纳米二氧化钛光催化降解有机磷农药的研究

纳米TiO2在光催化降解水中有机污染物方面具有明显的优势,以锐钛矿型纳米TiO2（简称nm A-TiO2型）降解有机磷农药为研究对象,分别对nm A-TiO2用量,PH值、外加氧剂、光源对降解率的影响进行研究,结果表明,nm A-TiO2降解有机磷农药是有效的。     

Identification of Anamorph Yeast of Tremella aurantialba and Optimization of Medium Composition for Production of Exopolysaccharides

A yeast-like fungus strain B1 isolated from wild fungus Tremella aurantialba was identified and initially characterized. Two phylogenetic trees were generated based on the sequences of large subunit ribosomal RNA gene D1/D2 regions and internal transcribed spacer (ITS) regions of related fungi, respectively. The analysis of D1/D2 regions and ITS sequences showed that fungus B1 was clustered together with T. aurantialba, T. aurantia and T. microspore in the phylogenetic trees. Both the morphological characteristic and phylogenetic analysis established that fungus B1 was one of the anamorph strains of T. aurantialba and belongs to Tremella genus. A fermentation medium for exopolysaccharides (EPS) production by T. aurantialba B1. Plackett-Burmen design was used to evaluate the effects of different components in the culture medium. Glucose and yeast extract have significant influence on the EPS production. The concentrations of two factors were optimized subsequently using central composite design and response surface analysis. The results showed that 49.2 g/L glucose and 10.4 g/L yeast extract could lead to the maximum production of EPS (4.99 g/L). The optimized medium led to a 1.5-fold enhancement of the production of EPS by T. aurantialba B1, as compared with that without optimization.     

武汉火车站钢结构抗振幕墙施工技术

武汉火车站是国内首座采用“桥建合一”结构形式的高铁站,为保证幕墙全使用期的安全性,在设计上采用抗放结合的抗振设计理念.高速列车轨道梁底部玻璃幕墙根据消减竖向振动要求,采用黏弹性阻尼机构,将竖向机械动荷载转化为竖向摩擦力.东西广厅钢结构抗振玻璃幕墙系统采用双层受力系统,内层主体钢结构形成一个整体的框架,使幕墙在振动过程中基层钢结构整体位移.顶部设置黏弹性阻尼机构或双铰摇臂机构吸收振动能量,最大限度地减少主体结构的振动对玻璃幕墙的影响,从而实现幕墙抗振的目的.     

串联型电能质量补偿器主电路设计方案

串联型电能量补偿器能有效抑制系统电压跌落和消除电压谐波，对提出电能质量具有重要意义。文中介绍了串联型电能质量补偿器主电路的基本结构，结合实验样机的研制对主电路各部分设计方案进行了分析比较。提出了逆变器电路结构、运行方式及控制策略的设计，讨论了串联变压器和输出滤波器对装置性能的影响，比较了3种直流储能方式的优劣。为类似装置主电路最佳方案的设计提供了依据。     

图形方式短路电流计算软件的研究

介绍了华东电网图形方式短路电流计算软件的技术特色，包括系统菜单的功能和实现，电网 系统图的绘制及转换方法，电网图上短路电流显示位置的坐标确定方法，厂站分排的设计和 实现方案等。