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Geothermal energy for sustainable and green energy supply in the future

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Deep Underground Science and Engineering 2024年第3期3卷 255-255页

作者： chunfai leung Jianguo Wang Heping Xie Xiaozhao Li Department of Civil and Environmental Engineering National University of Singapore‐Kent Ridge CampusSingaporeSingapore School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina College of Civil and Transportation Engineering Shenzhen UniversityShenzhenChina State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

Deep Underground Science and Engineering(DUSE)publishes this special issue on geothermal *** guest editors of this special issue are *** Pathegama Gamage(Monash University,Australia),*** Huang(China University of Petroleum,Beijing,China),and *** Bai(Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,China).Geothermal energy is one sustainable and renewable energy and currently a hot research topic in research and *** energy supply is one of the long-term efforts for carbon footprint reductions to tackle climate change *** development of geothermal energy includes exploration and extraction *** special issue is to highlight the challenges on the exploration and extraction of geothermal energy such as initial high cost and difficulties in heat extraction from deep *** special issue focuses on new geothermal extraction system,new theory,new technology,new application of latest techniques such as artificial intelligence,and potential environmental effects.

关键词： Geothermal underground energy

A multiphysical-geochemical coupling model for caprock sealing efficiency in CO_(2) geosequestration

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Deep Underground Science and Engineering 2023年第2期2卷 188-203页

作者： Jianguo Wang Huimin Wang Xiaolin Wang Shengqi Yang Hongtao Wu chunfai leung Jiali Tian School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjingChina School of Engineering University of TasmaniaHobartTasmaniaAustralia Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore

Precipitation or dissolution due to geochemical reactions has been observed in the caprocks for CO_(2) *** reactions modify the caprock sealing efficiency with self-limiting or ***,the effect of this modification on the caprock sealing efficiency has not been fully investigated through multiphysical-geochemical coupling *** this study,a multiphysical-geochemical coupling model was proposed to analyze caprock sealing *** coupling model considered the full couplings of caprock deformation,two-phase flow,CO_(2) concentration diffusion,geochemical reaction,and CO_(2) *** two-phase flow only occurs in the fracture network and the CO_(2) may partially dissolve into water and diffuse through the concentration *** dissolved CO_(2) has geochemical reactions with some critical minerals,thus altering flow *** CO_(2) in the fracture network diffuses into matrix,causing the matrix *** fully coupling model was validated with a penetration experiment on a cement cube and compared with two other models for CO_(2) storage ***,the effects of geochemical reactions on penetration depth and pore pressure were studied through parametric *** numerical simulations reveal that the coupling of geochemical reactions and matrix diffusion significantly affect the caprock sealing *** reactions occur at a short time after the arrival of CO_(2) concentration and modify the fracture *** CO_(2) diffusion into the matrix requires a much longer time and mainly induces matrix *** effects may produce selfenhancement or self-limiting depending on the flow rate in the fracture network,thus significantly modifying caprock sealing efficiency.

关键词： caprock sealing efficiency CO_(2)diffusion CO_(2)geosequestration geochemical reaction sorption strain

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Advancing deep underground research through integration of engineering and science

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Deep Underground Science and Engineering 2022年第1期1卷 1-2页

作者： Heping Xie chunfai leung Jianguo Wang Xiaozhao Li Institute of Deep Earth Sciences&Green Energy Shenzhen UniversityShenzhenChina Sichuan University ChengduChina Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

Deep underground provides enormous resources for mankind,such as energy,minerals,and *** can also provide effective solutions for pollutant disposal,such as nuclear waste disposal and CO_(2) geosequestration,as well as storage *** addition,deep underground is of great necessity because it provides an ultra-quiet environment for scientific research facilities for advanced experiments in physics,chemistry,and medicine.

关键词： addition underground integration

A research on excavation compensation theory for large deformation disaster control and a review on the multiphysical-multiscale responses of salt rock for underground gas storage

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Deep Underground Science and Engineering 2023年第2期2卷 103-104页

作者： Jianguo Wang Heping Xie chunfai leung Xiaozhao Li School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina Institute of Deep Earth Sciences and Green Energy Shenzhen UniversityShenzhenChina College of Water Resource and Hydropower Sichuan UniversityChengduChina Center for Offshore Research and Engineering National University of SingaporeSingapore State Key Laboratory for Geotechnics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

We highlight two articles in this issue:A research article titled“Excavation compensation theory and supplementary technology system for large deformation disasters”by Manchao He et *** a review article titled“Mine... 详细信息

关键词： underground rock deformation

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New understandings on initiation and evolution of disasters in deep underground

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Deep Underground Science and Engineering 2023年第3期2卷 205-206页

作者： Jianguo Wang Heping Xie chunfai leung Xiaozhao Li School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina Institute of Deep Earth Sciences and Green Energy Shenzhen UniversityShenzhenChina College of Water Resource and Hydropower Sichuan UniversityChengduChina Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore State Key Laboratory for Geotechnics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

The editors wish to highlight the articles appearing in this *** first article,entitled“New physics of supersonic ruptures”by Boris ***,concerns the development of a new theory on the potential occurrence of ruptures after deep underground *** other articles belong to our first special theme of“Disaster evolution in deep underground.”The final two articles introduce a nonlocal damage fracture phasefield model for rock‐like materials and the gas–liquid displacement in microcleats for mass transfer through gas‐or water‐driven *** five papers indeed explore various aspects of deep underground science and engineering and constitute an integral component of deep underground fundamentals.

关键词： underground displacement evolution

A Simple Embedding Method for the Laplace-Beltrami Eigenvalue Problem onImplicit Surfaces

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Communications on Applied Mathematics and Computation 2024年第2期6卷 1189-1216页

作者： Young Kyu Lee Shingyu leung Department of Mathematics The Hong Kong University of Science and TechnologyClear Water BayHong KongChina

We propose a simple embedding method for computing the eigenvalues and eigenfunctions of the Laplace-Beltrami operator on implicit *** approach follows an embedding approach for solving the surface eikonal *** replace the differential operator on the interface with a typical Cartesian differential operator in the surface *** proposed algorithm is easy to implement and *** will give some two-and three-dimensional numerical examples to demonstrate the effectiveness of our proposed approach.

关键词： Laplace-Beltrami operator Level set method Implicit representation Eigenvalues Numerical PDEs

Changes of tropical cyclone size in three oceanic basins of the northern hemisphere from 2001 to 2021

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Frontiers of Earth Science 2024年第2期18卷 312-323页

作者： Banglin ZHANG Jeremy Cheuk-Hin leung Shengyuan LIU Jianjun XU Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction CMAGuangzhou 510640China College of Atmospheric Science Lanzhou UniversityLanzhou 730020China College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China CMA-GDOU Joint Laboratory for Marine Meteorology&South China Sea Institute of Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China

In this study the changes of tropical cyclone(TC)size from 2001 to 2021 are analyzed based on linear and quadratic curve fittings of the National Hurricane Center(NHC)/Joint Typhoon Warning Center(JTWC)best track data,based on the radius of maximum wind(RMW)and the average radius of 34-kt wind(AR34),in three oceanic basins of the North Atlantic(NATL),the Western North Pacific(WPAC)and the Eastern North Pacific(EPAC).The computations are done separately for two categories of tropical cyclones:tropical storms(TS)and hurricanes(HT).Size changes of landfalling and non-landfalling TCs are also *** show that there is a great inter-basin variability among the changes in TC *** conclusions include:1)overall,the inner cores of TSs have become larger in all three basins,with the increasing tendencies being significant in the NATL and WAPC,while those of HTs mostly get smaller or remain similar;2)meanwhile,comparatively large inter-basin differences are observed for the TC outer core sizes,and the sizes of landfalling TCs;3)particularly,a significant decrease in landfalling HT outer core size is observed over the EPAC;4)in contrast,significant increases in landfalling TS inner core size are found over the NATL and *** presented analysis results could benefit future research about TC forecasts,storm surge studies,and the cyclone climate and its changes.

关键词： tropical cyclone storm size frequency intensity duration

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Editorial highlights

Deep Underground Science and Engineering 2023年第1期2卷 1-1页

作者： Qingbin Meng Heping Xie chunfai leung Xiaozhao Li Jianguo Wang State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and TechnologyXuzhouChina Institute of Deep Earth Sciences&Green Energy Shenzhen UniversityShenzhenChina Sichuan University ChengduChina Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina

With the increasing scarcity of shallow resources,the mining depth of coal mines has gradually increased,and the safety problem has become increasingly *** grouting technology for deep roadways in fractured rocks is one of key technologies for safe mining of deep *** paper by the team of Hongpu Kang,academician of the Chinese Academy of Engineering,systematically summarizes and analyzes the research findings in the theory,design,materials,processes,and equipment for the grouting reinforcement of fractured rocks surrounding the deep *** field cases in the Kouzidong coal mine are demonstrated on the application of pregrouting in front of heading faces,grouting in excavation,and postgrouting so as to evaluate the effects of these grouting reinforcements.

关键词： mining heading shallow

Translating bacteriophage-derived depolymerases into antibacterial therapeutics:Challenges and prospects

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Acta Pharmaceutica Sinica B 2024年第1期14卷 155-169页

作者： Honglan Wang Yannan Liu Changqing Bai Sharon Shui Yee leung School of Pharmacy the Chinese University of Hong KongHong Kong SARChina Emergency Medicine Clinical Research Center Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China Department of Respiratory Shenzhen University General HospitalShenzhen University Clinical Medical AcademyGuangdong 518055China

Predatory bacteriophages have evolved a vast array of depolymerases for bacteria capture and *** depolymerases are enzymes responsible for degrading diverse bacterial surface *** are exploited as antibiofilm agents and antimicrobial adjuvants while rarely inducing bacterial resistance,making them an invaluable asset in the era of antibiotic *** depolymerases have been investigated preclinically,with evidence indicating that depolymerases with appropriate dose regimens can safely and effectively combat different multidrug-resistant pathogens in animal infection ***,some formulation approaches have been developed for improved stability and activity of ***,depolymerase formulation is limited to liquid dosage form and remains in its infancy,posing a significant hurdle to their clinical translation,compounded by challenges in their applicability and *** development must address these obstacles for clinical ***,after unravelling the history,diversity,and therapeutic use of depolymerases,we summarized the preclinical efficacy and existing formulation findings of recombinant ***,the challenges and perspectives of depolymerases as therapeutics for humans were assessed to provide insights for their further development.

关键词： Phage-derived polysaccharide depolymerases Bacteriophage proteins Bacterial capsules Polysaccharide capsules Antibiotic resistance Biofilms Antibacterial therapy Antimicrobial adjuvants Combination treatment