, EC-free electrolytes for graphite-based Li-ion battery

Tong Zhang, Elie Paillard

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 577-591 doi: 10.1007/s11705-018-1758-z

Abstract: In the last years, many alternative electrolytes, aiming at allowing high voltage battery operation,Thus, we review here the high voltage, EC-free alternative electrolytes, focusing on those allowing the

Keywords： lithium-ion     electrolyte     solid electrolyte interphase     additives     high voltage     graphite    

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Mechanisms for simultaneous ozonation of sulfamethoxazole and natural organic matters in secondary effluent

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1368-0

Abstract:

• SMX was mainly degraded by hydrolysis, isoxazole oxidation and double-bond addition.

Keywords： Sulfamethoxazole     Ozonation     Natural organic matters     Secondary effluent     Degradation mechanism    

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Analysis and stabilization control of a voltage source controlled wind farm under weak grid conditions

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 943-955 doi: 10.1007/s11708-021-0793-5

Abstract: the wind turbines (WTs) are controlled by a new type of converter control strategy referred to as the voltage

Keywords： weak grids     voltage source (VS) control     wind turbine (WT)     stabilization control     wind farm     inertial    

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Development and advances in modular multilevel converter based HVDC projects in China

Frontiers of Engineering Management   Pages 183-189 doi: 10.1007/s42524-022-0248-7

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Keywords： high voltage direct current     power converter     power systems     renewable energy     ultra-high voltage    

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Physical and chemical processes of wintertime secondary nitrate aerosol formation

Qi YING

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 348-361 doi: 10.1007/s11783-011-0343-1

Abstract: include a process analysis (PA) scheme for gas and particulate matter (PM) to study the formation of secondarySecondary nitrate is formed in the urban areas from near the ground to a few hundred meters above theThe secondary nitrate formation rate in rural areas is lower due to lower NO .reactions with water vapor and the N O heterogeneous reactions with particle-bound water are important for secondaryreactions are most import near the surface to a few hundred meters above surface with a maximum modeled net secondary

Keywords： secondary nitrate aerosol     N2O5 heterogeneous reaction     process analysis    

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Two-echelon Emergency Response Problem and Simulation Considering Secondary Disasters

Han-peng Zhang,Yi Liao,Hui-xia Luo

Frontiers of Engineering Management 2014, Volume 1, Issue 3,   Pages 318-321 doi: 10.15302/J-FEM-2014042

Abstract: is necessary for subsequent resource distribution planning that get expected relief time considering secondarythis research is to develop a two-echelon emergency resource distribution model under condition of secondary

Keywords： simulation     secondary disasters     two-echelon vehicle routing model    

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Formation of secondary inorganic aerosol in a frigid urban atmosphere

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1452-0

Abstract:

•Harbin showed relatively high threshold RH (80%) for apparent increase of SOR.

Keywords： Haze     Sulfate     Nitrate     Heterogeneous chemistry     Biomass burning     Northeast China    

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PCDD/Fs emission, risk characterization, and reduction in China’s secondary copper production industry

Haiqian LI, Yonglong LU, Li LI

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 589-597 doi: 10.1007/s11783-013-0495-2

Abstract: Secondary copper production is one of the key polychlorinated dibenzo- -dioxins and dibenzofurans (PCDDIn 2004, when the Stockholm Convention entered into force in China, PCDD/Fs emissions from secondaryIn this paper, PCDD/Fs emission dynamics from secondary copper industry were discussed and cumulativeRiver Delta, Pearl River Delta and central regions were among the top three of dioxin emissions from secondaryFrom 2009 to 2015, the PCDD/Fs emission dynamics in the secondary copper industry were presented through

Keywords： polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs)     secondary copper production    

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Effects of different doses of cadmium on secondary metabolites and gene expression in Artemisia annua

Liangyun Zhou,Guang Yang,Haifeng Sun,Jinfu Tang,Jian Yang,Yizhan Wang,Thomas Avery Garran,Lanping Guo

Frontiers of Medicine 2017, Volume 11, Issue 1,   Pages 137-146 doi: 10.1007/s11684-016-0486-3

Abstract:

This study aims to elucidate the underlying molecular mechanisms of artemisinin accumulation induced by cadmium (Cd). The effects of different Cd concentrations (0, 20, 60, and 120 μmol/L) on the biosynthesis of Artemisia annua L. were examined. Intermediate and end products were quantified by HPLC-ESI-MS/MS analysis. The expression of key biosynthesis enzymes was also determined by qRT-PCR. The results showed that the application of treatment with 60 and 120 μmol/L Cd for 3 days significantly improved the biosynthesis of artemisinic acid, arteannuin B, and artemisinin. The concentrations of artemisinic acid, arteannuin B, and artemisinin in the 120 μmol/L Cd-treated group were 2.26, 102.08, and 33.63 times higher than those in the control group, respectively. The concentrations of arteannuin B and artemisinin in 60 μmol/L Cd-treated leaves were 61.10 and 26.40 times higher than those in the control group, respectively. The relative expression levels of HMGR, FPS, ADS, CYP71AV1, DBR2, ALDH1, and DXR were up-regulated in the 120 μmol/L Cd-treated group because of increased contents of artemisinic metabolites after 3 days of treatment. Hence, appropriate doses of Cd can increase the concentrations of artemisinic metabolites at a certain time point by up-regulating the relative expression levels of key enzyme genes involved in artemisinin biosynthesis.

Keywords： Cd     secondary metabolites     gene expressions     Artemisia annua L.    

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Cluster voltage control method for “Whole County” distributed photovoltaics based on improved differential

Frontiers in Energy   Pages 782-795 doi: 10.1007/s11708-023-0905-8

Abstract: However, the high penetration rate of DPVs has brought problems such as voltage violation and power qualityTo address the problems, this paper proposes a cluster voltage control method for distributed photovoltaicFirst, it partitions the distribution network into clusters, and different clusters exchange terminal voltageonly greatly improves the operational efficiency of the algorithm but also effectively controls the voltageof the distribution network, and maximizes the consumption capacity of DPVs based on qualified voltage

Keywords： distributed photovoltaics (DPVs)     cluster partitioning     improved differential evolution algorithm     voltage    

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Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 319-326 doi: 10.1007/s11783-014-0758-6

Abstract: In wastewater treatment plants (WWTPs), a secondary settler acts as a clarifier, sludge thickener, andSludge thickening occurs in the lower portions of secondary clarifiers during their operation.

Keywords： wastewater treatment plants     secondary settler     sludge thickening     sludge settling     hindered zone    

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Title Author Date Type Operation

Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Journal Article

Experimental investigations on operating characteristics of a closed loop pulsating heat pipe

Yu WANG

Journal Article

A review of recent experimental investigations and theoretical analyses for pulsating heat pipes

Xin TANG, Lili SHA, Hua ZHANG, Yonglin JU

Journal Article

Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

Journal Article

Recent advances toward high voltage, EC-free electrolytes for graphite-based Li-ion battery

Tong Zhang, Elie Paillard

Journal Article

Mechanisms for simultaneous ozonation of sulfamethoxazole and natural organic matters in secondary effluent

Journal Article

Analysis and stabilization control of a voltage source controlled wind farm under weak grid conditions

Journal Article

Development and advances in modular multilevel converter based HVDC projects in China

Journal Article

Physical and chemical processes of wintertime secondary nitrate aerosol formation

Qi YING

Journal Article

Two-echelon Emergency Response Problem and Simulation Considering Secondary Disasters

Han-peng Zhang,Yi Liao,Hui-xia Luo

Journal Article

Formation of secondary inorganic aerosol in a frigid urban atmosphere

Journal Article

PCDD/Fs emission, risk characterization, and reduction in China’s secondary copper production industry

Haiqian LI, Yonglong LU, Li LI

Journal Article

Effects of different doses of cadmium on secondary metabolites and gene expression in Artemisia annua

Liangyun Zhou,Guang Yang,Haifeng Sun,Jinfu Tang,Jian Yang,Yizhan Wang,Thomas Avery Garran,Lanping Guo

Journal Article

Cluster voltage control method for “Whole County” distributed photovoltaics based on improved differential

Journal Article

Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Journal Article