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For a system, Hamiltonian is invariant under any translation of spatial coordinates.

对于一体系，哈密算符在任何空间坐标变换下是不变的。

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。

Its measurement is the measurement of time, the status of the translucent screen Department or looking at the version will mesh ruler in wire mesh network, and then set the gauge wire edge network, so that the vertical line on the screen ruler and MEST warp or weft parallel, at which point due to the mesh screen coordinates and produces overlapping on vertical ruler that formed over the mesh inferion-edged chevrons patterns within the meaning of the transverse diagonal mesh feet on the scale of numbers, that is, the measured screen mesh size.

其丈量办法是：丈量时，首先使丝网处在透亮的状况下或不收在看版台下，不兵网纲尺不收在丝网上，然后不兵网纲尺在丝网上匆匆安放，使网纲尺上的竖线与丝网的不经线或经线交错，这时由于丝网经经线和网纲尺上竖线爆发重叠成果，在网纲尺上变成棱形斑纹，斑纹的横向对角所指的网纲尺上对应的刻度数字，即是所测丝网的纲数。

The reformed Liuqin, playing the treble clef in a musical band, coordinates well with plucked instruments, string instruments and wind instruments respectively, resulting in unexpected sound effects.

改革后的柳琴用于乐队中，在乐队中充当高音声部，可分别与弹拨乐器、拉弦乐器、吹管乐器相结合，都可取得出人意料的音响效果。

This example involves the coefficient of trigonometric function transform and its polar coordinates drawings, as well as the interface and control color modify.

这个例子涉及三角函数的系数变换及其极坐标系绘图，以及界面和控件的颜色修改。

The SWF file format stores all x-y coordinates as integers, usually in a unit of measurement called a twip.

swf文件格式用整数来存储X-Y坐标，它的单位默认的是缇，20 twip=1 pixel。

All points were given by means of integer coordinates in a two-dimensional space.

所有的地点都以坐标点的形式标记在一个二维空间中。

In the laser typesetter, the coordinates of the imaging laser points are determined by synchronous movement of row and column scanning motors.

在激光照排机中，成像激光光点的坐标是由水平方向的行扫描和垂直方向的场扫描的同步运动决定的。

Structural reliability usually is analyzed in Descartes coordinates in which the correlated random variables should be converted to uncorrelated random variables by an orthogonal transformation method.

针对正交空间内，对相关随机变量的可靠指标求解时，需要做正交变换的缺点，研究了广义随机空间内结构可靠指标的计算方法，首次提出了广义随机空间内结构可靠指标计算的随机有限元法。

Height above sea level ; Geographical coordinates index ; Forest area and unforested area ; Precipitation

海拔高；地理座标指数；林区与非林区；降水量

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。