共搜索到21295条信息,每页显示10条信息,共2130页。用时:0小时0分0秒937毫秒
system with the consideration of local tooth profile errors and global mounting errors. This model includes a finite element model for shaft structure, a lumped- parameter bearing model and a three......
;Structure and electrochemical properties of ZnO@ Bi/C[67] 上述研究表明,大多数包覆物都能防止活性物质锌与电解液直接接触,从而改善电池的循环性能,一些具有导电性的包覆物(金属氧化物和碳材料等包覆物)还能提高电池的库伦效率,将原位掺杂和包覆相结合的核壳结构在改善电池综合性能上具有更好的效果. 3.5 其他方法 锌-空气电池锌阳极在碱性溶液中存...): 2409-2418. [28] 陆旭明, 徐少辉, 谭 强, 王连卫, 刑 涛. 多孔锌电极应用于PVA电解液的锌空气电池[J]. 电源技术, 2016, 40(12):2364-2367. LU Xu-ming, XU Shao-hui, TAN Qiang, WANG Lian-wei, XING Tao. Porous structure of zinc electrode in alkaline PVA......
(北京)地球物理与信息技术学院, 2019: 1-5. LI Shuqiang. Study for electrical structure of Xuefeng Mountain basement uplift and its western margin[D]. Beijing: China University of Geosciences(Beijing). School......
描电镜照片.由图3可见:层状砂岩基质与层理弱面差异较大,砂岩基质与层理弱面矿物粒径与排列差异明显,基质矿物粒径小且微观孔隙和裂隙少,层理弱面矿物粒径大且微观孔隙和裂隙发育明显. 图3 试样微观结构光学显微镜及扫描电镜照片 Fig. 3 Specimen microcosmic structure of optical microscopy and SEM photos 1.2 试验设备 试验系统......
analysis of Mg-7Zn-xCu- 0.6Zr alloys [J]. Transactions of Nonferrous Metals Society of China, 2018, 28: 1504-1513. [26] SPITTLE J A, CUSHWAY A A. Influences of superheat and grain structure on hot......
24 MPa. Fig. 1 Specimen structure, AE sensor arrangement, and blast position Seventeen sensors with a response frequency range of 50-400 kHz were arranged on the front and back faces......
structure of the initial problem to deal with large-scale hard problems in different fields, such as production scheduling optimization problems. To determine the multiplier values relying on the previous......
structure. The thermal radiation characteristics of a circular tunnel with the stress evolution were studied by WANG et al [29] via a biaxial compression test. When the horizontal load was constant... frequency (AF) can reflect the crack type inside a material structure; RA is the ratio of the rise time and amplitude, and the AF is obtained from the ratio of the ring count and duration. Generally, AE......
, Weinan City in Shaanxi Province, China. The area where it is located does not have a large geological structure and it belongs to the Chenghe mining area, as shown in Figure 3. Dongjiahe Coal Mine... belong to fine-grained sandstone. The second, fourth, eighth, sixteenth layers belong to coarse siltstone. The third, sixth, eleventh, thirteenth layers belong to fine siltstone. The category......
] compared and analyzed the hot deformation behavior of FGH4096 superalloys with HIPed and fine-grained microstructures. It was found that different flow behaviors occurred in the superalloys due to different... the initial microstructure of the experimentally annealed PM superalloy along the extrusion direction. Equiaxed grains with a distribution of bimodal size, namely, some large grains surrounded......