oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 190 )

2018 ( 5365 )

2017 ( 5142 )

2016 ( 5131 )

Custom range...

Search Results: 1 - 10 of 301237 matches for " 张新胜<br>GUO Wen-jun "
All listed articles are free for downloading (OA Articles)
Page 1 /301237
Display every page Item
脉冲电沉积抑制锂枝晶生成的研究
A Study of Pulse Electrodeposition on Suppressing the Formation of Lithium Dendrite

郭文君,李紫琼,柯若昊,钮东方,徐衡,张新<br>GUO Wen-jun, LI Zi-qiong, KE Ruo-hao, NIU Dong-fang, XU Heng, ZHANG Xin-sheng
- , 2018, DOI: 10.13208/j.electrochem.170503
Abstract: 摘要 采用脉冲充电方法替代传统充电方法,研究了在有机电解液 0.5 mol·L-1 LiBr/PC (碳酸丙烯酯)中,在铜电极上沉积锂的表面变化. 扫描电镜观测结果显示,在传统直流充电时电极表面明显地出现了枝晶,而使用脉冲充电时能够抑制枝晶的生长. 交流阻抗测试结果显示,在占空比为 0.5 时,沉积锂表面固体电解质界面(solid electrolyte interphase,SEI)膜电阻最大,沉积锂表面枝晶较少;单次脉冲电沉积时间过长,会使沉积锂表面 SEI 膜电阻减小,沉积锂表面枝晶增加;电流密度大于等于 2 mA·cm-2时,脉冲电沉积可有效抑制枝晶生长.
A pulse charge method was used to suppress the formation of lithium dendrite on the copper electrode in 0.5 mol·L-1 LiBr/propylene carbonate (PC) electrolyte. The surface variation of lithium deposition was investigated by scanning electron microscope and impedance measurement. The SEM test showed that the lithium dendrites were formed on the copper electrode during the traditional process of electrodeposition. However, the formed dendrite was suppressed by pulse charge method. The results of the impedance measurement confirmed that the pulse electrodeposition could suppress the dendrite under the optimized duty ratio (0.5). The long single pulse deposition time decreased the resistance of SEI film and led to the lithium dendrite growth. The current density had an effect on dendrite and the dendrite could be effectively suppressed with no less than 2 mA·cm-2 of current density
Finding a Probe for Extracting Information on the Momentum Dependent-Interaction in Heavy Ion Collisions

LIU Jian-Ye,GUO Wen-Jun,<br>
中国物理快报 , 2010,
Abstract: The effect of momentum-dependent interaction on the kinetic energy spectrum of the neutron-proton ratio < (n/p)gas>b(Ek) for 64Zn+64Zn is studied. It is found that < (n/p)gas>b(Ek) sensitively depends on the momentum-dependent interaction and weakly on the in-medium nucleon-nucleon cross section and symmetry potential. Therefore<(n/p)gas>b(Ek) is a possible probe for extracting information on the momentum-dependent interaction in heavy ion collisions.
Possible probe on the momentum dependent interaction in the equation of state of nuclear matter
核物质状态方程中动量相关作用可能的探针

Liu Jian-Ye,Guo Wen-Jun,<br>刘建业,郭文军
物理学报 , 2010,
Abstract: 研究了动量相关作用对于中子-质子比动能谱rb(Ek)的效应,发现rb(Ek)灵敏的依赖于动量相关作用而弱的依赖于介质中核子-核子碰撞截面和对称势.因此rb(Ek)是提取重离子碰撞中动量相关作用信息的可能探针.同时,对于丰中子弹核和相同质量稳定弹核在相同入射道条件下,丰中子碰撞系统明显加强了
Single-Particle Properties of Isospin Asymmetric Nuclear Matter

LI Zeng-Hua,ZUO Wei,GUO Wen-Jun,<br>
中国物理快报 , 2012,
Abstract:
Fault diagnosis of bearing based on empirical modedecomposition and K-means clustering
基于EMD和优化K-均值聚类算法诊断滚动轴承故障

GUO Yan-ping,YAN Wen-jun,<br>郭艳平,颜文俊
计算机应用研究 , 2012,
Abstract: The vibration signal is nonstationary and the sample with typical fault is difficult to acquire. The severity of fault diagnosis is the same important to style diagnosis. This paper presented a novel fault diagnosis of bearings based on the characteristic fault frequency and K-means clustering. The reconstructed signal could be obtained by some set of IMF components of the vibration signal by EMD. It performed the Hilbert envelope analysis to reconstructed signal. From the power spectrum of Hilbert envelope signal, it could identify the amplitude of the characteristic fault frequency and its integer multiples, which was used to diagnose the style and severity of fault. The result demonstrates that the proposed method based on EMD and K-means clustering can recognize the style and severity of bearing fault.
New IMF stop criterion and its application in fault diagnosis of wind turbine
一种新的IMF判据及其在风力发电机滚动轴承故障诊断中的应用

GUO Yan-ping,YAN Wen-jun,<br>郭艳平,颜文俊
计算机应用研究 , 2012,
Abstract: In order to solve the disadvantage of existing IMF stop criterion, the paper proposed a new criterion. There was no need to set a experiential value, which was related to the number of sifting process. Comparing to other method, it is demonstrated that the IMF component obtained by the stop criterion based on kurtosis can reflect the characteristic of non-stationary and nonlinear. This IMF stop criterion was applied to the fault diagnosis of rolling bearing in wind turbine, the result show that this criterion is effective and veracity.
Influence of incidence channel condition on isospin fractionation ratio based on the revised isospin-dependent quantum molecular dynamics
改进的QMD模型研究不同入射道条件对同位旋分馏强度的影响

Guo Wen-Jun,Sun Chang-An,Liu Jian-Ye,<br>郭文军,孙长安,刘建业
物理学报 , 2009,
Abstract: 通过在同位旋相关量子分子动力学模型(IQMD)中引入同位旋依赖的动量相关作用和同位旋相关的Skyrme势,得到了改进的同位旋依赖的量子分子动力学模型,并用此模型分析和讨论了中能重离子碰撞中的同位旋分馏强度随入射道条件的演化.结果表明在中能重离子碰撞中各种入射道条件下同位旋依赖的动量相关作用和Skyrme势有着明显的同位旋效应,它们减弱了同位旋分馏的过程.
Size-dependent optical properties and carriers dynamics in CdSe/ZnS quantum dots

Ma Hong,Ma Guo-Hong,Wang Wen-Jun,Gao Xue-Xi,Ma Hong-Liang,<br>
中国物理 B , 2008,
Abstract: Size-dependence of optical properties and energy relaxation in CdSe/ZnS quantum dots (QDs) were investigated by two-colour femtosecond (fs) pump--probe (400/800\,nm) and picosecond time-resolved photoluminescence (ps TRPL) experiments. Pump--probe measurement results show that there are two components for the excited carriers relaxation, the fast one with a time constant of several ps arises from the Auger-type recombination, which shows almost particle size-independence. The slow relaxation component with a time constant of several decades of ns can be clearly determined with ps TRPL spectroscopy in which the slow relaxation process shows strong particle size-dependence. The decay time constants increase from 21 to 34\,ns with the decrease of particle size from 3.2 to 2.1\,nm. The room-temperature decay lifetime is due to the thermal mixing of bright and dark excitons, and the size-dependence of slow relaxation process can be explained very well in terms of simple three-level model.
Curve Fitting Based on Uniform B-splines with Shape Parameter
基于形状参数均匀B样条的曲线拟合方法研究

ZHAO Yan-li,SHI Wen-jun,GUO Cheng-hao,LIU Feng-yu,ZHAO Yan-li,SHI Wen-jun,GUO Cheng-hao,LIU Feng-yu,ZHAO Yan-li,SHI Wen-jun,GUO Cheng-hao,LIU Feng-yu,ZHAO Yan-li,SHI Wen-jun,GUO Cheng-hao,LIU Feng-yu,<br>赵颜利,史文俊,郭成昊,刘凤玉
中国图象图形学报 , 2007,
Abstract: This paper analyses the uniform B-spline model with shape parameters,and applys the model to the curve fitting of discrete data points.In this paper,the value of the shape parameter is studied,and an algorithm based on iterative linear closest points is put forward to rectify the parameter values of data points.The analysis of experimental results demonstrates the validity and robustness of our algorithm.
Molecular dynamics investigation of shock front in nanocrystalline aluminum: grain boundary effects
晶界对纳米多晶铝中冲击波阵面结构影响的分子动力学研究

Ma Wen,Zhu Wen-Jun,Chen Kai-Guo,Jing Fu-Qian,<br>马文,祝文军,陈开果,经福谦
物理学报 , 2011,
Abstract: The shock front structure and the plastic deformation of nanocrystalline aluminum under shock loading are investigated by using molecular dynamics simulations. The simulation results show that: after the elastic wave was generated, the grain boundary sliding and deformation dominated the early plastic deformation mechanisms, then the partial dislocations were nucleated at the deformed grain boundaries and spread within the grains, finally the process of stacking faults, deformation twins and full dislocation formation in the grain dominated the latter stage of the plastic deformation. The structural characteristics after the shock front swept over is that the stacking faults and the deformation twins are left in grains, and the majority of the full dislocations are annihilated at the opposite grain boundaries. It is reported for the first time that the shock front structure reflects the time sequence of two different plastic deformation mechanisms in nanocrystalline aluminum.
Page 1 /301237
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.