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A nonlinear adaptive speed controller based on adaptive backstepping approach for permanent magnet synchronous motors with nonlinear coupling and parameter uncertainties is presented. With the preposed controller, the parameter uncertainties are compensated and high performance speed controller for permanent magnet synchronous motors is shown to be globally asymptotically stable. The scheme is robust to the parameter uncertainties and load torque disturbance.

针对永磁同步电动机系统的非线性耦合特性以及参数的不确定性，采用自适应反步控制实现永磁同步电动机的非线性控制，在补偿参数不确定性影响，提高系统的抗干扰能力的同时，实现了永磁同步电动机的高性能全局渐近稳定速度跟踪控制。

Besides finding the relationship between QNM of scalar field in this space-time background and time, we also got the difference between Quasi-Normal modes in AdS space-time and in asymptotically flat space-time.

我们还把此研究推广到了2+1维的随时间演化的BTZ黑洞，除了得到在这一时空背景中标量场似正规模与时间的依赖关系，还找到了AdS时空和渐进平坦时空标量场似正规模性质的区别。

Based on an entangled pair of qubit, it allows asymptotically secure key distribution and quasi-secure direct communication. Its absolute security has been proved.

基于量子纠缠特性，乒乓协议允许绝对安全地进行明文直接通信和渐进地进行密钥安全分发，是一种绝对安全的即时通信协议。

Based on the traffic model of a single node and on the system stability criterion, it is shown that the PD controller can regulate the source rate on the basis of the knowledge of buffer occupancy of the destination node in such a manner that the congestion-controlled network is asymptotically stable without oscillation in terms of the buffer occupancy of the destination node.

在单个节点的交通流的模型基础上，运用控制理论中系统稳定性分析方法，讨论如何利用信终端节点缓冲占有量的比例加微分的反馈形式来调节信源节点的能控交通流的输入速率，从而使被控网络节点的缓冲占有量趋于稳定。

Finally, the adaptive control strategy of active balancing for a strictly positive and real rotor with actuator saturation is successfully extended to a flexible rotor with single collocated plane and actuator saturation and a flexible rotor with multiple collocated planes and actuator saturation. A series of numerical simulations show that the proposed adaptive control law can evidently reduce the original imbalance-induced vibration of these rotors and the actuator movement asymptotically approaches to its target value, the opposite of the original imbalance.

最后，把提出的自适应控制策略成功地推广到带作动器饱和、单并置平面的柔性转子和带作动器饱和、多并置平面的柔性转子，一系列数值模拟显示：该控制律能显著减小这些转子原始不平衡引起的振动，作动器的移动能渐近收敛到与原始不平衡相反的目标值。

By choosing proper coupling parameters,the state of the slave system at time t is asymptotically synchronized with the master at time t-τ.Both theoretical analysis and simulation result show the effectiveness of this method.

通过选择适当的耦合参数，使得响应系统在t时刻的状态渐近地趋向于驱动系统在t-τ时刻的状态，理论分析和数值仿真结果都表明了该方法的有效性。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。