如何受益硅烷偶联剂的奇妙功效

介绍了硅烷偶联剂的常规品种和新型产品：简述了硅烷偶联剂的作用机理和性能改进；总结了硅烷偶联剂的使用方法和注意要点：提出了只有正确使用才能奇效凸显，获益匪浅。     

In vitro cytocompatibility and corrosion resistance of zinc-doped hydroxyapatite coatings on a titanium substrate

To improve biocompatibility and corrosion resistance during the initial implantation stage, zinc-substituted hydroxyapatite (ZnHAp) coating was fabricated on pure titanium by the electrolytic deposition method. The morphology, microstructure and chemical composition of the coating were investigated by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis and Fourier transform infrared spectroscopy. The prepared ZnHAp crystals were calcium deficient and were carbonated owing to the incorporation of some Zn²⁺. This incorporation of Zn²⁺ into the HAp significantly reduced porosity and caused the coating to become noticeably denser. In addition, the Zn²⁺ ions were homogeneously distributed in the coating. The potentiodynamic polarisation test revealed that the ZnHAp-coated surface showed superior corrosion resistance over that of the HAp-coated surface and bare Ti. The in vitro bioactivity was evaluated in a simulated body fluid, which revealed that the ZnHAp coating can rapidly induce bone-like apatite formation of nuclear and growth features. In addition, the cell response tests showed that the MC3T3-E1 cells on the ZnHAp coating clearly enhanced the in vitro cytocompatibility of Ti compared with the same cells on HAp coating. ZnHAp coating was thus beneficial for improving biocompatibility.     

新型大跨索结构避难帐篷现场试验与数值模拟

基于现场试验,对实测风荷载作用下大跨度索结构避难帐篷的顶点位移进行测量,分析风速对顶点位移的影响,得出了实测风荷载与结构顶点位移之间的关系。应用ABAQUS有限元软件对风荷载作用下的大跨度索结构避难帐篷的顶点位移进行有限元计算,有限元计算结果与试验结果具有较好的一致性。通过降低脚手架材料的刚度,模拟不同刚度条件下结构的风载-位移响应;并模拟了雪荷载以及温度荷载作用下大跨度索结构避难帐篷的受力性能。研究结果表明:大跨度索结构避难帐篷的抗风、抗雪荷载性能以及温度荷载作用下的变形幅度均能达到安全使用要求。     

二脱水山梨醇聚氧乙烯醚油酸酯纯品的合成

山梨醇经催化脱水,高真空减压蒸馏得到二脱水山梨醇,与环氧乙烷反应得到二脱水山梨醇聚氧乙烯醚,最后与高纯度油酸缩合得到高纯度组分二脱水山梨醇聚氧乙烯醚油酸酯,是聚山梨酯80的重要组成成分。     

厌氧氨氧化反应器的启动方法研究进展

厌氧氨氧化反应器的启动时间过长是制约厌氧氨氧化在工程实践中发展和应用的一个关键性因素,因此实现厌氧氨氧化反应器的快速启动对于该项技术的推广意义十分重大。分析比较了选取不同类型的反应器和接种不同类型的污泥对于厌氧氨氧化反应器启动时间及脱氮效果的影响,并对今后的研究方向提出了建议。     

基于模糊PID的退火炉温度控制研究

退火炉的自动控制策略已成为过程控制的研究热点。由于退火炉是一个大惯性、纯滞后、参数时变的非线性控制对象,很难准确建立起炉子的精确数学模型,根据退火炉工业系统的特点,采用了模糊PID参数自调整控制的控制方法,将其应用于退火炉温度控制环节。本文利用Simulink对模糊神经网络PID控制算法进行仿真试验。试验显示,模糊神经网络控制算法能够展现强抗干扰性、强鲁棒性以及良好的控制性能,适用于对退火炉的温度控制中。     

A windmill with cam-articulated blades

The design is described of a windmill with blades articulated by means of cam contours. The choice of a suitable cam contour is discussed, and several alternatives are presented. Performance predictions are described for a six-flap, horizontal-axis windmill model with a selected cam contour. Windtunnel experiments have been conducted on this model and performance improvements are suggested. Predictions and experimental findings agree well.     

输电塔-导线耦联体系模型的振动台试验研究

进行了大跨越输电塔-导线耦联体系的振动台试验,用以检验所提出的输电塔-导线耦联体系理论计算模型和方法的合理性和正确性。试验结果表明,在纵向和侧向振动情况下,最大加速度地震反应的理论值和试验值的误差均在可以接受的范围以内,说明所提出的输电塔-导线耦联体系的理论计算模型是合理的。从理论计算结果和试验结果的误差分析可知,侧向振动情况下的输电塔理论计算模型要比纵向情况下的精确一些。导线对输电塔地震反应的影响较大,在实际计算中不可忽略。塔架与导线之间存在的耦联作用越显著,导线对输电塔地震反应的影响越大。     

基于偏最小二乘回归的电能替代多情景预测方法

当前我国面临的能源供应与环境保护形势十分严峻,电能替代受到社会各界的强烈关注.综合考虑能源价格、碳排放量等因素的作用,从4个维度出发构建电能替代影响因素指标体系和多情景分析模型;提出基于偏最小二乘回归的电能替代潜力分析预测方法,结合未来辽宁能源、经济、电力发展预测数据,预测十三五期间累计电能替代量的预测区间.结果表明,...     

溶致液晶偏振薄膜的研究

对N, N'-二氢化蒽醌吖嗪(还原蓝RSN)和N, N'-二苯并咪唑-1,4:5,8-萘酰亚胺(还原猩红GG)改性处理引入磺酸基,使其成为双亲性化合物,红外光谱结果表明磺酸基改变了分子的极性.双亲性染料分子在极性溶剂中溶解、浓缩、自组装成有序聚集体,在正交偏振光下,织构呈带状和棒状.将溶液用线棒涂布器在玻璃衬底上展开,同时剪切诱导分子取向分布,溶剂自然蒸发后形成0.5～0.7μm厚固态偏振薄膜.溶致液晶的粘度显著影响涂布薄膜的表面平整度和取向度,在可见光部分波段,薄膜具有良好的光学偏振效率,最佳偏振效率达到95%以上,实用前景看好.