Through analyzing reabsorption loss of current quasi-three-level systems and contrasting the experimental result,the threshold power as well as the inversed thermal particles were obtained,and the steady-state behavior of the improved ring cavity double-clad Tm3+-doped fiber laser was investigated.
通过分析准三能级系统的再吸收损耗并对比实验结果,获得了双包层掺Tm3+光纤激光器的阈值功率和热平衡时反转粒子的数量;研究了所设计的环形腔双包层Tm3+光纤激光器的稳态特性,仿真结果表明:环形腔结构下,整个光纤都处于高泵浦状态之中,且随入射功率的增加,泵浦功率增加更明显;在光纤长度不变的情况下,二色镜最佳反射率随泵浦功率的增加逐渐增大;在二色镜反射率不变的情况下,随泵浦功率的增加,最佳光纤长度逐渐增加。
Theoretical analysis of the noise characteristics (ASE) was conducted,the analytical formula of gas gain,threshold power and slope efficiency was prescribed and a numerical model with output characteristic was developed.
抽运光模强度分布与纤芯铒离子分布的重叠积分因子是对激光器非常重要的参数,将对光纤的模式进行分析,根据各个模式的模场来判断该模式是否与纤芯铒离子分布有重叠,研究了与介质吸收截面有关的重叠积分的影响因素;对放大自发辐射(ASE)噪声特性进行理论分析,给出增益、阈值功率和斜率效率等的解析形式,建立输出特性计算模型。
This paper studies the influencing factors of power threshold of high energy laser in the thermal blooming in aspects of numeric and theoretical analyses,and gets the conclusion that the power threshold is proportional to the square of wave length and air flow rate,and is inversely proportional to the absorption coefficient.
从理论和数值分析两个方面研究了影响热晕效应中高能激光功率阈值的因素,得到了高能激光的功率阀值与激光束波长的平方成正比,与空气流动速度成正比,与吸收系数成反比的结论。
This paper firstly discusses the mechanism of production and the properties of power threshold about nonlinear effects .
在分析了光纤激光器、放大器中几种非线性效应的产生机理、功率阈值特点后,着重介绍了采用大模场光纤设计、变化光纤掺杂成分及分布、纳米粒子直接掺杂技术以及控制应力、温度场调制等新方法、新技术在非线性效应管理中的应用,最后指出合理的方案。
Masking Effects of Forward Masker Sound with Different Durations on Frequency Receptive-field and Minimum Threshold of Inferior Collicular Neurons of Mouse;
不同时程的前掩蔽声对小鼠下丘神经元强度—频率感受野和最小阈值的影响
Two-dimensional Extension of Minimum Error Threshold Segmentation Method for Gray-level Images
灰度图像最小误差阈值分割法的二维推广
Image thresholding segmentation based on two-dimensional minimum Tsallis-cross entropy
基于二维最小Tsallis交叉熵的图像阈值分割方法
Minimum query plan threshold for considering queries for parallel execution (cost estimate):
为允许查询并行执行须满足的最小查询计划阈值（成本估计）:
Application of Image Segmentation Based on Minimum Bias-Normal Distribution Index in Extracting Brain Structures from MRI
基于最小偏态阈值的分割法在MRI图像人类脑部实质提取的应用
Adaptive selection and simulation of optimal decomposition level in threshold de-noising algorithm based on wavelet transform
小波阈值降噪算法中最优分解层数的自适应确定及仿真
just perceptible difference limen
最小识别阈（可感觉的最小神经刺激）
Performance Analysis of Threshold Denoising Via Different Kinds of Mother Wavelets and Wavelet-Thresholding Denoising Method Based on Energy Cell;
小波阈值去噪的性能分析及基于能量元的小波阈值去噪方法研究
Study on the Economic Threshold and Ecological Threshold of Oedaleus Asiaticus Control on Typical Steppe in Inner Mongolia;
内蒙古典型草原亚洲小车蝗防治经济阈值和生态阈值研究
A De-noising Algorithm of Wavelet Threshold Based on a New Wavelet Thresholding Function;
基于一种新阈值函数的小波阈值去噪方法的研究
Study on the losses of wheat yield and the ELT to wheat root rot
小麦根腐病产量损失及经济阈值研究
The new thresholding function based on wavelet de-noising method
基于新阈值函数的小波去噪方法研究
Study on Threshold De-noising Technology for Speech Signal Based on Wavelet Packet
基于小波包的阈值语音去噪算法研究
An improved threshold de-noising algorithm based on wavelet correlations
基于小波相关性的改进阈值去噪算法
MRI Medical Image Denoising Based on BEMD and Wavelet Thresholding
基于BEMD和小波阈值的MRI医学图像去噪
A New Method of Reducing Speckle Noises of SAR Images Based on the Wavelet Threshold Analysis
一种基于小波阈值的SAR图像降噪方法
Application of Wavelet Shrinkage to Laplace Equation
小波阈值方法在Laplace方程中的应用(英文)
SAR Image Denoising Based on Adaptive Wavelet Thresholding
基于自适应小波阈值的SAR图像降噪