查询词典 uncertainties

Therefore, the robust feedback linearization control is obtained.(2) For affine nonlinear systems with parameter uncertainties, a novel nonlinear state observer is constructed. Under nonlinear feedback control based on observed state, the regulated system state is guaranteed to enter and remain in a enough small neighborhood of origin.

对仿射非线性系统，考虑其参数的不确定性，设计了一种新型的非线性状态观测器，通过调节观测器和控制器的参数，可使系统在基于观测状态的控制下，调节状态到原点的一个足够小表示领域内。

In this project, we have tackled the robust fault detection and diagnosis problem for affine nonlinear sampled-data systems based on nonlinear H∞ filtering theory,and focused on the design of robust fault dtetction filter. The main contribution of this project is that we (1)present design methods of robust fault estimator for nonlinear discrete-time systems based on least square estimation and linear matrix inequality;(2)improve the bounded real lemma of systems with finite discrete jumps;(3)develop the robust fault detection filters for affine nonlinear sampled-data systems with parameter uncertainties based on the improved bounded real lemma.

本项目以提高故障的正确检测率为目的，以非线性H∞滤波理论为基础，对不确定仿射非线性采样系统的鲁棒故障检测与诊断问题进行了研究，重点研究了不确定仿射非线性采样系统的鲁棒故障检测滤波器设计问题，取得了一些新的成果，主要成果有：(1)基于最小二乘估计和线性矩阵不等式，给出了非线性离散系统的鲁棒故障估计器设计方法；(2)改进了有限跳跃点系统的有界实引理；（3）基于改进的有界实引理，给出了不确定仿射非线性采样系统的鲁棒故障检测滤波器的设计方法。

Thirdly, the linearization problem of affine nonlinear systems with uncertainties is discussed.

然后，本文讨论了具有不确定性的仿射非线性系统的线性化问题。

Uncertainties exist in either aleatory variability or epistemic uncertainty, but a weighted average of various alternatives in probabilistic seismic hazard analysis and the combination in methodology of PSHA and DSHA (deterministic seismic hazard analysis) should better prevent it from producing an extremely biased output of hazard estimates.

由于输入模型中不确定因素的存在，如输入参数的随机性和科学分析方法本身的不确定性，对分析结果的不确定性需审慎对待。通常对不同的模型或参量，包括地面衰减模型，进行加权平均可较为合理地减小结果的偏差。概率分析和确定性分析方法的结合亦为可取之有效途径。

In antiquity, just like today, people had a lot of uncertainties in life

在古代，和现在一样，人们生活中有很多不可知的事情

Actually,there are lots of uncertainties in real systems,such as model approximation, algorithm error etc,which have great impact on dynamic stabilities.

实际上，由于模型的近似表示和算法上的近似处理等，电力系统中还存在着大量的不确定性。

For the design of the sliding mode control of time-delay large-scale systems, we propose the adaptive fuzzy sliding mode control schemes, and the fuzzy approximator is used to approximate the upper bound of the uncertainties which combine time-delay interconnections with perturbations in the system.

所以，我们针对具时间延迟的大型系统的滑动模式控制设计上提出了一个适应模糊滑动模式控制方法，其中，模糊近似器被用来近似系统当中时间延迟以及扰动相互结合后的上界。

The synthesis provides a practical step by step procedure such that the influence from the disturbance to the controlled output can be arbitrarily small subject to nonlinear uncertainties, and internal system is asymptotically stable.

该文的综合方法提供了可行的设计控制器的步骤。所设计的控制器，能保证闭环系统在容许的不确定性条件下，从干扰到输出的影响可能任意地小，并能保证系统是内稳定的。

An increment feedback control law is then developed and proved to balance the pendulum-angle and drive the cart to track an arbitrary position without estimating the parameter uncertainties .

通过对系统输出的递归分解迭代设计，构成了扩展状态空间上的复杂非线性滑模，结合增量反馈控制，无需对系统不确定性的估计，可以稳定摆的倒立并将小车驱动到任意的距离。

"Zhang Jian Qiu count as" Communication is the question 92, the achievements of the more prominent and there is the common denominator least common multiple of the calculation, the arithmetic progression of the problem to solve, some uncertainties, such as problem solving equation.

张丘建算经》现传本有92问，比较突出的成就有最大公约数与最小公倍数的计算，各种等差数列问题的解决、某些不定方程问题求解等。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。