加强产学研用深度合作,突出工程硕士工程实践能力培养

工程硕士专业学位教育强调工程性、实践性和应用性,旨在培养适应经济社会发展的应用型、复合型高层次工程技术和工程管理人才。兰州理工大学从培养方案修订、课程改革、实践基地建设、质量保障体系建立等方面对全日制工程硕士研究生的培养模式进行改革,加强产学研用深度合作,突出工程实践能力培养,取得了一定成效。     

化纤精纺陶瓷磨擦盘的研制

本文在Mgo—Al_2O_3—SiO_2三元系高铝瓷配方的基础上,选用高纯活性α—Al_2O_3粉料,将MgO 等复合添加剂按一定成份和比例加入配料中以促进烧结,并改善材料的显微结构。采用一次造粒的干压成型工艺,在高温隧道窑中连续烧成,获得了批量产品性能一致的细晶陶瓷磨擦盘制品。     

塑料异型材挤出模中的压力分布

本文对塑料异型材挤出模机头典型流道结构进行了分析，给出了各种类型流道的压力降计算公式，并用一实例说明文中所述方法的正确性。     

基于树搜索算法的多用户MIMO系统的自由度分配

针对最大化多用户MIMO系统的和速率的问题,提出了将迭代式干扰对齐技术（Iterative Interference Alignment：ⅡA）和系统自由度（DoF）分配策略相结合的一种算法.系统的DoF分配是通过树搜索算法（Tree search）来实现的.理论分析及实验仿真结果表明,该算法获得的系统容量,接近遍历法（exhausting search：EX）的结果,但是在算法复杂性及收敛时间上明显优于遍历法.     

基于实时动作捕捉技术在影视动画中的研究

随着《金刚》、《加勒比海盗2》、《阿凡达》等一系列影视作品的热映,这些影片中的虚拟角色可谓是深入人心,深受观众的喜爱.这些虚拟角色的建立不同于传统的3D影视动画制作,而是取自于真实的人物动作和表情.综述了目前动作捕捉领域中几大主流动作捕捉系统,并且详细讲解了动作捕捉技术在影视动画领域的应用,最后提出了一种新的动作捕捉设计方案-无标记点的动作捕捉设计.     

工艺条件对玻纤增强ABS材料力学性能的影响

通过对30％玻纤增强ABS材料微观形态观察和分析，探寻了加工工艺条件和加入马来酸酐接枝ABS对材料力学性能的影响，结果表明，加入马来酸酐接枝ABS可明显改善基体材料与玻纤的粘结状况，使力学性能得到较大幅度的变化，加工温度的提高和适当的螺杆转速可提高玻纤在基体中的分散性，尽管玻纤分散性较好的材料其玻纤含量较低，玻纤长度较短，但仍使力学性能得到改善。     

化学铣切槽液中Na2S的分析

本文采用“碘量法”测定化铣液中的硫化钠，分析结果的准确度和精密度完全能够满足生产要求。     

氟烷基硅烷改性硅树脂陶瓷防污剂研制及应用

通过添加甲基三氟丙基二甲氧基硅烷来改性硅树脂陶瓷防污剂可明显地改善防污剂的耐油性污渍的性能,同时氟烷基硅烷改性硅树脂陶瓷防污剂保持了有机硅树脂防污剂的持久防污性能的优点。用金相显微镜、扫描电镜观察抛光砖表面孔隙的变化。     

聚氨酯的阻尼性能与频率关系的研究

从时温等效原理出发,依据WLF方程和自由体积理论推导了一个较为简单的将高分子材料的温度谱转变为频率谱的方法。用该方法计算得到的损耗因子与实验数据吻合得很好。研究了所合成的聚氨酯材料在1～10000Hz范围内的特征阻尼频率.结果表明25℃下.含填料的H052的特征阻尼频率为5430Hz。     

Pheromone specificity inEriocrania semipurpurella (Stephens) andE. sangii (Wood) (Lepidoptera: Eriocraniidae) based on chirality of semiochemicals

The fifth abdominal segment of femaleEriocrania semipurpurella (Stephens) andE. sangii (Wood) contains a pair of exocrine glands. Hexane extracts of this segment were prepared from both species and analyzed by gas chromatography with simultaneous flame ionization and electroantennographic detection (EAD). For both species, the EAD active peaks were identified as nonan-2-one, (Z)-6-nonen-2-one, and (Z)-6-nonen-2-ol by means of mass spectrometry and comparison of retention indices with those of synthetic standards. Enantiomeric separation of chiral alcohols from the female extracts was achieved by gas chromatographic analysis on a cyclodextrin column. InE. semipurpurella, a mixture of (2S,6Z)-nonen-2-ol and (2R,6Z)-nonen-2-ol (2: I) was found, whereas inE. sangii (2S,6Z)-nonen-2-ol was the predominant enantiomer and only traces of theR enantiomer were indicated by the antennal response. In field tests, a blend of the three compounds was not attractive to conspecific males. A subtractive assay showed that the alcohol in various enantiomeric mixtures was the only attractive compound, whereas addition of (Z)-6-nonen-2-one to the alcohol completely inhibited the attraction of both species. A trapping experiment including a wide range of ratios between theR andS enantiomers showed that baits containing 95–100% of theS enantiomer were attractive to maleE. sangii, whereas males ofE. semipurpurella were attracted to all tested ratios of the enantiomers. However, the response profiles of maleE. semipurpurella differed between populations from southern Sweden, south Finland, and the Kola Peninsula in Russia. In south Sweden males were maximally attracted to a racemic mixture of the alcohols. At the Kola PeninsulaE. semipurpurella was attracted to baits containing 95–100% of theR enantiomer. In south Finland all tested ratios between 0 and 100%R enantiomer trappedE. semipurpurella, but the trap catches appeared to be bimodally distributed with peaks around 15 and 70%R enantiomer. The trapping results suggest the existence of pheromone races or sibling species among the specimens identified asE. semipurpurella.Dedicated to Prof. H. J. Bestmann on the occasion of his 70th birthday.