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CO2 sequestration characteristics in the cementitious material based on gangue backfilling mining method

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International Journal of Mining science and Technology 2019年第5期29卷 721-729页

作者： Peng Wang Xianbiao Mao shen-en Chen school of Mechanics and Civil engineering China University of Mining&TechnologyXuzhou 221116China school of Civil and environmental engineering University of North Carolina at CharlotteCharlotteNC 28262USA

The increasing anthropogenic CO2 emission and global warming has challenged the China and other countries to seek new and better ways to meet the world’s increasing need for energy while reducing greenhouse gas *** overall proposition of this research is to develop a brand-new CO2 physical and chemical sequestration method by using solid waste of coal mining and cementitious material which are widely used for goaf backfilling in coal *** research developed a new testing system(constant temperature pressurized reaction chamber(CTPRC))to study the effects of different initial parameters on mineral carbonation such as different initial water-binder ratio,initial sample porosity and initial carbon dioxide *** experimental results show that the CO2 consumption ratio is 15%,10%and 7%higher with relatively high initial water-binder ratio,initial sample porosity and initial CO2 pressure within 48 *** addition,some physical and chemical evidence was found through the electron microscope scanning and XRD test to further explain the above test *** proposed research will provide critical parameters for optimizing CO2 sequestration capacity in this cementitious backfilling material with forming agent.

关键词： Gangue backfilling Goaf Carbon dioxide sequestration Mineral carbonation Cementious material

New direction for surgery:super minimally invasive surgery

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World Journal of Gastroenterology 2024年第12期30卷 1676-1679页

作者： en-Qiang Linghu Department of Gastroenterology First Medical Center of Chinese PLA General HospitalBeijing 100853China

The top goal of modern medicine is treating disease without destroying organ structures and making patients as healthy as they were before their *** invasive surgery(MIs)has dominated the surgical realm because of its lesser ***,changes in anatomical structures of the body and reconstruction of internal organs or different organs are common after traditional surgery or MIs,decreasing the quality of life of patients ***,I propose a new treatment mode,super MIs(sMIs),which is defined as“curing a disease or lesion which used to be treated by MIs while preserving the integrity of the organs”.In this study,I describe the origin,definition,operative channels,advantages,and future perspectives of sMIs.

关键词： super minimally invasive surgery Minimally invasive surgery Treatment mode Traditional surgery New direction for surgery

On water in nominally anhydrous minerals from mantle peridotites and magmatic rocks

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science China Earth sciences 2016年第6期59卷 1157-1172页

作者： hUI heJiu XU YongJiang PAN Ming'en state Key Laboratory for Ore Deposit Research School of Earth Sciences and Engineering Nanjing University

Trace amount of water associated with the lattice defects of nominally anhydrous minerals （NAMs） can be measured using Fourier transform infrared spectroscopy （FTIR） and secondary ion mass spectrometry （sIMs）. Lots of data on water in NAMs from different lithologies, especially mantle peridotite xenoliths, have been published. The water distribution in olivine from peridotite xenoliths often displays a diffusion profile with high water concentration in the core and low at the rim, which indicates water loss via diffusion during the ascent of host magma. On the other hand, water is homogeneously distributed in pyroxene and its concentration is typically interpreted to represent a mantle value. The water concentration of magma in equilibrium with NAM can be estimated using specific partition coefficient, from which the water content of parental magma and the mantle source can be inferred. The accuracy of this method, however, depends on the selection of appropriate partition coefficient for the system. Using hydrogen isotope compositions and h2O/Ce ratios of mantle NAMs, water source regions can be traced and water heterogeneity can be mapped in the upper mantle. Water plays an important role in the stability of cratonic mantle. The water contents and vertical distribution patterns can be significantly different among different cratonic manties, which may result from different geologic activities. however, the mantle-plume interaction may not necessarily result in significant change of water content in cratonic mantle. The estimation of the water content in the upper mantle is still largely based on geochemical models due to the limitations of data on water in mantle NAMs.

关键词： Nominally anhydrous minerals Fourier transform infrared spectroscopy Craton stability Water in the upper mantle Magma ascent rate Water in magma

synthesis and structure of [Cu(Oh)_2(h_2O)_2(4-C_5h_4N-COOh)_2]

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Chinese Journal of structural Chemistry 2001年第6期20卷 478-480页

作者： ZhONG Zhao-en sUN Dao-Feng south China Medical Apparatus Coorporation Ltd. Tonghe TownTongsha Road 13Guangzhou 510515China state Key Laboratory of structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China

The hydrothermal reaction of isonicotinic acid (4-C5h4N-COOh), Cu(ClO4)(2). 6h(2)O and water at 170 degreesC gave the title compound, [Cu(Oh)(2)(h2O)(2)(4-C5h4N-COOh)(2)] (1), which was analyzed by single-crystal X-ray diffraction, The complex crystallizes in triclinic space group PY with unit cell parameters: a = 6.337(2), b = 6.894(3), c = 9.178(3). alpha = 99.40(3), beta = 105.26(3), gamma 108.17(5)degrees, V = 354.1(2)Angstrom (3), Z = 1, C12h16CuN2O8, M-r = 379.81, D-c = 1.791 Mg/m(3), F(000) 197, mu (MoK alpha) = 1.589 mm(-1). The final R and wR are 0.068 and 0.170 for 1249 observed reflections with I greater than or equal to2 sigma (I). The central copper ion is in a distorted octahedron geometry completed by two nitrogen atoms from carboxylic ligand, two oxygen atoms from hydroxyl groups and two oxygen atoms from coordinated water molecules. The intermolecular hydrogen bonding leads to the formation of a three-dimensional supramolecular structure.

关键词： hydrothermal reaction copper complex intermolecular hydrogen bonding

Layered Textures for Image-Based Rendering

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Journal of Computer science & Technology 2004年第5期19卷 633-642页

作者： Wen-ChengWang Kui-YuLi XinZheng en-huaWu KeyLabofComputerscience InstituteofSoftwareTheChineseAcademyofSciencesBeijing100080P.R.China GraduateschoolofChineseAcademyofsciences Beijing100039.P.R.China DepartmentofComputerandInformationscience FacultyofScienceandTechnologyUniversityofMacauMacaoP.R.China

An extension to texture mapping is given in this paper for improving theefficiency of image-based rendering. For a depth image with an orthogonal displacement at eachpixel, it is decomposed by the displacement into a series of layered textures (LTs) with each onehaving the same displacement for all its texels. Meanwhile, some texels of the layered textures areinterpolated for obtaining a continuous 3D approximation of the model represented in the depthimage. Thus, the plane-to-plane texture mapping can be used to map these layered textures to producenovel views and the advantages can be obtained as follows: accelerating the rendering speed,supporting the 3D surface details and view motion parallax, and avoiding the expensive task ofhole-filling in the rendering stage. Experimental results show the new method can producehigh-quality images and run faster than many famous image-based rendering techniques.

关键词： layered texture texture mapping image-based rendering

Effects of Forging and heat Treatments on the Microstructure and Oxidation Behavior of 316LN stainless steel in high Temperature Water

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Journal of Materials science & Technology 2015年第4期31卷 403-412页

作者： Yueling Guo en-hou han Jianqiu Wang National Center for Materials service safety University of Science and Technology Beijing Key Laboratory of Nuclear Materials and safety Assessment Institute of Metal ResearchChinese Academy of Science

Microstructure of 316 LN stainless steel(ss),including the as-received material and samples processed by solution anneal treatment and stress relief treatment after forging,was characterized by Vickers hardness(hV) testing and electron back scattering diffraction(EBsD).The oxide film formed on samples after immersion in borated and lithiated water at 583.15 K was investigated by scanning electron microscopy(sEM) and X-ray photoelectron spectroscopy(XPs).Results showed that the grain size of samples was largely reduced after *** fraction of coincidence site lattice(CsL) boundaries and lower residual strain were observed in samples with either solution anneal treatment or stress relief *** proportion of CsL boundaries was largely enhanced by solution anneal treatment after forging,due to the recrystallization occurring during solution anneal *** oxide film grown on 316 LNss with solution anneal treatment after forging exhibited more strong protectiveness,as compared to the oxide film grown on samples with stress relief treatment after forging and the oxide film grown on asreceived samples without *** mechanisms of oxidation were then discussed.

关键词： stainless steel Forging Corrosion Residual strain

Time-resolved impact electrochemistry for quantitative measurement of single-nanoparticle reaction kinetics

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Nano Research 2017年第11期10卷 3680-3689页

作者： en Ning saw Markus Kratz Kristina Tschulik Micro-&Nano-Electrochemistry and Centre for Electrochemical sciences(CEs) Ruhr-University BochumBochum D-44780Germany

single-nanoparticle electrochemistry has been established as a tool to characterize various nanomaterials based on the charge passed during their random impact at an *** it is demonstrated that the duration and shape of the resulting current peak can be used to quantify the reaction kinetics on a single-particle *** the chemical rate constant and reaction mechanism for oxidation of single nanoparticles in different electrolytes can be determined directly from the duration of the current signal recorded in high-speed,high-sensitivity current *** 29-nm-sized Ag particles in four different electrolytes as a proof of concept for this general approach,hitherto inaccessible insights into single-particle reactivity are *** comparable rate constants were measured for the four electrolytes at low overpotentials,transport-limited impacts at high overpotentials were found to depend strongly on the type and quantity of anions present in solution.

关键词： single-particle reactivity electrochemical kinetics nano-impact method silver reaction mechanism

Pitting corrosion of a Rare Earth Mg alloy GW93

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Journal of Materials science & Technology 2017年第9期33卷 954-960页

作者： Yingwei song Dayong shan en-hou han Key Laboratory of Nuclear Materials and safety Assessment Institute of Metal ResearchChinese Academy of Sciences

Pitting corrosion of magnesium(Mg) alloys is greatly associated with their microstructure, especially second phases. The second phases in traditional Mg alloys such as AZ91 are electrochemically nobler than Mg matrix, while the second phases in Rare earth(RE) Mg alloy GW93 are more active than Mg matrix. As a result, the pitting corrosion mechanism of Mg alloy GW93 is different from the traditional ones. This paper aims to clarify the pitting corrosion mechanism of Mg alloy GW93 through the studies of Volta potential by scanning Kelvin Probe Force Microscopy(sKPFM), corrosion morphology by scanning Electron Microscope(sEM), and corrosion resistance by electrochemical tests. Results reveal that the pitting corrosion of GW93 includes three stages, first, dissolution of the second phases, followed by corrosion of Mg matrix adjacent to the dissolved second phases, and finally, propagation of corrosion pits along the depth direction of the dissolved second phases. Anodic second phases and enrichment of Clin the thick corrosion product films dominate the propagation of pitting corrosion.

关键词： Mg alloys Pitting corrosion second phases Oxide films

Global production aspirations and internationalization by state-owned enterprises:A Co-evolutionary view of statedriven industrialized economy

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International Journal of Innovation studies 2022年第4期6卷 276-285页

作者： Qingqing Tang en Xie K.s.Reddy Business school University of Shanghai for Science and TechnologyShanghai200093China Advanced Institute of Business Tongji UniversityShanghai200070China school of Management Xi'an Polytechnic UniversityXi'an710043China

The study aims to explore whether internationalization by state-owned enterprises is a curse or blessing in the context of aspirant industrial economies,such as *** do state-owned enterprises'global production aspirations,such as outward foreign direct investment,bring into their home country?To answer this question,this study proposes a unique,co-evolutionary perspective of the state-driven industrialized economy by leveraging insights from economic discoveries such as Adam smith's wealth of nations,David Ricardo's comparative advantage,and Michael Porter's competitive *** view suggests that an outward foreign investment strategy may likely provide state-owned enterprises with access to resources and advanced production technologies,enhance innovation capabilities,gain more competitive advantage,and achieve superior performance,thus leading to spillover effects on their home country's wealth,comparative advantage,and *** study discusses China's grand policies,economic performance,and successful cross-border industrial acquisitions.

关键词： state-owned enterprises Internationalization Outward foreign direct investment Wealth of nations Comparative advantage Competitiveness