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多样化二氧化碳去除方法下交通部门使用氢能的潜在效益和权衡

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Science Bulletin 2024年第1期69卷 34-39页

作者：刘海峰 Jeffrey dankwa Ampah Sandylove Afrane humphrey Adun 金超尧命发 State Key Laboratory of Engines Tianjin UniversityTianjin 300072China School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China Energy Systems Engineering department Cyprus International UniversityHaspolat-Lefkosa Mersin 10Turkey

Climate change remains arguably one of the most important issues facing the world in the 21st *** to the Paris Agreement,the world should strive to limit global mean temperature change by 2100 to below 1.5-2℃above pre-industrial levels[1].To achieve this goal,global net carbon dioxide(CO_(2))emissions should reach zero no later than 2050 for the realization of the1.5℃target and 2070 for the 2℃target,respectively[2].Since the introduction of this global commitment,several mitigation options have been proposed to achieve the climate goal.

关键词：潜在效益 global climate

Effect of Lateritic Stone Aggregate and Coconut Husk Fiber on the Properties of Concrete

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Open Journal of Civil Engineering 2024年第2期14卷 240-257页

作者： Edmund Borbi humphrey danso Emmanuel Appiah-Kubi department of Construction Technology and Management Education Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Kumasi Ghana department of Architecture and Civil Engineering Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development Kumasi Ghana

Natural stone aggregate forms the bulk volume of concrete and has contributed to the increased cost of concrete production. This has led to the search for alternate aggregates such as lateritic stone for concrete production. This paper investigates the engineering properties of concrete produced with lateritic aggregate (LA) as the coarse aggregate replacement and coconut husk fibre (CHF) as reinforcement. Natural stone aggregate was replaced by LA at 0%, 10%, 20%, 30%, 40%, and 50%, with 0.25% constant CHF by weight. A mix proportion of 1:1.5:3 with a water-cement ratio of 0.6 was used for producing concrete. A total of 162 specimens (90 cubes and 72 beams) were prepared and tested at the 7, 14, 21, and 28 days of curing. The highest compressive strength was 43.36 N/mm2 (10% LA replacement) as compared to the control of 41.51 N/mm2. The 10% LA replacement obtained the highest flexural strength of 5.35 N/mm2 as compared with the 5.29 N/mm2 for the control. The water absorption of the concrete increased from 2.8% (control) to 3.57% (50% replacement LA). Scanning electron microscopy (SEM) revealed micro gaps between CHF and LA concrete. The study, therefore, concludes that the use of LA and CHF positively influenced the strength properties of concrete. 10% LA replacement of coarse aggregate and 0.25% CHF is recommended to practitioners for use.

关键词： Concrete Coarse Aggregate Compressive Strength Flexural Strength Natural Stone Aggregate SEM

多样化二氧化碳去除方法下交通部门使用氢能的潜在效益和权衡（英文）

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Science Bulletin 2024年第1期 34-39页

作者：刘海峰 Jeffrey dankwa Ampah Sandylove Afrane humphrey Adun 金超尧命发 State Key Laboratory of Engines Tianjin University School of Environmental Science and Engineering Tianjin University Energy Systems Engineering department Cyprus International University

Climate change remains arguably one of the most important issues facing the world in the 21st *** to the Paris Agreement,the world should strive to limit global mean temperature change by 2100 to below 1.5-2℃above pre-industrial levels[1].To achieve this goal,global net carbon dioxide (CO2) emissions should reach zero no later than 2050 for the realization of the1.5℃target and 2070 for the 2℃target,respectively [2].Since the introduction of this global commitment,several mitigation options have been proposed to achieve the climate ***,

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Snapshot imaging of ultrashort electron bunches

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Light(Science & Applications) 2024年第7期13卷 1226-1228页

作者： Andreas döpp Ludwig-Maximilian-Universität München Am Coulombwall 185748GarchingGermany Max Planck Institut für Quantenoptik Hans-Kopfermann-Strasse 1Garching85748Germany

New measurements combine spatial and temporal information from optical transition radiation to estimate the three-dimensional structure of electron bunches from a laser wakefield accelerator.

关键词： ultrashort Snapshot electron

Influence of variable viscosity and double diffusion on the convective stability of a nanofluid flow in an inclined porous channel

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 563-580页

作者： N.HUMNEKAR d.SRINIVASACHARYA department of Mathematics National Institute of TechnologyWarangal 506004TelanganaIndia

The influence of variable viscosity and double diffusion on the convective stability of a nanofluid flow in an inclined porous channel is *** darcyBrinkman model is used to characterize the fluid flow dynamics in porous *** analytical solutions are obtained for the unidirectional and completely developed *** on a normal mode analysis,the generalized eigenvalue problem under a perturbed state is *** eigenvalue problem is then solved by the spectral ***,the critical Rayleigh number with the corresponding wavenumber is evaluated at the assigned values of the other flow-governing *** results show that increasing the darcy number,the Lewis number,the dufour parameter,or the Soret parameter increases the stability of the system,whereas increasing the inclination angle of the channel destabilizes the ***,the flow is the most unstable when the channel is vertically oriented.

关键词： nanofluid inclined channel variable viscosity linear stability double dif-fusion porous medium

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通用电气拆分记

商业周刊（中文版） 2024年第8期 56-63页

作者： brooke Sutherland Ryan Been Antoine Maillard(插画) 不详

在通用电气公司位于俄亥俄州比弗克里克市的厂,一间会议室里四周贴满了一张张大白纸。每张纸上都有记号笔写的潦草字迹,还覆盖着用各种彩色便利贴做的注释,里面总结了各种管子和导管的生产步骤,这些部件最后都会组装到某架喷气发动机上... 详细信息

在通用电气公司位于俄亥俄州比弗克里克市的厂,一间会议室里四周贴满了一张张大白纸。每张纸上都有记号笔写的潦草字迹,还覆盖着用各种彩色便利贴做的注释,里面总结了各种管子和导管的生产步骤,这些部件最后都会组装到某架喷气发动机上。这里的氛围更像是某所小学校的科学博览会,而不是在美国工业界的一家偶像级企业。但是简单明了正是其要点所在。确定比弗克里克工厂的布局是件很复杂的事:这家经过改造的工厂是去年投产的。

关键词：通用电气公司克里克记号笔美国工业界喷气发动机俄亥俄州生产步骤小学校

decomposition mechanisms of nuclear-grade cationic exchange resin by advanced oxidation processes:Statistical molecular fragmentation model and dFT calculations

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Journal of Environmental Sciences 2024年第1期135卷 433-448页

作者： Xiang Meng Pierre désesquelles Lejin Xu department of Nuclear Engineering and Technology School of Energy and Power EngineeringHuazhong University of Science&TechnologyWuhan 430074China CNRS Laboratoire de Physique des Gaz et des PlasmasUniversitéParis-SaclayOrsay 91405France State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The treatment and disposal of radioactive waste are presently facing great *** ion exchange resins have become a focus of attention due to their high production and serious environmental *** this paper,a simplified model of cationic exchange resin is proposed,and the degradation processes of cationic resin monomer initiated by hydroxyl radicals(·OH)are clarified by combining statistical molecular fragmentation(SMF)model and density functional theory(dFT)*** prediction of active sites indicates that the S-O bonds and the C-S bond of the sulfonic group are more likely to react during the *** meta-position of the sulfonic group on the benzene ring is the most active site,and the benzene ring without the sulfonic group has a certain *** C11-C14 and C17-C20 bonds,on the carbon skeleton,are the most easily *** is also found that dihydroxy addition and elimination reactions play a major role in the process of desulfonation,carbon skeleton cleavage and benzene ring *** decomposition mechanisms found through the combination of physical models and chemical calculations,provide theoretical guidance for the treatment of complex polycyclic aromatic hydrocarbons.

关键词： Cationic exchange resin Statistical molecular fragmentation model density functional theory Hydroxyl radical decomposition mechanism

Role of pituitary adenylate cyclase-activating polypeptide in peripheral nerve regeneration:a cellular and molecular perspective

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Neural Regeneration Research 2024年第7期19卷 1429-1430页

作者： Grazia Maugeri Velia d’Agata Section of Anatomy Histology and Movement SciencesDepartment of Biomedical and Biotechnological SciencesUniversity of CataniaCataniaItaly

Neuro regeneration is a very complex phenomenon characterized by the generation of new neurons and synapses,involving connections between adjacent cells and axonal *** supplies additional longterm resources to replace... 详细信息

关键词： replace functional regeneration

Process engineering of demineralisation of moderate to high ash Indian coals through NaOH‑HCl leaching and HF leaching

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International Journal of Coal Science & Technology 2024年第2期11卷 111-122页

作者： Heena dhawan d.K.Sharma ANRF Ministry of ScienceNew DelhiIndia department of Energy Science and Engineering Indian Institute of Technology DelhiNew Delhi 110016India

Chemical leaching of coals would be required to produce cleaner coals for some special applications where physical benefi-ciation may not be effective *** would also help in recovering Li and rare earth metals besides in the sequestration of CO_(2).About 20 Indian coals having complexly distributed moderate to high ash contents were sequentially treated with various alkali–acid such as NaOH-HCl,HF,HCl,HCl-HF,and NaOH-HCl-HF *** aimed to establish and design the best stepwise sequential process for the highest degree of demineralisation through a chemical leaching *** and process intensification studies were carried *** than 80%demineralisation of Madhaipur and Neemcha coals was observed using the best sequential treatment designed *** repeated stepwise treatment of the alkali and the acid was also studied,which was found to significantly enhance the degree of demineralisation of *** integrated process of alkali–acid leaching followed by solvent extraction(Organo-refining)and vice versa of the treated coal was also studied for producing cleaner coals.

关键词： Alkali–acid leaching demineralisation Integrated process Rare earth elements