档案管理工作对于推动我国经济发展具有重要作用,因此促进档案管理实现现代化建设具有重要意义.本文首先分析了档案管理现代化的作用,随后提出了档案管理现代化过程中存在的
Mass density of the current flows is the one of the important problem in the hydraulics of the dam reservoir.Plunge point occurs when the mass density current p
对WO_3/Ni(OH)_2·xH_2O这两种电致变色薄膜的电色互补性原理及其电色特性进行了研究,发现利用三氧化钨和氧化镍薄膜的电色互补性能够较好地改善双层膜的电色特性。为灵巧窗等电
Study of beach morphology has been one of the most important issues in coastal engineering research projects.Because of the existence of two important coastal a
为了研究掘进机截割过程中截齿的磨损机理及主要影响因素,使用EBZ260W纵轴式掘进机进行了试验研究。通过截割人工岩壁以模拟井下的实际工作过程,并对截齿在试验前后的质量、
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M16/M16A1步枪及其所用附件服役时间较长,至今仍有军事单位在使用,其间经历了越南战争等重大历史事件;1960年代后半叶,尼龙和塑料等新材料的引入,更是对其各种附件产生了极大
Recent earthquakes in Pakistan (Kashmir 2005,Balochistan 2008,and Balochistan 2013) revealed the vulnerability of existing building stock and the deficiencies i
This paper presents the findings of an experimental program seeking to understand the effect of mineral admixtures on fresh and hardened properties of sustainab