Analysis of complex systems such as hierarchically structured network systems that are employed in modelling and analysis various aspects and issues of control and management in telecommunications is investigated. The...
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Real-time scheduling methods introduce various types of jitter in task instance execution. For real-time computer-controlled systems, the introduced sampling jitter and sampling-actuation delays may degrade the system...
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Real-time scheduling methods introduce various types of jitter in task instance execution. For real-time computer-controlled systems, the introduced sampling jitter and sampling-actuation delays may degrade the system performance and even lead to instability in the system. The degradation of the system performance can be compensated on-line by updating the controller parameters at each controller task instance execution, in what we call the compensation approach. In this paper we present stability analysis for controller tasks that perform the compensation approach.
Repetitive processes are a distinct class of 2D systems of both theoretical and applications interest. They are characterized by a series of sweeps through a set of dynamics with explicit interaction between the outpu...
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Repetitive processes are a distinct class of 2D systems of both theoretical and applications interest. They are characterized by a series of sweeps through a set of dynamics with explicit interaction between the outputs, or pass profiles, produced on successive passes. Their essential unique features are that (i) information propagation is over a finite duration in one of the two separate directions of information propagation; and (ii) the explicit interaction between successive pass profiles can lead to oscillations in the sequence of pass profiles that increase in amplitude in the pass to pass direction. In the case of processes with linear dynamics (either differential or discrete) a reasonably rich systems theory is available for models which are standard (or nonsingular). In this paper, we provide the first substantial results on discrete linear repetitive processes described by a singular state space model.
In general, characteristics of classical control theory and properties of real-time scheduling algorithms may cause unexpected control system responses in the implementation of real-time computer-controlled systems. R...
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In general, characteristics of classical control theory and properties of real-time scheduling algorithms may cause unexpected control system responses in the implementation of real-time computer-controlled systems. Revising real-time scheduling properties, we analyse which are the main timing problems that current scheduling algorithms may introduce in the execution of control loops. Next, we categorise those timing problems, that is, jitters on task-instances executions, in a control context. Afterwards, we show, by simulations, different types of control system performance degradation that these jitters may cause. Finally, we propose possible solutions that solves this degradation, based on irregular sampling discrete-time system models with varying time delays.
The problem of adaptive state feedback exponentially practically stabilizing a class of composite system with uncertainty and disturbance is considered. The uncertainties of the system can be non linear or time-varyin...
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The problem of adaptive state feedback exponentially practically stabilizing a class of composite system with uncertainty and disturbance is considered. The uncertainties of the system can be non linear or time-varying. The bounds of the uncertainties exist, but are unknown. A designing scheme of exponentially stable adaptive controller of the system, which can guarantee the state of the system to reach the prescribed equilibrium point's nearby region in limited time, is given. Finally, the simulations performed show the validity of the new result derived.
A class of generalized interconnected systems, possessing similar linear structure and non linear unmatched interconnections, is studied in this paper. Hence a new topic of similarity systems research is presented. Dy...
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A class of generalized interconnected systems, possessing similar linear structure and non linear unmatched interconnections, is studied in this paper. Hence a new topic of similarity systems research is presented. Dynamic compensators are designed so that the closed-loop systems of the original systems and the compensators are asymptotically stable and have no impulse effect. Compensators also possess similar structures and are realized easily, so that a destroyed compensator is easily reproduced.
The problem of the pricing equilibrium in multi-service priority-based networks isstudied by using Stackelberg game theory. Some concepts of the game theory were revisited first. Then, the existing results on two-user...
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The problem of the pricing equilibrium in multi-service priority-based networks isstudied by using Stackelberg game theory. Some concepts of the game theory were revisited first. Then, the existing results on two-user, twolevel Nash problem was reviewed briefly. Following this background, a new one-leader, two-level, two-user incentive Stackelberg strategy was derived and proved by employing the time delay involved.
The problem of networking supervision and traffic rate control in multi-service network systems is studied by using concepts of Nash equilibrium and Stackelberg strategy under assumption of two-level system architectu...
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The problem of networking supervision and traffic rate control in multi-service network systems is studied by using concepts of Nash equilibrium and Stackelberg strategy under assumption of two-level system architecture. Models of users, network provider and overall system in game-theoretic setting are presented. Linear Stackelberg incentive strategies are derived for both elastic and non-elastic traffic, and verified using Kelly's example. Outlines of the two-level integrated control and supervision architecture, and of the proposed fuzzy-Perti-net supervisor are given.
In industrial photogrammetric measurement with CCD cameras, the number of target images may amount to several hundred when large and complex objects are involved. It is therefore impractical to use solely manual means...
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This paper presents a novel watermarking technique for digital audio signals. A visually recognizable binary image served as a watermark is embedded into an audio signal in discrete cosine transform domain. In order t...
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ISBN:
(纸本)7801501144
This paper presents a novel watermarking technique for digital audio signals. A visually recognizable binary image served as a watermark is embedded into an audio signal in discrete cosine transform domain. In order to enhance robustness and make good use of masking characteristics of the audio signal, the techniques of pseudo-random permutation and energy-based permutation are used during watermarking. The experimental results show that the proposed watermarking technique is robust to several signal manipulations, such as filtering, compression, and so on.
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