以下为句子列表：
英文: A feedforward or open loop method is used to estimate the parameters, and then more accurate feedback or closed loop method is used to complete synchronization.
中文: 首先利用前向估测方法对参数进行预估计，在此基础上结合后向反馈方法完成同步。
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英文: As a result, a high robust controller was easily accomplished, consisting inner-loop, the current loop, outer-loop, the position loop, pre-filter controller, feedforward controller, repetitive controller, and disturbance observer.
中文: 该控制器由内环的电流控制器和外环的位置控制器、前置滤波器、前馈控制器、重复控制器和扰动观测器组成。
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英文: By using a new optical input power level detection and signal treatment method to control the gain of the receiver and keep its output level within the required range, a novel feedforward AGC optical receiver without radio frequency feedback circuits is r
中文: 我们采用一种入射光功率电平检测与处理的新方法，对模拟光接收机的增益进行控制，将接收机输出电平控制在要求的范围内，实现了一种新型的无射频反馈电路的自动增益控制光接收机。
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英文: By using successive approximation approach, the feedforward and feedback optimal control law is presented, and a disturbance observer is designed to make the optimal controller physically realizable.
中文: 采用逐次逼近算法给出了系统前馈反馈最优控制律的设计方法，利用扰动观测器解决了最优控制律的物理可实现问题。
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英文: In the linearity of amplifier, the predistortion and the feedforward are the most popular techniques which possess different characteristics.
中文: 在功率放大器的线性化方法中，预失真和前债是最常用的手段。
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