One-dimension water-oil displacement mathematics model considering threshold pressure gradient is established.

Determination of threshold pressure with IPR method

利用IPR方法确定启动压力

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Transient Pressure of Percolation Through One Dimension Porous Media with Threshold Pressure Gradient

低渗透介质含启动压力梯度一维瞬时压力分析

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Threshold pressure gradient selection in polymer flooding process

聚合物驱油过程中的阈压梯度选择

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According to the rate equation of quasi three level system, the threshold power, slope efficiency and optimum length of the crystals of longitudinally pumped Tm ∶ YAG lasers have been calculated and discussed. The influence of temperature on the Tm ∶ YAG lasers has been studied.

用准三能级系统速率方程对纵向泵浦TmYAG激光器的阈值、效率和激活介质最佳长度进行了计算和分析，讨论了温度对TmYAG激光器输出特性的影响。

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In the last part of this thesis, considering input threshold power distance of bistability switch point, input threshold power of bistability switch point, stabilization, switching time and so on, we design a erbium doped fiber ring resonator switch with double-directional coupler.

综合考虑开关阈值功率的间隔、开关阈值功率的大小、稳定性、开关转换时间等因素，选取适当的参数，设计了一个掺铒光纤环腔双稳开关。

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For the same diameter of beryllium cylinder, when the angel of incident laser beam was adjusted from 0 ° to 3 °, the back-reflection laser can be overcome. Threshold power density of HIP beryllium will increase.

对同一直径的铍环，激光入射角度从0°调整到3°后，由于消除了背反射激光在谐振腔内形成调Q脉冲，激光焊接时出现深熔焊的临界功率密度增加。

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The relationships among the threshold power, channel numbers, channel spacing and the cascaded EDFA numbers under the influence of fiber nonlinear-effects are obtained in condition with the equal spacing channel.

在信道间隔相等的条件下，得出了光纤非线性响应影响下的阈值功率、信道数、信道间隔和EDFA级联数等之间的关系。

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Using the latest parameter's data of Yb-Er co-doped Al2O3 films, the results show that Yb3+ co-doping can increase photoluminescence intensity and population inversion and lower the threshold power.

利用Yb-Er共掺Al2O3薄膜的相关数据进行模拟计算，结果显示Yb的掺杂可提高Er3+的荧光强度和反转粒子数，并使实现粒子数反转的阈值泵浦强度最大可降低一个数量级。

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It can be seen that the improvement of threshold power obtained in experiment agree with theoretical research very well, and equal-amplitude spectral lines can improve the SBS threshold power in fiber transmission system.

理论和实验符合的非常好，证明了等幅光梳可以提高光纤光传输系统中SBS的阈值功率。

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The four-energy-level velocity rate equation is illustrated and so is the expression of threshold power. The laser power on the condition of near-threshhold and powerful pumping is estimated.

由钕离子的四能级跃迁的速率方程理论，推出了阈值功率的表达式，并且对近阈值条件下和强泵浦条件下的激光输出功率做了理论预测；

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Expressions of output power, threshold power and the slope efficiency of the erbium-doped fiber laser are deduced. The output characteristics of the circular cavity erbium-doped fiber laser are simulated.

推导掺铒光纤激光器输出功率、阈值功率及斜率效率的表达式，对环形腔掺铒光纤激光器的输出特性及性能参数进行模拟仿真。

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Based on the rate-equation of quasi-three-level, the threshold power and the output power are deduced, and calculated the relationship between the optimal output transmittance and output power.

根据准三能级理论推导了阈值功率和输出功率，并且求解了最佳输出透过率和输出功率的关系。

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When the laser operates in a multi-wavelength condition above threshold power, there is no sign of polarization for the output laser, independent of the coiling radius.

高于阈值多波长运转时，无论采用何种缠绕半径，都观测不到偏振现象。

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A novel method, namely nonuniform dopant concentration fiber, is investigated, with that SBS threshold power of lightwave CATV systems can be increased.

本文研究了光CATV传输系统中提高受激布里渊阈值功率的一种方法&非均匀掺杂光纤法。

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The dependence of the deposition rate on the laser intesity power has been obtained, at a given temperature, the threshold power is 4 W.

获得沉积速率对激光功率P的依赖关系，在一定的温度条件下，阈值功率为4W。

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Among the nonlinear effects, stimulated Brillouin scattering ( SBS) is the most easily generated in optical fiber due to its low threshold power.

在非线性效应中，由于受激布里渊散射具有低阈值的特点，使得其在光纤中最容易产生。

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Anaerobic threshold power can reflect the aerobic metabolic capacity so well that this method can be applied to evaluate the training effect and to control the training course.

无氧阈功率能较好地反映速滑运动员的有氧代谢能力，可用于对训练效果的评定和对训练过程的监控；

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The Brillouin threshold power of the sensing fiber is analyzed and measured, fixing on the max-power of sensing signal.

分析并测试了传感光纤的布里渊阈值，标定Φ-OTDR系统传感信号的最大功率。

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Finally, we give numerical results of dependence of the growth rate and the threshold power on the beam velocity and the beam dencity.

最后，给出增长率和阈值功率随束速度及束密度变化的数值计算。

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Laser spectroscopy, the threshold power and different output characteristics with different injection currents are measured. And the influence factors of output characteristics are analyzed.

实验研究了LD抽运Tm：YAG脉冲激光器输出特性，测量激光的光谱、阈值功率和不同注入电流下的输出特性，分析了影响输出特性的因素。

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