空气包缠加工和常规包覆加工

空气包缠加工和常规包覆加工的目的都是努力把两根或两根以上具有不同性能的纱组合起来,生产出一种同时具有这些不同性能的复合纱线.然而,这两种方法涉及的主要是把复丝与弹力纱结合起来.尽管空气包缠纱比常规包覆纱价格便宜,但它们仅在一些特定的用途上代替了后者.目前,

高速列车制动机

本文在提出对高速旅客列车制动装置的要求之后,对八种基础制动的性能和功率限度分别做了估价。简述ICE列车制动方式组合后得出结论:高速列车制动机在任何气候条件下制动距离不应超过计算值,同时制动装置的过载和磨耗应该最小。

高压标准电容器电压与电容量关系的确定

【正】 1.前言如果不能得到一种众所周知的参考标准,那么,便不可能借助通常的电桥电路来确定高额定电压标准电容器的电压与电容量的依赖关系。迄今为止。

Development of Oxide Ceramics for Application in Solid Oxide Fuel Cells

1 Results Solid oxide fuel cells (SOFC) are ceramic fuel cells that convert chemical into electrical energy in a temperature region between 650 ℃ and 1 000 ℃.Systems are currently under development for a variety of applications e.g. for both small and large scale stationary combined heat and power systems but also for the supply of electrical energy in the automotive area. The current objectives in the development of SOFCs is to lower the operating temperature from 850 ℃ down to below 750 ℃ in order to ...