Author Affiliations
Abstract
1 Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
2 Department of Engineering Physics, Tsinghua University, Beijing 100084, China
3 Key Laboratory of Particle and Radiation Imaging, Ministry of Education, Tsinghua University, Beijing 100084, China
Coherent pulse stacking (CPS) is a new time-domain coherent addition technique that stacks several optical pulses into a single output pulse, enabling high pulse energy and high average power. A Z-domain model targeting the pulsed laser is assembled to describe the optical interference process. An algorithm, extracting the cavity phase and pulse phases from limited data, where only the pulse intensity is available, is developed to diagnose optical cavity resonators. We also implement the algorithm on the cascaded system of multiple optical cavities, achieving phase errors less than 1.0° (root mean square), which could ensure the stability of CPS.
070.2025 Discrete optical signal processing 120.5050 Phase measurement 140.4780 Optical resonators Chinese Optics Letters
2018, 16(4): 040701
第二炮兵工程大学 信息工程系，陕西 西安 710025
鉴于生物视觉特征对于图像的良好表征能力，提出了一种基于生物视觉特征的无参考型图像质量评价方法。对生物视觉ST模型进行了研究和分析，完成了对图像的稀疏化表示[利用最小二乘支持向量机回归方法训练生物视觉特征到图像质量的映射关系，获得能够预测图像质量的回归器[通过学习的回归器完成了对图像质量的评价。基于LIVE图像库的实验结果表明，该方法对于特定失真和交叉失真的预测误差分别为2%和5%左右，并且与目前技术条件下的质量评价方法相比具有很好的精确性和单调性。
无参考型图像质量评价 生物视觉模型 标准模型特征 最小二乘支持向量机 失真图像 nonreference image quality assessment[biological
