耐高温水蒸汽氟橡胶的研究

对四氟化乙丙橡胶（ＴＰ－２）和氟橡胶（ＦＫＭ－２４６Ｇ）进行了耐２８０℃水蒸汽试验。结果表明：以过氧化二异丙－三烯丙基异氰脲酸酯为硫化体系的ＴＰ－２硫化胶的耐高温水蒸汽性能，明显优于以Ｎ，Ｎ＇－双肉桂叉－１，６－己二胺为硫化体系的ＦＫＭ－２４６Ｇ硫化胶和以过氧化苯甲酰为硫化体系的ＦＫＭ－２４６Ｇ硫化胶。     

GHH烟气膨胀机叶片的国产化及使用情况分析

简要介绍了石家庄炼油厂GHH公司生产的烟气膨胀机叶片国产化情况、使用中出现的问题以及改进方法，肯定了进口机组叶片国产化的工作思路。     

高校计算机机房管理模式的探讨

高校的计算机机房为学生提供日常授课、特殊考试、自主上机等服务,是高校开展信息教育的重要场所.机房的建设与管理工作水平直接体现了高校的信息化水平,也直接影响了计算机相关教学的教学质量.本文对传统的机房管理模式进行了分析,探讨了其优点与不足,并且提出了一种新型的机房专职管理教师与学生协同的管理模式,具有一定的参考价值.     

天然肉桂油臭氧化制取苯甲醛

利用天然肉桂油中富含的肉桂醛，经过臭氧化反应和还原反应制得了苯甲醛。由该法制得的苯甲醛在国际上可作为天然苯甲醛使用。     

Fe doping effect on EuTiO3: The magnetic properties and giant magnetocaloric effect

The magnetic properties and magnetocaloric effect for EuTi_1-xFe_xO₃ (x = 0.05, 0.1) compounds are investigated. When a part of Ti⁴⁺ions were substituted by Fe ions, the AFM ordering can be significantly changed to be FM. The EuTi_1-xFe_xO₃ (x = 0.05, 0.1) compounds exhibit a PM to FM transition with decreasing temperature and the Curie temperature is 6 K. Under the field changes of 1 T, and RC are valued to be 10.1 J/kg K and 50.2 J/kg for EuTi_0.95Fe_0.05O₃; 9.6 J/kg K and 47.7 J/kg for EuTi_0.9Fe_0.1O₃, without magnetic and thermal hysteresis. RC is almost twice as much as EuTiO₃ (27 J/kg) as substitution of Fe³⁺ ions for Ti⁴⁺ions, which may be attributed to the magnetic transition (AFM to FM). Therefore, the giant and large RC suggest the EuTi_1-xFe_xO₃ compounds are good materials for magnetic refrigerant.     

水平气井优化设计与应用

分析影响水平气井优化设计的地质因素、水平井最优长度、最优位置.结合水平井优化设计的实例分析,提供确定水平井最佳长度和位置的方法.     

Corner forming of AZ61A magnesium alloy tube within warm hydroforming

The corners with small radii on cross sections are crucial for forming hydroformed components with polygonal sections.In this paper,warm hydroforming experiments of AZ61A magnesium alloy tubes were carried out to study the forming regularity of round corners by using a demonstration part with square sections.Effects of temperature on radius forming,thinning ratio distribution and microstructure were revealed and a component with relative outer corner radius of 3.0 was obtained by warm hydroforming at 240℃.The minimum thickness of the formed square section was located in the transition position between the corner and the straight wall.The thinning ratio of the round corner increased with the increase of forming temperature.Formability of the magnesium tube was improved by raising temperature under the effect of dynamic recrystallization at 240℃.     

一种宽范围输入的光伏并网逆变器

根据光伏阵列的特点,介绍了一种适用于宽范围输入电压的光伏并网逆变器.详细的介绍了该逆变器的结构及控制方法,分析了其在单级/两级光伏并网逆变器两种工作模式下切换的原理.搭建了实验样机,实验结果验证了方案的可行性.     

地月系共线平动点Halo轨道族的运动稳定性研究

地月系共线平动点附近的Halo轨道族,能够提供从L1点至月球再至L2点的广泛空间的多种轨道应用需要,但2个轨道族内轨道的稳定性差异较大。文章引入稳定系数和线性稳定阶数2个指标来判断轨道的稳定性,并用数值模拟分别分析了百米和千米量级的初始轨道误差在数天后所引起的轨道偏差,得出结论：两轨道族内接近平动点的部分轨道稳定性较差,其余部分轨道稳定性相差不大,L1点附近Halo轨道族内轨道较为稳定的是0.85~0.92之间的轨道,L2点较为稳定的是1.02~1.1之间的轨道。     

以深化专业内涵建设为目标的全方位产学研结合途径探索

紧密依托行业产业,强化专业内涵建设,提高专业建设的科学性和先进性,必须坚持走产学研结合之路。文章从高等职业教育改革发展的全局考虑,明确了产学研结合的基本目标,全方位探索了产学研结合的有效途径,为高职院校的产学研工作实践提供了可供借鉴的思路。