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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: On this basis, an integrated control strategy built upon synchronous rotating reference frame is presentedto achieve unified control over fundamental active, reactive and harmonic components.The carrier-interleaving phase shift modulation strategy is proposed to improve the harmonic performanceIn view of the secondary pulsating existing in a single-phase system, the mathematical model of secondarySimulation and experimental results have verified that the traction system and control scheme mentioned

Keywords： transformer     high-voltage cascaded rectifier     LLC resonant converter     synchronous rotating reference frame     carrier-interleavingphase shift control     secondary pulsating voltage     beat frequency    

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Coordinated shift control of nonsynchronizer transmission for electric vehicles based on dynamic tooth

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 887-900 doi: 10.1007/s11465-021-0653-3

Abstract: transmissions can enhance the dynamics and economic performance of electric vehicles (EVs), but the coordinated controlof the drive motor and gear shift mechanism during gear shifting is still a difficult challenge becauseTo improve the swiftness of gear shifting, this paper proposes a coordinated shift control method basedResults show that gear shifting duration and maximum jerk are reduced under the shift control with theproposed method, which proves the effectiveness of the proposed coordinated shift control method with

Keywords： electric vehicle     nonsynchronizer automated mechanical transmission (NSAMT)     planetary gear     coordinated shiftcontrol     dynamic tooth alignment    

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Modeling of Ce(IV) transport through a dispersion flat combined liquid membrane with carrier P507

Liang PEI,Liming WANG,Zhanying MA

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 503-509 doi: 10.1007/s11783-013-0540-1

Abstract: membrane (DFCLM) with contain 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester (P507) as the carrier, the system is considered to be in a transient state, and chemical reaction between Ce(IV) and the carrierThe diffusion coefficient of Ce(IV) in the membrane and the thickness of diffusion layer between feed phaseand membrane phase are obtained and the values are 6.31 × 10 m ·s and 31.2 μm, respectively.

Keywords： Dispersion flat combined liquid membrane (DFCLM)     dispersion phase     feed phase     2-ethyl hexyl phosphonic    

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SiO2 passivation layer grown by liquid phase deposition for silicon solar cell application

Yanlin CHEN,Sihua ZHONG,Miao TAN,Wenzhong SHEN

Frontiers in Energy 2017, Volume 11, Issue 1,   Pages 52-59 doi: 10.1007/s11708-016-0429-3

Abstract: In this paper, a comprehensive understanding of the SiO passivation layer grown by liquid phase depositionimportant roles in outstanding passivation effect of the LPD SiO film through analyzing the minority carrier

Keywords： Si solar cell     passivation     SiO2     liquid phase deposition     carrier lifetime    

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Energy distribution between liquid hydrogen and liquid oxygen temperatures in a Stirling/pulse tube refrigerator

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 516-526 doi: 10.1007/s11708-022-0844-6

Abstract: gas-coupled regenerative refrigerator, the energy flow distribution between the two stages, and optimal phaseThe effects of displacer displacement on the pressure wave, phase difference, acoustic power distribution, and inter-stage cooling capacity shift of the SPR have been investigated experimentally.

Keywords： Stirling/pulse tube refrigerator     displacer displacement     space application     phase shift     energy distribution    

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Studies on Precise Spacecraft Navigation and Positioning Using GPS

Xiang Kaiheng,Qu Guangji

Strategic Study of CAE 2004, Volume 6, Issue 1,   Pages 86-91

Abstract: generalized Kalman filtering technology are organically combined together, and an innovative solution— carrierphase & pseudorange integrated dynamic orbit determination (CPPIDOD) for low earth orbit spacecraftdynamically resolving of integer ambiguities and amendment of cycle slips in the application of GPS carrierphase have been solved.Based on all these, technique of carrier phase & pseudorange integrated dynamic differential relative

Keywords： spacecraft     navigation     GPS     carrier phase     Kalman filtering    

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Laboratory diagnosis for malaria in the elimination phase in China: efforts and challenges

Frontiers of Medicine 2022, Volume 16, Issue 1,   Pages 10-16 doi: 10.1007/s11684-021-0889-7

Abstract: This review summarizes the lessons about malaria diagnosis in the elimination phase, primarily includingthe establishments of laboratory networks and quality control in China, to better improve malaria diagnosis

Keywords： malaria     laboratory diagnosis     quality control     malaria elimination     China    

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A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range Article

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 3,   Pages 410-422 doi: 10.1631/FITEE.1600029

Abstract: This paper proposes a new variable-mode control strategy that is applicable for LLC resonant convertersThis control strategy incorporates advantages from full-bridge LLC resonant converters, half-bridge LLCresonant converters, variable-frequency control mode, and phase-shift control mode.When the input voltage rises to a certain level, it shifts to a full-bridge circuit and phase-shiftingcontrol mode (FB_PS mode).

Keywords： LLC     Full bridge     Half bridge     Variable frequency     Phase shift     Wide input voltage range    

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The impact of different voltage application modes on biodegradation of chloramphenicol and shift of microbial

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1576-x

Abstract:

● Presented coupled system enhanced biodegradation of antibiotic chloramphenicol.

Keywords： Electrical stimulation     Biodegradation     Microbial community     Chloramphenicol    

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Visible-light-driven heterostructured g-CN/Bi-TiO floating photocatalyst with enhanced charge carrier

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1417-3

Abstract:

• Bi doping in TiO2 enhanced the separation of photo-generated electron-hole.

Keywords： Bi doping     Visible light     Algal removal     Charge carrier separation    

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Enhanced activity of bimetallic Fe-Cu catalysts supported on ceria toward water gas shift reaction: synergistic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1962-1972 doi: 10.1007/s11705-023-2359-z

Abstract: Within the “hydrogen chain”, the high-temperature water gas shift reaction represents a key step to improveDespite the commercial application of the high-temperature water gas shift, novel catalysts characterizedthis work, we propose bimetallic iron-copper catalysts supported on ceria, characterized by low active phaseThe sample with iron/copper ≈ 1 and 4 wt % active phase content showed the best catalytic properties

Keywords： water gas shift     iron     copper     bimetallic catalysts     ceria     hydrogen    

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A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 119-128 doi: 10.1007/s11708-013-0288-0

Abstract: A novel and simple control algorithm using digital signal processor (DSP) has been proposed and realizedfor a three phase shunt active filter (SAF).This reduces the computational complexity and makes the control flexible and faster.MATLAB/SIMULINK while DSP TMS320LF2407 is employed in the digital implementation of hysteresis current control

Keywords： shunt active filter (SAF)     power quality     voltage source inverter (VSI)     digital signal processor (DSP)     total harmonic distortion (THD)     power factor improvement    

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Charge-carrier photogeneration and extraction dynamics of polymer solar cells probed by a transient photocurrent

Boa Jin, Hyunmin Park, Yang Liu, Leijing Liu, Jongdeok An, Wenjing Tian, Chan Im

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 164-179 doi: 10.1007/s11705-020-1976-z

Abstract: photogenerated charge carriers within polymer-based bulk-heterojunction-type solar cells, the charge-carriercarriers, the external quantum efficiencies as well as the extraction quantum efficiencies of the charge-carrierSubsequently, the charge-carrier concentration-dependent mobility values were obtained, and they arediscussed in consideration of the additional influences of the charge-carrier losses from the deviceduring the charge-carrier extraction that also affects the photocurrent-trace shape.

Keywords： charge-carrier photogeneration     transient photocurrent     polymer solar cells     charge-carrier extraction     space    

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Multi-objective genetic algorithms based structural optimization and experimental investigation of the planet carrier

Pengxing YI,Lijian DONG,Tielin SHI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4,   Pages 354-367 doi: 10.1007/s11465-014-0319-5

Abstract:

To improve the dynamic performance and reduce the weight of the planet carrier in wind turbine gearboxFirstly, the design points’ distribution for the design variables of the planet carrier is establishedAs well, this method is applied to design and optimize the planet carrier in a 1.5 MW wind turbine gearboxCompared with the original design, the mass and the stress of the optimized planet carrier are respectivelyConsequently, the cost of planet carrier is greatly reduced and its stability is also improved.

Keywords： planet carrier     multi-objective optimization     genetic algorithms     wind turbine gearbox     modal experiment    

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Effects of carrier-attached biofilm on oxygen transfer efficiency in a moving bed biofilm reactor

Yanling WEI,Xunfei YIN,Lu QI,Hongchen WANG,Yiwei GONG,Yaqian LUO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 569-577 doi: 10.1007/s11783-015-0822-x

Abstract: Three laboratory-scale moving bed biofilm reactors (MBBR) with different carrier filling ratios rangingfrom 40% to 60% were used to study the effects of carrier-attached biofilm on oxygen transfer efficiencyThese results were compared to αSOTE of wastewater with a clean carrier (no biofilm attached).conditions, αSOTE decreased by approximately 70% as compared to αSOTE of wastewater at a different carrier-fillingThis indicated that the biofilm attached to the carrier had a negative effect on αSOTE.

Keywords： carrier     biofilm     oxygen transfer efficiency     moving bed biofilm reactor    

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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

Coordinated shift control of nonsynchronizer transmission for electric vehicles based on dynamic tooth

Journal Article

Modeling of Ce(IV) transport through a dispersion flat combined liquid membrane with carrier P507

Liang PEI,Liming WANG,Zhanying MA

Journal Article

SiO2 passivation layer grown by liquid phase deposition for silicon solar cell application

Yanlin CHEN,Sihua ZHONG,Miao TAN,Wenzhong SHEN

Journal Article

Energy distribution between liquid hydrogen and liquid oxygen temperatures in a Stirling/pulse tube refrigerator

Journal Article

Studies on Precise Spacecraft Navigation and Positioning Using GPS

Xiang Kaiheng,Qu Guangji

Journal Article

Laboratory diagnosis for malaria in the elimination phase in China: efforts and challenges

Journal Article

A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

Journal Article

The impact of different voltage application modes on biodegradation of chloramphenicol and shift of microbial

Journal Article

Visible-light-driven heterostructured g-CN/Bi-TiO floating photocatalyst with enhanced charge carrier

Journal Article

Enhanced activity of bimetallic Fe-Cu catalysts supported on ceria toward water gas shift reaction: synergistic

Journal Article

A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

Journal Article

Charge-carrier photogeneration and extraction dynamics of polymer solar cells probed by a transient photocurrent

Boa Jin, Hyunmin Park, Yang Liu, Leijing Liu, Jongdeok An, Wenjing Tian, Chan Im

Journal Article

Multi-objective genetic algorithms based structural optimization and experimental investigation of the planet carrier

Pengxing YI,Lijian DONG,Tielin SHI

Journal Article

Effects of carrier-attached biofilm on oxygen transfer efficiency in a moving bed biofilm reactor

Yanling WEI,Xunfei YIN,Lu QI,Hongchen WANG,Yiwei GONG,Yaqian LUO

Journal Article