简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
对没有固定基准的自由网，位移矢量是真实位移的有偏估值，有时精度最高的地方发现变形能力并非最强。
The displacement vector is biased estimated values, and sometimes, the area where the measuring accuracy is the highest could not have the best ability to detect the deformation.
通过对这些方案的分析，提出了固定合成矢量及其改进型的三电平直接转矩控制方法。
By analyzing those strategies, the fixed and improved synthesizing vectors for DTC control method fed by three-level inverters are proposed.
使用空间矢量调制固定开关频率和低转矩脉动。
Fixed switching frequency and low torque ripple are obtained using space vector modulation.
本文方案是基于转子磁链定向、通过固定开关频率、运用空间矢量调制(SVPWM)方法的矢量控制。
This scheme is based on the rotor flux, through the fixed switching frequency and using space vector modulation (SVPWM) method vector control.
该网络从输入语音信号的特征矢量序列中提取出一组固定数目的特征矢量，然后将这特征矢量馈入神经网络分类器进行识别。
It picks up the character vectors of a group of Numbers from the sequence of the character vectors of the input speech signals, and then put the vectors into the NN sorter to recognize.
使用计算流体力学软件FLUENT，模拟均匀来流绕固定圆柱的流动，模拟雷诺数为20,40,100时的绕流流动，得到流场的流函数等值线图和速度矢量图。
Uniform flow around a mounting cylinder is simulated with the application of FLUENT software while Reynolds number is 20, 40,100. Stream function and velocity vector distributions are indicated.
第一种控制策略使输入电流矢量与输入电压矢量保持固定偏置角。
The first one is based on keeping the input current vector in phase with the input voltage vector.
第一种控制策略使输入电流矢量与输入电压矢量保持固定偏置角。
The first one is based on keeping the input current vector in phase with the input voltage vector.
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