Experimental investigation and thermodynamic assessment of the yttriumhydrogen binary system

A coupled experimental investigation and thermodynamic study of the yttrium-hydrogen(Y-H) binary system were carried out to provide more comprehensive and quantitative insights into the key thermodynamic properties of this system. Y-H system in the full range of H/Y = 0–3.0 was investigated by accurate pressure composition isotherm(PCI) measurement to provide credible phase equilibria information and thermodynamic data.The phase boundaries obtained were in agreement with previous experimental data but with improved accuracy.With the guide of the crystal structures, all the solid phases were modelled using the three sublattice model. The Y-H phase diagram and thermodynamic parameters were calculated and assessed with the CALPHAD technique.The obtained results are in very good agreement with our experimental data and the published data reported in literature. The obtained thermodynamic database of Y-H system can be used to predict the hydrogenation behavior and decomposition temperatures of hydrides.     

Nanoengineering of amino - functionalized mesoporous silica nanospheres as nanoreactors

Selective functionalization of mesoporous silica nanospheres (MSNs) is crucial for nanoengineering of MSNs. Herein, we have combined “surface-protected etching strategy” and “cationic surfactant assisted etching strategy” to prepare functionalized MSNs with externally attached amino groups. The externally attached NH2 groups endow the catalysts with excellent catalytic performance for nitroaldol reaction between nitromethane and benzaldehyde. In addition, those NH2-MSNs can also be used to support gold nanoparticles, which display very good catalytic performance for reduction of 4-nitrophenol. It can be envisioned that the synthesis protocol developed in this work could also be extended to nanoengineered MSNs, which provides opportunities for nanoreactors design.     

机械CAD系统用户界面设计技术

介绍了开发基于AutoCADR14平台的机械CAD系统中的菜单、工具条、对话框等用户界面设计方法和技术.     

液压蓄能式波浪能装置发电系统的特性

分析了液压蓄能式波浪能转换器(WEC)的工作原理和优势;根据液压马达和永磁同步发电机的数学方程推导出了发电系统的4个基本特性,分析了蓄能器压力和发电机负载对转速、电压和功率的影响;针对液压蓄能式WEC发电系统的两种工作模式——恒电阻模式和恒转速模式,建立了液压蓄能式WEC发电系统的Matlab/Simulink仿真模型,并进行了仿真实验,结果验证了关于液压蓄能式WEC发电系统特性推理的正确性.     

生物液晶对CaCO3结构影响的超声效应

应用Ｄ／ｍａｘ－ⅢＣ型全自动Ｘ射线衍射仪对常温下几种化学合成的ＣａＣＯ３结构进行了研究．结果表明，一般化学法合成的ＣａＣＯ３以方解石结构存在；在液晶相中合成的ＣａＣＯ３以霰石结构存在；而在用超声处理过的液晶相中合成的ＣａＣＯ３既有方解石结构存在，又有霰石结构存在     

金属等离子体浸没动态离子束增强沉积

采用由阴极真空弧等离子体源、负脉冲高压靶台和磁过滤系统组成的金属等离子体浸没动态离子束增强沉积系统,对３０４Ｌ不锈钢进行金属等离子体浸没动态离子束增强沉积处理。对试样予以电化学测试和ＡＥＳ分析。动态增强沉积试样比非增强沉积试样有更强的抗电化学腐蚀能力。     

动态风载荷下交叉跨越线路连接金具受力特性

为提高交叉跨越线路的安全运行水平,以某220 kV交叉跨越线路作为研究对象,利用线性滤波法模拟大风工况和正常工况下的脉动风速时程曲线,对交叉跨越线路有限元模型进行动态分析计算,然后重点对金具的受力状态进行对比分析,找到易损位置,并提出相应的改进措施。结果表明:悬垂串球头挂环连接处受到的应力最大;两种工况下应力与许用应力的比值分别为0.35和0.44,和现场实测断裂位置吻合,需要重点注意;在球头和直棒连接处加厚,安全系数由1.5提高到1.6,可有效降低金具破坏风险。     

基于数据采集的虚拟数字存储示波器

用通用数据采集卡构成虚拟数字存储示波器系统,并讨论虚拟数字存储示波器的功能实现及软件设计方法     

蛋白质与蛋白质组学的研究进展

介绍了蛋白质、蛋白质组和蛋白质组学的基本概念，蛋白质组学的研究内容、方法技术、形成与发展。     

粗唇鮠生物学的初步研究

１９９１年１０月至１９９２年７月，在嘉陵江下游采集粗唇标本２１１尾，进行了生物学性状的测量和统计运算．用胸鳍棘脱钙切片法鉴定年龄．体长与棘切片半径呈直线正相关．渔获物中８０％为２龄和３龄鱼，雌鱼的体重和肥满度均较同体长的雄鱼高．粗唇属一次性产卵的鱼类，产卵期为５～７月，雌鱼性成熟最小型为２龄，体长１０．６ｃｍ，体重２２．２ｇ．绝对繁殖力为１３７２（５８３～２３９２）粒，且与体长、体重、年龄和成熟系数成正相关。受精卵卵径２．０～２．２ｍｍ．强粘性．在２６．５～３０．５℃的水温下，经５０小时４２分孵出．初孵仔全鱼长５．２～５．８ｍｍ．