Results 261 to 270 of about 1,063,307 (308)

Application of Uncertain Variables

2004
The purpose of this chapter is to show how uncertain variables may be applied to analysis and decision problems for a static plant. In the parametric case, we assume that the unknown parameters in the function or the relation describing the plant are values of uncertain variables described by certainty distributions given by an expert.
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Extending the Continuous Logic to Uncertain Variables

Automation and Remote Control, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Variable structure control for uncertain system

2017 36th Chinese Control Conference (CCC), 2017
This paper is devoted to investigating the problems of the variable structure control and optimization for a class of time delay systems, which contain matched uncertainty and unmatched uncertainty, time-varying delay in state of system. Firstly, some special transformation is made for the considered system to obtain an equivalent system.
Dan Zhao, Heli Hu, Te Bai, Yuyang Bai, Xiaoyu Liang, Yiran Wang   +5 more
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Hybrid reliability analysis with uncertain statistical variables, sparse variables and interval variables

Engineering Optimization, 2017
ABSTRACTThere are differences among sampling data and representation types of uncertain statistical variables, sparse variables and interval variables, which increase the complexity of structure reliability analysis. Therefore, a hybrid first order reliability analysis method considering the three types of uncertain variables is demonstrated in this ...
Xiang Peng, Tianji Wu, Jiquan Li, Shaofei Jiang, Chan Qiu, Bing Yi   +5 more
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Moment Generating Function of Uncertain Variable

2018 10th International Conference on Intelligent Human-Machine Systems and Cybernetics (IHMSC), 2018
Within the framework of uncertainty theory, this paper focuses on the moment generating function of an uncertain variable, which is a useful mathematical analytic tool to deal with uncertain variable. Furthermore, as an extension of moment generating function, Laplace transform of any nonnegative uncertain variable is discussed and some results between
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A Framework to Estimate Uncertain Random Variables

45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics & Materials Conference, 2004
Many engineering applications are characterized by the innate challenge of acquiring experimental data. This lack of available data hampers the selection of the probability density function (PDF) and introduces a level of arbitrariness in the ensuing risk analysis. This paper presents an approach to estimate the uncertainty in the PDF shape.
Ben Thacker, Luc Huyse
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Uncertain Variables in the Computer Aided Analysis of Uncertain Systems

2000
The paper is concerned with static uncertain systems described by a function or by a relation. Unknown parameters in the mathematical models are considered as so called uncertain variables described by certainty distributions given by an expert. Two versions of the uncertain variables based on two versions of uncertain logics are defined. In the second
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Constrained mathematics analysis of uncertain variables

SMC'98 Conference Proceedings. 1998 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No.98CH36218), 2002
Analyses (e.g., safety analyses and reliability analyses) that are based on variable or uncertain inputs need to reflect the ranges of potential output variability or uncertainty. A challenging problem in mathematically processing the operands is that constraints inherent in the problem definition can require computations that are difficult to ...
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Uncertain Variables as a Tool for Design of Uncertain Control Systems

Proceedings of the 44th IEEE Conference on Decision and Control, 2006
The paper is concerned with closed-loop control systems with unknown parameters which are assumed to be values of uncertain variables described by certainty distributions given by an expert. The non-parametric optimization problem and three versions of the parametric optimization problem based on the uncertain variables are described.
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Uncertain variables and their applications for a class of uncertain systems

International Journal of Systems Science, 2001
This paper presents definitions and basic properties of uncertain variables and shows how they may be applied to the analysis and decision making in static systems with unknown parameters in their mathematical models. The unknown parameters are assumed to be uncertain variables described by certainty distributions given by an expert.
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