scr反应器是什么意思 利用选择性催化还原(SCR)技术将烟气中的氮氧化物脱除的方法是当前世界上脱氮工艺的主流。选择性催化还原法是利用氨(NH3)对NOx还原功能,在320~400℃的条件下,利用催化。
英语翻译 Autogenous shrinkage of cement paste and concrete is defined as the macroscopic volume change occurring when there is no moisture exchange between the material and the exterior surrounding environment.It is the result of chemical shrinkage produced by the hydration of cement particles[5,28–30].水泥浆体和混凝土的自生收缩被定义为在材料和外部周围环境之间不存在水分交换时,发生的显微体积变化。它是由水泥粒子的水合作用产生的化学收缩的结果[5,28-30]。Autogenous shrinkage has only recently been documented and accurately measured[28,29].In the tests the concrete sample is sealed,there is no moisture transfer to the surrounding environment,and can be measured by volumetric or linear measurements.Jensen and Hansen[31],developed a special,corrugated mould system,which combines the advantages of linear and volumetric measurement.Before set,the corrugated mould system transforms the volumetric deformation into a linear deformation,and,after set,a normal,linear deformation is measured.In 。
4g网络什么时候出的 4G网络经过早期论证、实验室试验、制定标准、实用化等阶段,最早大规模投入建设始于2010年,在中国大陆,4G网络的建设则是始于2012年。经过数年的建设,2013年12月4日,工。