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铁路新型转线装置工作原理与施工技术研究
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作者 武振亚 《国防交通工程与技术》 2011年第2期40-42,共3页
转线装置主要用于既有线与施工便线之间的反复连接,即通过安装转线装置的置换头轨和尾轨,将营业线和便线连通,使得运输车可以顺利进入便线;要点结束后则拆除转线装置的置换头轨和尾轨部件,恢复既有营业线行车。相对于传统的正线间牵引... 转线装置主要用于既有线与施工便线之间的反复连接,即通过安装转线装置的置换头轨和尾轨,将营业线和便线连通,使得运输车可以顺利进入便线;要点结束后则拆除转线装置的置换头轨和尾轨部件,恢复既有营业线行车。相对于传统的正线间牵引出便线的拨接、插入道岔等方法,此方法具有成本低、耗时少、影响范围小等特点。介绍了应用新型转线装置与既有正线连接的工艺流程与关键施工技术,对同类工程有借鉴意义。 展开更多
关键词 线 便线 转线装置 置换头轨 置换尾轨 既有短轨
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Semiconductor nanowires for photovoltaic and photoelectrochemical energy conversion 被引量:8
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作者 Nell P. Dasgupta Peidong Yang 《Frontiers of physics》 SCIE CSCD 2014年第3期289-302,共14页
Semiconductor nanowires (NW) possess several beneficial properties for efficient conversion of solar energy into electricity and chemical energy. Due to their efficient absorption of light, short distances for minor... Semiconductor nanowires (NW) possess several beneficial properties for efficient conversion of solar energy into electricity and chemical energy. Due to their efficient absorption of light, short distances for minority carriers to travel, high surface-to-volume ratios, and the availability of scalable synthesis methods, they provide a pathway to address the low cost-to-power requirements for widescale adaptation of solar energy conversion technologies. Here we highlight recent progress in our group towards implementation of NW components as photovoltaic and photoelectrochemical energy conversion devices. An emphasis is placed on the unique properties of these one-dimensional (1D) structures, which enable the use of abundant, low-cost materials and improved energy conversion efficiency compared to bulk devices. 展开更多
关键词 NANOWIRE photovoltaics artificial photosynthesis PHOTOELECTROCHEMISTRY solar energy
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