共搜索到215条信息，每页显示10条信息，共22页。用时：0小时0分0秒703毫秒
) Abstract: Layers of earth-rock aggregate were proved with fractal geometry theory, double fractal model was set up and the concepts of granule and coarse grain granularity dimension value were put forward. The granularity fractal characters of earth-rock aggregate and relationships between granularity dimension value and rock content were analyzed by great mechanical sieving tests. Relationship......
; granularity distribution; sphericity; [全文内容正在添加中] ......
激光散射(衍射)法测定稀土氧化物粒度的条件优化 周晓东1,许涛2,李洁1,李培忠1 (1.内蒙古包钢稀土高科技股份有限公司,内蒙古,包头,014010;2.包头稀土研究院,内蒙古,包头,014030) 摘要:用库尔特 LS230型激光粒度仪对氧化镧,氧化铈,氧化镨和氧化钕粉末进行测量,通过对影响粒度测定的各种因素进行比对,确定了最佳工作条件,提高了粒度测定的可靠性和稳定性,确定了氧化镧,氧化铈,氧化镨,氧化钕粉末的粒度测试的较佳条件. 关键词:粒度测定; 激光散射(衍射)法; 稀土氧化物; granularity measurement; laser scattering(diffraction) method; rare earth oxide; [全文内容正在添加中] ......
transitional foaming process was discussed and the effect of granularity and addition of TiH2 on porosity of closed-cell aluminum foam was investigated. The static compressive behavior of closed-cell aluminum foam and the influence of porosity on static compressive property of closed-cell aluminum foam were researched as well. The results show that with increasing granularity of TiH2, the porosity of closed......
, ZHANG Jia-chun. Thermal conductivity of electric contact material[J]. Electric Engineering Alloy, 1996, 2(1): 15-21. [24] DENG C H, CHEN G Z, QI-LU G E. Effect of graphite content and granularity on mechanical and tribological properties of bronze alloyed powder composite[J]. Journal of Iron & Steel Research International, 2005, 12(1): 54-57. Effects of graphite granularity and pitch binder......
; granularity distributing; [全文内容正在添加中] ......
......
Trans. Nonferrous Met. Soc. China 24(2014) 2946-2953 Multi-granularity spatial-temporal access control model for web GIS Ai-juan ZHANG1, 2, Jing-xiang GAO2, Cheng JI1, Jiu-yun SUN2, Yu BAO1 1. School... and Technology, Xuzhou 221116, China Received 17 November 2013; accepted 15 January 2014 Abstract: The multi-granularity spatial-temporal-related access control (MSTAC) model was proposed to meet the spatial......
, sintering time, roasting temperature, chemical composition and granularity size of iron ore on the formation of calcium ferrite were studied by means of agglomerating, roasting and minerals... is 0.5%, optimal conditions are as follows: time is 13 min, and temperature is 1 250-1 280 ℃. When iron ore granularity is coarse, the quantity of calcium ferrite increases with the increase of SiO2......
-chemical properties of the resulting materials, including particle-size distribution, slurry pH, zeta potential, and activity index, as well as how their replacement level and granularity affect the setting time and mechanical performance of PS-cement mixture systems. The results suggested that as the granularity increases, there are significant boosts in the uniformity of particle sizes, slurry pH......
