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Application of spherical Ni(OH)2/CNTs composite electrode in asymmetric supercapacitor WANG Xiao-feng(王晓峰), RUAN Dian-bo(阮殿波), YOU Zheng(尤 政) Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China Received 6 December 2005; accepted 8 May 2006 Abstract: The composite electrodes consisting of carbon nanotubes and spherical Ni(OH)2......
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distribution by height. Water content increases in frozen soil area, and decreases in unfrozen area. Wherever the ice lens body exists, void ratio tends to increase and water content increases substantially...; void ratio; mathematical model 中国的多年冻土面积占国土面积的22.3%,分布较广.冻土区的冻融作用使得构筑物出现裂缝,倾斜,沉陷,结构断裂等现象,给道路和构筑物造成很大的危害.冻土冻胀的机理研究一直是冻土界注重的问题之一[1-3].Harlan[4]根据未冻水动力学原理,提出考虑水分迁移和冰水相变的一维非线性水热耦合方程.该方程可用来求解温度和水分的变化.Konrad......
that the phosphors consist of spherical particles with an average size of about 1 ~ 3 μm.In the crystalline Ca2 Y8 (SiO4)6O2: Eu3+ phosphor, the Eu3+ shows its characteristic emission corresponding to 5 D0 - 7 FJ ( J...; luminescence; europium; spherical phosphor; [全文内容正在添加中] ......
Trans. Nonferrous Met. Soc. China 29(2019) 270-278 Effect of prestressed ultrasonic peen forming parameters on bending curvature and spherical deformation of plate Tao ZHANG1,2, Lei LI1, Shi-hong LU1...) was adopted in order to solve problems of insufficient bending deformation and large spherical deformation of plate during free UPF. The theoretical analysis of prestressed UPF and the influence......
复合材料孔隙含量超声检测系统的设计研究 吴作伦1,宋立军2,蒋志峰1,吴瑞明1 (1.浙江科技学院机械与汽车工程学院,杭州,310023;2.北方设计研究院,石家庄,050011;3.浙江省计量科学研究院,杭州,310013) 摘要:本文结合碳纤维复合材料内部孔隙含量的超声检测理论模型,阐述了计算机控制超声检测系统数据采集和数据处理的原理和实施方法.重点对数字超声卡的操作,时域波形信号的处理,复合材料孔隙率的C扫描成像显示以及直方图分析等关键问题进行分析研究,开发相应的软件应用模块,构建合适的自动化超声检测系统,以满足实际工程中超声检测的要求. 关键词:超声检测; 孔隙率; 复合材料; ultrasonic test; void content; CFRP; [全文内容正在添加中] ......
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of ZrO2(Y2O3) spherical nanometer powders via coupling route of water-oil emulsion with homogenous precipitation CHANG Ying, LI Xi-bin, MENG Zhen-qiang, ZHAO Fu-an (State Key Laboratory of Powder... possess some characteristics, such as larger productivity, spherical shape and excellent dispersing. It is found that the concentration of zirconium, the reaction temperature and the content of methyl......
in brittle surface induced by small-radius (radius≤200 μm) spherical indenter, respectively. And contribution of elastic stress field to the radial cracks propagation was also considered in the loading... fixed abrasive grinding of BK7 glasses are 5.8 and 5.4, respectively. Key words: subsurface damage; spherical indenter; optical materials; grinding process; magnetorheological finishing......
of spherical LiMn2O4 for Li-ion batteries based on controlled crystallization HE Xiang-ming1, PU Wei-hua1, CAI Yan1,JIANG Chang-yin1, WAN Chun-rong1, XIA Ding-guo2 (1. Institute of Nuclear and New Energy... to synthesize LiMn2O4 with spherical particles from cheap materials of MnSO4, NH4HCO3, NH3·H2O and LiCO3. The preparation started with a carefully controlled crystallization of MnCO3. Thermal decomposition......