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| 1 | Microstructure and thermal conductivity of copper matrix composites reinforced with mixtures of diamond and SiC particles显示文摘The thermal conductivity of diamond hybrid SiC/Cu,diamond/Cu and SiC/Cu composite were calculated by using the extended differential effective medium (DEM) theoretical model in this paper.The effects of the particle volume fraction,the particle size and the volume ratio of the diamond particles to the total particles on the thermal conductivity of the composite were studied.The DEM theoretical calculation results show that,for the diamond hybrid SiC/Cu composite,when the particle volume fraction is above 46% and the volume ratio of the diamond particles to the SiC particles is above 13:12,the thermal conductivity of the composite can reach 500 W·m-1·K-1.The thermal conduc-tivity of the composite has little change when the particle size is above 200μm.The experimental results show that Ti can improve the wettability of the SiC and Cu.The thermal conductivity of the diamond hybrid SiCTi/Cu is almost two times better than that of the diamond hybrid SiC/Cu.It is feasible to predict the thermal conductivity of the composite by DEM theoretical model. | Han, Yuanyuan Guo, Hong Yin, Fazhang Zhang, Ximin Chu, Ke Fan, Yeming | 2012 | Rare Metals2012，31，1： | 14 |
| 2 | Investigating the dynamic mechanical behaviors of polyurea through experimentation and modeling显示文摘Polyurea is widely employed as a protective coating in many fields because of its superior ability to improve the anti-blast and anti-impact capability of structures.In this study,the mechanical properties of polyurea XS-350 were investigated via systematic experimentation over a wide range of strain rates(0.001-7000 s^-1)by using an MTS,Instron VHS,and split-Hopkinson bars.The stress-strain behavior of polyurea was obtained for various strain rates,and the effects of strain rate on the primary mechanical properties were analyzed.Additionally,a modified rate-dependent constitutive model is proposed based on the nine-parameter Mooney-Rivlin model.The results show that the stress-strain curves can be divided into three distinct regions:the linear-elastic stage,the highly elastic stage,and an approximate linear region terminating in fracture.The mechanical properties of the polyurea material were found to be highly dependent on the strain rate.Furthermore,a comparison between model predictions and the experimental stress-strain curves demonstrated that the proposed model can characterize the mechanical properties of polyurea over a wide range of strain rates. | Hao Wang Ximin Deng Haijun Wu Aiguo Pi Jinzhu Li Fenglei Huang | 2019 | Defence Technology(防务技术)2019，15，6： | 13 |
| 3 | Interfacial microstructure and properties of diamond/Cu-xCr composites for electronic packaging applications显示文摘Diamond/Cu-xCr composites were fabricated by pressure infiltration process.The thermal conductivities of diamond/Cu-xCr(x = 0.1,0.5,0.8) composites were above 650 W/mK,higher than that of diamond/Cu composites.The tensile strengths ranged from 186 to 225 MPa,and the bonding strengths ranged from 400 to 525 MPa.Influences of Cr element on the thermo-physical properties and interface structures were analyzed.The intermediate layer was confirmed as Cr3C2 and the amount of Cr3C2 increased with the increase of Cr concentration in Cu-xCr alloys.When the Cr concentration was up to 0.5 wt.%,the content of the Cr3C2 layer was constant.As the thickness of the Cr3C2 layer became larger,the composites showed a lower thermal conductivity but higher mechanical properties.The coefficients of thermal expansion(CTE) of diamond/Cu-xCr(x = 0.1,0.5,0.8) composites were in good agreement with the predictions of the Kerner' model. | ZHANG Ximin GUO Hong YIN Fazhang FAN Yeming ZHANG Yongzhong | 2011 | Rare Metals2011，30，1： | 12 |
| 4 | Time-Consistent Investment Strategy for DC Pension Plan with Stochastic Salary Under CEV Model显示文摘This paper aims to derive the time-consistent investment strategy for the defined contribution(DC) pension plan under the mean-variance criterion.The financial market consists of a risk-free asset and a risky asset of which price process satisfies the constant elasticity of variance(CEV) model.Compared with the geometric Brownian motion model,the CEV model has the ability of capturing the implied volatility skew and explaining the volatility smile.The authors assume that the contribution to the pension fund is a constant proportion of the pension member's salary.Meanwhile,the salary is stochastic and its volatility arises from the price process of the risky asset,which makes the proposed model different from most of existing researches and more realistic.In the proposed model,the optimization problem can be decomposed into two sub-problems:Before and after retirement cases.By applying a game theoretic framework and solving extended Hamilton-Jacobi-Bellman(HJB) systems,the authors derive the time-consistent strategies and the corresponding value functions explicitly.Finally,numerical simulations are presented to illustrate the effects of model parameters on the time-consistent strategies. | LI Danping RONG Ximin ZHAO Hui | 2016 | Journal of Systems Science & Complexity2016，29，2： | 8 |
| 5 | Visible-near infrared ultra-broadband polarization-independent metamaterial perfect absorber involving phase-change materials显示文摘We numerically demonstrate a novel ultra-broadband polarization-independent metamaterial perfect absorber in the visible and near-infrared region involving the phase-change material Ge_2Sb_2Te_5(GST).The novel perfect absorber scheme consists of an array of high-index strong-absorbance GST square resonators separated from a continuous Au substrate by a low-index lossless dielectric layer(silica)and a high-index GST planar cavity.Three absorption peaks with the maximal absorbance up to 99.94% are achieved,owing to the excitation of plasmon-like dipolar or quadrupole resonances from the high-index GST resonators and cavity resonances generated by the GST planar cavity.The intensities and positions of the absorption peaks show strong dependence on structural parameters.A heat transfer model is used to investigate the temporal variation of temperature within the GST region.The results show that the temperature of amorphous GST can reach up to 433 K of the phase transition temperature from room temperature in just 0.37 ns with a relatively low incident light intensity of 1.11×10~8W∕m^2,due to the enhanced ultra-broadband light absorbance through strong plasmon resonances and cavity resonance in the absorber.The study suggests a feasible means to lower the power requirements for photonic devices based on a thermal phase change via engineering ultra-broadband light absorbers. | Ximin Tian Zhi-Yuan Li | 2016 | Photonics Research2016，4，4： | 5 |
| 6 | Superhydrophobic Flexible Supercapacitors Formed by Integrating Hydrogel with Functional Carbon Nanomaterials显示文摘With the rapid development of the wearable electronics,the flexible supercapacitor with high energy density has attracted more and more attentions.From the viewpoint of outdoor and underwater application,this research tried to impart the superhydrophobicity to the flexible supercapacitors.The polyvinyl alcohol/HN0_(3) hydrogel was utilized as the electrolyte,which could achieve self-healing capability without the freezing/thawing process.Both microscale graphene and nanoscale carbon nanotubes were utilized as the electrode materials.After surface modification,the hydrophobic suspension composed of graphene and carbon nanotubes was sprayed onto the two sides of hydrogel electrolyte to construct superhydrophobic electrode.Hence,the superhydrophobicity endows the supercapacitor with outstanding self-cleaning performance.The all-in-one structure endows the supercapacitor with improved capacitive ability,outstanding flexibility,good anti-abrasion property,and reliable self-healing capability.The combination of superhydro-phobicity and flexible energy storage might have a broad application for the outdoor and underwater wearable electronics applications. | Peng Wang Ximin Zhang Wei Duan Wei Teng Yibing Liu Qing Xie | 2021 | Chinese Journal of Chemistry2021，39，5： | 4 |
| 7 | The structure of erastin-bound xCT-4F2hc complex reveals molecular mechanisms underlying erastin-induced ferroptosis显示文摘Dear Editor,Ferroptosis is an iron-dependent,non-apoptotic form of regulated cell death characterized by an accumulation of lipid.derived reactive oxygen species(ROS).The small-molecule compo und erastin in duces ferroptosis via in hibiti ng the cystineglutamate antiporter system x_(c).which consists of two subunits,namely the light chain xCT and the heavy chain 4F2hc(encoded by the SLC7A11 and SLC3A2 genes,respectively).^(1-4) | Renhong Yan Enjun Xie Yaning Li Jin Li Yuanyuan Zhang Ximin Chi Xueping Hu Lei xu Tingjun Hou Brent R.Stockwell Junxia Min Qiang Zhou Fudi Wang | 2022 | Cell Research2022，32，7： | 4 |
| 8 | Residual stress evolution regularity in thermal barrier coatings under thermal shock loading显示文摘Residual stress evolution regularity in thermal barrier ceramic coatings(TBCs) under different cycles of thermal shock loading of 1 100℃ was investigated by the microscopic digital image correlation(DIC) and micro-Raman spectroscopy, respectively. The obtained results showed that, as the cycle number of the thermal shock loading increases, the evolution of the residual stress undergoes three distinct stages: a sharp increase, a gradual change, and a reduction.The extension stress near the TBC surface is fast transformed to compressive one through just one thermal cycle. After different thermal shock cycles with peak temperature of 1 100℃, phase transformation in TBC does not happen, whereas the generation, development, evolution of the thermally grown oxide(TGO) layer and micro-cracks are the main reasons causing the evolution regularity of the residual stress. | Ximin Chen Zhanwei Liu Yang Yang | 2014 | Theoretical & Applied Mechanics Letters2014，4，2： | 4 |
| 9 | Single copper sites dispersed on hierarchically porous carbon for improving oxygen reduction reaction towards zinc-air battery显示文摘The demand for high-performance non-precious-metal electrocatalysts to replace the noble metal-based catalysts for oxygen reduction reaction(ORR)is intensively increasing.Herein,single-atomic copper sites supported on N-doped three-dimensional hierarchically porous carbon catalyst(Cu_(1)/NC)was prepared by coordination pyrolysis strategy.Remarkably,the Cu_(1)/NC-900 catalyst not only exhibits excellent ORR performance with a half-wave potential of 0.894 V(vs.RHE)in alkaline media,outperforming those of commercial Pt/C(0.851 V)and Cu nanoparticles anchored on N-doped porous carbon(CuNPs/NC-900),but also demonstrates high stability and methanol tolerance.Moreover,the Cu_(1)/NC-900 based Zn-air battery exhibits higher power density,rechargeability and cyclic stability than the one based on Pt/C.Both experimental and theoretical investigations demonstrated that the excellent performance of the as-obtained Cu_(1)/NC-900 could be attributed to the synergistic effect between copper coordinated by three N atoms active sites and the neighbouring carbon defect,resulting in elevated Cu d-band centers of Cu atoms and facilitating intermediate desorption for ORR process.This study may lead towards the development of highly efficient non-noble metal catalysts for applications in electrochemical energy conversion. | Wenjie Wu Yan Liu Dong Liu Wenxing Chen Zhaoyi Song Ximin Wang Yamin Zheng Ning Lu Chunxia Wang Junjie Mao Yadong Li | 2021 | Nano Research2021，14，4： | 4 |
| 10 | Characteristics of reactivity and structures of palm kernel shell (PKS) biochar during CO_2/H_2O mixture gasification显示文摘Palm kernel shell(PKS)biochars with different levels of carbon conversion were initially prepared using a tube furnace,after which the reactivity of each sample was assessed with a thermogravimetric analyzer under a CO_2 atmosphere.The pore structure and carbon ordering of each biochar also examined,employing a surface area analyzer and a Raman spectroscopy.Thermogravimetric results showed that the gasification index R_sof the PKS biochar decreased from 0.0305 min^(-1) at carbon conversion(x)=20% to 0.0278 min^(-1)at x=40%.The expansion of micropores was the dominant process during the pore structure evolution,ad mesopores with sizes ranging from 6 to 20,48 to 50 nm were primarily generated during gasification under a CO_2/H_2O mixture.The proportion of amorphous carbon in the PKS biochar decreased significantly as x increased,suggesting that the proportion of ordered carbon was increased during the CO_2/H_2O mixed gasification.A significantly reduced total reaction time was observed when employing a CO_2/intermittent H_2O process along with an 83.46% reduction in the steam feed,compared with the amount required using a CO_2/H_2O atmosphere. | Guozhang Chang Ximin Yan Pengyu Qi Mei An Xiude Hu Qingjie Guo | 2018 | Chinese Journal of Chemical Engineering2018，26，10： | 3 |
| 11 | Online recognition of the multiphase flow regime显示文摘The key reasons that the present method cannot be used to solve the industrial multi- phase flow pattern recognition are clarified firstly. The prerequisite to realize the online recognition is proposed and recognition rules for partial flow pattern are obtained based on the massive experimental data. The standard templates for every flow regime feature are calculated with self-organization cluster algorithm. The multi-sensor data fusion method is proposed to realize the online recognition of multiphase flow regime with the pressure and differential pressure signals, which overcomes the severe influence of fluid flow velocity and the oil fraction on the recognition. The online recognition method is tested in the practice, which has less than 10 percent measurement error. The method takes advantages of high confidence, good fault tolerance and less requirement of single sensor performance. | BAI BoFeng ZHANG ShaoJun ZHAO Liang ZHANG XiMin GUO LieJin | 2008 | Science China(Technological Sciences)2008，51，8： | 2 |
| 12 | Riesz Product Spaces and Representation Theory | Xiong Hongyun Rong Ximin (Department of Mathematics,Tianjin University,Tianjin 300072,China) | 1998 | Acta Mathematica Sinica,English Series1998，14，2： | 2 |
| 13 | Structure sensitive properties of KTP-type crystals显示文摘Adding various dopants during the growth of the parent KTiOPO4 (KTP) crystal has given rise to an extensive series of KTP-type crystals. The doped KTP or KTP-type crystals often have very subtle structural variations from pure KTP crystals. As a result of these structural changes the KTP-type crystals often exhibit different physical properties, which may be referred to as structure sensitive properties. It is possible to fine-tune the nonlinear optical properties of KTP crystals through doping. This results in a broad range of applications for KTP-type crystals. | Zhang Kecong Wang Ximin | 2001 | Chinese Science Bulletin2001，46，24： | 2 |
| 14 | Determination of pKa values of alendronate sodium in aqueous solution by piecewise linear regression based on acid-base potentiometric titration显示文摘As a mono-sodium salt form of alendronic acid,alendronate sodium presents multi-level ionization for the dissociation of its four hydroxyl groups.The dissociation constants of alendronate sodium were determined in this work by studying the piecewise linear relationship between volume of titrant and p H value based on acidbase potentiometric titration reaction.The distribution curves of alendronate sodium were drawn according to the determined p Ka values.There were 4 dissociation constants(pKa_1=2.43,pKa_2=7.55,pKa_3=10.80,pKa_4=11.99,respectively) of alendronate sodium,and 12 existing forms,of which 4 could be ignored,existing in different p H environments. | Jing Ke Hanfei Dou Ximin Zhang Dushimabararezi Serge Uhagaze Xiali Ding Yuming Dong | 2016 | Journal of Pharmaceutical Analysis2016，6，6： | 2 |
| 15 | Structural basis for the different states of the spike protein of SARS-CoV-2 in complex with ACE2显示文摘Dear Editor,Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has become a severe threat to global health.1 The spike(S)protein on the surface of SARS-CoV-2 exploits angiotensin-converting enzyme 2(ACE2)as cellular receptor and mediates the fusion of the viral and the host cell membrane during infection.1,2 The activation of the S protein requires the receptor-binding domain(RBD)binding to the peptidase domain(PD)of ACE2 and the cleavage by host proteases into the N-terminal S1 subunit and the C-terminal S2 subunit.2,3,4 An additional furin cleavage site“RRAR”present in the S1/S2 cleavage region of SARS-CoV-2,which is absent in SARS-CoV that shares about 80%sequence identity with SARS-CoV-2 and caused an epidemic in 2002–2003,might help accelerate the activation of the S protein.S1 consists of the N-terminal domain(NTD),the RBD,subdomain 1 and 2(SD1 and SD2).The RBD adopts two distinct conformations:“up”and“down”.Only the“up”RBD exposes the receptor-binding site.S2,containing the hydrophobic fusion peptide,is responsible for the viral and cell membrane fusion.The molecular mechanism underlying the activation of the S protein of SARS-CoV-2 represents a critical clue for therapeutic development.Here we report the cryo-electron microscopy(cryo-EM)structures of trimeric extracellular domain of the S protein(hereinafter referred to as S)at multiple states and conformations,including the all RBD-locked,activated,S1/S2 trypsin-cleaved,PD of ACE2-bound,and the full-length ACE2-bound states.PD binds to the trimeric S protein with consistent interface,inducing conformational change at adjacent region.The trypsin-digested S protein tends to accommodate more PD molecules.Furthermore,the structure of the S–ACE2–B0AT1 ternary complex indicates that one ACE2 dimer binds two trimeric S proteins simultaneously.These results provide clues for the mechanism of the activation of the S protein of SARS-CoV-2. | Renhong Yan Yuanyuan Zhang Yaning Li Fangfei Ye Yingying Guo Lu Xia Xinyue Zhong Ximin Chi Qiang Zhou | 2021 | Cell Research2021，31，6： | 2 |
| 16 | Optimal Investment Problem for an Insurer and a Reinsurer显示文摘This paper studies the optimal investment problem for an insurer and a reinsurer. The basic claim process is assumed to follow a Brownian motion with drift and the insurer can purchase proportional reinsurance from the reinsurer. The insurer and the reinsurer are allowed to invest in a risk-free asset and a risky asset. Moreover, the authors consider the correlation between the claim process and the price process of the risky asset. The authors ?rst study the optimization problem of maximizing the expected exponential utility of terminal wealth for the insurer. Then with the optimal reinsurance strategy chosen by the insurer, the authors consider two optimization problems for the reinsurer: The problem of maximizing the expected exponential utility of terminal wealth and the problem of minimizing the ruin probability. By solving the corresponding Hamilton-Jacobi-Bellman equations, the authors derive the optimal reinsurance and investment strategies, explicitly. Finally, the authors illustrate the equality of the reinsurer's optimal investment strategies under the two cases. | LI Danping RONG Ximin ZHAO Hui | 2015 | Journal of Systems Science & Complexity2015，28，6： | 2 |
| 17 | Epidemic status of Angiostrongylus cantonensis in Hainan island,China显示文摘Objective:To understand the current epidemiological status of Angiostrongylus cantonensis in Hainan island and provide the scientific evidences for prevention and control of the disease.Methods:The investigation on nature infection condition of intermediate hosts and final hosts of Angiostrongylus cantonensis were carried out in five counties,Hainan Province, and enzyme linked immunosorbent assay(ELISA) was employed to detect antibodies of Angiostrongylus cantonensis in human hosts.Results:A total of 1 612 molluscs were examined, 21.3%of which harbored L3 of Angiostrongylus cantonensis.Among them,the infection rates of Pomacea canaliculata,Achatina fulica,Cepaea and Phlegm bilineatus were 12.3696(64/518), 22.66%(121/534),20.93%(9/43),and 28.24%(146/517),respectively.Of the 118 rats trapped,13 Rattus norvegicus were found to be infected with Angiostrongylus cantonensis.A total of 459 serum samples were collected and tested.92 serum samples were Angiostrongylus cantonensis antibody-positive.Conclusions:The survey revealed a wide distribution of Angiostrongylus cantonensis in Hainan island.Pomacea canaUculata and Achatina fulica are main intermediate hosts of Angiostrongylus cantonensis.Rattus novegicus is a nature definitive host,indicating that a considerable number of people are at risk of angiostrongyliasis.Health education,rigorous food inspection and surveillance are all needed to prevent angiostrongyliasis outbreaks in future. | Ximin Hu Jianwei Du Chongjin Tong Shanqing Wang Jian Liu Yuchun Li Changhua He | 2011 | Asian Pacific Journal of Tropical Medicine2011，4，4： | 2 |
| 18 | Identification of two aberrant transcripts derived from a hybridoma with amplification of functional immunoglobulin variable genes显示文摘Murine monoclonal antibodies(mAbs)are widely used but have limitations if administered in humans.The use of chimeric or humanized mAbs can reduce immunogenicity.The first step in producing such mAbs is to clone murine variable genes from a hybridoma,but it is possible to amplify both functional and aberrant variable genes,as they coexist in the hybridoma.During the development of a murine–human chimeric antibody,we have cloned from a hybridoma the functional heavy chain variable region(VH)and light chain variable region(VL)genes of a mAb that blocks the binding of anthrax lethal factor to protective antigen.In this study,we report the detection of two aberrant transcripts from a hybridoma produced using myeloma cell line OUR-1,the development of a method to distinguish between the functional and abundant aberrant VL transcripts,and the origins of these aberrant genes.The aberrant VL gene is derived from OUR-1 cells,while the aberrant VH gene might derive from antibody repertoires in B cells or from gene rearrangement in the hybridoma cells.The aberrant VH and VL genes in this study may facilitate discrimination between the functional and aberrant variable genes from hybridoma cells. | Guipeng Ding Ximin Chen Jin Zhu Brian Cao | 2010 | Cellular & Molecular Immunology2010，7，5： | 2 |
| 19 | Image retrieval based on color distribution entropy显示文摘 | Junding Sun Ximin Zhang Jiangtao Cui Lihua Zhou | 2006 | Pattern Recognition Letters2006，，10： | 2 |
| 20 | Prediction of progressive surface subsidence above Iongwall coal mining using a time function显示文摘 | Cui Ximin | 2001 | International Journal of Rock Mechanics & Mining Sciences2001，38，： | 1 |
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