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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, suchas methane gas.computational fluid dynamics, a numerical analysis was performed to simulate the ventilation and diffusion of harmfulgases in a shield tunnel, and the effect of ventilation airflow speed on the diffusion of harmful gasesThe results show that the leakage process can be divided into “rapid leakage” and “slight leakage”, depending

Keywords： shield tunnel     harmful gas leakage     numerical analysis     laboratory test    

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Assessment of pollution of potentially harmful elements in soils surrounding a municipal solid waste

Ying Han, Huiting Xie, Wenbin Liu, Haifeng Li, Mengjing Wang, Xuebin Chen, Xiao Liao, Nan Yan

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0873-7

Abstract: Potentially harmful elements in ambient soil of a MSWI were assessed.Health risk assessment of potentially harmful elements in soil was evaluated.contamination levels of Mn, Zn, Cr, Cu, Ni, Pb, As and Hg and the risks posed by these potentially harmfulThe results showed that concentrations of potentially harmful elements in soil were influenced by the

Keywords： Soil     Potentially harmful elements     Contamination     Kriging interpolation     Risk assessment     Wind direction    

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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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Discussion on the collection and transmission equipments’ drive method of oil or gas from the explosionsof Dalian pipeline—gathering and conveyance of oil or gas with the help of passive control drive technology

Zeng Xiangwei,Chen Kun,Qiu Xiaoping,Zeng Xiaoge,Xiang Beiping,Zang Hongbin,Shi Lei,Gong Wei

Strategic Study of CAE 2010, Volume 12, Issue 9,   Pages 34-38

Abstract: China, this paper focused on the collection and transmission equipments' drive method of oil or gasoilcan were discussed in detail, which was very helpful for the collection and transmission of oil or gas

Keywords： passive     control     gathering and conveyance of oil or gas     leakage    

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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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Bacteriophages in water pollution control: Advantages and limitations

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1378-y

Abstract:

•Phages can be better indicators of enteric viruses than fecal indicator bacteria.

Keywords： Phage     Water pollution monitoring     Harmful bacteria biocontrol     Horizontal gene transfer     Bacterial resistance    

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Trends and Management of Harmful Information around the World

Jia Yan1,Li Aiping and Li Yuxiao、Li Shudong、Tian Zhihong、Han Yi、Shi Jinqiao、Lin Bin

Strategic Study of CAE 2016, Volume 18, Issue 6,   Pages 94-98 doi: 10.15302/J-SSCAE-2016.06.019

Abstract:

In view of the management needs of all kinds of harmful information (including terrorism, rumor, fraudviolence, pornography, and subversion) in cyberspace, this paper summarizes the management situation of harmfulThe paper first introduces the definition and classification of harmful information.It then proposes laws and regulations for the supervision of harmful information, and expounds the regulationsagainst network management, this paper introduces the technology and means of network governance over harmful

Keywords： cyberspace     harmful information     information censorship     information filtering     confrontation of public    

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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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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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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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CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage

Frontiers in Energy 2023, Volume 17, Issue 3,   Pages 428-445 doi: 10.1007/s11708-023-0865-9

Abstract: flooding tests were conducted to investigate the performance of injecting different gases to enhance shale gasIn addition, when the CO2 concentration in the mixed gas exceeded 50%, the adsorption capacityof the mixed gas was greater than that of CH4, and had a strong competitive adsorption effectFor the core flooding tests, pure gas injection showed that the breakthrough time of CO2 wasmn>4 of CO2 gas

Keywords： shale gas     gas injection     competitive adsorption     enhanced shale gas recovery     CO2 geological    

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Title Author Date Type Operation

Numerical and experimental analyses of methane leakage in shield tunnel

Journal Article

Assessment of pollution of potentially harmful elements in soils surrounding a municipal solid waste

Ying Han, Huiting Xie, Wenbin Liu, Haifeng Li, Mengjing Wang, Xuebin Chen, Xiao Liao, Nan Yan

Journal Article

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

Yilin ZHANG, Wen WANG

Journal Article

Discussion on the collection and transmission equipments’ drive method of oil or gas from the explosionsof Dalian pipeline—gathering and conveyance of oil or gas with the help of passive control drive technology

Zeng Xiangwei,Chen Kun,Qiu Xiaoping,Zeng Xiaoge,Xiang Beiping,Zang Hongbin,Shi Lei,Gong Wei

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

Bacteriophages in water pollution control: Advantages and limitations

Journal Article

Trends and Management of Harmful Information around the World

Jia Yan1,Li Aiping and Li Yuxiao、Li Shudong、Tian Zhihong、Han Yi、Shi Jinqiao、Lin Bin

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

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

Modeling and analysis of magnetic dipoles in weak magnetic field

WANG Zhaoxia, ZHANG Weimin, LIU Hongguang

Journal Article

CO, N, and CO/N mixed gas injection for enhanced shale gas recovery and CO geological storage

Journal Article