波前

The simulation and the experiment results demonstrated the precision of cross path integration techniques,Fourier transform integration and area wave-front reconstruction method.

通过计算机模拟和波面实际测量，对十字路径积分法、傅里叶变换积分法和区域波前重构法三种主要算法的重建精度进行了对比研究。

First, wavelet theory is used to reanalyze the Huygens-Fresnel principle, then an ideal of wave-front filtering is brought forward, the foundation of wavelet optics theory is thus established preliminarily.

首先用小波理论重新分析惠更斯-菲涅耳原理，并据此提出波前滤波思想，初步奠定了小波光学的理论基础。

An accurate measurement scheme is proposed for testing the error of cone prisms with Hartmann wavefront sensor. The measurement theory was discussed, the reconstruction of the wavefront reflected from a cone prism was studied, and the relation between the wavefront characteristics and the errors of a cone prism was given.

因此，提出一种用哈特曼波前传感器全面检测角锥棱镜角度误差和面形误差的技术方案，从理论上分析了哈特曼法的测量原理，深入研究了光经过角锥棱镜后的波面重建，给出了波面特征与角锥棱镜误差参量之间的关系。

After an arbitrary time, the new position of the wave front will be that of a surface tangent to these secondary wave lets.

介质中波动传播到的各点都可以看作发射子波的波源，而在其后的任意时刻，这些子波的包络就是新的波前，这就是惠更斯原理。

In this paper, a generalized squint mode 3D imaging geometry is considered to derive the phase history expression in wavenumber domain with consideration of the accurate differential range.

本文采用新的方法对波前弯曲误差进行了精确的推导，得到了波前弯曲误差在空间频域的二阶泰勒展开表达式。

As a result, it is difficult to measure the wavefronts of the laser beams by conventional wavefront sensors.

大功率激光二极管线阵特殊的发光区结构使它具有不理想的光学特性，特别是其快轴方向高达40°的大发散角，使得传统的波前探测器很难对其进行波前探测。

In order to solve this problem, a new method for the measurement of the wavefronts of high-power laser diode arrays with large dynamic ranges is presented.

针对这个问题，提供了一种可对大功率激光二极管线阵进行大动态范围波前测量的新方法，可在－π/2～π/2范围内进行高精度的波前斜率测量(±1′)。

The wavefronts are reconstructed by the results of the measured wavefront gradient, and the wavefront aberration is obviously shown.

应用模式法，通过孔径斜率进行了波前重构，结果表明热射流使波前产生较强的随机畸变。

This kind of digitalholographic wavefronts transforming method have found widespreadapplications in the fields of exact measurements, three dimensional imaging,microscopy, optical micromanipulation, atomic optics, quantum informationprocessing and so on.

本论文正是以此为出发点，重点研究了扭曲向列液晶空间光调制器(TN-LCSLM， Twisted Nematic LCSLM)的波前变换特性及其应用，为这一动态波前变换技术在光学微操纵、软物质自组织过程的控制等领域的应用提供了理论和实验基础。主要研究内容概括如下。

Ompare the experimental results with analytical results and sum up the factors which affect the flow front of underfill to find the method which can control the flow front, reduce the chance of short shot and air trap; therefore, enhance the reliable of underfill process of Flip-Chip.

AE(Computer-Aided-Engineering)模流分析模拟其流动情况；在完成实验与分析模拟之后，进行实验与模拟结果比较，归纳出影响底部充填波前形状的因素，并寻求控制底部充填流动波前形状的方法，降低短射与包风的发生，提高覆晶底部充填制程的可靠度。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。