相位积分

In the crossed plane polariscope, by rotating the polarizer and the analyser at constant rate in synchronism and recording images by a CCD camera continuously, four phase-shifted images whose intensity are integrated by sensors are obtained.

在正交偏振光场下，按一定速度同步旋转起偏镜和分析镜，CCD摄像机可连续获取四幅相移光弹图像，由CCD像敏单元积分获得其光强值，通过所提出的相移法运算，可以迅速地得出全场等倾角和等差线的相位值。

In this paper, some problems that have to be faced with in the application of SPLL to static synchronous compensator are analyzed, and two improvements of SPLL are proposed. The first one is removing the filtering function of lead-leg element into the prepositive delayed signal cancellation element to remedy the difficulty in deciding its parameters; the second one is directly taking the post-PI regulation output of q-axis voltage as error signal of phase to call off the forward integrating element.

分析了软锁相环应用于静止同步补偿器时面临的若干问题，并提出了2方面的改进方案：一是针对超前/滞后环节参数选取困难的问题，将其滤波功能转移到前置延时信号消除环节中；二是q轴电压经PI调节的输出直接作为相位的误差信号，减少了前向积分环节。

Its fluctuation property is qualitatively characterized by the power spectral density and integral spectral density,and it is concluded that the ratio of high frequency phase noise increases with the increase of pump power.

利用功率谱、积分谱对具体泵浦条件下的相位噪声特性进行定性分析，结果表明，泵浦功率越大，高频成分占的比例越大。

Based on the extended Huygens-Fresnel principle and the quadratic approximation of phase structure function, we have derived the analyticl expression of the spatial degree of coherence for partially coherent flattened beams propagating through the slant turbulent atmosphere with the help of tensor integral, then analyzed the effects of different zenith angle, propagation distance, coherence of source and outer scale of turbulence on the spatial degree of coherence on the receiver.

基于广义惠更斯-菲涅耳原理和相位结构函数的平方近似，运用张量积分的方法导出了部分相干平顶光束通过斜程湍流大气传输后接收面光束空间相干度的解析表达式，分析了不同天顶角、传输距离、光源相干性以及湍流外尺度对接收面光束空间相干度的影响。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷