矢量

According to the fundamental of vector control,a digital closed-loop control system of permanent magnet synchronous motor based on dsPIC30F6010 was designed and a model of permanent magnet synchronous motor in the estimation two phase rotating reference frame was introduced and an extended back electromotive force equation was deduced.

根据永磁同步电动机矢量控制的基本原理，设计了一种基于 dsPIC30F6010的无位置传感器永磁同步电动机控制系统，并介绍了在估算两相旋转坐标系下的PMSM模型，推导出了反电势方程的扩展形式。

When a rotating voltage vector is injected to the motor at standstill, there is a microinching when the voltage phase is line to the direct axis of the motor. Then the current will decrease due to the back electromotive force. The initial mover position is identified by this change.

电压相位和电机直轴重合时，产生的电磁推力超过负载阻力，电机有一微动，由于反电势的作用电流就会降低，通过检测电流矢量的变化来估计动子的初始位置。

The simulation results show that the vector control system based on this improved scheme has better dynamic and static performance. It solves a lot of problems such as larger error in the MRAS based on the back electromotive force when the motor runs across the zero speed and the instability based on the instantaneous reactive power in the regenerating mode and has high estimating precision.

仿真表明基于该方法的矢量控制系统动静态性能好，能有效解决反电动势模型参考自适应方法在速度过零点辨识误差大以及瞬时无功功率模型参考自适应方法在转速给定为负阶跃时转速不稳定问题，转速估计精度高。

The system mainly consists files and maps of basic graphics system, graphics elements (possess for processing point, the line, face, network graphic elements), the graphics operations (possess for blowing up graphics and dwindling graphics, movement, backdate and other operational functions), graphics import and export (possess for the mouse coordinate mapping,graphics data coordinate imported), conventions and the use of line-type, the son-graphics of filling the function module, to achieve the basic functions of the vector graphics.

本系统主要包括基本图形系统的文档和视图、图形元素（具备处理点、线、面、网络等图形元素）、图形操作（具备图形的放缩、移动、回溯等操作功能）、图形输入和输出（具备鼠标交互绘制、图形数据交互输入）、定制和使用线型、子图填充等功能模块，能够实现基本的矢量图形的所具有的功能。

This thesis proposed MIMO Vector Base Learning Network, which can be used to model and classify.

在此基础上更深入提出了矢量基学习网络，推导了网络基的自动生成规则。

The precision of motor parameter is the base of high-performance for sensorless vector control system.

摘 要：电动机参数的检测精度是提高无速度传感器矢量控制系统性能的基础。

Kinematic analysis by using base vector method for the swing linkage of X type train is presented in this paper.

用基底矢量法对X型列车的摆式机构进行了运动分析。

To obtain a sparseness of support vector for least squares support vector regression, an algorithm called vector base learning is proposed in this paper.

使最小二乘支持向量机的解具有稀疏性，本文提出一种稀疏解算法——矢量基学习。

The first-line task of GIS is expressing spatial data. Base on vector data model, a whole logical expressive structure of map is designed ,and spatial query and analysis can be builded on it.

地理信息系统的首要问题就是对数据的表示，基于矢量数据模型，本文设计和实现了完整的地图逻辑表达结构，为进行空间查询和分析建立了统一的基础。

A simulation model base vector control was built for the electric-wheel of the self-developed electical drive truck.

针对自行设计的交流电动轮驱动重型卡车电传动系统，建立基于矢量控制的传动系统仿真模型。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。