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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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CC@BCN@PANI core-shell nanoarrays as ultra-high cycle stability cathode for Zn-ion hybrid supercapacitors

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 555-566 doi: 10.1007/s11708-023-0882-8

Abstract: Exploring cathode materials that combine excellent cycling stability and high energy density poses aboron-carbon-nitrogen (BCN) nanoarray on carbon cloth surface is prepared as advanced cathode materials via simple high-temperaturePANI-based ZHSCs exhibit superior electrochemical performances showing a specific capacity of 145.8 mAh/g, a high

Keywords： CC@BCN@PANI cathode     Zn-ion hybrid supercapacitor     core-shell nanoarrays     high energy density     ultra-high    

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Behavior and strength of headed stud shear connectors in ultra-high performance concrete of composite

Jianan QI, Yuqing HU, Jingquan WANG, Wenchao LI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1138-1149 doi: 10.1007/s11709-019-0542-6

Abstract: experimental and numerical investigation on the static behavior of headed stud shear connectors in ultra-highobserved on the concrete slab, indicating that UHPC slab exhibited good performance and could resist the high

Keywords： ultra-high performance concrete     studs     shear strength     FE analysis     push-out test    

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Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 704-721 doi: 10.1007/s11709-023-0941-6

Abstract: this study, the flexural and longitudinal shear performances of two types of precast lightweight steel–ultra-high

Keywords： precast steel–UHPC composite beam     flexural performance     longitudinal shear performance     parametric study     transverse reinforcement ratio    

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Key Technologies in the Design and Construction of 300 m Ultra-High Arch Dams

Renkun Wang

Engineering 2016, Volume 2, Issue 3,   Pages 350-359 doi: 10.1016/J.ENG.2016.03.012

Abstract:

Starting with the Ertan arch dam (240 m high, 3300 MW) in 2000, China successfully built a total ofseven ultra-high arch dams over 200 m tall by the end of 2014.The design and construction of these 300 m ultra-high arch dams posed significant challenges, due tohigh water pressures, high seismic design criteria, and complex geological conditions.m ultra-high arch dams, including the strength and stability of foundation rock, excavation of the dam

Keywords： Ultra-high arch dam     Shape optimization     Arch dam overall safety     Seismic safety     Concrete temperature control    

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Steel Fiber–Matrix Interfacial Bond in Ultra-High Performance Concrete: A Review Review

Yulin Deng,Zuhua Zhang,Caijun Shi,Zemei Wu,Chaohui Zhang

Engineering 2023, Volume 22, Issue 3,   Pages 215-232 doi: 10.1016/j.eng.2021.11.019

Abstract:

Ultra-high performance concrete (UHPC) is a relatively new cementitious concrete composite with significant

Keywords： Ultra-high performance concrete     Interfacial bond     Steel fiber     Pullout behavior    

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Studying the New Strength-toughen Mechanisms,Developing a New Field of Ultra-high Steel

Zhao Zhenye,Li Zhi,Liu Tianqi,Zhu Jieyuan

Strategic Study of CAE 2003, Volume 5, Issue 9,   Pages 39-42

Abstract: By means of them a new type of low carbon stainless steel, 14Cr-12Co-5Mo-Me, with ultra-high strength, high plasticity and high toughness was obtained.

Keywords： ultra-high strength stainless steel     Martensitic lath     strength-toughen mechanism    

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Study on an Anti-fatigue Conception of the Ultra-high Strength Steel Part

Zhao Zhenye,Song Deyu,Li Xiangbin,Yang Shuxun,Ma Xinwen

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 51-55

Abstract:

A conception of “un-stressing concentration” anti-fatigue for ultra-high strength steelThe compress stress field and cell structure with high density dislocation were formed in surface layer

Keywords： ultra-high strength steel     anti-fatigue     stress concentration     surface integrity    

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PD pattern recognition based on multi-fractal dimension in GIS

ZHANG Xiaoxing, YAO Yao, TANG Ju, ZHOU Qian, XU Zhongrong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 270-275 doi: 10.1007/s11465-008-0042-1

Abstract: The GIS gray intensity images are constructed based on the mass specimens gathered by the ultra-highfrequency and high-speed sampling systems.

Keywords： substation     high-speed     discharge centrobaric     network     ultra-high frequency    

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Application and Prospects of Water Jet Technology in Petroleum Engineering

Shen Zhonghou,Li Gensheng,Wang Ruihe

Strategic Study of CAE 2002, Volume 4, Issue 12,   Pages 60-65

Abstract:

This paper presents the study and applications of water jet technology in petroleum engineering. A mathematic model of pressure and water power attenuation, under the condition of submergence and nonfreedom, is setup through experiments. A novel method and its model are established to gain maximum hydraulic power at bottomhole and optimize water parameters. In addition, the basic equation and structure model of two kinds of resonating chamber are set up according to transient flow theory and hydro-acoustics. Under the impact of drilling biaxial stress, a model of predicting the fracture propagation is founded utilizing rock fracture mechanics. On the base of above models and theories, three new kinds of bits, i.e. extended nozzle roller bit, self-resonating water jet bit and combined jet and mechanical rock-cutting bit, are developed. Also, the paper points the prospects of applications of water jet technology in deep-well drilling, low-permeability reservoir production, and enhanced oil production.

Keywords： water jet technology     oil well drilling     oil & gas production     high and ultra-high pressure jet    

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Piezoresistive pressure sensor with high sensitivity for medical application using peninsula-island structure

Tingzhong XU, Hongyan WANG, Yong XIA, Zhiming ZHAO, Mimi HUANG, Jiuhong WANG, Libo ZHAO, Yulong ZHAO, Zhuangde JIANG

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 4,   Pages 546-553 doi: 10.1007/s11465-017-0447-9

Abstract: systems piezoresistive pressure sensor with a diagonally positioned peninsula-island structure has highsensitivity for ultra-low-pressure measurement.The pressure sensor was designed with a working range of 0–500 Pa and had a high sensitivity ofThe trade-off between high sensitivity and linearity was alleviated.

Keywords： MEMS     low pressure sensor     peninsula-island     ultra-high sensitivity     medical application    

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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: component of electrolytes, due to its excellent ability to allow graphite anode operation–also required for highIn 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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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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Title Author Date Type Operation

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

Journal Article

CC@BCN@PANI core-shell nanoarrays as ultra-high cycle stability cathode for Zn-ion hybrid supercapacitors

Journal Article

Behavior and strength of headed stud shear connectors in ultra-high performance concrete of composite

Jianan QI, Yuqing HU, Jingquan WANG, Wenchao LI

Journal Article

Flexural and longitudinal shear performance of precast lightweight steel–ultra-high performance concrete

Journal Article

Key Technologies in the Design and Construction of 300 m Ultra-High Arch Dams

Renkun Wang

Journal Article

Steel Fiber–Matrix Interfacial Bond in Ultra-High Performance Concrete: A Review

Yulin Deng,Zuhua Zhang,Caijun Shi,Zemei Wu,Chaohui Zhang

Journal Article

Studying the New Strength-toughen Mechanisms,Developing a New Field of Ultra-high Steel

Zhao Zhenye,Li Zhi,Liu Tianqi,Zhu Jieyuan

Journal Article

Study on an Anti-fatigue Conception of the Ultra-high Strength Steel Part

Zhao Zhenye,Song Deyu,Li Xiangbin,Yang Shuxun,Ma Xinwen

Journal Article

PD pattern recognition based on multi-fractal dimension in GIS

ZHANG Xiaoxing, YAO Yao, TANG Ju, ZHOU Qian, XU Zhongrong

Journal Article

Application and Prospects of Water Jet Technology in Petroleum Engineering

Shen Zhonghou,Li Gensheng,Wang Ruihe

Journal Article

The Ultra-High-Voltage Transmission Project (English)

10 Dec 2022

Conference Videos

The Ultra-High-Voltage Transmission Project (Chinese)

7 Dec 2022

Conference Videos

Piezoresistive pressure sensor with high sensitivity for medical application using peninsula-island structure

Tingzhong XU, Hongyan WANG, Yong XIA, Zhiming ZHAO, Mimi HUANG, Jiuhong WANG, Libo ZHAO, Yulong ZHAO, Zhuangde JIANG

Journal Article

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

Tong Zhang, Elie Paillard

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