相移

We placed the lens holder, testing lens, and the assistant lens in the testing optical path. When the testing lens was mounted in the lens holder, we took five dynamic interferograms. After rotating the testing lens by 180 degrees along the edge of the testing lens, we took another set of interferograms. Then, we could evaluate the centering error of the testing optical element by analysing these two sets of interferograms.

在待测光程中加入透镜治具、待测透镜与辅助透镜，当待测透镜贴靠於透镜治具，此时撷取五张连续相移干涉图，之后由待测透镜配合透镜治具沿待测透镜外缘旋转180度，再撷取另一组干涉图形，最后由两组干涉图进行分析，以测量光学元件的偏心误差值。

In chapter 3, the principle of phase—shifting metrology and base of parameters decision are studied.

第三章讨论了相移干涉计量术的原理及一些参数选择依据。

It measures the surface profile not by measuring phase but by measuring the parameters, which is relative to the white-light phase-shifting interferometric intensity and monotonic function of the depth of the tested surface in the given measurement range.

依据白光相移干涉中与干涉光强有关的一些特定参量与表面形貌之间的一一对应关系，提出了一种不直接测量相位、避开相位测量不确定性的新方法。

On the basis of computer two-eye vision technology and heterodyne multiple frequency technology, 3D dense point cloud optical measurement software named by XJTUOM software had been developed,3D data of the object surface mought be acquired precisely by means of this way, According to the whole marked points come from XJTUDP,every pieces of point cloud mought be assembled automatically.

开发的XJTUOM三维光学密集点云测量系统软件，基于外差式多频相移技术和计算机双目立体视觉技术，可以精确采集物体表面的三维数据，利用XJTUDP产生的全局标志点，可以实现每幅点云的自动拼接。

In this paper, an improved sensorless control strategy, which is based on the detection of zero crosspoints of back-EMF, is proposed. In this method, only one feed back signal is needed to sense terminal voltages and no motor neutral line is required. The phase shifter errors in traditional methods are eliminated.

本文同时提出了一种改进的无位置传感器检测方法，这种方法基于反电势过零点检测的基本原理，采用单路位置反馈信号，无须引出电机中性线，硬件结构简单，消除了传统检测方法中由于深度滤波产生的相移和误差。

Accurate and efficient phase decoding algorithms play an important role in noncontact optical phase-measurement.

精确高效的相位解码在非接触光学测量中有着重要的作用，在总结传统算法的基础上，提出一种新的相移光解码算法。

In the chiral SU(3) quark model, we use the coupling between quarks and nonet scalar meson fields and nonet pseudo-scalar meson fields to describe the medium and long range interactions, and use one gluon exchange to describe the short range interaction. In the extended chiral SU(3) quark model, besides the nonet pseudo-scalar meson fields and the nonet scalar meson fields, the coupling between vector meson fields and quarks is also considered, the short range interaction can be dominately described by vector meson exchange. We investigate the nucleon-hyperon interaction in the extended chiral SU(3) quark model and study the S-wave phase shifts of N-Λ and N-Σ systems. Comparing to the results in chiral SU(3) quark model, we find that the short-range interaction could be described either by the one-gluon exchange or vector meson exchange.

在手征SU(3)夸克模型中，用夸克与标量介子九重态和赝标介子九重态场的耦合来描述中长程相互作用，单胶子交换来描述短程相互作用，推广的手征SU(3)夸克模型是在原来手征SU(3)夸克模型的基础上进一步引入了夸克和矢量介子九重态场的耦合，主要由矢量介子交换来描述短程相互作用，在推广手征SU(3)夸克模型下研究了核子－超子相互作用过程，计算了N-Λ和N-Σ相互作用的S波散射相移，通过和手征SU(3)夸克模型的结果比较，发现N-Λ和N-Σ系统的短程相互作用既可以由单胶子交换来描述，也可以由矢量介子交换来描述。

DB/decade will definitely oscillate since this represents 180 degrees of phase shift.

40分贝/十年一定的振荡，因为这代表了180度的相移。

An important feature of the device is that the phase shift is nearly constant with signal level.

该设备的一个重要特点是，相移几乎与信号水平不变。

In this paper a method for design of constant phase shift network, which can be used to improve the dynamical characteristics of feedback systems with variable open-loop gain, has been proposed.

本文讨论用于改善开环增益可能会有较大变化的反馈系统的动态特性的"等相移网络"的设计方法，并采用了优化的计算程序来求出极、零点的最佳位置，从而得到了一个在计算机上实现的最优设计法。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。