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mantle plumes and their record in Earth history

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Episodes 2004年第2期27卷 148-149页

作者： Q.m.peng Dept.ofScienceandTechnology＆InternationalCooperationChinaGeologicalSurvey24 HuangsiStreetBeijing100035CHINA

In recent years, the study of mantle plumeshas become a “hot spot” in earth sciences;enormous papers and data have been published, and many mantle plume-related questions have arisen: Did mantle plumes in the Precambrian behave the same way as they do today? What are the roles of plumes in the evolution of the earth? What are the effects of mantle plumes on global changes and metallogenesis? These issues are frequently encountered and hotly debated in a wide range of earth science fields such as tectonics geochemistry, geophysics, metallogenesis,

关键词：地球历史记录热点地球科学前寒武纪

An Inferential Account of Counterfactual Thinking

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An Inferential Account of Counterfactual Thinking

Formation and Dissociation of Bamboo-like ErD_2/ErD_3 Grains

第二届海峡两岸逻辑教学学术会议

作者： Eric m．peng 东吴大学哲学系

*** Some people take an alethic interpretation of *** think that counterfactuals are truth *** are certainly competing *** example,there are people proposing an epistemic ap- *** think that counterfactuals have,instea...

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Journal of materials Science & Technology 2013年第11期29卷 1101-1103页

作者： J.H.Liang H.H.Shen S.m.peng X.G.Long X.S.Zhou L.Yang X.T.Zu Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics School of Physical Electronics University of Electronic Science and Technology of China

The formation and dissociation of Er deuteride grains were investigated by using scanning electron microscopy, in-situ X-ray diffraction and thermal desorption spectroscopy. Pure Er film shows classic columnar structure, while the Er deuteride film was observed as bamboo-like morphology. The in-situ X-ray diffraction results demonstrate that the diffraction peaks of 27.39°, 28.43°, 31.71°, and 39.95° are ascribed to the crystal planes of （002）, （110）, （111）, and （112） of ErD3 phase, respectively. It is also confirmed that by in-situ X-ray diffraction technique, ErD3 grains would be dissociated at temperature exceeding 400 ℃. This result is consistent with the conclusion obtained by thermal desorption spectroscopy.

关键词： Erbium deuteride Bamboo-like morphology ErD3 Phase transformation X-ray diffraction

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UNCONSTRAINED mETHODS F0R GENERALIZED NONLINEAR COmPLEmENTARITY AND VARIATIONAL INEQUALITY PROBLEmS

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Journal of Computational mathematics 1996年第2期14卷 99-107页

作者： J.m. peng(LSEC Institute of Computational mathematics and Scientific/Engineering Cmputing,Chinese Academy of Sciences, Beijing, China)

In this papert we construct unconstrained methods for the generalized nonlinearcomplementarity problem and variational inequalities. Properties of the correspon-dent unconstrained optimization problem are studied. We apply these methods tothe subproblems in trust region method, and study their interrelationships. Nu-merical results are also presented.

关键词： math UNCONSTRAINED mETHODS F0R GENERALIZED NONLINEAR COmPLEmENTARITY AND VARIATIONAL INEQUALITY PROBLEmS

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Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng Gao Yu-Gui peng peng Wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order m?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

microstructures and mechanical properties of friction stir processed mge2.0Nde0.3Zne1.0Zr magnesium alloy

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Journal of magnesium and Alloys 2013年第2期1卷 122-127页

作者： F.Y.Zheng Y.J.Wu L.m.peng X.W.Li P.H.Fu W.J.Ding National Engineering Research Center of Light Alloy Net Forming Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China The State Key Laboratory of metal matrix Composites Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China

The effect of Friction stir process(FSP)parameters on the microstructure and mechanical properties of an extruded mge2.0Nde0.3Zne1.0Zr(wt.%)alloy was investigated in this *** alloy was friction stir processed with different passes:single-pass,three-pass and five-pass,under a tool rotation rate of 800μm and a traverse speed of 200 mm min^(-1).FSP results in remarkable grain refinement of the extruded alloy(average grain size w3.8 mm as 3 passes)and almost complete dissolution of the mg_(12)Nd phase in the *** the increase of pass,the average grain size in the stir zone(SZ)is decreased firstly and then *** Vikers hardness of SZs in all FSPed samples is higher than that of the parent material(Pm).Tensile tests at room-temperature show that the tensile strengths of the stir zones along the FSP advancing direction are slightly lower than those of ***,the elongations are remarkably improved from 13.0%for Pm to 24.5%for SZ FSPed with *** improved tensile properties are attributed to the microstructure refinement,dynamic recrystallization and dissolution of the mg_(12)Nd phase.

关键词： mg-Nd-Zn-Zr alloy Friction stir processing Grain refinement Dynamic recrystallization

A multi-Objective Particle Swarm Optimization Algorithm Based on Decomposition and multi-Selection Strategy

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Computers, materials & Continua 2025年第1期82卷 997-1026页

作者： Li ma Cai Dai Xingsi Xue Cheng peng School of Computer Science Shaanxi Normal UniversityXi’an710119China Fujian Provincial Key Laboratory of Big Data mining and Applications Fujian University of TechnologyFuzhou350118China Information Construction and management Center and Institute of Artificial Intelligence and Educational New Productivity Ningxia Normal UniversityGuyuan756099China

The multi-objective particle swarm optimization algorithm(mOPSO)is widely used to solve multi-objective optimization *** the article,amulti-objective particle swarm optimization algorithmbased on decomposition and multi-selection strategy is proposed to improve the search ***,two update strategies based on decomposition are used to update the evolving population and external archive,***,a multiselection strategy is *** first strategy is for the subspace without a non-dominated *** the neighbor particles,the particle with the smallest penalty-based boundary intersection value is selected as the global optimal solution and the particle far away fromthe search particle and the global optimal solution is selected as the personal optimal solution to enhance global *** second strategy is for the subspace with a non-dominated *** the neighbor particles,two particles are randomly selected,one as the global optimal solution and the other as the personal optimal solution,to enhance local *** third strategy is for Pareto optimal front(PF)discontinuity,which is identified by the cumulative number of iterations of the subspace without non-dominated *** the subsequent iteration,a new probability distribution is used to select from the remaining subspaces to ***,an adaptive inertia weight update strategy based on the dominated degree is designed to further improve the search ***,the proposed algorithmis compared with fivemulti-objective particle swarm optimization algorithms and five multi-objective evolutionary algorithms on 22 test *** results show that the proposed algorithm has better performance.

关键词： multi-objective optimization multi-objective particle swarm optimization decomposition multi-selection strategy

Experimental Research on a Feasible Building Insulation material Based Reed in China

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Journal of Thermal Science 2025年第1期34卷 176-187页

作者： LIU Tiantian peng Yizhe LIU Lifang CAI Chenghan WANG Shuang LI Hongqiang College of Civil Engineering Hunan University College of Civil Engineering Hunan University of Science and Technology School of Energy and Power Jiangsu University of Science and Technology National Center for International Research Collaboration in Building Safety and Environment (NCIRCBSE) Hunan University Key Laboratory of Building Safety and Energy Efficiency of the ministry of Education Hunan University

The seemingly useless reeds are prepared as thermal insulation materials,which not only meet the requirements of environmental sustainability but also enhance the added value of reeds,creating new economic *** hydrophobicity of raw biomass surfaces leads to problems such as weak bonding strength and non-dense structure in the formed materials,as well as issues related to the residual insect infestations on the *** this study,reed straw was used as the raw material,and foamed geopolymer was used as the binder to prepare building insulation materials based *** improve the interfacial adhesion performance between reed straw and foamed geopolymer,a thermochemical modification method-thermal carbonization,was *** this study,the mechanical properties and hydraulic properties of the studied materials with different degrees of surface thermal modification were tested,especially the fire resistance performance,and weathering resistance performance rarely found in published *** the surface thermal modification condition of reed straw was 250℃（30 min）,the comprehensive performance of reed-based building insulation materials was the best,when the studied material density was 321.3 kg/m3;the compressive strength was 0.59 mPa;the thermal conductivity was 0.101 W/（m·K）;the pH was 11.27;the moisture absorption rate was 25.1%,and the compressive strength loss rate in wet-dry cycles was 18.5%.In addition,it had excellent fire resistance performance and weathering resistance *** new material can be widely used to improve the thermal insulation of traditional buildings and as sandwich filler in prefabricated buildings,such as preparing insulating walls.

关键词： building insulation material based reed fire resistance performance interface adhesion properties pre-treatment of reeds weathering resistance performance

ON THE BINDING ENERGIES OF THE ATOmIC NUCLEI ~2H, ~3H, ~3He and ~4He PART I.

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中国物理学报 1950年第1期 316-323页

作者： H. W. peng AND m. Y. TANGDepartment of Physics, National University of Yunnan, Kunming

The binding energies of the atomic nuelei ~2H,~3H,~3He and ~4He are obtained by meansof the variational method,using as a basis the mφller-Rosenfeld nuclear potential.A simplechoice of the wave function renders the calculation *** with experimentalresults is good,except that the binding energy obtained for ~4He is excessive,which indicatesthe necessity of further improving upon the nuclear potential.

关键词： PART I and ON THE BINDING ENERGIES OF THE ATOmIC NUCLEI