用于相变存储器的W亚微米管加热电极性能

为了降低C-RAM器件的操作电流,利用0.18μm标准CMOS工艺线制备出外径为260nm的W亚微米管加热电极,并对其进行了电学性能的表征.使用W亚微米管加热电极制备出C-RAM器件,并通过疲劳特性测试分析了器件失效的原因.结果表明,W亚微米管具有良好的电学稳定性和疲劳特性,为降低C-RAM器件的操作电流提供了一种非常有效的途径.     

碳纤维水泥基复合材料电阻变化规律研究

研究了碳纤维水泥基复合材料在水化期间及固化后的电阻变化特性。研究发现：当碳纤维体积分数较低时，试样的电阻率随着固化时间的增大而明显增大；反之，当碳纤维体积分数超过某一个范围后，会出现电阻（率）随水化时间的延长而变小的规律。此外，对于已固化好的碳纤维水泥基复合材料，随着电流（电压）的增大，电阻会出现一定程度的降低，碳纤维体积分数越低（即电阻率越大时），电阻下降的趋势越明显。     

低压配电智能监控终端的设计与实现

阐述了低压配电系统无功补偿的现状和特点,分析了无功补偿方式和低压终端无功补偿的特殊性.介绍了面向该应用对象的基于PIC单片机的配电智能监控终端设计.该配电智能监控终端具有高性能、低价位、高可靠性和配置灵活等特点.     

定子接地基波零压和20Hz低阻保护的一些问题探讨

定子绕组接地故障是发电机易发的故障,现在一些大型机组在对定子接地保护配置时,要求以基波零序电压保护和20Hz电源注入式低阻保护构成发电机定子接地保护方案,尤其是大型水轮发电机组。本文在叙述了两种保护的基础上,对这两种保护的实现方式,相关定值的整定方法及联系,以及两种保护之间的联系作了一些探讨,以期这两种保护能更好的配合。     

电力工程项目经济效益评价

通过对电网经济效益评价的内容、方法、指标体系的分析,结合具体的工程实践,评估了太原市城网经济效益。     

Influence of plasma treatment on CNT absorption of cotton fabric and its electrical conductivity and antibacterial activity

In this study, effect of plasma pretreatment on the absorption of carboxilated carbon nanotubes (CNTs) on the surface of cotton fabrics was investigated. Treated samples were characterised using a Raman spectrophotometer. Also, the morphological properties of samples were studied using a scanning electron microscope. Electrical resistance and interactions between CNTs and plasma-treated cotton functional groups at the surface were also evaluated. Antibacterial activity of cotton fabric when modified by low temperature plasma and stabilised with CNTs was also investigated. Results showed a uniform coating of CNTs on the plasma-treated cotton fabric and it was found that the plasma treatment is effective on improving CNTs absorption by cotton fabric. Generally, cotton fabric characterisation, such as antibacterial activity and electrical conductivity, after plasma treatment and loading CNT are improved.     

择优蚀坑表征立方晶系冷轧电工硅钢取向性

为确定电工硅钢的晶粒取向性,应用蚀坑技术研究了冷轧无取向硅钢、取向硅钢因择优腐蚀所形成的蚀坑与晶粒取向的关系,分析了{100}面系蚀坑形貌的演变过程,从晶体学角度建立了蚀坑形貌与晶面指数的对应关系.结果发现:无取向硅钢形成不同形貌的蚀坑,其晶面指数为(001)、(011)和(111),或是由它们演变形成的其他晶面指数;取向硅钢形成的蚀坑为同一类型,晶面指数为(011)或由其演变形成的其他晶面指数;晶界也会形成蚀坑,其形貌与相邻晶粒间的取向差有关,取向差大,形成{100}、{110}和{111}面系的蚀坑,取向差小,形成{110}面系的蚀坑.取向硅钢的蚀坑分布具有连续性,晶界的存在并不改变蚀坑的基本特征;取向硅钢蚀坑的底棱相互平行,相差不超过5°,底棱延伸方向与硅钢的轧制方向即[001]方向一致,偏离角度不超过5°.     

电连接器接触件应力场的数值分析与试验验证

利用ANSYS对某型号电连接器接触件应力场进行分析,以寻找应力变化规律.对接触件应力场分布特点、插孔形变、接触压力随温度升高的变化规律进行了仿真研究,并进行数据分析与接触压力的试验验证.结果表明:随着温度升高,插孔最大形变量增加,最大接触压力和接触压力区域都有所减少;尺寸较小的接触件插孔槽缝底部最大等效应力随温度升高增幅较大,交变载荷作用时易出现疲劳、破裂等,属产品失效薄弱点.通过分析得知最大等效应力值随温度上升而变化的趋势取决于温度软化效应和热应力增强作用的综合结果;仿真结果能较好地反映电连接器的工作应力状态,接触压力试验验证了有限元仿真方法的可行性.     

Enhanced electrical and thermal conductivity of modified poly(acrylonitrile-co-butadiene)-based nanofluid containing functional carbon black-graphene oxide

Solution refluxing and high-pressure homogenization technique were reported for synthesizing nanofluids based on modified poly(acrylonitrile-co-butadiene) (M-PANB) as base fluid and carbon black (CB)/carbon black-graphene oxide (CB-GO) as filler. The physiochemical properties were studied to analyze the structure, morphology, thermal and electrical conductivity. FTIR analysis corroborated the structure of CB-GO nanobifiller and nanocomposite. Microstructure analysis of M-PANB/CB-GO revealed good dispersion of CB-GO nanosheets, while CB series showed granular distribution. XRD studies confirmed amorphous structure of M-PANB/CB-GO nanocomposite. Thermal conductivity of nanofluid was found to increase upto 1.41 W/mK for 10 wt.% CB-GO loading and electrical conductivity was increased to 2.5 × 10^?3 Scm^?1.     

Selective disassembly planning for waste electrical and electronic equipment with case studies on liquid crystaldisplays

Waste Electrical and Electronic Equipments (WEEEs) are one of the most significant waste streams in modern societies. In the past decade, disassembly of WEEE to support remanufacturing and recycling has been growingly adopted by industries. With the increasing customisation and diversity of Electrical and Electronic Equipment (EEE) and more complex assembly processes, full disassembly of WEEE is rarely an ideal solution due to high disassembly cost. Selective disassembly, which prioritises operations for partial disassembly according to the legislative and economic considerations of specific stakeholders, is becoming an important but still a challenging research topic in recent years. In order to address the issue effectively, in this paper, a Particle Swarm Optimisation (PSO)-based selective disassembly planning method embedded with customisable decision making models and a novel generic constraint handling algorithm has been developed. With multi-criteria and adaptive decision making models, the developed method is flexible to handle WEEE to meet the various requirements of stakeholders. Based on the generic constraint handling and intelligent optimisation algorithms, the developed research is capable to process complex constraints and achieve optimised selective disassembly plans. Industrial cases on Liquid Crystal Display (LCD) televisions have been used to verify and demonstrate the effectiveness and robustness of the research in different application scenarios.