环保型船用改性环氧水乳胶的制备及应用

合成了反应型改性树脂水性丙烯酸酯共聚物,对水乳胶的粘结强度、耐介质性能等进行了研究,并对水乳胶与目前国内船用胶的有关性能进行了比较。     

Synthesis and high temperature transport properties of Te-doped skutterudite compounds

Te-doped skutterudite compounds Co₄Sb_12?x Te _x (x?=?0.4–0.7) have been fabricated by solid state reaction method and spark plasma sintering. The scanning electron microscope images indicate all samples are compact and the average particle size increases with the Te doping fraction. The carrier concentration and electrical conductivity exhibit positive doping fraction dependence, and a maximum electrical conductivity of 16.29?×?10⁴?Sm^?1 is obtained at 300?K for Co₄Sb_11.3Te_0.7. The values of the power factor (x?=?0.4–0.6) are greater than 4.0?×?10^?3?Wm^?1?K^?2 at the temperature range of 650–800?K, larger than previous literature reports. The lattice thermal conductivity decreases monotonously over the whole investigated temperature range and exhibits a negative doping fraction dependence except for Co₄Sb_11.3Te_0.7. The resultant dimensionless figure of merit of all the samples increases monotonously over the whole investigated temperature range, and a maximum value of 0.95 is achieved at 800?K for Co₄Sb_11.4Te_0.6.     

催化氧化深度处理印染废水的研究

采用以γ-Al2O3为载体,由含稀土元素为主的过渡金属和多种组分混合型金属元素制备的催化剂,通过催化氧化试验装置,对纺织印染废水的二级处理出水进行中试深度处理研究,反应温度60～80℃;常压处理,废水处理后,COD和色度去除率可达80%以上,处理出水可满足达标排放和回用的要求.     

建筑陶瓷快烧无光釉的研制

实验以CaO-Al2O3-SiO2系统为主要研究对象,以生料形式引入,通过单因素法探讨了长石、硅酸锆以及滑石和氧化锌的含量对釉面效果的影响。该无光釉适合在1180℃快速烧成,其釉面光泽度为14%,白度高达85%,热稳定性经20～250℃六次不裂,防污能力好。     

"武汉化工区"发展模式及乙烯下游产品开发之思考

结合建设中的80万t／a乙烯工程及“武汉化工区”．探索化工区建设的发展理念和总体模式．提出了“产品项目一体化、公用辅助一体化、物流传输一体化、环境保护一体化、管理服务一体化”的管理模式,并讨论了武汉化工区的技术服务内容。在80万t／a乙烯工程一次产品方案的构思下．探讨了以环氧乙烷、丙烯酸、碳五馏分和重芳烃为原料的下游产品开发技术。     

The Acute Liver Injury in Mice Caused by Nano-Anatase TiO2

Although it is known that nano-TiO₂ or other nanoparticles can induce liver toxicities, the mechanisms and the molecular pathogenesis are still unclear. In this study, nano-anatase TiO₂ (5 nm) was injected into the abdominal cavity of ICR mice for consecutive 14 days, and the inflammatory responses of liver of mice was investigated. The results showed the obvious titanium accumulation in liver DNA, histopathological changes and hepatocytes apoptosis of mice liver, and the liver function damaged by higher doses nano-anatase TiO₂. The real-time quantitative RT-PCR and ELISA analyses showed that nano-anatase TiO₂ can significantly alter the mRNA and protein expressions of several inflammatory cytokines, including nucleic factor-κB, macrophage migration inhibitory factor, tumor necrosis factor-α, interleukin-6, interleukin-1β, cross-reaction protein, interleukin-4, and interleukin-10. Our results also implied that the inflammatory responses and liver injury may be involved in nano-anatase TiO₂-induced liver toxicity.     

存在软弱下卧层的大直径扩底桩桩端承载力的实用算法

基于半无限空间内部点荷载作用下应力分布的Mindlin解答,提出一种确定存在软弱下卧层的大直径扩底桩桩端承载力特征值的实用方法。首先,利用圆形均布荷载作用下的Mindlin解,推求扩底桩桩端底面的附加应力公式。然后根据规范给出的单桩沉降计算公式确定扩底桩的最终沉降计算公式。最后,根据扩底桩沉降的容许值反算桩端底面的附加应力,进而确定扩底桩的端承力。通过工程实例,将计算结果与实测数据进行对比,两者吻合较好。     

钢管混凝土拱桥管内混凝土密实性的声波检测控制

本文通过一工程实例具体说明如何采用声波透射法实现对钢管混凝土拱桥管内混凝土密实性的检测控制。     

基于FPGA的LED体三维显示方案研究

基于人眼视觉暂留特性及LED的高速发光特性,设计了一套LED体三维显示系统.首先利用Matlab生成三维数据,通过红外模块传输到显示驱动电路;其次快速旋转LED阵列,由角度编码器获取旋转角度值,并根据角度值计算对应的二维截面图形;最后通过调制LED的发光与消隐实现相应的显示.该系统基于24×16二维LED阵列,具有69 120个体像素,实现了空间尺寸为φ94.4 mm×66.8 mm的稳定柱体内三维显示.     

一种用于多模宽带无线接收机的2.1-6GHz频段锗硅BiCMOS低噪声放大器设计

本文提出了一种带ESD保护的,用于多模宽带无线接收机的锗硅BiCMOS低噪声放大器。该放大器基于0.18μm锗硅BiCMOS工艺实现,覆盖频率范围达到2.1-6GHz。经过优化噪声模型及电路分析设计,最终的测试结果表明,在整个带宽上低噪声放大器的增益达到12dB,输入三阶交调点为在6GHz处-8dBm,噪声系数为2.3～3.8dB。电路供电电压为2.5V,总功耗为8mW,ESD保护电路可以提供2kV的人体击穿模型电压。