基于移动互联的继电保护移动作业平台设计

文章利用移动互联技术,通过搭建"移动终端-主站"软硬件平台,将传统继电保护作业中涉及的文本编辑、业务流转、作业审核、安全监督、资料整理等作业环节进行数字化改造,通过开发作业文本管理模块、安措票管理模块、设备检修缺陷管理模块,实现移动作业终端与现场作业的无缝衔接.继电保护从业人员可通过主站联动方式,提升继电保护作业的工作效率和智能化水平.     

日本真空断路器的发展与现状

由于真空断路器具有开断大电流、体积小、成本低等许多优点，势必取得越来越广泛的应用。介绍了真空断路器在日本的发展，叙述了其发展的成果以及21世纪工程发展的主题，包括：物资的回收。人类的安全及真空断路器的无火灾等特点。展现了日本真空断路器的发展趋势及目前的应用。     

烟草生产环境监测系统的开发与应用

开发了一个烟草生产环境监测系统,该系统可对烟草生产过程中环境温度、湿度、降雨量、日照全辐射和紫外辐射进行监测.系统测试的数据可通过GSM网络传送到数据巾心,用户可通过访问数据中心服务器查询到相关的生产环境数据;为保证数据的安全性,系统采集到的数据还被保存到SD卡上;可将多个系统组建成为一个监测网络,用于对多个生产基地生产环境进行动态监测;监测系统已经在红塔集团烟叶基地部署了20台,并正常运行半年;系统的部署,为企业原料采购提供重要的决策支持.     

微功耗永磁式接触器的研究

永磁式接触器与传统电磁式接触器相比具有:节能,可靠性高,无噪声污染等优点.本文对电磁式接触器和永磁式接触器的静态磁场特性进行了计算分析,计算结果可为永磁式接触器的开发提供了强有力的技术支持,并大大缩短产品的开发周期,降低开发成本.     

扩散温度和时间对晶体硅太阳电池性能的影响

研究了薄层方块电阻对单晶硅太阳电池的开路电压(Voc)、短路电流(Isc)、填充因子(FF)和转换效率(η)的影响。通过控制扩散温度和时间制备了具有不同薄层方块电阻的单晶硅太阳电池。结果表明:当扩散温度和时间分别为863℃和1 050 s时,电池性能得到了有效的改善,其平均开路电压、短路电流、填充因子和转换效率分别为0.64 V,5.58 A,0.755和17.3%。     

基于电磁斥力机构的快速接地开关的仿真与设计

快速接地开关通过装置的快速动作形成的金属性短路熄灭故障电弧,从而保障设备以及人身安全。通过理论分析以及有限元仿真软件（ansoft）研究了快速接地开关最重要的两部分：电磁斥力机构以及永磁保持机构。通过改变电磁斥力机构的结构和电气参数获得了这些参数之间的关系并且设计了新型快速接地开关。仿真结果表明,样机的反应以及合闸时间都与设计相符,达到了快速接地开关的设计要求。     

SD5切丝机进刀机构的改进

为解决SD5切丝机切丝刀片因单次进刀量不固定而导致刀片和磨刀砂轮磨损快等问题,对进刀机构进行了改进。通过将回转体上的滑块槽改为固定轴,使滑块固定在回转体上并随销轴转动;在进给杆上加工滑块槽,使滑块在槽中滑动时带动回转体旋转;由回转体驱动推刀块运动完成进刀,实现切丝过程中单次进刀量恒定。以青岛卷烟厂使用的2台SD504切丝机为对象进行测试,结果表明:改进后刀片和砂轮平均使用寿命分别延长31.2%和7.2%。该技术可为提高SD5系列切丝机生产稳定性提供支持。      

TiO_2纳米管复合列阵材料的制备及其应用研究进展

阳极氧化制备的TiO₂纳米管列阵由于具有独特的、高度有序的列阵结构,制备工艺简单,成本低廉,已经发展成为重要的无机功能材料。在TiO₂纳米管内外复合其它纳米材料以构成一种特殊的异质结复合结构可以提高其性能,拓展其应用空间。本文基于国内外最新研究进展,系统综述了采用金属、半导体、有机物对TiO₂纳米管列阵修饰而得的复合纳米材料,及其化学、电化学和物理的方法;并介绍其在光催化降解污染物、太阳能电池、生物传感器方面的潜在应用,提出了未来的发展方向。     

Characterization of proso millet starches from different geographical origins of China

The influence of geographical origin (Lvliang, Baotou, Gulang, and Jilin) on the physicochemical properties of proso millet (Panicum miliaceum L.) starches from China, and starch chemical compositions were studied. Scanning electron microscopy showed that starch granules from millet starches were polygonal and spherical with smooth surfaces with sizes ranging from 2.5 to 12 μm. X-ray diffraction showed that millet starches were typical of A-type starch granules with a mean crystallinity of 35.81%. The transition temperatures (T _o , T _p , and T _c ) and enthalpy of gelatinization (ΔH) of Lvliang, Baotou, Gulang, and Jilin proso millet starches were 66.81 to 70.01°C, 72.79 to 76.55°C, 78.30 to 82.44°C, and 10.4 to 14.46 J/g, respectively. Significant differences (p<0.05) were observed for the amylose content, granule size, peak temperature, gelatinization enthalpy, and peak viscosity temperature among the millet starches. Millet starches may have potential applications in production of puffed starch food products and other food items.     

Novel high performance functionalized ladderlike polyphenylsilsesquioxane/bismaleimide hybrids with very good flame retardancy,thermal, and dimensional stability

Novel high performance hybrids (N-PPSQ/BDM/DBA) with very good flame retardancy, thermal, and dimensional stability as well as low dielectric constant and loss were developed, which consist of 4,4′-bismaleimidodiphenyl methane/2,2′-diallyl bisphenol A (BDM/DBA) resin and a novel functionalized ladderlike polyphenylsilsesquioxane (N-PPSQ). N-PPSQ was synthesized through the hydrolysis and condensation between phenyltrimethoxysilane and γ-aminopropyl triethoxysilane, and its structure was characterized by X-ray diffraction, nuclear magnetic resonance, gel permeation chromatography, and Fourier transform infrared. Compared with BDM/DBA resin, N-PPSQ/BDM/DBA hybrids show significantly improved integrated performances including remarkably reduced dielectric constant and loss, significantly improved flame retardancy, thermal, and dimensional stability, showing great potential for applications having harsh requirements in integrated performances. For example, in the case of the hybrid with 15 wt% N-PPSQ, its coefficient of thermal expansion in glassy and rubbery state are only about 49 and 42% of that of BDM/DBA resin, respectively; its limiting oxygen index increases from about 26.1–42.1%; while its dielectric loss is only about 87% of that of BDM/DBA resin at 1 kHz. These attractive improved properties are attributed to the variety in the cross-linked structure induced by the presence of N-PPSQ.