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Also, this dissertation established a sufficient condition for ILC convergence of a class of uncertain nonlinear time varying systems with a discussion on the convergence speed. Furthermore, for a class of linear systems, frequency-domain convergence analysis has been provided for a closed-loop type ILC algorithm with a convergence speed comparison with the conventional Arimoto-type open-loop ILC algorithm.

同时还给出了存在不确定及干扰非线性时变系统迭代学习控制收敛的充分条件，并对闭环迭代学习控制收敛条件和收敛速度进行了频域分析和讨论。

The Linear Fractional Transformation representation of the uncertain aeroelastic system is formulated to perform model validation and robust flutter analysis.

分别使用基于Carathe-dory- Fejer插值定理和Nevanlinna-Pick插值定理的模型集检验方法进行了模型确认，在时间域和频率域中对模型集的有效性进行了验证，确定了不确定性的幅值。

The linear fractional transformation representation of an uncertain aeroelastic system is formulated to perform model validation and robust flutter analysis.

建立不确定气动弹性系统的线性分式变换模型，给出了频域的模型有效性检验方法，对有效模型集进行参数化并将不确定性幅值最小的模型集求解归结为优化问题。

By means of the nonlinear state feedback and coordinates transformation,many uncertain nonlinear systems can be transformed as a linear fractional transformation on the generalized plant and the uncertainty.

非线性系统线性化后，线性系统的鲁棒控制方法就可用于控制器的设计[1 - 3] 。80年代以来，鲁棒控制理论得到了迅速发展，H∞方法和μ方法成为鲁棒控制设计的有效工具，并广泛应用于线性系统控制中 [4- 8] 。

Using the linear fractional transformation for the system model, the controller was designed based on H2/H∞ control by the method of linear matrix inequalities for the uncertain parameter and external disturbance in hydraulic servos.

针对液压伺服系统中参数时变和外界干扰的特点，通过运用线性分式变换得出系统的传递函数，运用线性矩阵不等式处理方法，设计出基于H_2/H_∞控制的控制器。

The problem of D-stable robust covariance control for the delta operator formulated linear uncertain systems based on dynamic output feedback is studied.

研究Delta算子描述的线性不确定系统基于动态输出反馈的D-稳定鲁棒协方差控制问题。

In Chapter 3, we consider the uncertain multiobjective linear optimization problem.

第三章考虑了不确定信息的多目标线性优化问题。

When the output control is considered, it is assumed that the nonlinear term satisfies the Lipschitz condition with an uncertain Lipschitz constant.

在采用输出反馈控制时，假设非线性项满足李普希兹条件，但李普希兹常数未知。

The effects of any one of uncertain structural parameters or load on the displacement and stress are examined by some interval models.

通过构造几种区间模型考察了任一结构参数和荷载的不确定性对应力的影响。

This method can be used to identify the log curve shape and remove some uncertain factors from log data. In this paper, the identification of the actual curve is basically accurate by using the method.

此方法可以对测井曲线形态进行识别，且消除了测井曲线中的不确定因素，运用该方法对实际测井曲线形态的识别基本正确。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。