光栅数据的层通常称为段，而术语层仍然用于光栅和矢量数据。
Layers of raster data are more often called bands, although the term layer still applies to raster as well as vector data.
对于第一阶段运用矢量分析和激波理论关系，建立了适用于高速撞击条件的非线性激波模型。
Vector analysis and shock wave theory are applied to the initial phase during which the contact periphery expands more quickly than the compression wave fronts in the droplet.
介绍了一种极低速段永磁同步电机无速度传感器矢量控制方法。
A sensorless vector control method for permanent magnet synchronous motor (PMSM) drive at very low speed was presented.
次流压比的增加将导致激波向扩张段上游移动，且喷管矢量角不断增加；
Along with the increase of the secondary flow pressure ratio, the shock move toward upstream divergent section and the thrust vector angle gradually increases;
矢量声场时声波场的重要组成部分，但在相当长的一段时间内没有受到重视，声波的矢量信息却被忽略了。
Vector acoustic field is a very important part of sound wave, but the vector information of acoustic wave has been unwitnessed for a long time.
本文通过分析遥感分类图栅格像元之间的关系，快速自动地提取矢量数据点及其连接信息，进而利用连接信息快速生成弧段，由弧段自动组建多边形并建立完整的拓扑关系。
In this paper, we analyzed the relations between pixel and pixel in the classified raster map. Based on the relations, all vector points and the connection information between them can be extracted.
详细阐述了七段式空间矢量脉宽调制实现方法，并搭建了整个系统的仿真模型，得到转矩、转速、定子电流的仿真波形。
The implementation of 7-segment SVPWM algorithm was detailed description and the simulation of the system was built, rotational, speed, the stator current simulation waveforms were got.
详细阐述了七段式空间矢量脉宽调制实现方法，并搭建了整个系统的仿真模型，得到转矩、转速、定子电流的仿真波形。
The implementation of 7-segment SVPWM algorithm was detailed description and the simulation of the system was built, rotational, speed, the stator current simulation waveforms were got.
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