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The former uses Eigen-associative Learning algorithm to learn various facial expressions according to a face image with neutral expression. The latter is a two-level fusion approach which combines local linear and global nonlinear subspace learning. Amongst, the local linear subspace learning adopts eigen-representation technique for video sample compression in temporal domain; the global nonlinear subspace learning synthesizes optimized facial expressions in spatial domain.

前者采用特征关联学习算法根据一幅中性表情人脸图像合成具有其它表情的人脸图像；后者是一种结合局部线性和全局非线性子空间分析的两层融合方法，其中局部线性子空间学习采用特征表示技术在时间域对视频样本进行压缩、全局非线性子空间学习在空间域内产生优化的人脸表情。

Then linear control technique is applied to the linear subsystem of the transformed equivalent systems to design the controller, thus a nonlinear controller of the original chaotic systems is obtained, which is proved to be exponentially stable.

然后利用线性控制方法对变换后的等价系统中的线性子系统进行了控制器设计，由此设计出原混沌系统的非线性控制器，并证明其具有指数稳定性。

Furthermore, according to output data, the transfer function of linear dynamic subsystem is identified by the linear regression method. The sensor nonlinear dynamic models in the block format are established.

再根据输出数据，运用线性自回归方法得到动态线性环节的传递函数，这样就建立起块联形式的动态非线性模型。

Since the conditional Lyapunov exponents of its linear subsystem are all negative, the linear subsystem is synchronizable and the new chaos generator can be used for chaotic communication.

由于它的线性子系统的条件李雅普诺夫指数均为负，因而是可同步子系统，能够用于混沌保密通信。

A linear subsystem of speed and a linear sub-system of tension can be obtained by combining the inverse neural network with the two-motor variable frequency speed-regulating system.

然后分别对速度和张力子系统设计线性闭环控制器从而实现对两变频调速电机系统的高性能控制。

By using methods of passivity and switching control of states of the linear subsystem, both stabilization of the linear subsystem and invariance of the specified region in state space can be guaranteed simultaneously. Hence, a sufficient condition for the robust invariance switching control of this class of systems was derived.

通过基于鲁棒严格无源技术和线性子系统状态反馈的切换控制来镇定线性子系统，同时保证了指定区域的正不变性，从而得到了该类系统鲁棒不变切换控制的充分条件。

On the base of the reversibility analysis of the PMSM's mathematical model, the PMSM system is decoupled into a second-order linear speed subsystem and a first-order linear stator current subsystem.

通过对永磁同步电机的数学模型可逆性分析，将永磁同步电机系统解耦成二阶线性转速与一阶线性定子电流两个低阶的线性子系统。

The model includes the mathematics model of the linear system and mathematics model of the non- linear system.

模型包括线性系统的数学模型及非线性系统的数学模型。

And linear and non-linear system were simulated, the result shows that the algorithm has better effect of forecast control

并对线性系统和非线性系统进行仿真，其结果表明该算法具有较好的预测控制效果。

We consider two different systems, one is stable linear system, the other is stabilized linear system.

并通过详细真实的数值实验结果分析了每一种算法的优缺点。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。