作用积分

On the basis of general double closed-loops PID position tracking design of theodilite, the step-by-step integral separate PID control method is introduced, the calculation shows that it can effectively restrain overshoot, track position smoothly, and is helpful to reaction wheel control.

在通常的经纬仪双闭环PID位置跟踪设计基础上，在位置环引入步进式积分分离PID控制策略，计算表明，其可以有效抑制超调，较为平缓的实现位置跟踪，利于反作用轮的角动量平衡作用。

In this thesis, the influence of waterline integral term on the calculation results of zero-order and 1〓-order free wave amplitude function and wave-making resistance have been analyzed in detail.

本文还较详细地分析了水线积分项对0阶和1阶自由波幅函数及兴波阻力计算结果的影响，证实了水线积分项的重要作用。

In this thesis, the influence of waterline integral term on the calculation results of zero-order and lst-order free wave amplitude function and wave-making resistance have been analyzed in detail. And the role of waterline integral is proved to be important.

本文还较详细地分析了水线积分项对0阶和1阶自由波幅函数及兴波阻力计算结果的影响，证实了水线积分项的重要作用。

To solve the above problems, a novel resonance injection type hybrid active power filter is presented, it allows the energy exchange between the DC-side capacitor and grid, DC-side voltage will be stabilized after the proposed control method base on the regulation of reactive current is adapted. On the other hand, a new current control method is proposed which is based on the control of error between injection current and harmonic current compensated by passive power filter using recursive PI.

在此基础上结合提出的基于基波无功电流闭环调节的直流侧电压控制方法，保证了直流侧电压的稳定；提出了采用递推积分将无源滤波器作用后电网谐波电流与注入支路补偿电流进行闭环比较控制以获得参考电流的方法，减小了误差，提高了系统的控制精度。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。