Purpose: The aim of this paper was to examine the distribution of macular, retinal nerve fiber layer (RNFL) thickness and optic disc parameters of myopic and hyperopic eyes in comparison with emmetropic control eyes and to investigate their variation acco
A novel phase-shifted long-period fiber grating (PS-LPFG) for the simultaneous measurement of torsion and temperature is described and experimentally demonstrated. The PS-LPFG is fabricated by inserting a pre-twisted structure into the long-period fiber g
为了实现对油漆物证的快速、无损以及准确分类,实验收集了犯罪现场常见的5个油漆品牌共计50个油漆样本的红外原始光谱数据和导数光谱数据,结合光谱融合技术,建立了基于KNN、SVM以及逐步判别分析的油漆分类模型。实验结果表明:3种分类模型对于融合光谱的识别率要高于单一光谱;KNN以及SVM分类模型对于其中的3种油漆样本识别率高,但对其余2种样本的分类效果并不好,而逐步判别分析模型对5种油漆样本的各种光谱数据识别率均高于KNN和SVM模型,其中采用逐步判别分析中的Smallest F ratio 判别模型对一阶导
We propose a novel model to explain the physical process of the thermally induced core laser leakage (TICLL) effect in a high power co-pumped ytterbium doped fiber (YDF) amplifier. This model considers the thermally induced mode bending loss decrease and