查询词典 reference frame

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。

A new sensorless speed control scheme for permanent magnet synchronous motor driver is presented. The nonlinear mathematical model of PMSM is established in α-β reference frame and linearized around the best estimator.

永磁同步电机无位置传感器调速系统具有控制方法简单，转矩脉动小，抗扰动能力强，调速性能好等特点，调速系统所要解决的问题是采用何种方法获取转速和转角。

It is particularly important to understand forces that act in a reference frame in circular motion .

特别重要的是，我们一定要搞清楚在作圆周运动的参照系中起作用的那些力。

Results also suggest that declarative knowledge is built in relations with object's experience, and was connected to form procedural knowledge in the process of finding ways. As for the transformation between procedural knowledge and configurational knowledge, objects can do it through mental process without maps, yet maps still provide a reference frame for it.

其中，叙述性知识的建立是与经验相关的，能在找寻路径的过程中获取，并加以联结形成程序性知识；程序性知识与结构性知识的转换，则可依个体的心智过程或藉由地图的辅助提供架构。

Bring forward idea of conformal transformation of wavelet analysis, put up reference frame of t...

提出小波变换的保角特征概念，为小波在VLBI观测技术中的应用提供理论依据和研究方向。

Bring forward idea of conformal transformation of wavelet analysis, put up reference frame of theory and researching way.

提出小波变换的保角特征概念，为小波在VLBI观测技术中的应用提供理论依据和研究方向。

Key words: theorem of kinetic energy; conservation law of mechanical energy; reference frame

动能定理，机械能守恒定律应用

It has the architectural features of distinctiveness, steadiness and continuousness, and is regarded as a reference frame carrying on the traditional Chinese culture.

该建筑形态早期呈现中西合璧式风格，并逐渐导致中国传统建筑艺术的复兴，具有建筑学上的特异性、稳定性和连续性特征，被视为弘扬中国传统文化的表象参照物。

In this paper, non-inertial reference frame, the study of Coriolis force on the impact of the spacecraft.

本文在非惯性系下，研究科里奥利力对飞船的影响。

Built up dimensional reference frame and vector equation of movement model of orthogonal turn-miling.

为了提高数控车铣的编程效率，论述了正交车铣运动的特征，同时通过对正交车铣运动过程的分析，建立了一个描述其运动的空间坐标系，从而建立了正交车铣运动模型的矢量方程。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。