Resource Type

Journal Article 162

Year

2023 12

2022 12

2021 11

2020 14

2019 11

2018 15

2017 13

2016 5

2015 8

2014 4

2013 3

2012 7

2011 6

2010 7

2009 6

2008 5

2007 4

2006 3

2005 2

2004 3

open ︾

Keywords

CFR dams 2

Face recognition 2

Free nitrous acid 2

arch dam 2

concrete face 2

concrete face rockfill dam 2

finite element method 2

free vibration 2

free vibration analysis 2

hydrogen-free carburizing 2

-butane 1

25-furandicarboxylic acid 1

3D face reconstruction 1

5-hydroxymethyl-2-furfural 1

5-hydroxymethylfurfural 1

In situ generation 1

Sphingopyxis sp 1

AFP 1

ALL FREE 1

open ︾

Search scope:

排序： Display mode:

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled with high-pressure waterjet

Frontiers of Structural and Civil Engineering   Pages 1370-1386 doi: 10.1007/s11709-023-0947-0

Abstract: The tunnel boring machine (TBM) is typically used in hard-rock tunnel excavation. Owing to the unsatisfactory adaptability of TBM to the surrounding rock, when crossing high-strength and high-wear strata, the TBM can easily cause defects, such as abnormal wear on cutters and overload damage to bearings, thus affecting the construction efficiency and cost. Therefore, high-pressure waterjet technology should be applied to assist in rock breaking for efficient TBM tunneling. In this study, the effects of water pressure, nozzle diameter, and nozzle speed on cutting are investigated via laboratory experiments of cutting hard rock using high-pressure waterjets. The penetration performance of the TBM under different water pressures is investigated via a field industrial penetration test. The results show that high-pressure waterjets are highly efficient for rock breaking and are suitable for industrial applications, as they can accommodate the advancing speed of the TBM and achieve high-efficiency rock breaking. However, during the operation of high-pressure waterjets, the ambient temperature and waterjet temperature in the tunnel increase significantly, which weakens the cooling effect of the cutterhead and decreases the construction efficiency of the TBM. Therefore, temperature control and cooling measures for high-pressure waterjets during their long-term operation must be identified. This study provides a useful reference for the design and construction of high-pressure water-jet-assisted cutterheads for breaking road headers.

Keywords： tunnel boring machine     hard-rock cutting     free face     disc cutter     rock-cutting efficiency    

HTML PDF Collect

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 522-532 doi: 10.1007/s11709-023-0930-9

Abstract: Engineering safety during maintenance outages is determined by the stability of the tunnel face.The tunnel face is supported by a medium at the bottom of the excavation chamber and compressed air atOwing to the high risk of face failure, the necessity of support pressure when cutterhead support isDisregarding the supporting effect of the cutterhead will result in a tunnel face with underestimated

Keywords： tunnel face stability     cutterhead configuration     aperture ratio     pressure gradient     support ratio    

HTML PDF Collect

Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0689-z

Abstract: However, they have not been introduced into gas face seal diagnosis tasks because of the unacceptablepresented work provides a quantitative, explainable, and feasible approach for identifying the cause of gas faceIt is also applicable to mechanical devices that face similar difficulties.

Keywords： surrogate model     gas face seal     fault diagnosis     nonlinear dynamics     tribology    

HTML PDF Collect

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: fiber-reinforced cementitious composites (FRCC) were applied to strengthen the concrete slabs in a concrete-face

Keywords： cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening     concrete-face    

HTML PDF Collect

Dynamic in-plane transversal normal stresses in the concrete face of CFRD

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 135-148 doi: 10.1007/s11709-018-0481-7

Abstract: Severe earthquakes can induce damages to Concrete Face Rockfill Dams (CFRDs) such as concrete crackingcomplement of a method recently developed to evaluate in-plane transversal normal stresses in the concrete faceIn the above reference, the method to evaluate the concrete face in-plane transversal normal stresses

Keywords： CFR dams     dynamic analysis     in-plane normal stresses     concrete face    

HTML PDF Collect

Local uncorrelated local discriminant embedding for face recognition

Xiao-hu MA,Meng YANG,Zhao ZHANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 3,   Pages 212-223 doi: 10.1631/FITEE.1500255

Abstract: The feature extraction algorithm plays an important role in face recognition.

Keywords： Feature extraction     Local discriminant embedding     Local uncorrelated criterion     Face recognition    

HTML PDF Collect

In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 81-91 doi: 10.1007/s11709-016-0378-2

Abstract: concrete slabs on the first-dam reservoir filling in-plane transversal normal stresses in the concrete facetransversal compressive stresses develop within the concrete panels located in the central concrete face3D finite difference analyses, a simple method to estimate in-plane normal stresses in the concrete face

Keywords： concrete face     CFR dams     reservoir filling     slab in-plane stresses    

HTML PDF Collect

Model test and discrete element method simulation of shield tunneling face stability in transparent clay

Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 147-166 doi: 10.1007/s11709-020-0704-6

Abstract: The stability of the shield tunneling face is an extremely important factor affecting the safety of tunnelThe stability of the shield tunneling face (failure mode, influence range, support force, and surfaceto investigate the active failure mode, influence range, and support force of the shield tunneling facethree-dimensional numerical simulations are conducted to verify the failure mode of the shield tunneling face

Keywords： shield tunneling face     stability     transparent clay     model test     numerical simulation    

HTML PDF Collect

Investigation of Generalized SIFs of cracks in 3D piezoelectric media under various crack-face conditions

Jaroon RUNGAMORNRAT, Bounsana CHANSAVANG, Weeraporn PHONGTINNABOOT, Chung Nguyen VAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 280-298 doi: 10.1007/s11709-019-0586-7

Abstract: This paper investigates the influence of crack geometry, crack-face and loading conditions, and the permittivitymode-I stress intensity factors ( ) for two representative non-planar cracks under different crack-face

Keywords： crack-face conditions     intensity factors     non-flat cracks     permittivity     piezoelectric media     SGBEM    

HTML PDF Collect

Cell-free systems in the new age of synthetic biology

Fernando Villarreal,Cheemeng Tan

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 1,   Pages 58-65 doi: 10.1007/s11705-017-1610-x

Abstract: The advent of synthetic biology has ushered in new applications of cell-free transcription-translationThese cell-free systems are reconstituted using cellular proteins, and are amenable to modular controlHere, we discuss the historical advancement of cell-free systems, as well as their new applications inFinally, we present our vision on the future direction of cell-free synthetic biology.

Keywords： cell-free system     application    

HTML PDF Collect

New concept of design for high concrete face rockfill dams

Li Nenghui

Strategic Study of CAE 2011, Volume 13, Issue 3,   Pages 12-18

Abstract:

Based on analysis of experimential design for concrete face rockfilldams and its imperfection, a new design concept of high concrete face rockfill dams which includes stability

Keywords： concrete face rockfill dam     design concept     stability safety     seepage safety     deformation safety    

HTML PDF Collect

Recent advances in cycloaddition of CO with epoxides: halogen-free catalysis and mechanistic insights

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1879-1894 doi: 10.1007/s11705-023-2354-4

Abstract: To address these concerns, the halogen-free cycloaddition of CO2 with epoxides has alwaysIn this review, we systematically discussed the halogen-free catalysis for cycloaddition of CO2freeSpecially, metal oxides as the potential halogen-free catalysts are highlighted due to their flexible

Keywords： carbon dioxide     halogen-free catalysis     cyclic carbonate     mechanistic insight    

HTML PDF Collect

Hollow carbon spheres and their noble metal-free hybrids in catalysis

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1380-1407 doi: 10.1007/s11705-021-2097-z

Abstract: Herein, we overview hollow carbon sphere-based materials and their noble metal-free hybrids in catalysiscontrolling pore structure and surface morphology, and then heterogeneous doping as well as their metal-free

Keywords： hollow carbon spheres     functionalization     noble metal-free     catalysis    

HTML PDF Collect

Face recognition based on subset selection via metric learning on manifold

Hong SHAO,Shuang CHEN,Jie-yi ZHAO,Wen-cheng CUI,Tian-shu YU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 12,   Pages 1046-1058 doi: 10.1631/FITEE.1500085

Abstract: With the development of face recognition using sparse representation based classification (SRC), manyelements correctly by taking into account the interclass/intraclass relationship and manifold structure of face

Keywords： Face recognition     Sparse representation     Manifold structure     Metric learning     Subset selection    

HTML PDF Collect

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1106-7

Abstract:

PFRs were produced on biochar during Cr(VI) decontamination.

PFRs formation on biochar was owing to the oxidization of phenolic-OH by Cr(VI).

Appearance of excessive oxidant led to the consumption of PFRs on biochar.

Biochar charred at high temperature possessed great performance to Cr(VI) removal.

Keywords： Biochar     Persistent free radicals     Phenolic hydroxyl groups     Cr(VI) reduction    

HTML PDF Collect

Title Author Date Type Operation

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled with high-pressure waterjet

Journal Article

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Journal Article

Method for solving the nonlinear inverse problem in gas face seal diagnosis based on surrogate models

Journal Article

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Journal Article

Dynamic in-plane transversal normal stresses in the concrete face of CFRD

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Journal Article

Local uncorrelated local discriminant embedding for face recognition

Xiao-hu MA,Meng YANG,Zhao ZHANG

Journal Article

In-plane transversal normal stresses in the concrete face of CFRD induced by the first-dam reservoir

Neftalí SARMIENTO-SOLANO, Miguel P. ROMO

Journal Article

Model test and discrete element method simulation of shield tunneling face stability in transparent clay

Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU

Journal Article

Investigation of Generalized SIFs of cracks in 3D piezoelectric media under various crack-face conditions

Jaroon RUNGAMORNRAT, Bounsana CHANSAVANG, Weeraporn PHONGTINNABOOT, Chung Nguyen VAN

Journal Article

Cell-free systems in the new age of synthetic biology

Fernando Villarreal,Cheemeng Tan

Journal Article

New concept of design for high concrete face rockfill dams

Li Nenghui

Journal Article

Recent advances in cycloaddition of CO with epoxides: halogen-free catalysis and mechanistic insights

Journal Article

Hollow carbon spheres and their noble metal-free hybrids in catalysis

Journal Article

Face recognition based on subset selection via metric learning on manifold

Hong SHAO,Shuang CHEN,Jie-yi ZHAO,Wen-cheng CUI,Tian-shu YU

Journal Article

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Journal Article