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Dynamic Monte Carlo Simulation on Polymerization of Encapsulant

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Chinese Journal of Polymer Science 2019年第2期37卷 157-163页

作者： Jin Chen Jiong-hua xiang Department of Physics Research Institute for Soft Matter and Biominetics Xiamen University Department of Chemical Engineering Shanghai Jiao Tong University

Based on the preparative experiments of the light-emitting diode(LED) encapsulant, three types of monomer models with different functional groups are carried out to study the polymerization process by dynamic Monte Carlo(DMC) simulation and bond fluctuation model(BFM). We calculate the degree of polymerization, the radius of gyration and the frequency of void spheres to discuss the polymerization process, the molecular size and the spatial distribution at different volume fractions and proportions. Our results are in agreement with Grest's decay rate and Flory's scale law. Simulations show that the polymerization process depends on the appropriate volume fraction and proportion exceedingly, and the volume contraction in the polymerization process can also be observed in this *** investigations could provide some insights into the understanding of the polymerization process of the encapsulant and help us to adjust the parameters in later experiments.

关键词： Dynamic Monte Carlo(DMC)simulation Bond fluctuation model(BFM) LED encapsulant

Prospects for Variable Gauge Rolling:Technology,Theory and Application

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Journal of Iron and Steel Research International 2011年第1期18卷 1-7页

作者： LIU xiang-hua Northeastern University Shenyang 110004 Liaoning China

Variable gauge rolling （VGR） is a new technology to produce flat products with different thicknesses （FDT）, which could be used to replace conventional fiat products in order to save metals and reduce structure mass. The method of VGR was introduced for investigating new problems in rolling theory of VGR, and the new formulas for calculating parameters of VGR were proposed. Besides, some results of numerical simulation by finite elemen~ method were described. As an example, the products applications of FDT in bridge construction, ship building and auto manufacturing were presented. Finally, the prospects for VGR and FDT were discussed.

关键词： variable gauge rolling longitudinal profile plate tailor rolled blank

Total duration of negative surplus for a MAP risk model

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Applied Mathematics(A Journal of Chinese Universities) 2015年第4期30卷 397-406页

作者： DONG hua ZHAO xiang-hua School of Statistics Qufu Normal University

In this paper, we study the risk model with Markovian arrivals where we allow the surplus process to continue if the surplus falls below zero. We first derive expressions for the severity of ruin. Then by using the strong Markovian property of a two-dimensional Markov process and the expression for the severity of ruin, we obtain the Laplace transform of the total duration of negative surplus.

关键词： total duration of negative surplus Markovian arrival process deficit.

Modern methods of underground hydromechanics with applications to reservoir engineering

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Journal of Hydrodynamics 2016年第6期28卷 937-946页

作者： hua xiang Valery V.KADET Department of Petroleum and Underground Hydromechanics Gubkin Russian State University of Oil and Gas

In the report the basic principles of new approach to the study of transport processes in porous medium are represented. The ＂percolation＂ approach has arisen as an attempt to overcome the traditional phenomenological approach in the underground hydromechanics, based on the assumption of continuity of saturated porous media, which does not allow to explain and to model a number of effects arising from the fluids flow in porous media. The results obtained are very interesting not only from the scientific point of view but as the scientific basis for a number of enhanced oil recovery technologies.

关键词： fluid flow in porous media percolation theory relative phase permeability oil field development low salinity waterflooding

Cultural Exploration into Differences of Chinese and American Family Values

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学术界 2014年第12期 267-272页

作者： xiang hua School of Education Xi’an University

Chinese and American family values,marital views,educational mode,family ethics,and profit distributions have their own special characteristics. In this paper,the differences in values are discussed from the cultural dimension so as to provide a reference to form a core concept for the values difference,correctly treat and judge Sino- American family values and seek a developmental tendency for family values in the cultural conflict.

关键词： China the United States family values differences

Phase equilibrium modeling of zircon stability in mantle peridotite:Implication for crust-mantle interaction

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Science China Earth Sciences 2022年第2期65卷 282-298页

作者： hua xiang Jianping ZHENG Yibing LI Zeming ZHANG Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China School of Earth Sciences State Key Laboratory of Geological Processes and Mineral ResourcesChina University of GeosciencesWuhan 430074China

Zircon is a common accessory mineral in various rocks,especially in the crustal *** is the best mineral for U-Pb ***,trace elements and isotopes of the mineral can also provide much information concerning the formation and evolution of *** are a growing number of reports of zircon existing in mantle ***,it is generally considered that zircon is unlikely crystallized in ultrabasic rocks due to SiO_(2)-*** this paper,the SiO_(2) activity and zircon/baddeleyite transition curve at different conditions were calculated through thermodynamic phase equilibrium modeling,to reveal the main factors affecting the SiO_(2) activity and the stability of zircon/baddeleyite in ultrabasic and basic rocks,especially in mantle *** results provide a thermodynamic basis for interpreting the genesis and significance of zircon in mantle *** is,the SiO_(2) activity is mainly controlled by stable mineral assemblages and temperature-pressure *** orthopyroxene+olivine assemblage in peridotite as an effective buffer restricts the SiO_(2) activity in a relatively high range with a small *** upper temperature limit of zircon can reach more than 1500℃ with this mineral *** the low-temperature serpentinization of peridotite,the replacement of olivine and pyroxene by serpentine can result in a significant decrease of SiO_(2) activity,and baddeleyite can be stabilized at<530℃ and<2.7 *** peridotite is strongly metasomatized by the SiO_(2)-bearing fluid,the addition of SiO_(2) can increase its activity and make zircon stable at low *** SiO_(2) activity in ultrabasic-basic rocks is not only positively correlated with the SiO_(2) content but also negatively correlated with the Ca and Na contents of *** is because Ca and Na preferentially combine with Si and Al to form Si-rich minerals,such as clinopyroxene and *** process will consume excessive SiO_(2),decreasing

关键词： Zircon Baddeleyite Phase equilibrium modeling Mantle peridotite Ultrabasic rock

The Gerber-Shiu Expected Discounted Penalty Function for Lévy Insurance Risk Processes

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Acta Mathematicae Applicatae Sinica 2010年第4期26卷 575-586页

作者： xiang-hua Zhao Chuan-cun Yin School of Mathematical Sciences Qufu Normal UniversityQufu 273165China

In this paper,we study a general Lévy risk process with positive and negative jumps.A renewal equation and an infinite series expression are obtained for the expected discounted penalty function of this risk *** also... 详细信息

关键词： Lévy process Gerber-Shiu expected discounted penalty function renewal equation time of ruin

Positive Solutions Bifurcating from Zero Solution in a Lotka-Volterra Competitive System with Cross-Diffusion Effects

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Applied Mathematics(A Journal of Chinese Universities) 2011年第3期26卷 342-352页

作者： ZHANG Cun-hua YAN xiang-ping Department of Mathematics Lanzhou Jiaotong University Lanzhou 730070 China

A strongly coupled elliptic system under the homogeneous Dirichlet boundary condition denoting the steady-state system of the Lotka-Volterra two-species competitive system with cross-diffusion effects is considered. By using the implicit function theorem and the Lyapunov- Schmidt reduction method, the existence of the positive solutions bifurcating from the trivial solution is obtained. Furthermore, the stability of the bifurcating positive solutions is also investigated by analyzing the associated characteristic equation.

关键词： Lotka-Volterra competitive system Cross-Diffusion Positive solution Steady state bifurcation Stability.

CTP synthase forms cytoophidia in archaea

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Journal of Genetics and Genomics 2020年第4期47卷 213-223页

作者： Shuang Zhou hua xiang Ji-Long Liu School of Life Science and Technology ShanghaiTech UniversityShanghai201210China University of Chinese Academy of Sciences Beijing100049China Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai200031China State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing100101China

CTP synthase(CTPS)is an important metabolic enzyme that catalyzes the rate-Iimiting reaction of nucleotide CrP de novo *** 2010,a series of studies have demonstrated that CTPS can form filamentous structures in bacteria and eukaryotes,which are termed ***,it is unknown whether cytoophidia exist in the third domain of life,*** Haloarcula hispanica as a model system,here we demonstrate that CTPS forms distinct intracellular compartments in *** stimulated emission depletion microscopy,we find that the structures of *** CTPS are elongated,similar to cytoophidia in bacteria and *** Haloarcula cells are cultured in lowsalt medium,the occurrence of cytoophidia increases *** addition,treatment of *** with a glutamine analog or overexpression of CTPS can promote cytoophidium *** study reveals that CTPS can fo rm cytoophidia in all three domains of life,suggesting that forming cytoophidia is an ancient property of CTPS.

关键词： Archaea CTP synthase Cytoophidium Haloarcula hispanica