计算并分析了离散角对有效二阶非线性系数和倍频效率的影响。
The influences of walk-off Angle on effective second-order nonlinear coefficient and SHG efficiency were also analyzed.
为改进网络学习效率及大范围收敛性，提出了网络权值学习的单调同伦方法，该方法具有与牛顿法相同的二阶收敛性。
To improve the learning efficiency and global convergence we present the monotone homotopy method, which has the same convergence as the Newton's method, to train the weights of the network.
苯基脲具有很强的二阶非线性光学效应，其粉末二次谐波产生效率为尿素的11倍；
A primary study was carried out and the results revealed that phenylurea had fairly strong nonlinearity, its powder second harmonic generation efficiency was 11 times larger than that of urea.
该模型通过对图像梯度的分析，在梯度变化剧烈区域和梯度变化微小区域利用二阶模型去噪以提高去噪效率；
Through analyzing the image gradient, this model used second order model to denoise at the region with obvious gradient change and the region with tiny gradient change.
该模型通过对图像梯度的分析，在梯度变化剧烈区域和梯度变化微小区域利用二阶模型去噪以提高去噪效率；
Through analyzing the image gradient, this model used second order model to denoise at the region with obvious gradient change and the region with tiny gradient change.
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