论文部分内容阅读
Research progress of pressure detection and applications in liquid-assisted laser machining
【机 构】
：
SchoolofMechanicalandElectricalEngineering,GuangdongUniversityofTechnology,Guangdong510006,ChinaScho
【出 处】
：
光电工程
【发表日期】
：
2017年44期
其他文献
In this work, non-isothermal bleaching of Yb–Li co-doped fiber was investigated. The Yb–Li co-doped fiber was beneficial to reduce the photodarkening-induced excess loss and had no bad effect on the temperature of thermal bleaching (TB). Photodarkened fib
研究了温度对铝合金薄板中零群速度(ZGV)Lamb波频率的影响。建立了基于多普勒测振仪的全光学探测与脉冲激光激发不同温度的铝合金薄板中S1-ZGV模式的实验系统,得到铝合金薄板中S1-ZGV模式频率随温度的变化。随着温度从20 ℃升高到370 ℃,实验结果表明S1-ZGV模式频率减小了10.4%,理论计算结果表明S1-ZGV模式频率减小了10.9%,实验结果与理论结果比较吻合。进一步从理论上分析了铝合金薄板的厚度、泊松比和横波波速对S1-ZGV模式频率的影响,结果表明:当温度从20 ℃升高到370 ℃时,
A new high-performance laser scanning system is designed. In this system, a scanning arm consisting of a pentagonal prism and a scanning object lens is used to replace the traditional F \theta lens, and a circular imaging plate transmission mechanism is
基于三维荧光光谱法,以含有不同类型润滑油、机油、柴油、汽油的土壤样品为研究对象,分别提取不同土壤样品的三维荧光光谱,然后计算不同样品的荧光强度均值、标准差、重心横纵坐标、相关系数、长轴斜率、偏度和峰度等7个特征参数,并作为不同油类的识别特征。对7个特征参数进行主成分分析(PCA),前3个主成分累计贡献率为88.79%,但经聚类分析发现5w-40型润滑油和15w-40型润滑油的主成分混叠较强,无法准确实现分类。将经PCA得到的3个主成分作为反向传输人工神经网络的输入量,将石油烃有机物的种类作为输出量,以进行
描述了一个注入锁定的染料激光器,它是用脉冲氙离子激光器泵浦的若丹明6G四镜环形染料激光器,并且用氙离子激光输出线中的5960?作为注入光源、研究了注入锁定染料激光器的输出强度和光谱特性.
期刊
通过分析不同角度激光打靶条件下等离子体的辐射特性,发现在相同激光辐照功率密度下,激光垂直辐照等离子体产生铝的LPX强度要比激光斜入射辐照时明显增强,其中类氢离子跃迁线强度增长最为明显。实验结果还表明,激光斜入射辐照时LPX源沿靶面法线方向的尺寸变大,谐线变宽。
In this paper, the generation of dual-wavelength stable nanosecond pulses by a laser diode pumped Yb-doped double-clad fiber laser is presented. In the experiment, the fiber laser with two-mirror cavity is approved which operates in a self-Q-switching reg
Photoactivation of GLUT4 translocation promotes glucose uptake via PI3-K/Akt2 signaling in 3T3-L1 ad
Insulin resistance is a hallmark of the metabolic syndrome and type 2 diabetes. Dysfunction of PI-3K/Akt signaling was involved in insulin resistance. Glucose transporter 4 (GLUT4) is a key factor for glucose uptake in muscle and adipose tissues, which is
Based on the evaluation principle of the measuring uncertainty of the traditional coordinate measuring machine (CMM), the analysis and evaluation of the measuring uncertainty for optical micro-CMM have been made. Optical micro-CMM is an integrated measuri