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After introducing SAW gyroscopic effect and acoustooptical Bragg diffraction effect briefly, a measuring tiny angle plan with CCD is put forward. Some core technology to measure tiny angle are discussed.

在扼要说明了Ω调制布拉格衍射角的物理原理后，初步设计了布拉格衍射角的CCD测量系统并讨论了影响其测角精度的若干关键技术。

PS colloidal thin films displayed bright iridescence due to Bragg diffraction.

在制备PS模板中，可以观察到明显的颜色，这是因为发生了Bragg衍射。

The elementary principle of the method is to get out acoustic information from acoustic solid medium firstly through Bragg diffraction ,and then to measure the difference of deflection angular from reference beam of light.

该方法的核心是通过声光布喇格作用，把SAW陀螺效应引起的声速变化信息寄载到布喇格衍射光中，通过检测布喇格衍射角度推算出固体介质的旋转角速度。

Theoretical analysis of and experiments on the fundamentals, efficiency, cross-modulation, inter-modulation and spectrum analysis of multiple-frequency acousto-optic Bragg diffraction are made and its application in laser high-speed printer illustrated.

本文对多频声光布喇格衍射的原理、效率、交叉调制、互调制、频谱分析等进行理论分析和实验研究，并阐明其在激光高速印字机中的应用。

The effect both of the initial ratio of the intensity and of the recording angles of writing waves on the anisotropic Bragg diffraction properties of volume gratings was discussed.

结果表明：记录光入射角和记录光初始光强比均对体光栅的各向异性衍射具有选择性；与此相比，记录光入射角和记录光初始光强比对于体光栅各向同性衍射不具备选择性。

The feasibility of the ACT for controlling the ODS withthe perturbation-corrupted control parameter is demonstrated with thecomputer simulation of controlling the Bragg diffraction acousto-optic system.

文中先以控制已知动力学表述的布拉格声光系统为例对自适应参考模型控制技术之可行性进行了计算机仿真示例证明。

AOTF operates on the extraordinary Bragg diffraction.

第二，本文详细介绍了声光可调滤波器的工作原理。

According to the principle of A-O interaction and quartz′s different characteristic in the direction of parallel and perpendicular acoustics field, with a quarter-wave plate being inserted in an AO Q-switch Nd∶YAG laser cavity between mirror and Q-switch, AO Q-switch′s Bragg diffraction efficiency formula is put out theoretically. Consequently, the conclusion has been drawn by calculating simulation that the ability of a single AO Q-switch′s switching CW Nd∶YAG laser is increased.

结合声光相互作用理论和声光介质熔石英在平行和垂直于声场的两个方向具有不同声光优值的特性，理论推导了腔内引入四分之一波片后声光Q开关的布喇格衍射效率公式，计算模拟得出引入四分之一波片能够有效地提高声光Q开关关断连续Nd∶YAG激光的能力。

According to the principle of A-O interaction and quartz＇s different characteristic in the direction of parallel and perpendicular acoustics field, with a quarter-wave plate being inserted in an AO Q-switch Nd : YAG laser cavity between mirror and Q-switch, AO Q-switch＇s Bragg diffraction efficiency formula is put out theoretically.

结合声光相互作用理论和声光介质熔石英在平行和垂直于声场的两个方向具有不同声光优值的特性，理论推导了腔内引入四分之一波片后声光Q开关的布喇格衍射效率公式，计算模拟得出引入四分之一波片能够有效地提高声光Q开关关断连续Nd：YAG激光的能力。

A quantitative analysis using computer simulation based on the modified Bragg's law and the optical multilayer theory was used to reproduce the diffraction rocking curves which fitted very well with the experimental ones, and a method to measure the structural parameters of Ge〓Si〓/Si superlattices was set up.

用光学多层膜理论对谱线作计算模拟的结果和实验非常一致，并在此基础上建立了一套同小角衍射测量Ge〓Si〓/Si超晶格结构参数的方法。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。