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Journal of Advanced Ceramics 2021年第3期10卷 627-635页

作者： Jing YAN Yanling wang chun-ming wang Jun OUYANG Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Institute of Advanced Energy Materials and Chemistry School of Chemistry and Chemical EngineeringShandong Provincial Key Laboratory of Molecular EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China College of Physics and Electronic Engineering Qilu Normal UniversityJinan 250013China Amperex Technology Limited Ningde 352100China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100China

CaBi_(2)Nb_(2)O_(9) thin film capacitors were fabricated on SrRuO_(3)-buffered Pt(111)/Ti/Si(100)substrates by adopting a two-step fabrication *** process combines a low-temperature sputtering deposition with a rapid thermal annealing(RTA)to inhibit the grain growth,for the purposes of delaying the polarization saturation and reducing the ferroelectric *** using this method,CaBi_(2)Nb_(2)O_(9) thin films with uniformly distributed nanograins were obtained,which display a large recyclable energy density Wrec≈69 J/cm^(3) and a high energy efficiencyη≈82.4%.A superior fatigue-resistance(negligible energy performance degradation after 10^(9) charge-discharge cycles)and a good thermal stability(from-170 to 150℃)have also been *** two-step method can be used to prepare other bismuth layer-structured ferroelectric film capacitors with enhanced energy storage performances.

关键词： bismuth layer-structured ferroelectrics(BLSFs) calcium bismuth niobate(CaBi_(2)Nb_(2)O_(9)) nanograin films rapid thermal annealing(RTA) energy storage fatigue-resistance

Reoxidation process and corrosion behavior of TA15 alloy by laser ablation

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Rare Metals 2021年第4期40卷 865-876页

作者： Bo-Wen Liu Gao-Yang Mi chun-ming wang School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

The thermal oxide layer formed of TA15 alloy has poor corrosion *** this paper,the changes of the elements and components on the surface after laser ablation with different energy densities(E) were *** formation process and corrosion behavior of laser-generated oxide layer were *** E increases,the oxygen content decreases from 8.52% to 5.43% and then increases to 11.89%.The surface oxide layer changes from TiO_(2)(R)(i.e.,rutile) to Ti_(2) O_(3)+TiO_(2)(R) and finally becomes TiO_(2)(R)+TiO_(2)(A)(i.e.,anatase).The TiO_(2)(R) gasification was confirmed by calculating the surface temperature *** surface reoxidation process was illustrated by a thermodynamically calculated ΔGT(i.e.,the Gibbs free energy changes with temperature).When E≥17.5 J·cm^(-2),the oxide layer exhibits an agitated morphology,and oxide falls off at the *** E increases,the corrosion rate decreases first and then *** energy density of 8.75 J·cm^(-2),the surface corrosion rate was 20.43 times slower than that of the untreated *** impedance spectrum and equivalent resistance results also prove the best corrosion resistance at 8.75 J·cm^(-2).The corrosion behavior of the oxide layer is analyzed from the properties of the oxide layer components and the reaction products with the electrolyte.

关键词： Laser ablation TA15 alloy Reoxidation process Corrosion behavior Elemental analysis

Reproductive Allocation Patterns in Different Density Populations of Spring Wheat

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Journal of Integrative Plant Biology 2008年第2期50卷 141-146页

作者： Jing Liu Gen-Xuan wang Liang Wei chun-ming wang Key Laboratory of And and Grassland Agroecology at Lanzhou University Ministry of Education Lanzhou 730000 China Coflege of Life Sciences Zhejiang University Hangzhou 310027 China Institute of Modem Physics the Chinese Academy of Sciences Lanzhou 730000 China

The effects of increased intraspecific competition on size hierarchies （size inequality） and reproductive allocation were investigated in populations of the annual plant, spring wheat （Triticurn aestivurn）. A series of densities （100, 300, 1 000, 3 000 and 10 000 plants/m^2） along a gradient of competition intensity were designed in this experiment. The results showed that average shoot biomass decreased with increased density. Reproductive allocation was negatively correlated to Gini coefficient （R^2 = 0.927）, which suggested that reproductive allocation is inclined to decrease as size inequality increases. These results suggest that both vegetative and reproductive structures were significantly affected by intensive competition. However, results also indicated that there were different relationships between plant size and reproductive allocation pattern in different densities. In the lowest density population, lacking competition （100 plants/m^2）, individual reproductive allocation was size independent but, in high density populations （300, 1 000, 3 000 and 10 000 plants/m^2）, where competition occurred, individual reproductive allocation was size dependent： the small proportion of larger individuals were winners in competition and got higher reproductive allocation （lower marginal reproductive allocation; MRA）, and the larger proportion of smaller individuals were suppressed and got lower reproductive allocation （higher MRA）. In conclusion, our results support the prediction that elevated intraspecific competition would result in higher levels of size inequality and decreased reproductive allocation （with a negative relationship between them）. However, deeper analysis indicated that these frequency- and size-dependent reproductive strategies were not evolutionarily stable strategies.

关键词： competition density reproductive allocation.

Hydrogenation behaviors and characteristics of bulk Ti-6Al-4V alloy at different isothermal temperatures

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Rare Metals 2019年第12期38卷 1131-1135页

作者： Long Pan chun-ming wang Su-Fen Xiao Yun-Gui Chen School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China College of Materials Science and Engineering Sichuan UniversityChengdu 610065China

The bulk Ti-6Al-4V alloy was hydrogenated at the temperature range of 723-973 K,and the hydrogen absorption characteristics and hydrogen absorption kinetics were *** results show that there are two types of hydrogen absorption characteristics at different *** hydrogen content decreases,and the time reaching reaction equilibrium is shorten with the isothermal hydrogenation temperature ***,the mechanism of the hydrogen absorption kinetics is different at different *** incubation period exists at the initial hydrogen absorption stage below 823 K,and K(a2)(the reaction rate constant of Stage 2)>>K(a1)(the reaction rate constant of Stage 1).And there is no incubation period over 823 K,K(a1)>>K(a2).

关键词： Bulk Ti-6Al-4V alloy Hydrogen content Hydrogen absorption kinetic Temperature

Effects of metallic microstructures on fatigue fracture of Q345 steel

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Journal of Iron and Steel Research International 2020年第6期27卷 702-709页

作者： Han-qing Liu chun-ming wang Hong Zhang Zhi-yong Huang Qing-yuan wang Qiang Chen School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065SichuanChina Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province Sichuan UniversityChengdu 610065SichuanChina Department of Mechanical Engineering Kyushu UniversityFukuoka 819-0395Japan School of Materials Science and Engineering Jiangxi University of Science and TechnologyGanzhou 341000JiangxiChina

Effects of high-frequency cyclic loading on the banded ferrite-pearlite steel were analyzed through crack initiation and propagation. Interfaces of ferrite and pearlite colony with a small angle deviation from the loading axis were verified to be the most potential sites to fabricate the microcracks caused by the high strain gradient. The initial crack extension inside ferrite grain was driven by shear stress in model II along the direction with a 45° angle to the loading axis. Banded pearlite colony and the high-angle grain boundaries were considered as the dominant factors that promote the fatigue resistance of the material through arousing crack deflection in short crack propagation range and crack branching in long crack propagation range to reduce the crack propagation driving force in the crack tip. P-S-N curves were used to quantify the dispersion of fatigue lifetimes and evaluate the effect of elevated volume content of pearlite colony on the fatigue performance of the material.

关键词： Ferrite-pearlite steel High-cycle fatigue Crack propagation Crack branching High-angle grain boundary P-S-N curve

Effect of Water Deficit on Self-thinning Line in Spring Wheat （Triticum aestivum L.） Populations

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Journal of Integrative Plant Biology 2006年第4期48卷 415-419页

作者： Jing Liu Liang Wei chun-ming wang Gen-Xuan wang Xiao-Ping Wei Key Laboratory of Arid and Grassland Ecology Lanzhou University Ministry of Education Lanzhou 730000 China College of Life Sciences Zhejiang University Hangzhou 310027 China School of Life Sciences Lanzhou University Lanzhou 730000 China

Monocultures of spring wheat （Triticum aestivum L.） were grown at overcrowded densities （10 000 and 3 000 plants per m^2） under well-watered and water-stressed conditions to investigate the effects of water deficits on self-thinning. The results showed that density reduction in water-stressed populations was delayed compared with that In well-watered populations. Populations grown In well-watered conditions conformed to the -3/2- power law. Compared with the well-watered condition, there was no significant decrease of the self-thinning line under water-stressed conditions In this experiment, although the rate of average shoot blomass accumulatlon decreased. This result Implied that the exponent of the -3/2-power equation Is not as sensitive as the rate of average shoot blomass accumulation to water stress. Further analysis indicated that, In each density treatment, the lines of the height versus shoot blomass relationships did not differ significantly between the two water conditions. However, the Intercepts of the height versus shoot blomass relationships were greater In the higher-density populations （10 000/m^2） than those In the lower-density populations （3 000/m^2）. These results showed that water deficit did not change plant geometry In this experiment. That Is to say, shoot competition for light remains constant at a given blomass, although root competition for water becomes more serious In water deficit conditions. Based on these results and previous reports we propose that, to affect the thinning line slope, changes In symmetric competition are not as efficient as changes In asymmetric competition.

关键词： -3/2-power rule competition density self-thinning water deficit.

Photosynthesis and Water Use Efficiency of Platycladus Orientalis and Robinia Pseudoacacia Saplings under Steady Soil Water Stress during Different Stages of Their Annual Growth Period

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Journal of Integrative Plant Biology 2007年第10期49卷 1470-1477页

作者： ming-chun wang Jin-Xin wang Qing-Hua Shi Jin-Song Zhang College of Forestry Northwest A&F University Yangling Shaanxi China712100 College of Resources and Environment Northwest A&F University Yangling Shaanxi China712100 Research Institute of Forestry Chinese Academy of Forestry Beijing China100091

A simulated drought experiment was conducted in a rain-free shed to test the physiological response of Platycladus orientalis and Robinia pseudoacacia saplings to steady soil water stress during different stages. The five soil water treatments were： 100%, 87.84%, 70%, 52.16% and 40% of field capacity. The results showed that the net photosynthetic rate of R. pseudoacacia decreased as soil water potential decreased in the range between -0.041 MPa and -0.292 MPa. The threshold value at which the net photosynthetic rate changed significantly was -0.12 MPa. The relationship between net photosynthetic rate of P. orientalis and soil water potential could be described as a quadratic parabola in the range between -0.041 MPa and -0.648 MPa. Analysis of variance showed significant differences in the net photosynthetic rate of P. orientalis between soil water potentials of -0.061 MPa ~, -0.648 MPa. Average water use efficiency （WUE） increased as soil water potential decreased, but the influence mechanism of soil water stress on leaf WUE and photosynthetic rate for the two species were different evidently.

关键词： growth stages photosynthesis Platycladus onentalis Robinia pseudoacacia sapling steady water stress water use efficiency.

Preeminent energy storage properties and superior stability of(Ba_((1-x))Bi_(x))(Ti_((1-x))Mg_(2 x/3)Ta_(x/3))O_(3)relaxor ferroelectric ceramics via elongated rod-shaped grains and domain structural regulation

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Journal of Materials Science & Technology 2024年第17期184卷 207-220页

作者： ming Yin Ying Zhang Hai-Rui Bai Peng Li Yu-Chao Li Wei-Fang Han Ji-Gong Hao Wei Li chun-ming wang Peng Fu School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252059China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 264006China School of Physics Shandong UniversityJinan 250100China

(Ba_((1-x))Bi_(x))(Ti_((1-x))Mg_(2 x/3)Ta_(x/3))O_(3)(BBTMT-x,x=0.075,0.1,0.125,and 0.15)ceramics were manufactured via a solid-phase reaction *** pseudo-cubic BaTiO_(3)(BT)as the primary phase and Ba_(4)MgTi_(11)O_(27)as the secondary phase were detected in BBTMT-x *** elongated rod-shaped grains therein be-came numerous as x *** introduction of Bi/Mg/Ta(BMT)elements transformed BT ceramics from ferroelectrics to relaxor ferroelectrics and induced the formation of short-range order polar nanore-gions(PNRs),which were beneficial for the preeminent energy storage properties(ESPs).The highest ESPs(a giant recoverable energy-storage density W_(rec) of 5.97 J cm^(-3)with a high-efficiencyηof 87.4%)were achieved in BBTMT-0.1 ceramics at 710 kV cm^(-1).BBTMT-0.1 ceramics also possessed excellent fre-quency(1-500 Hz),temperature(30-150°C),and fatigue(cycle number of 1-100,000)*** element simulations(FES)demonstrated that elongated rod-shaped grains had stronger obstacles to the development of electrical branches,which was beneficial to improving the comprehensive ESPs.

关键词： Ceramics Relaxor ferroelectrics Energy storage Polar nanoregions Stability

Electrochemical study and application on rutin at chitosan/graphene films modified glassy carbon electrode

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Journal of Pharmaceutical Analysis 2013年第2期3卷 102-108页

作者： Jing An Ying-Yan Bi chun-Xia Yang Fang-Di Hu chun-ming wang School of Pharmacy Lanzhou University College of Chemistry and Chemical Engineering Lanzhou University

Graphene（G） was dispersed into 0.5% chitosan（Chit） solution,then the composite films were coated on glassy carbon electrode（GCE）,the electrochemical behavior of rutin on a Chit/G modified GCE was investigated and the electrochemical parameters of rutin were *** effectively accumulated on the Chit/G/GCE and caused a pair of redox peaks at around 408 mV and 482 mV（***） in 0.1M phosphate buffer solution（pH 4.0）.Under optimized conditions,the anodic peak current was linear to the rutin concentration in the range of 5×107-1.04×*** regression equation was：y 9.9219x-0.0025,r=*** proposed method was successfully used for the determination of rutin content in tablet samples with satisfactory results.

关键词： Electrochemical Chitosan/graphene films Differential pulse voltammetry Rutin

Genotyping the Heading Date of Male-Sterile Rice Line II-32A

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Journal of Integrative Plant Biology 2006年第4期48卷 440-446页

作者： Jun-Feng Xu Ling Jiang Xiang-Jin wei Wei-Wen Zhang Shi-Jia Liu Liang-ming Chen chun-ming wang Lin-Guang Luo Jian-Min Wan State Key Laboratory of Crop Genetics and Germplasm Enhancement Research Center of Jiangsu Plant Gene Engineering Nanjing Agricultural University Nanjing 210095 China Jiangxi Academy of Agricultural Science Nanchang 330200 China

II-32A, an elite male-sterile line of rice （Oryza sativa L.）, has been widely used for the production of hybrid rice seed In China. Heading date In most combinations using II-32A shows transgressive Inheritance or similarity to the latter parent, but the genotype of II-32A with respect to major genes for heading time Is unknown. This limits the further exploitation of this sterile line In breeding and hybrid seed production. Using a number of major gene heading date Isogenlc lines and heading date QTL near-lsogenic lines, we genetically analyzed II-32B under both long- and short-day conditions. We show that II-32B carries two photoperlod-sensltlve genes, E1 and E3, a recessive late-heading gene, ef-l, and a photoperlod-sensltlve allele, Se-1^u. In addition we Identified In II- 32B a recessive Inhibitor for E1 or Se-1^n and other modified photoperlod-sensltlve genes. The heading-date constitution of II-32A was determined to be E1e2E3Se-1^uef-li-Se-1.

关键词： heading date near-isogenic line photoperiod-sensitive gene recessive late-heading gene rice.