相位

The main purpose of this paper is to improvement of isochromatics wrapped phase map can make the phase to unwrap successfully and get the physical quantity we want to know. There is a peculiar problem of isochromatic interaction in Phase-shifting techniques of photoelasticity.

中文摘要本论文主要的目的是利用负载相移法来求得相位图，并且使用相位展开的技术使相位图展开完成，得到我们所要求得的物理量-相对延迟量。

The objective of this research was control a long stroke inchworm type positioning stage. Consider the factors that may affect positioning precision include the nonlinearity of piezoelectric actuator and phase lag cause by feedback control. Use model of hysteresis and zero phase error tracking controller to improve the tracking ability and reduce the phase lag of the system.

因此在本研究中，对於一个蚇蠖式长行程平台研究控制方法，考虑可能影响定位精度的因素，包括压电致动器的非线性特性与系统因为闭回路控制架构造成的响应相位落后现象，利用迟滞数学模型的建立与零相位误差追踪控制器的设计来改善系统的追踪能力与相位误差。

The estimate green time of the large phase are calculated first according to the queue length of green light direction.

在确定实际的大相位绿灯时间后，再通过遗传算法计算大相位中各个小相位的绿灯时间。

To the best of our knowledge, for the efficiency limit of DOEs, published papers either consider only one single factor or consider both phase only and phase quantization together. This is relatively insufficient for the real DOEs, because most of them are phase-only and spatially quantized.

由所知的文献显示，对於绕射元件的绕射效率上限，过去的论文只单独考虑某一因素，或只同时考虑纯相位及相位量化两个因素，或所提出的绕射效率上限过於保守，这对於实际的绕射元件而言，是相当不够的，因它们多数是纯相位且已空间量化的。

The efficiency limit of phase-only static DOEs are affected by three factors: phase only, phase quantization and spatial quantization.

一般所谓的绕射光学元件为纯相位绕射元件，其绕射效率上限受三个因素影响：纯相位、相位量化、空间量化。

Then, base on the equivalent circuit model for cascaded coupled resonator filter, the method for measuring or computing the phase of the reflection coefficient of short-circuit terminated networks and synthesizeing all the inter-resonator couplings and resonant frequencies of the filters to be tuned is studied intensively. The phase loading effect is removed and the tuning steps are analyzed. The method based on the partial fraction expansions of admittance matrix is used to synthesize coupling matrix of the filters under tuning.

然后，通过分析级联耦合滤波器的等效电路模型，着重研究了利用测量或计算终端短路网络的反射参数的相位来综合出待调级联耦合滤波器各个腔体的谐振频率和腔体间的耦合系数的方法，并且消除了端口相位加载的影响，给出了具体的调试步骤；接着利用导纳矩阵部分分式的展开来求得待调滤波器耦合矩阵，着重研究了消除端口相位加载的方法。

In phase calculate of phase-shifting interference technique,Because of the periodicity of function arctan,all the phase values are ranged over-π to π.

在移相干涉技术的相位计算中，周期函数arctan的相位值分布在之间，相位值分布的跃变形成了被压包后的波面。

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。

The raw data of I, Q channels are converted into the same amplitude and phase data in polar coordinates. The formula of optimal bit allocation for the amplitude and phase is deduced by the Lagrange multiplier based on the Rate-Distortion equality.

将I， Q两路原始数据转化为极坐标下相同大小的幅度－相位数据，根据率失真不等式由拉格朗日乘子法推导了基于幅度微分熵和相位微分熵的最优比特分配公式，然后用对应的比特数分别进行幅度和相位的网格编码量化。

A set of integrated compensation programs is designed based on phase errors above mentioned.A digital integral circuit with ADE 7759 is designed for com-pensating the led phase;a phase-shifted software algorithm realized in the merging unit DSP is introduced for compensating the time-delay.

针对这2种原因产生的相位误差设计出了一套完整的补偿方法，由于Rogowski线圈产生的相位超前，设计了一种采用ADE 7759芯片的数字积分电路，可基本还原线圈引起的超前相位；由于传输过程中产生的延时，介绍了一种移相用软件算法，可对延时进行有效补偿。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。