The optimum fiber proportion of bamboo's fiber reinforced polypropylene composite could be analyzed accurately by optimum design method of principal component analysis.
用多元统计分析中的主成分分析法，合理地确定竹纤维增强聚丙烯复合材料多项性能指标兼优的最佳纤维含量。
Applications of optical fiber delay lines in radio electronic equipment are described. A number of typical optical fiber delay lines and their principal properties are analysed.
本文简述了光纤延迟线在无线电电子设备中的应用概况，分析了几种典型的光纤延迟线及其基本特性。
Starting from the ray path equation, object-image relationships are found and used to determine the equivalent focal length and the principal planes of tapered GRIN fiber.
本文从光线轨迹方程出发，推导了锥形梯度折射率纤维的物像关系式，并得出了它的等效焦距和主平面位置。
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