查询词典 speckle

Wavelet transform is introduced into the study of scene matching. The first application is to reduce speckle noise in SAR images and the other one is using wavelet_based multiresolution analysis in hierarchical matching. A new nonlinear wavelet transform-morphologic Harr wavelet transform, which suit for hardware realization is presented for matching application.

3将小波变换引入到景象匹配研究之中，研究了两个方面的问题：一是SAR雷达图象的斑点噪声的抑制问题，二是将多分辨分析的思想引入到分层匹配之中，并提出了一种适合于硬件实现的非线性小波—形态学Harr小波变换。

It can directly reduce the speckle noise of IVUS image, and do not need the homomorphic pre-processing.

6根据IVUS仿体图像的统计特征，提出了一种对序列图像内、外膜边缘提取的方法。

Lose weight, poor health, partly numb, cold hand and feet, hyperhidrosis, have a pain in the back, easy to get cold, herpes on the mouth, blocked or watery nose, dysphoria, insomnia or hypersomnia, hypodynamia, lose hair, speckle face and allergy.

体重减轻、体虚力单、局部麻木、手脚易冷、掌腋多汗、腰酸背痛；易患感冒、唇起疱疹、鼻塞流涕、烦躁不安、易患失眠或嗜睡；四肢乏力、指甲成像、脱发、面部褐斑及过敏体质

New nonlinear weighted average multidirectional morphological filtering algorithm is proposed, which is used in suppressing speckle noise.

提出了一种新的用于散斑噪声抑制的非线性加权均值多方向形态滤波算法。

In this paper, a new nonlinear weighted average multidirectional generalized morphological filtering algorithm is proposed to suppressing speckle noise.

本文提出了一种新的用于散斑噪声抑制的非线性加权均值多方向广义形态滤波算法。

Three main problems in NETE have been studied. They are: 1 reducing the speckle noise in ultrasound image; 2 noninvasive temperature estimation for HIFU; 3 noninvasive detection of lesion in tissue.

并重点研究了HIFU治疗效果实时评价中的三个关键问题，即：1超声图像中斑纹噪声的抑制；2HIFU辐射后焦域组织温度的无损测量；3组织损伤情况的无损监控方法。

The result of experiment indicates that digital speckle autocorrelation is capable of measuring the seriate displacement accurately.

研究结果表明，数字散斑相关技术可以高精度地测出连续移动物体的位移。

Our recent works of PDE-based image processing on electronic speckle pattern interferometry are reviewed,including performing contrast enhancement and denoising simultaneously for ESPI fringes,proposing new oriented PDE denoising models for dense ESPI fringes and a nearly preprocessing-free method for skeletonization of gray scale ESPI fringes.

回顾了近几年偏微分方程图像处理技术在电子散斑干涉条纹处理中的应用成果，包括应用偏微分方程图像处理方法同时实现电子散斑干涉条纹图和相位图的滤波和增强处理，提出用于密集电子散斑干涉条纹处理的方向偏微分方程模型及提取电子散斑干涉条纹骨架线的偏微分方程方法。

In this method residual stresses were evaluated using a fracture mechanics approach,that is,the crack opening displacements measured by digital speckle correlation method at a point on the edge of a plate as a rack was introduced and extend from the edge were used to deduce the state of stresses that existed in uncracked plate.

提出一种简便的残余应力检测方法，利用数字相关技术检测裂纹扩展过程中试样表面的变形，应用断裂力学理论计算出残余应力分布。通过梁弯曲对试验结果作了验证并与应变测量结果进行了对比，残余应力的检测结果与理论值标准差为1.28MPa。对淬火和焊接残余应力分别作了检测。实际应用表明所提出检测方法具有准确、高效和使用简便的特点

In last chapter, two kinds of portable DSPI vibrometer are developed. A new simple and reliable structure for speckle averaging is made up and a circuit to change the phase of wide-band signal (200Hz-100KHz) with keeping amplitude constant is skilfully designed.

巧妙地设计了在保持幅值不变的情况下，对宽带信号（200Hz-100KHz）进行连续和离散相移的电路，研制了一种新型简单可靠的散斑平均器，取得了较好的散斑平均效果。

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。