查询词典 unitary invariant

The db4 wavelet was applied in signal de-noising and the translation invariant wavelet was used to eliminate the Gibbs phenomenon .

对电力系统接地短路电流信号的去噪进行了研究，针对小波去噪等信号处理方法中存在的 Gibbs现象，提出并研究了采用db4小波进行信号去噪，采用平移不变小波变换，并以新型阈值代替传统阈值，进一步改善了去噪效果。

As translation, scale and rotation invariant features, the Orthogonal Fourier-Mellin Moments are robust and have good ability of image classification and reconstruction. They have been widely used in scenery analysis, target recognition and image classification.

正交傅里叶-梅林矩由于具有平移、尺度、旋转不变性，以及较强的鲁棒性和图像分类和重建能力，在景物分析、目标识别和图像分类中得到了广泛的应用。

SDE is also rotation, translation and scale invariant. Integrated with the human vision and the characters of entropy, improvements are made on the new partition method and the weight function.

结合人类的视觉特征及熵的特性，进一步提出利用加权空间分布熵来优化和改进颜色空间分布特征的提取算法。

Translation invariant discrete wavelet transform ; Doppler ultrasound ; blood signal ; clutter rejection ; spectrum estimation

平移不变离散小波变换；超声多普勒；血流信号；杂波抑制；频谱估计

The experiments have been done in a database consisting of 3000 binary trademark images, the results show that this shape feature can depict the image well, and it has very excellent invariant performance under translation, scale and rotation.

总的来说，形状表示法可以分为两类：基于边界的方法，如 Fourier描述子[1] 和变形模板匹配 [2 ] ；基于区域的方法，如 Hu不变矩 [3 ] 。

Preserve all the Invariant Sections of the Document, unaltered in their text and in their titles.

L保持不变的所有部门的文件，改变他们的文字，并在其冠军头衔。

In this algorithm, the strongest corner points is adaptively detected with Harris operator and (2n+1)×(2n+1) feature windows is selected for originally mutual gray correlative matching. Continental distance ratio invariant criterion is proposed, and consistency of motion vector is improved by eliminating error matching points with median filter. 9 pairs right points is preserved, 4 pairs composing 1 group, and 5 groups is random distributed to uncoil the motion vector equations. Last, stabilization precision is improved by averaging the 5 groups' solutions.

该方法用Harris算子自适应检测出最强壮的角点，开辟(2n+1)×(2n+1)特征窗进行灰度互相关初匹配；提出欧式距离之比不变准则，通过中值滤波剔除误匹配点，确保运动矢量较高的一致性；最后保留若干正确的匹配点对，分成多组解运动矢量方程，将多组解的平均值作为全局运动矢量以提高稳像精度。

Continental distance ratio invariant criterion is proposed,and consistency of motion vector is improved by eliminating error matching points with median filter.9 pairs right points is preserved,4 pairs composing 1 group,and 5 groups is random distributed to uncoil the motion vector equations.Last,stabilization precision is improved by averaging the 5 groups′ solutions.

该方法用Harris算子自适应检测出最强壮的角点，开辟(2n+1)×(2n+1)特征窗进行灰度互相关初匹配；提出欧式距离之比不变准则，通过中值滤波剔除误匹配点，确保运动矢量较高的一致性；最后保留若干正确的匹配点对，分成多组解运动矢量方程，将多组解的平均值作为全局运动矢量以提高稳像精度。

This paper firstly discusses the principle of UWB pulse array beamforming. Then a beamforming scheme is presented based on multi-rate filter bank, which is suitable for UWB pulse signals. The proposed method avoids the hardness of delays control in time domain, and can obtain the uniform frequency invariant array response in such a wideband for UWB signals.

该文提出一种适合UWB脉冲信号的基于多速率滤波器组的波束形成方法，避开了时域处理中延迟控制的问题，同时实现了大带宽范围内的均匀一致的频率不变阵列响应。

This project is to study mainly some problems in the harmonic analysis on the unit sphere with reflection-invariant measures, and others associated with reflcetion-symmetry.

本项目主要研究了球面上带有反射不变测度的调和分析问题和其它与反射对称有关的问题。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。