助推段弹道导弹的主动跟踪

助推 弹道导弹的主动跟踪是一个非常具有挑战性的问题。由于机载激光（ＡＢＬ）要利用这一技术， ＡＢＬ是对主动跟踪感兴趣的几种定向能武器计划之一。针对这一技术挑战，菲利津实验室已开始一项计划，以证实大气中远水平距离上的主动跟踪的可行性，这一计划包含两个独立的阶段。第一阶段是利用林肯实验室可定标距离上的静止靶研究湍动的大气中的跟踪。     

100LFD－32型稀硫酸泵

开发研制１００ＬＦＢ—３２稀酸净化循环泵。其衬里所选之聚全氟乙丙烯和聚四氟乙烯的复合物，较ＰＶＣ、ＰＥ和ＡＢＳ性能皆优良；结构设计形式避免了酸的泄漏和下轴承磨损。泵效率＞５０％。工业性试验，连续运行３０００小时以上。     

糖尿病人的夏季食疗

夏季是糖尿病患者治疗的最佳时机,由于体内血糖的变化与季节的关系非常密切,冬天的血糖要比春秋高,而夏天是一年中血糖最低的季节。故此时糖尿病患者若在常规治疗的基础上配合饱含疗法,则能收到事半功倍的效果。     

浅谈济南市西区景观湖复合土工膜防渗施工技术措施

近几年,为打造济南市西城区为“山水绿城”相融一体的现代化新城区,济南市西城区建设指挥部将原东风水库改建为景观湖,功能由防洪补源调整为防洪、蓄水、休闲等。景观湖占地面积为1．1km~2,平均蓄水深9．0m,最大蓄水深11．0m。本工程于2006年1月开工建设,5月底完成工程主体施工。     

Influence of melt superheat on breakup process of close-coupled gas atomization

In close-coupled gas atomization（CCGA）, the influences of melt superheat on breakup process are fundamental to obtain desired or finer powder. Based on a series of Cu atomization experiment under different superheating conditions, the influences of melt superheat on breakup process were studied. Experimental results indicate that as the melt superheat is increased to 150, 200, 250 and 300 K, the mean particle size （D50） decreases consequently to 34.9, 32.3, 30.9 and 19.7 μm. Theoretical analysis reveals that the primary breakup and secondary breakup processes are close coupled, and the melt superheat radically influences the melt properties, and plays a crucial role on governing the filming process of primary breakup and the atomization modes of secondary breakup. There exists a strong nonlinear decrease of contact angle of melt to nozzle orifice wall when the superheat is increased fi＇om 250 K to 300 K, leading to a marked fall of the film thickness formed in primary breakup, and D50 of copper powders is therefore sharply reduced. However, the log-normal distribution feature of particle size has not been substantially improved.