Narrates the conventional method of SVPWM algorithm, by which the little zone of the reference space voltage vector is decided, and studies a new simple method.

概述了传统空间矢量pwm算法中判断参考空间电压矢量所在扇区和小区域的方法，研究了一种新的简单的判断算法。

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Remanent magnetism of soil layer is taken as a reference frame for locating hydrocarbon seepage zone.

本文利用土壤剩余磁性作为确定烃类渗漏带的参考系。

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The reference heights of casing shoes are proposed with the evolution process of damage zone.

根据流变过程中围岩损伤区的演化过程，给出了套管鞋高度的参考值。

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The federal agency began its probe -- which it dubbed "Operation Red Zone" in reference to the area between the 20-yard line and goal line for a football team's offense -- on September 1, 2012, and wrapped it up on February 6.

CNN: SHARE THIS

Under the cease-fire, about 1, 500 Russian peacekeepers are allowed to remain inside, and can do patrols about 6 kilometers outside, the "zone of conflict, " a reference to South Ossetia and Abkhazia.

CNN: Georgia signs cease-fire agreement

In Switzerland, which like the U.K. isn't part of the euro zone, the central bank has used the euro as its external reference point in its efforts to keep the Swiss franc's value stable.

WSJ: Banks Prep for Life After Euro