不确定性

The performance analysis and control of hybrid systems are difficult when the parameters perturb uncertainly. Therefore, it is necessary to propose the powerful approaches for robust performance analysis and control.

当系统参数存在不确定性时，系统的性能分析和控制变得非常困难，因此，给出混杂系统在参数不确定情况下的鲁棒性能分析和控制方法在理论和应用两方面都具有重要意义。

The system under consideration involves state time delay, nonlinear perturbation and parameter uncertainties.

系统包含状态时滞，非线性扰动和参数不确定性。

A kind of stability method is presented for a class of uncertain nonlinear system with perturbation and time delay.

针对一类有参数摄动和时延的非线性不确定性系统，提出了一种稳定性分析方法。

The simulation results show that the proposed approach can effectively eliminate the disruption of perturbation.

该方法能克服不确定性对混沌系统同步的破坏，实现了良好的同步效果。

This paper shall attempt to look at some aspects of controller synthesis for the multivariable servomechanism problem when the plant to be controlled is subject to uncertainty-in this case,a controller is to be found so that satisfactory regulation/tracking occurs in spite of the fact that the parameters of the plant may be allowed to vary,subject only to the condition that the resultant perturbed system remains stable.

例7 本篇将致力于探讨在待检对象受到不确定性的影响，而仅仅服从受扰动的系统最终保持稳定，这一条件之情况下的多变量随动系统中控制器综合的某些方面的问题。在这种场合，尽管受控对象的参数允许发生变化，而控制器必须具有令人满意的调节和跟随性能。

First, for state estimation problem of the linear stochastic systems with uncertainties in both the state matrix and the noise matrix, a new satisfactory estimator is constructed with stochastic theory, which can guarantee that estimator error system with bounded perturbed model parameter satisfies the constraint indexes that is given. Thus a sufficient condition of solving satisfactory estimation is obtained; secondly, the algorithm of designing satisfactory estimator is presented by analysis.

首先，根据满意控制思想，针对一类在状态矩阵及噪声矩阵中均含有不确定性的随机系统，设计一种满意估计器，使预测误差系统在模型的参数发生扰动时，依然满足预先给定的设计约束指标，得到了满意估计问题求解的充分条件；然后根据分析给出了满意估计器设计的算法。

A further historical uncertainty surrounds the tie between pietism and the intellectual movements arising in reaction to the Enlightenment.

进一步的历史不确定性，周围配合之间的虔诚主义与智力运动所引起的反应的启示。

Meanwhile, it has more proven this intelligent fault diagnosis method which has merged the advantages of ANN and ES can solve the equipment fault diagnosis problem that faults have pilosity nature, uncertainty and disguise such as the Condensation Equipment. The diagnosis results are precise and credible.

进一步证明了基于神经网络与专家系统结合的智能故障诊断方法能够很好地解决象凝汽设备这类故障具有多发性、不确定性等特点设备的故障诊断问题，其诊断结果精确、可靠。

However, the faults of the Condensation Equipment have pilosity nature, uncertainty and disguise which make difficulties for fault diagnosis of the Condensation Equipment. The fault sign and the fault reason of the Condensation Equipment have complex non-linear mapping relations, therefore it can not use simple model to describe. This has brought the puzzle for the classic fault diagnosis theory.

但是，凝汽设备的故障具有多发性、不确定性等特点，而且故障征兆与故障原因之间存在着复杂的非线性映射关系，很难建立合适的模型，因此运用经典故障诊断技术难以解决其诊断问题。

However, the ocular of hydraulic systems working condition is bad. It is difficult to obtain the parameter of hydraulic system. The fault of hydraulic system has pilosity nature, uncertainty and disguise. The fault sign and the fault reason of hydraulic system have complex non-linear mapping relations, therefore it cannot use the simple functional relation to describe. This has brought the difficulty for the classics fault diagnosis technology. The intelligent diagnosis technology base on ANN and ES can solove the above problem well and the diagnosis result is more accurate and reliable.

但是，液压系统工作状况直观性差，参数不易获取，故障具有多发性、不确定性和隐蔽性；液压系统故障征兆与故障原因之间存在复杂的非线性映射关系，不能用简单的函数关系来描述，给经典故障诊断技术带来了困难，而基于神经网络和专家系统的智能诊断技术很好的解决了上述问题，使诊断结果更加准确可靠。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。