相位角

Within this framework we develop a theoretical approach to interpret photoelectron angular distributions in terms of a generalized phase Bessel function which can determine the principal features of the distribution and its variation with laser frequency and intensity.

文章作者及其合作者发展了光电子角分布的处理方法，利用复合相位Bessel函数来表征光电子的跃迁几率幅，将光电子的角分布与复合相位Bessel函数直接联系起来。

The characteristics and optical path difference of beam reflected by cube-corner prism with dihedral angle errors were researched;the CCP with errors acts as a phase screen comprised 6 optical wedges.

分析了角锥棱镜对光束的相位变换作用，带二面角误差的角锥棱镜可等效于6块光楔的组合，其楔角的大小和方向由二面角误差决定。

We expect it will benefit the industry field to break through the optical measuring limits at present by offering some new ideas. Optical measuring research based on moire interferometry has developed for several decades. The main idea of this research is to utilize the moire effect caused by two superimposed gratings of identical or similar spatial frequency. One is the reference grating and it is a virtual grating created by a computer program in this research; The other grating is the image of grating projected on the measured surface by the DLP projector, and this grating will distort because of the different sloped profile of the surface. To superimpose the program-created grating and the captured distorted grating will derive the so-called moire effect. This research combined the basic theory of optical interferometry and moire effect to project the different phases of the projected grating fringes by the phase-shifting method and compute the principal value of arguments between -π,π. In the end, the phase unwrapping program based on discrete Fourier transform of solving PDEs is used to unwrap the phase of the measured surface, and finally the surface profile is derived by the optical measuring system.

以叠纹干涉术为基础的光学检测研究之发展早已行之有年，而在本研究中所采用的投影叠纹法(Projection moiré)之主要精神在於藉由两道空间频率相近或相同的光栅相互叠加而成的效应，其中一道为参考光栅，而本研究中的参考光栅是以程式产生可调整不同空间频率的虚拟光栅；另一道则为投影至待测物表面的光栅影像，而在起伏高度不一的待测表面上的光栅影像会受到待测物表面起伏状况不同而在观测方向产生光栅投影条纹影像的歪曲变形，将电脑产生的参考光栅与由影像撷取装置所获取投影於待测物表面的光栅影像作叠合，便会产生所谓的叠纹效应；利用基本的光学干涉理论与叠纹效应结合，本研究中以相移法来改变投影於待测表面的光栅相位，再以相移法的理论反运算出在带有待测面各点高度资讯之介於-π，π相位主幅角，再以离散傅立叶转换解偏微分方程的相位重建程式还原待测面的相位值，以得知待测面之表面轮廓。

The principles of laser frequency transformation and the theory of phase matching in nonlinear optic crystals are also discussed. Based on this theory, angle of phase match is calculated.

在总结激光频率变换的原理和非线性光学晶体的相位匹配理论的基础上，可以根据相位匹配理论进行晶体的相位匹配角的计算。

Then, an optimization algorithm is used to optimize the initial projective transformation matrices by using area around each feature point, and complete the precise image mosaics.

方法的具体实现为：首先利用相位一致方法提取各图像中边缘上的角点特征，对特征角点进行初始匹配，然后利用初始匹配的角点计算变换矩阵的初始参数，再以光强度差的平方和为优化目标函数，在优化的过程中逐步获得变换矩阵的最佳参数，最后对重叠区域运用渐入渐出的方法实现了光强或颜色的自然过渡。

While the most dismally traditional astrologers referred to these angular relationships as "malefic" or "evil" due to the dynamic and challenging quality of the interaction between the 2 planets involved, the Hamburg School astrologers and the later Cosmobiologists and Uranian astrologers have continually verified that these are the most energetic angular relationships and therefore of greater significance for personal growth, and for prognosis of significant change and developmental periods.

90dial 盘的基本定理不是那么复杂， dial 是基于 4 倍相位的，把 360 度圆分成 4 个相等的部分 360 ÷ 4 = 90 ，根据占星家们几个世纪的经验，对应传统相位的合相 0 度，刑相（ 90 度和 270 度）和冲相 180 度的 4 倍相位，是行星间非常有力的关键相位，由于产生这这个相位的两颗行星互相改变与挑战对方，许多传统的占星学家会认为这个相位是有害的，甚至邪恶的，汉堡占星学家和稍微晚一些的宇宙生物学家经过长期的经验，认为 90 度相位是非常有力的基本角状角度，所以对个人成长非常有利，对日后的改变与发展非常有利。

The dependence of noncollinear angle and the corresponding grating periods on signal wavelength for satisfying quasi phase-matching and group velocity matching simultaneously of periodically poled RbTiOAsO4 in noncollinear quasi phase-matched have been carried out. The tuning characteristic of noncollinear interaction in group velocity matching situation has been analyzed.

研究了非共线准相位匹配过程中，周期极化 RbTiOAsO4晶体同时满足准相位匹配和群速匹配条件的非共线角和相应的极化周期随信号光波长的变化，同时分析了满足群速匹配条件时，非共线准相位匹配的调谐特性。

The above results showed that physiological AAI pacing maintained a normal EAS and VAS, and improved or enhanced VSS; while nonphysiological VVI pacing and physiological DDD pacing induced the decrease in VSS due to an abnormal EAS and VAS. Furthermore, with increasing the pacing rate, VSS was markedly decreased.The quantitative comparison of parameters of left ventricular systolic function obtained by computerized ERNA showed that AAI pacing induced the significant increases in ventricular ejection rate and stroke volume with concomitant shortening of ejection time.

应用计算机-ERNA相位分析技术，对13例生理性AAI、13例非生理性VVI及6例生理性DDD患者，分别进行等相位电影，相位图，相位直方图和VSS参数的静动态观察和定量比较，结果显示：AAI起搏可维持正常EAS和VAS，心室相位均匀一致，并且VSS参数-相角程，半高宽和峰相位标准差均较起搏前分别降低，提示起搏后VSS有所改善或增强。

The computational model andsimulation method are tested by post-process and visualization of experimentalresults. The application of 2-D Particle Image Velocimetry is also discussed.8 Optimal design of the furnace tube system in an ethylene-cracking furnace isstudied as a practical example. Screw-pitch of the static mixer unit andinstallation layout of tubes with static mixer is discussed.

讨论了先进的二维PIV实验方法应用的可能性。8、以一台典型的工业炉——乙烯裂解炉为例，对静态混合式炉管进行结构优化设计，优化参数涉及元件螺距、安装方式——如安装间距、安装个数、安装方向和相位角等，提出随着静态混合元件的螺距的增大，安装间距也在增大。

The commercial introduction of high accuracy, phase angle calibrators several years ago focused our attention on high accuracy, easy to implement, and where possible reasonably equipment insensitive, methods of phase measurement.

高精确度的商业化推出，相位角校准。几年前，我们的注意力集中在高准确，易于实施，并在可能的情况合理的设备相区分，方法测量。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。