• 1. unit circle method: 单位圆法
• 2. Schelkunoff's unit circle method: 夏克诺夫单位圆法
• 3. circle unit method: 圆形基元法

• 1.The paper introduced setting principle, calculation and testing method for the low exciting limit unit using the static out of step characteristic circle.
  文中介绍了采用静态失步圆特性低励限制的整定原则、计算方法及调试方法。
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• 2.Finally, the improved algorithm and Schelkunoff's method have been combined to optimize roots which are not on the unit circle of linear array, then shaped-beam and zeros control are realized.
  最后结合谢昆诺夫单位圆法，利用该算法对直线阵列天线不在单位圆上的根进行优化，实现了方向图的波束赋形和零点控制。
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• 3.The method adopts the following steps: receiving a business circle joining request sent by a business unit, and joining the business unit into the selected business circle;
  所述方 法包括：接收商户发送的商圈加入请求，将所述商户加入所选择的商圈；
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