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In-situ Monitoring the Setting Behavior of Foamed Concrete Using Ultrasonic Pulse Velocity MethodSHE Wei1,2,ZHANG Yunsheng1,JONES MR2,GUO Panpan11. Jiangsu Key laboratory for Construction Materials,Southeast University2. Concrete Technology Unit,Division of Civil Engineering,University of Dundee摘 要:......
新型高能效环境相容性钢铁生产--印度实例分析 Mr.J.P.N.Lal1,Mr.J.K.Tandon1,P.K.Sarkar1 (1.Jindal Vijiayangar Steel Limited) 摘要:对于一个现代化钢铁联合企业,高能效洁净技术的采用需要一个系统考虑.费用的不断提高,能源的供应不足,以及控制污染新要求的提出,仍然是钢铁工业发展的最大阻碍.只有对钢铁的生产进行能源有效利用和环境相容性技术的新型协调规划才能将钢铁生产带回到往日的辉煌.Jindal Vijiayangar钢铁联合企业(JVSL)的洁净钢倡议是通过将当地的技能和设备与新型的高能效洁净技术相结合以强调印度的具......
and Information Technology, Liaocheng University, Liaocheng 252059, China) Abstract:The anisotropic magnetoresistance (MR) of La2/3Ca1/3MnO3 (LCMO)/YBa2Cu4O8 (YBCO) /LCMO sandwiches on (001) SrTiO3 were investigated. Single layer LCMO and sandwiches show in-plane anisotropy of MR. MR strongly depends on the magnetic field direction. A nearly sinusoidal dependence on the angle between the applied......
Fex-C1-x/Si颗粒膜的巨磁电阻效应 章晓中1,薛庆忠1 (1.清华大学材料科学与工程系先进材料教育部重点实验室,北京,100084) 摘要:利用激光脉冲沉积(PLD)方法制备了沉积于硅基片上的掺杂过渡金属的非晶碳膜结构Fex-C1-x/Si.Fex-C1-x/Si的磁电阻(MR)可正可负,随温度而变化.当温度T＜258 K时,Fe0.011-C0.989/Si的MR为负值;当258 K＜T＜340 K时,该材料的MR为正值,在室温磁场为1 T时,该材料的正MR可以大于20%.且在不同的温度范围中,该材料的MR和外加磁场的依存关系呈现出不同的特点:在T=280和300 K时,当磁场小于1 T时,MR随磁场的增加而快速增加,之后随磁场的继续增加MR增加开始变得缓慢;在T=350 K时,MR近似以磁场的B1.5的规律变化;而在T=30 K时,MR为负值且其大小随磁场的增加而减小......
磁流变液在结构振动控制中的应用与研究进展 李忠献1,刘建军1 (1.天津大学建筑工程学院,天津,300072) 摘要:磁流变(MR)液是结构振动控制系统中最具发展前景的一种新型智能材料.在简要阐述MR液基本特性的基础上,介绍了MR液在结构振动控制中的应用进展,并分析探讨了结构振动环境对MR液的具体性能要求,再分别从长效性,稳定性,屈服强度和阻尼调幅等方面,系统阐述了MR液的研究进展,最后总结了MR液在结构振动控制应用中存在的问题和未来研发的方向. 关键词:磁流变液; 智能材料; 结构振动控制; 长效性; 稳定性; 屈服强度; 阻尼调幅; [全文内容正在添加中] ......
磁流变液及其阻尼器的制备与性能研究 许帅1,张清杰1,瞿伟廉1,官建国1,程海斌1,张剑1,涂建维1 (1.武汉理工大学,材料复合新技术国家重点实验室,湖北,武汉,430070) 摘要:研究了一种新型MR液和MR阻尼器;用振动样品磁强计测试了MPS-MRF-25羰基铁粉的磁性能;用磁流变仪测试了MR液的表观粘度和磁致剪切应力;用静置沉降法分析了MR液的抗沉降稳定性;用电液伺服材料性能试验机测试了MR阻尼器的性能.结果表明MPS-MRF-25羰基铁粉具有优良的磁性能;以其制备的MR液具有较好的抗沉降稳定性和温度稳定性;MR阻尼器在2A电流下可以达到15kN的阻尼力. 关键词:磁流变液; 阻尼器; 剪切应力; 羰基铁粉; [全文内容正在添加中] ......
, Jiaxing 314001, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: A semi-active magneto-rheological (MR) damper was experimentally investigated and compared... the vehicle suspension. On-off skyhook controller and Fuzzy-Lyapunov skyhook controller (FLSC) were employed to control the input current for MR damper so as to achieve the desired damping force. Tests......
of steel-spring floating slab track(FST), semi-active magneto-rheological(MR) damping technology was embedded with FST. A vertical dynamic model involving vehicle and steel-spring FST isolated by MR dampers was established, and a numerical simulation method for semi-active on-off ground-hook control strategy of MR damper was also proposed. Based on the dynamic model and simulation method, the non......
混合现实技术在钢铁行业中的应用前景张波河钢唐钢信息自动化部不锈钢站摘 要:MR技术能将真实世界信息和虚拟世界信息"无缝"集成,很多领域引用了这项技术,收到了很好的效果.因此,MR技术在钢铁行业中将被赋予更多的期待.关键词:虚拟现实;增强现实;混合现实;......
-beam evaporation. It was found that a Si spacer (≥0.9nm) could greatly decrease the interlayer coupling in Co/Si/Co sandwiches and there was no magnetoresistance(MR) or spin-valve MR in them due to the high resistivity of Si spacer. While in Co/Si/(Co/Cu/Co) multilayers, we observed a spin-valve MR of about 0.5% through a nominal 2.7nm Si spacer at room temperature. The spin-valve MR in Co/Si/(Co......
