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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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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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Geoenvironmental Hazard Risks and Monitoring Technologies for Marine Carbon Sequestration

Zhang Shaopeng, Liu Xiaolei, Cheng Guangwei, Zhu Chaoqi, Li Qingping, He Yufa

Strategic Study of CAE 2023, Volume 25, Issue 3,   Pages 122-130 doi: 10.15302/J-SSCAE-2023.03.011

Abstract:  However, there exist risks of carbon dioxide (CO2) leakage that leads to seabed geological disastersmarine carbon geological sequestration and explores the disaster mechanism associated with CO2 leakagetests via examples and analyzes the environmental geology monitoring technologies related to CO2 leakage, including seismic investigation and monitoring, resistivity monitoring, gravity monitoring, seabeddeformation monitoring, and sediment pore pressure monitoring.

Keywords： marine carbon geological sequestration     environmental geology     CO2 leakage     hazard risks     monitoring    

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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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Current Status and Outlook of Offshore CO2 Pipeline Transportation Technologies

Wang Ziming, Li Qingping, Li Jianghui, Fan Zhenning, Zhang Jian

Strategic Study of CAE doi: 10.15302/J-SSCAE-2023.06.017

Abstract: process technologies include CO2 fluid state analysis and flow assurance; corrosion evaluation, monitoring, and early warning; real-time monitoring of pipe leakage; and release of high-pressure CO2 and

Keywords： CO2 pipeline     offshore CCUS     subsea pipeline     pipeline corrosion     pipeline fracture     leakage monitoring    

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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: An online monitoring system was developed for rapidly determining the exact location of the holing positionin an oil pipeline by monitoring and analyzing the characteristics of the strain wave caused by theaccuracy 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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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.Therefore, the detection and localization of leakages is a crucial task for maintenance and condition monitoringRecently, the use of infrared (IR) cameras was found to be a promising approach for leakage detectionor 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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Non-invasive continuous blood pressure monitoring: a review of current applications

Elena Chung, Guo Chen, Brenton Alexander, Maxime Cannesson

Frontiers of Medicine 2013, Volume 7, Issue 1,   Pages 91-101 doi: 10.1007/s11684-013-0239-5

Abstract:

Blood pressure monitoring has come a long way from the initial observations made by Reverend HalesThere are none that deny the importance of monitoring perioperative blood pressure; however, the limitedability of the current prevalent technology (oscillometric blood pressure monitoring) to offer continuousInvasive monitoring is able to detect beat-to-beat blood pressure measurement, but the risks inherent, and especially the creation of those offering non-invasive but continuous blood pressure monitoring

Keywords： non-invasive blood pressure monitoring     continuous blood pressure monitoring     invasive blood pressure monitoring    

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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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Continuous dynamic monitoring of a centenary iron bridge for structural modification assessment

Carmelo GENTILE,Antonella SAISI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1,   Pages 26-41 doi: 10.1007/s11709-014-0284-4

Abstract: A multi-channel continuous dynamic monitoring system has been installed in a centenary iron arch bridgeThe monitoring project follows a series of preliminary ambient vibration tests carried out on the bridgedynamic characteristics identified from the experimental studies developed since 2009, the installed monitoring

Keywords： automated modal identification     continuous dynamic monitoring     environmental/operational effects     iron archbridge     structural health monitoring    

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In-situ condition monitoring of reinforced concrete structures

Sanjeev Kumar VERMA,Sudhir Singh BHADAURIA,Saleem AKHTAR

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 4,   Pages 420-437 doi: 10.1007/s11709-016-0336-z

Abstract: modeling of physical deterioration mechanisms, performance characteristics and parameters and condition monitoring

Keywords： concrete     carbonation     chloride     corrosion     monitoring     models    

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Title Author Date Type Operation

Numerical and experimental analyses of methane leakage in shield tunnel

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

Geoenvironmental Hazard Risks and Monitoring Technologies for Marine Carbon Sequestration

Zhang Shaopeng, Liu Xiaolei, Cheng Guangwei, Zhu Chaoqi, Li Qingping, He Yufa

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

Current Status and Outlook of Offshore CO2 Pipeline Transportation Technologies

Wang Ziming, Li Qingping, Li Jianghui, Fan Zhenning, Zhang Jian

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

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

Non-invasive continuous blood pressure monitoring: a review of current applications

Elena Chung, Guo Chen, Brenton Alexander, Maxime Cannesson

Journal Article

Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Journal Article

Continuous dynamic monitoring of a centenary iron bridge for structural modification assessment

Carmelo GENTILE,Antonella SAISI

Journal Article

In-situ condition monitoring of reinforced concrete structures

Sanjeev Kumar VERMA,Sudhir Singh BHADAURIA,Saleem AKHTAR

Journal Article