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Continental oil production 1

DC circuit breaker 1

DC solid state transformer 1

Gulong shale 1

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acoustic emission technology 1

benzyl alcohol self-etherification reaction 1

carrier-based PWM 1

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enterprise-wide optimization 1

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high voltage direct current 1

hydrogen adsorption 1

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Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic acid

Jun Wei, Jianbo Zhao, Di Cai, Wenqiang Ren, Hui Cao, Tianwei Tan

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 857-867 doi: 10.1007/s11705-019-1880-6

Abstract: Brunauer–Emmet–Teller analysis results of the carbonization product confirmed that the prepared PCs presented multilevelpore structure, and the diameters of most pores were 0.78 and 3.97 nm; moreover, the pore size distribution

Keywords： porous carbon     multilevel pores     polyaspartic acid     cross-linking     hydrogen adsorption    

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Perspectives in multilevel decision-making in the process industry

Braulio BRUNAUD, Ignacio E. GROSSMANN

Frontiers of Engineering Management 2017, Volume 4, Issue 3,   Pages 256-270 doi: 10.15302/J-FEM-2017049

Abstract: We propose a network representation for the multilevel decision structure and analyze the componentsWe conclude by summarizing the challenges that hinder the full integration of multilevel decision making

Keywords： supply chain optimization     enterprise-wide optimization     multilevel optimization     planning     scheduling    

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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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Exploring the Logic and Landscape of the Knowledge System: Multilevel Structures, Each Multiscaled with

Jinghai Li

Engineering 2016, Volume 2, Issue 3,   Pages 276-285 doi: 10.1016/J.ENG.2016.03.001

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Effect of TGO on the tensile failure behavior of thermal barrier coatings

Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 4,   Pages 452-460 doi: 10.1007/s11465-019-0541-2

Abstract: TGO growth resulted in the generation of pores at the interface between the TGO and bond layer.The pores produced by TGO under tensile load delayed the generation of surface cracks and thus prolonged

Keywords： thermally grown oxides     thermal barrier coatings     acoustic emission technology     digital image correlation     pores    

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Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 418-423 doi: 10.1007/s11465-006-0050-y

Abstract: In an effort to explore the contribution of the pad, which is usually full of pores, to the performanceThe flow equation is deduced accordingly and, by taking advantage of the multilevel technique and lineA pad full of large pores will be used to deduce load capability, facilitating the free flow of the fluidsthrough the pores.

Keywords： multilevel technique     three-dimensional     proportional     research     thicker    

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Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai

Lu QU, Zhanqing YU, Qiang SONG, Zhichang YUAN, Biao ZHAO, Dawei YAO, Jianfu CHEN, Yao LIU, Rong ZENG

Frontiers in Energy 2019, Volume 13, Issue 1,   Pages 120-130 doi: 10.1007/s11708-018-0599-2

Abstract: The DC distribution system is an important development direction of the distribution system, which can improve the reliability and the quality of the power supply, and support the new energy, the energy storage, the electric vehicles, and the flexible access of AC and DC loads to grid. To realize the demonstration application of the DC distribution technology, China’s first demonstration project of the medium voltage DC distribution network will be built in Zhuhai, Guangdong Province to support the construction of the city energy internet. First, this paper analyzes the demand of the DC distribution network project, and puts forward the construction content and construction target. Then, it designs and analyzes the electrical connection mode, system operation mode, and startup and shutdown mode of the DC distribution network, and proposes the overall project construction plan. Finally, it conducts the specific project design and analysis, which mainly include the selection of equipment such as inverters, DC transformers and DC circuit breakers, the design and analysis of the DC control and protection system, the design and analysis of the over-voltage protection and the configuration scheme of the lightning arrester, and analysis of the system transient characteristics. The design and analysis of the engineering program is a combination of China’s distribution network engineering practice and technical characteristics, which lays a solid foundation for the advancement of the DC power distribution technology in China, and has reference value and demonstration effect for the design and construction of other projects.

Keywords： MVDC distribution network     DC solid state transformer     DC circuit breaker     modular multilevel converter    

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A Novel PWM Method of Diode-clamped Multilevel Inverter at Low Modulation Indices

Xin Xiang,Zhang Qingfan,Hu Shunquan,Li Ruilai

Strategic Study of CAE 2007, Volume 9, Issue 10,   Pages 91-96

Abstract:

Diode-clamped multilevel inverter is a kind of power converter which

Keywords： diode-clamped inverter     carrier-based PWM     low modulation index     redundant state    

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The effect of hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios on its pore structure and catalytic performance

Yuexin Hou, Xiaoyun Li, Minghui Sun, Chaofan Li, Syed ul Hasnain Bakhtiar, Kunhao Lei, Shen Yu, Zhao Wang, Zhiyi Hu, Lihua Chen, Bao-Lian Su

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 269-278 doi: 10.1007/s11705-020-1948-3

Abstract: Hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios (Hier-ZSM-5- , where = 50, 100, 150 and 200) were synthesized using an ordered mesoporous carbon-silica composite as hard template. Hier-ZSM-5- exhibits improved mass transport properties, excellent mechanical and hydrothermal stability, and higher catalytic activity than commercial bulk zeolites in the benzyl alcohol self-etherification reaction. Results show that a decrease in the Si/Al ratio in hierarchical single-crystal ZSM-5 zeolites leads to a significant increase in the acidity and the density of micropores, which increases the final catalytic conversion. The effect of porous hierarchy on the diffusion of active sites and the final catalytic activity was also studied by comparing the catalytic conversion after selectively designed poisoned acid sites. These poisoned Hier-ZSM-5- shows much higher catalytic conversion than the poisoned commercial ZSM-5 zeolite, which indicates that the numerous intracrystalline mesopores significantly reduce the diffusion path of the reactant, leading to the faster diffusion inside the zeolite to contact with the acid sites in the micropores predominating in ZSM-5 zeolites. This study can be extended to develop a series of hierarchical single-crystal zeolites with expected catalytic performance.

Keywords： hierarchical zeolites     single crystalline     interconnected pores     improved diffusion performance     benzyl alcohol    

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The Geoscience Frontier of Gulong Shale Oil: Revealing the Role of Continental Shale from Oil Generation to Production Article

Wenyuan He, Rukai Zhu, Baowen Cui, Shuichang Zhang, Qian Meng, Bin Bai, Zihui Feng, Zhengdong Lei, Songtao Wu, Kun He, He Liu, Longde Sun

Engineering 2023, Volume 28, Issue 9,   Pages 79-92 doi: 10.1016/j.eng.2022.08.018

Abstract: Favorable storage spaces in Gulong shale include connecting pores and lamellar fractures developedThe shale oil mainly occurs in micro- and nano-pores, bedding
fractures, and lamellar fractures

Keywords： Gulong shale     Gulong shale oil     Micro-nano pores     Lamellar fracture     Continental oil production    

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Title Author Date Type Operation

Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic acid

Jun Wei, Jianbo Zhao, Di Cai, Wenqiang Ren, Hui Cao, Tianwei Tan

Journal Article

Perspectives in multilevel decision-making in the process industry

Braulio BRUNAUD, Ignacio E. GROSSMANN

Journal Article

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

Journal Article

Exploring the Logic and Landscape of the Knowledge System: Multilevel Structures, Each Multiscaled with

Jinghai Li

Journal Article

Effect of TGO on the tensile failure behavior of thermal barrier coatings

Le WANG, Yuelan DI, Ying LIU, Haidou WANG, Haoxing YOU, Tao LIU

Journal Article

Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Journal Article

Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai

Lu QU, Zhanqing YU, Qiang SONG, Zhichang YUAN, Biao ZHAO, Dawei YAO, Jianfu CHEN, Yao LIU, Rong ZENG

Journal Article

A Novel PWM Method of Diode-clamped Multilevel Inverter at Low Modulation Indices

Xin Xiang,Zhang Qingfan,Hu Shunquan,Li Ruilai

Journal Article

The effect of hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios on its pore structure and catalytic performance

Yuexin Hou, Xiaoyun Li, Minghui Sun, Chaofan Li, Syed ul Hasnain Bakhtiar, Kunhao Lei, Shen Yu, Zhao Wang, Zhiyi Hu, Lihua Chen, Bao-Lian Su

Journal Article

The Geoscience Frontier of Gulong Shale Oil: Revealing the Role of Continental Shale from Oil Generation to Production

Wenyuan He, Rukai Zhu, Baowen Cui, Shuichang Zhang, Qian Meng, Bin Bai, Zihui Feng, Zhengdong Lei, Songtao Wu, Kun He, He Liu, Longde Sun

Journal Article