现浇有网聚苯乙烯板外墙外保温抗裂施工技术

外墙保温面层裂缝是保温建筑的质量通病，防裂性能是墙体保温体系要解决的关键技术之一。介绍一种既经济，又能有效解决有网聚苯乙烯板抹灰找平层开裂，减轻面层荷载，提高保温体系安全性及解决“热桥”等问题的施工技术。     

风味黄瓜鱼肉干系列产品研制

将浆鲜鱼肉切成条状作为主料，在其中分别加入不同的辅料，运用新工艺可以生产出风味各异的五香型、麻辣型、咖喱型、香辣型黄瓜鱼肉干系列产品。     

基于PLC的挖掘机司机用减震座椅模糊控制系统

利用可编程序控制器S7-200作为主控制器,以加速度作为输入信号,通过对气体回路实施模糊控制,实现挖掘机司机座椅的减震.实践证明,这是一种简便可靠、经济实用的控制系统.     

China‘s Wind Power Development in 2008

This paper summarizes the basic situation of the wind power development in China in 2008,and carries out a brief analysis of the proportion of the nationwide wind power to the global wind sector as well as to the total installed capacity in the country. By reviewing the remarkable achievements in China‘s wind power development since the enforcement of the Renewable Energy Act of the People‘s Republic of China,some issues concerning the policy effect and wind power development are touched on.     

变压器专用密封材料的研制

油浸式变压器密封材料性能优化是解决变压器漏油故障的重要途径。分析了变压器密封材料老化原因,提出了变压器密封材料应具有的性能要求,并以此为目标研发了变压器专用的密封材料软木橡胶。详细叙述了软木橡胶的特性,通过试验表明,软木橡胶是一种性价比高的优良新型变压器专用密封圈材料,用这种新型材料制成的变压器密封圈已获得了国家专利。该材料还可用于其他电气设备。     

八乙烯基笼形倍半硅氧烷(OvPOSS)的合成、表征

本实验以乙烯基三氯硅烷和乙烯基三甲氧基硅烷作为前驱体,利用直接水解法合成了八乙烯基笼形倍半硅氧烷(Ov POSS),并计算了产品的收率,表征了产品的结构。两种前驱体制备的目标产物的收率分别为26.90%和12.46%,通过29Si NMR、XRD和FT-IR表征均证实产物为Ov POSS。     

改性木素磺酸盐泵送剂GCL1-3的制备及性能研究

通过研究缓凝高效减水剂GCL1与保水剂、引气剂的配伍性能 ,研制了混凝土泵送剂GCL1- 3。GCL1与保水剂HEC、引气剂复配时 ,改善了水泥净浆的保水性能 ,提高了硬化水泥的早期及后期抗压强度。实验测试了GCL1- 3的水泥净浆流动度、减水率、流动度损失和抗压强度等性能。结果表明 ,当w (水 )∶w(水泥 ) =0 4∶1 0 ,w (GCL1- 3) =0 .5 %时 ,水泥净浆流动度可达2 30mm ,减水率达 18% ,且无离析现象 ;2h内流动度损失仅为 2 4% ,而掺FDN的净浆已经失去流动性 ;w(GCL1- 3) =0 .5 %时 ,水泥净浆硬化 3d、7d、2 8d的抗压强度比分别达 146 %、15 8%与148% ,均高于使用FDN     

Preparation,characterisation, antioxidant and antiglycation activities of the novel polysaccharides from the pileus of Dictyophora rubrovolvata

The polysaccharides from the pileus of Dictyophora rubrovolvata (DPP) were extracted by ultrasonic‐assisted extraction (UAE) and the operating parameters were optimised by orthogonal experiment. The polysaccharides were separated and purified by DEAE‐52 and Sephadex G‐100 column chromatography to obtain two fractions of DPP‐1s and DPP‐2s. The average of molecular weights, monosaccharide compositions, antioxidant and antiglycation activities of DPP‐1s and DPP‐2s were investigated. The results showed DPP‐1s and DPP‐2s had high inhibitory effects on oxidation and glycation, and DPP‐2s showed stronger bioactivity than DPP‐1s, which might be due to their differences in the molecular weight and uronic acid content. Furthermore, the UV and FTIR spectra were used to evaluate the characterisations of DPP‐2s, which demonstrated that DPP‐2s had no protein and nuclear acid with the pyranose ring structure. This study indicated that DPP‐2s could be used as a source of natural antioxidant and antiglycation components.     

Efect of residual Al content on microstructure and mechanical properties of Grade B+Steel for castings for locomotives简

The bogie made of Grade B＋ steel is one of the most important parts of heavy haul trains. Some accidents were found to be the result of fracture failure of the bogies. It is very important to find the reason why the fracture failure occurred. Because AI was added for the final deoxidation during the smelting process of the Grade B＋Steel, residual AI existed to some extent in the castings. High residual AI content in the bogie casting was presumed to be the reason for the fracture. In this work, the influence of residual AI content in the range of 0.015wt.% to 0.3wt.% on the microstructure and mechanical properties of the Grade B＋ Steel was studied. The experimental results showed that when the residual AI content is between 0.02wt.% and 0.20wt.%, the mechanical properties of the steel meet the requirements of technical specification for heavy haul train parts, and the fracture is typical plastic fractures. If the residual AI content is less than 0.02wt.%, the microstructures are coarse, and the mechanical properties can not meet the demand of bogie steel castings. When the residual AI content is more than 0.2wt.%, the elongation, reduction of area, and low-temperature impact energy markedly deteriorate. The fracture mode then changes from plastic fracture to cleavage brittle fracture. Therefore, the amount of AI addition for the final deoxidation during the smelting process must be strictly controlled. The optimum addition amount needs to be controlled within the range of 0.02wt.% to 0.20wt.% for the Grade B＋Steel.