定向

The first control strategy has the disadvantages such as a large amount of computations, inherent pull-out torque, difficulties in realizing the adaptive control and so forth. For the rotor flux-oriented control, changing of load or the rotor speed will result in increased or decreased torque winding currents, which will change the magnetic field distribution in the air gap. Assumption that magnetic field is approximately equal to that generated by torque windings will affect the levitation performances.

分析表明：气隙磁场定向控制中存在最大转矩限制、非线性机械特性，难以实现自适应控制等问题；对转子磁场定向控制而言，当负载或转速变化时，由于转矩控制绕组转矩电流变化将导致气隙磁场发生改变，如果仍以转子磁场近似替代气隙磁场作为悬浮依据，必然影响到悬浮控制性能。

In this paper, the flux oriented angle of stator flux oriented vector control is deduced by the voltage vector space angle of the direct torque control, and mathematical model is set up based on the direct and quadrature axis component of the stator current.

将直接转矩控制与定子磁链定向矢量控制相结合，利用DTC中电压矢量的空间位置角，推导出SFOVC中的磁链定向角，然后根据旋转坐标系中的d轴和q轴电流分量，建立定子磁链估计的数学模型。

The composition and dynamias of analysis and appraise of maturalized plantation indictedthat PNT has improved the diversity and stability of the plantation,and the plantation has beenchanged into the mixed and uneven-aged naturalized stands.

对定向抚育与一般抚育及开拓林隙与未开拓林隙措施的研究表明：定向抚育提高乔木物种多样性和群落的稳定性，说明这两种措施推动和加速了人工林向混交、异龄、复层、优质天然化林分的转化。

Based on the analysis of the national and international development of aimed warhead and the conclusion of its developing direction, this paper establishes a model of missile meeting with target, then gives the analytic expression of optimum detonating delay time , and finally analyzes the result of imitation.

在对定向战斗部目前状况分析的基础上，建立了导弹拦截来袭目标的弹目交会模型，求解出了战斗部起爆的最佳起爆延时解析表达式，在此基础上对弹目交会过程进行了仿真，并给出仿真结果分析，对于定向战斗部的设计有一定的参考价值。

In the new models, there is no need to level and orientate theodolites for self--locating of GeoIMS. Comparing with the common model, the new models can eliminate the errors of levelling and orientating in self-locating of GeoIMS. So it is pos sible to improve greatly the precision of GeoIMS in the new models.

与传统模型相比，这几种新的自定位模型或者不要求仪器严格整平，或者不要求仪器进行相对定向，因此不再受仪器的整平、定向等误差的影响，从而使得系统的整体测量精度大幅度提高成为可能。

Orienteering introduced to China mainland only about 20 years. Orienteering is a new sports project for many people.

定向运动在中国的传播最早起源于台湾和香港，在内地的发展仅有二十多年的历史，对很多人来说，定向运动还是一项全新的体育运动项目。

The secrets of orienteering seemed to be too hard to solve at that time, and my legs seemed to go too fast for my skills.

当时，定向越野的秘密，对我而言，实在是难以解决，而且我的脚程似乎比我的定向技术还要快。

All with the objective of increasing the knowledge and awareness of orienteering all over the world, to gain interest for the sport and to attract new target groups.

所有的一切都是为了增加全世界对定向运动内涵的认识和了解，激发民众对体育的兴趣并吸引新的定向爱好群体。

At 3 o'clock: Jump to turn and be weighed directional, this use friend is more also, do not use so 301 other perhaps jump to turn or weigh directional technology.

第三点：跳转和重定向，这个使用的朋友也比较多，所以不要采用301或者其他跳转或者重定向技术。

The cat's-eye appears because there are many gas-liquid inclusions array in a certain direction.

其内部因含有大量的定向排列的气液包体，所以在定向切割的弧面宝石中会出现猫眼效应。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。