布儒斯特角显微镜和单分子膜表面形貌研究技术

用布儒斯特角显微镜研究了花生酸分子成膜过程中单分子膜表面形貌的动态变化，发现在气／液界面上花生酸分子首先形成岛状分布，随着表面压的增加形成完整的单分子膜，而当表面压达到崩溃压后薄膜出现裂纹，分子膜重叠，形成多层膜。分析了花生酸单分子膜的形成机理。     

自组装膜的表面反应及自组膜的构筑

界面反应已成为界面自组装构筑的一个重要反应方面.从自组装膜的形成及自组装膜的气相、液相、膜上分子交联反应以及膜表面大分子寡聚体的设计组装等几个方面的表面反应对近年来自组装膜构筑方面的进展予以分析和综述.引用文献23篇.     

西北干旱区地表水与地下水资源转换的几个问题探讨

从山区至平原，地表水与地下水之间在不同地质地貌单元相互转换，是我国西北干旱区山前平原水资源的主要特点，直接影响到水资源开发利用模式的变化。随着和水利用率不断提高，减少了地下水补给来源，引起地下水位下降，泉水量削减，甚至枯竭，迫使泉灌区边城井灌。这在水资源西藏高原、森林资源、持续发展     

创新作文的教学探索

作文教学是语文教学的关键。创新作文的教学,要加强写前指导,激发学生的写作兴趣;创新写作形式,拓展学生的思维;利用多样批改方式,提高学生的写作能力;创新传统的讲评方式,培养学生欣赏美的能力。     

Application of response surface methodology in medium optimization for pyruvic acid production of <Emphasis Type="Italic">Torulopsis glabrata</Emphasis> TP19 in batch fermentation

Response surface methodology （RSM） was used to optimize the fermentation medium for enhancing pyruvic acid production by Torulopsis glabrata TP19. In the first step of optimization, with Plackett-Burman design, ammonium sulfate, glucose and nicotinic acid were found to be the important factors affecting pyruvic acid production significantly. In the second step, a 23 full factorial central composite design and RSM were applied to determine the optimal concentration of each significant variable. A second-order polynomial was determined by the multiple regression analysis of the experimental data. The optimum values for the critical components were obtained as follows： ammonium sulfate 0.7498 （10.75 g/L）, glucose 0.9383 （109.38 g/L） and nicotinic acid 0.3633 （7.86 mg/L） with a predicted value of maximum pyruvic acid production of 42.2 g/L. Under the optimal conditions, the practical pyruvic acid production was 42.4 g/L. The determination coefficient （R^2） was 0.9483, which ensures adequate credibility of the model. By scaling up fermentation from flask to jar fermentor, we obtained promising results.     

时白林黄梅戏音乐创作技法中传统元素的运用

时白林是我国著名的黄梅戏作曲家,在黄梅戏音乐创作技法上进行了很多变革,尤其是对传统音调重新编排以及典型音调收拢性结束等方法的运用,增加了黄梅戏的韵味,创作出大批黄梅戏的经典之作。     

莫友芝生日诗探析

晚清著名诗人莫友芝一生创作诗歌千余首,其中有一类比较特殊的,那就是生日诗。自道光十六年26岁始至咸丰十年50岁止,莫友芝一共写了24首生日诗。其生日诗创作的主题有三：一是抒发事业无成、时不我待的怅惘;二是表达对亲人、故乡的思念和关切之情;三是表现友人间诚挚的友谊。     

Development of integrated precision vibration-assisted micro-engraving system

A novel precision vibration-assisted micro-engraving system was developed by the integration of fast tool servo and ultrasonic elliptical vibration system, in which the flexure hinge was designed to avoid backlash and PID control algorithm was established to guarantee specific precision. Apart from experimental validation of the performance of the system, various micro-V-grooves cutting experiments on aluminum alloy, ferrous material and hard cutting material were performed, in which Kistler force sensor was used to measure cutting force. Through experiments, it was clear that the vibration-assisted micro-engraving system can ensure good quality of micro-V-grooves and reduce cutting force by about 60% compared with traditional removal process without ultrasonic vibration.     

基于MATLAB的结构可靠度分析方法研究

基于结构可靠度分析方法—JC法、蒙特卡罗法和响应面法的基本原理,利用MATLAB软件对算例编制了相应计算程序,并对计算结果进行了比较.计算结果表明,利用MATLAB可以编制结构可靠度分析程序,计算结果较快,数据合理,并为复杂结构的可靠性分析提供参考.     

庆阳民居室内装饰品纹样构图研究

采用个案法、归纳法和文献法对庆阳民居室内装饰品的纹样构图进行了研究,结果表明：庆阳民居室内装饰品的纹样构图有共用形、形中形和复合形三种方法;这三种构图方法受到古代八卦、数字观念的影响,凸显求子、求寿、求贵和图腾崇拜的主题;蕴含了儒家＂中、和＂,＂善加于物＂和＂天人合一＂的思想。