平移

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

Based on the analysis of the affected extent of the neutral-point potential by every space vector on all kinds of voltage and current conditions the concept named neutral point control grade was proposed for the first time in this paper. The calculation formulas of NPCG were presented as well. Based on NPCG, a novel modulation scheme called optimized 3D space vector modulation (O3DSVM) scheme was proposed in a-b-0 coordinates based on the translation principle of axes, by which the space vectors with higher NPCG values are selected to synthesize the object vector to suppress the unbalance of the neutral-point potential.

该文通过对各种电流电压状态下每个三维空间矢量对直流中点电位的影响进行分析，提出了"中点控制度"(neutral-point control grades，NPCG)的概念，并给出了NPCG的计算公式；基于NPCG，在a-b-0坐标系下提出一种基于坐标平移原理的新型"三维矢量优化选择调制策略"(optimized 3D space vector modulation，O3DSVM)，该调制策略能优化选择NPCG值较高的矢量以合成目标矢量，从而达到最大程度控制直流中点电位偏移的目的。

However, proving axisymmetry for the Onsager model is still very difficult, at least for two reasons: The first is that we lack methods for proving axisymmetry, even though there are method for proving radial symmetry or translation invariance.

但是，证明了Onsager模型轴对称仍然是非常困难的，至少有两个原因：第一，我们缺乏证明轴对称的方法，即使是证明辐射对称或平移不变性的方法。

Key Words: decimal, symmetry, translation and rotation, multiplication

重点词汇：小数，对称、平移与旋转，乘法

Geometric transformations are translation, rotation, symmetry, shear, variable ratio.

几何变换有平移、旋转、对称、错切、变比。

In phase of junior high school, graphical motion basically is contract commutation, contain translation, axial symmetry, rotate and the center is symmetrical.

在初中阶段，图形的运动主要是合同变换，包含平移、轴对称、旋转和中心对称。

The translational energy distributions of the two product channels could be obtained.

进一步可获得两反应通道的产物平移动能分布。

A kind of trencher with vertical auger for cable trench digging is described in the article. Referring to the basic principle of auger drill, trenching operation is realized via horizontal moving. It is a dedicated equipment to excavate cable trenches in oil fields. It features small body, simple operation, high work efficiency and low manufacturing cost for trenching attachment.

介绍一种立式螺旋电缆挖沟机，利用螺旋打洞机的基本原理，通过平移完成挖沟作业，是油田电缆沟开挖的专用工程设备，具有体积小、操作方便、工作效率高和挖沟工作装置制造费用低廉等特点。

The experiments show that this algorithm is unacted on image zoom, can eliminate rotation, transition and stabilize the image sequence.

实验结果表明，本算法可以克服图像缩放影响，有效消除旋转和平移抖动，实现视频图像序列稳定。

In this case the epipole has the same coordinates in all images and is called the Focus-of-Expansion, and the vanishing line of the ground plane is termed the Horizon.

飞行器在着陆时近似作平移运动，在这种情况下，图像上的极点称作FOE(focus-of-expansion)，地平面的消失线被称作Horizon。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐