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Numerical and experimental analyses of methane leakage in shield tunnel

Frontiers of Structural and Civil Engineering   Pages 1011-1020 doi: 10.1007/s11709-023-0956-z

Abstract: Tunnels constructed in gas-bearing strata are affected by the potential leakage of harmful gases, suchmethane emission was diluted, and the methane accumulation was only observed in the area near the methane leakageIn addition, laboratory tests on methane leakage through segment joints were performed.The results show that the leakage process can be divided into “rapid leakage” and “slight leakage”, dependingon the leakage pressure and the state of joint deformation.

Keywords： shield tunnel     harmful gas leakage     numerical analysis     laboratory test    

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Overall design and realization of selectivity leakage protection device in mines

Sun Yukun,Zhu Zhiying,Huang Zhenyue,Tang Ping

Strategic Study of CAE 2012, Volume 14, Issue 7,   Pages 93-97

Abstract:

A novel selective leakage protective device in master-slave structurethe principle of additional DC power supply in main feeding switch to examine the occurrence of the leakageIt could improve the action capability and anti-interference capability of the leakage protective devicefor power supply system in underground, and the experimental results confirmed the protection device

Keywords： leakage protection     selectivity     dsPIC30F4012     PIC16F877A     RS-485 bus     optical fiber communication    

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Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 83-92 doi: 10.1007/s11708-010-0125-7

Abstract: The discussion is related to the effect of leakage and friction on the design limit (cooling capacityIn the simulation, the main leakage comes from the gaps between the rotor and the endplates as well asThe decreasing cooling capacity of the meso Wankel compressor increases the proportion of leakage to

Keywords： meso-scale     Wankel compressor     leakage     friction    

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Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 503-521 doi: 10.1007/s11709-023-0927-4

Abstract: This paper presents a novel approach for simulating the localized leakage behavior of segmentally linedThe proposed approach not only simulates localized leakage at the lining segment, but also captures thebehavior, stratum seepage field, and leakage-induced mechanical response of the tunnel lining.the leakage point and slight inward deformation at its diametrically opposite side.The seepage field depends on both the number and location of the leakage zones.

Keywords： segmentally lined tunnel     localized leakage     cohesive element     hydraulic behavior     numerical modeling    

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Long-term settlement behavior of ground around shield tunnel due to leakage of water in soft deposit

Huaina WU, Yeshuang XU, Shui-long SHEN, Jin-chun CHAI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 194-198 doi: 10.1007/s11709-011-0105-y

Abstract: This paper aims to analyze the impact of the leakage of groundwater through segments on the long-term

Keywords： lining deficit     leakage of water     shield tunnel     settlement     soft deposit    

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A building unit decomposition model for energy leakage by infrared thermography image analysis

Yan SU, Fangjun HONG, Lianjie SHU

Frontiers in Energy 2020, Volume 14, Issue 4,   Pages 901-921 doi: 10.1007/s11708-020-0679-y

Abstract: A quantitative energy leakage model was developed based on the thermography image data measured for bothThe uncertainties of the predicted total building energy leakage are about 14.7%, 12.8%, 12.4%, and 15.8%The typical daily thermal energy leakage value in winter is the highest among the four seasons.The present decomposition model for energy leakage is expected to provide a practical tool for quantitativeanalysis of energy leakage of buildings.

Keywords： heat conductivity     heat coefficient     heat &fllig     ux     infrared thermography     thermal image    

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Aggravation of membrane fouling and methane leakage by a three-phase separator in an external anaerobic

Chao Pang, Chunhua He, Zhenhu Hu, Shoujun Yuan, Wei Wang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1131-6

Abstract: itemcontent>

The existence of three-phase separator aggravated methane leakage

Keywords： Anaerobic membrane bioreactor     Three-phase separator     Membrane fouling     Methane leakage     Sludge property    

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Implement and Innovate Environmental Protection Measures, Promote Green Protection of Cultural Relics

Fu-qing Liang,Yong-ping Sun

Frontiers of Engineering Management 2014, Volume 1, Issue 4,   Pages 330-335 doi: 10.15302/J-FEM-2014055

Abstract: The subject is implementing and innovating environmental protection measures, and promoting green protection

Keywords： environmental science     the Three Gorges cultural relics     innovate environmental protection measures     greenprotection    

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Dynamic power-gating for leakage power reduction in FPGAs Research Article

Hadi JAHANIRAD,h.jahanirad@uok.ac.ir

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 4,   Pages 582-598 doi: 10.1631/FITEE.2200084

Abstract: The proposed low-leakage FPGA architecture is compared with state-of-the-art architectures by implementingMoreover, the total power consumption (leakage+dynamic power consumption) is reduced by more than 15%

Keywords： Field programmable gate array (FPGA)     Leakage power     Power-gating     Transistor-level circuit design    

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Leakage location system for oil pipeline on basis of stress wave detection

WANG Bangfeng, CHEN Renwen

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 307-312 doi: 10.1007/s11465-008-0047-9

Abstract: accuracy ratio for the holing alarm is more than 90%, and the time that the system takes to respond to the leakage
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CROP PROTECTION OPENS UP NEW ERA OF CONSERVATION AND UTILIZATION OF GREEN OPTIONS

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 1,   Pages 1-3 doi: 10.15302/J-FASE-2021431

Abstract: Therefore, to solve the problem of crop pests and diseases, suitable green crop protection methods havemajor crop pests provides better pest management and acts as a fundamental part of an integrated plant protectiondocumenting the history of research and application, Chinese laws and regulations related to plant protection

Field management is a traditional conservation agriculture technique on plant protection such

Pesticides are widely used in the crop protection.

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Bioengineering protection mechanism of city rock slope and its laboratory test

Desong JIANG, Minghua ZHAO, Chong JIANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4,   Pages 414-421 doi: 10.1007/s11709-009-0055-9

Abstract: Based on the features of rock slope bioengineering protection, the ecology protection mechanism of theFurthermore, the indoor model experiment of urban crag rock slope ecology protection was designed and

Keywords： indoor     engineering project     protection mechanism     different     runoff lagging    

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Automatic Visual Leakage Detection and Localization from Pipelines in Chemical Process Plants Using Machine Reiew

Mina Fahimipirehgalin, Emanuel Trunzer, Matthias Odenweller, Birgit Vogel-Heuser

Engineering 2021, Volume 7, Issue 6,   Pages 758-776 doi: 10.1016/j.eng.2020.08.026

Abstract:

Liquid leakage from pipelines is a critical issue in large-scale process plants.Recently, the use of infrared (IR) cameras was found to be a promising approach for leakage detectionThe k-nearest neighbor algorithm is used to classify the blocks as normal (without leakage)or anomalous (with leakage).The proposed method has high accuracy and a reasonable detection time for leakage detection.

Keywords： Leakage detection and localization     Image analysis     Image pre-processing     Principle component analysis    

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Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 222-225 doi: 10.1007/s11465-008-0028-z

Abstract: The magnetic leakage field distribution resulting from linear defects of a tube sample in the geomagnetic

Keywords： geomagnetic     theory     important criterion     magnetic leakage     normal component    

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Game Theory Analysis of Marine Rights Protection

Wang Lei, Chen Hua, Kang Meize, Ma Xiaochuan

Strategic Study of CAE 2019, Volume 21, Issue 6,   Pages 80-86 doi: 10.15302/J-SSCAE-2019.06.015

Abstract:

This study discusses marine rights protection from the perspective ofIt introduces the role of marine rights protection in handling marine disputes, as well as the nature, direction, and elements of the game in China’s marine rights protection.To this end, this study categorizes marine rights protection into three basic game processes, i.e., entryIt is concluded that improving technological means for marine rights protection can effectively change

Keywords： marine rights protection     game theory     marine rights protection technology     United Nations Convention    

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Title Author Date Type Operation

Numerical and experimental analyses of methane leakage in shield tunnel

Journal Article

Overall design and realization of selectivity leakage protection device in mines

Sun Yukun,Zhu Zhiying,Huang Zhenyue,Tang Ping

Journal Article

Effects of leakage and friction on the miniaturization of a Wankel compressor

Yilin ZHANG, Wen WANG

Journal Article

Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels

Journal Article

Long-term settlement behavior of ground around shield tunnel due to leakage of water in soft deposit

Huaina WU, Yeshuang XU, Shui-long SHEN, Jin-chun CHAI

Journal Article

A building unit decomposition model for energy leakage by infrared thermography image analysis

Yan SU, Fangjun HONG, Lianjie SHU

Journal Article

Aggravation of membrane fouling and methane leakage by a three-phase separator in an external anaerobic

Chao Pang, Chunhua He, Zhenhu Hu, Shoujun Yuan, Wei Wang

Journal Article

Implement and Innovate Environmental Protection Measures, Promote Green Protection of Cultural Relics

Fu-qing Liang,Yong-ping Sun

Journal Article

Dynamic power-gating for leakage power reduction in FPGAs

Hadi JAHANIRAD,h.jahanirad@uok.ac.ir

Journal Article

Leakage location system for oil pipeline on basis of stress wave detection

WANG Bangfeng, CHEN Renwen

Journal Article

CROP PROTECTION OPENS UP NEW ERA OF CONSERVATION AND UTILIZATION OF GREEN OPTIONS

Journal Article

Bioengineering protection mechanism of city rock slope and its laboratory test

Desong JIANG, Minghua ZHAO, Chong JIANG,

Journal Article

Automatic Visual Leakage Detection and Localization from Pipelines in Chemical Process Plants Using Machine

Mina Fahimipirehgalin, Emanuel Trunzer, Matthias Odenweller, Birgit Vogel-Heuser

Journal Article

Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Journal Article

Game Theory Analysis of Marine Rights Protection

Wang Lei, Chen Hua, Kang Meize, Ma Xiaochuan

Journal Article