reference projection

A real-time current detection based on FBD ( Fryze-Buchholz-Dpenbrock) method is pre-sented to detect the harmonic, negative-sequent and zero-sequent currents in three-phase four-wire system, and the essential of the method is the projection transformation of reference voltage.

为了快速、有效地检测出三相四线制电力系统中的谐波、负序和零序电流，提出了一种基于FBD法的电流实时检测方法。

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Paper analyzes the the attitude update algorithms of local level frame, and studies the projection error of angular rate of navigation reference frame relative to inertial frame under the large angular motion dynamic environment.

论文分析了当地水平地理坐标系下的姿态更新算法，研究了大角运动动态环境下，导航参考坐标系相对惯性系转动角速度在载体坐标系下的投影误差影响。

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The emphasis of field experiment and study is put on the determination of projection reference plane and image control point as well as quick mapping technique.

野外试验和研究的侧重点是确定投影基准面，像控点及野外快速编录技术。

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Thompson's projection used a day-by-day count to cross-reference the Mayan to the European calendar rather than a count of years.

汤普森的设想是作用逐天计算去勾划&涉及了玛雅到欧洲的历法，而不是年的计算。

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