期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
梨树主干与叶面积及总枝量的相关分析 被引量:4
1
作者 黄景云 公庆党 +2 位作者 房义福 赵云朝 李冬雪 《经济林研究》 1996年第A00期144-145,共2页
梨树主干与叶面积及总枝量的相关分析黄景云,公庆党,房义福,赵云朝,李冬雪(山东省林业厅济南,250014)(济南市苗圃)有关梨树各器官之间相关性的研究较多。以往的研究把叶/果作为合理负荷和修剪的指标,并提出梨树适宜的... 梨树主干与叶面积及总枝量的相关分析黄景云,公庆党,房义福,赵云朝,李冬雪(山东省林业厅济南,250014)(济南市苗圃)有关梨树各器官之间相关性的研究较多。以往的研究把叶/果作为合理负荷和修剪的指标,并提出梨树适宜的叶/果为20—30。这一相关指标仅... 展开更多
关键词 梨树 干断面积 面积 总枝量 相关分析
全文增补中
Strain Sensitivity Enhancement in Suspended Core Fiber Tapers 被引量:1
2
作者 Ricardo M. ANDRE Susana O. SILVA +5 位作者 Martin BECKER Kay SCHUSTER M. ROTHARDT H. BARTELT Manuel B. MARQUES Orlando FRAZAO 《Photonic Sensors》 SCIE EI CAS 2013年第2期118-123,共6页
Suspended core fiber tapers with different cross sections (with diameters from 70μm to 120 μm) are produced by filament heating. Before obtaining the taper, the spectral behavior of the suspended core fiber is a m... Suspended core fiber tapers with different cross sections (with diameters from 70μm to 120 μm) are produced by filament heating. Before obtaining the taper, the spectral behavior of the suspended core fiber is a multimode interference structure. When the taper is made, an intermodal interference between a few modes is observed. This effect is clearly visible for low taper core dimensions. Since the core and cladding do not collapse, two taper regions exist, one in the core and the other in the cladding. The cladding taper does not affect the light transmission, only the core is reduced to a microtaper. The spectral response of the microtaper based-suspended core fiber is similar to a beat of two interferometers. The strain is applied to the microtaper, and with the reduction in the transverse area, an increase in sensitivity is observed. When the taper is immersed in a liquid with a different index of refraction or subjected to temperature variations, no spectral change Occurs. 展开更多
关键词 Optical fiber sensor TAPER microstructured fiber
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部