Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
In this paper, the results of outdoor-to-indoor multiple-input multiple-output (MIMO) channel measurements at 780 MHz are presented. The motivation for these measurements was to provide actual measurement data needed to extend the International Mobile Telecommunications -Advanced (IMT-A) channel models to the frequencies around 400 - 900 MHz. There are publications reporting measurement results for...
The heterogeneous radio system is one approach to cognitive radio and a great candidate for creating a new fundamental network that improves the efficiency of frequency resource usage. In this paper, our target is to aggregate the adaptive link of multiple radio systems into a single rich link. Generally, time delays differ among multiple different radio systems, which cause the TCP performance to...
In wireless mesh networks, scheduling is the bottleneck of the cross-layer design approach. Thus, it is surprising that CSMA is utility-optimal if it is used traffic-adaptive. However, the price to pay is short-term fairness and thus end-to-end delay. In this paper, we propose a step size adaptation algorithm that combines the advantages of small and large step sizes in a way that the convergence...
This paper addresses the problem of sharing primary frequency control reserves among non-synchronous AC systems connected by a multi-terminal HVDC grid. We focus on a control scheme that modifies the power injections from the different areas into the DC grid based on remote measurements of the other areas' frequencies. This scheme is proposed and applied to a simplified system in a previous work by...
The robust stability of uncertain linear neutral systems with multiple delays is investigated in this paper. For the neutral systems with equal neutral and discrete delays, we established a new integral inequality which is specifically suitable for the stability analysis of such neutral systems. Based on the inequality, the delay-dependent stability criteria with reduced conservatism are derived without...
State class methods are a fundamental and most widely applied technique for timing analysis of Time Petri Nets (TPNs). However, the existing state class methods are not suitable for the computation of global time delay, which is an important issue for real-time systems. This paper presents a state class method for the analysis and verification of global time properties in TPNs that addresses the problem...
In this paper, a neuro-fuzzy control-based approach is used for networked control systems to overcome the negative effects of the network-induced delays. This approach can timely modify the weights of the adaptive controller to improve control performance. Finally, by modeling networked control system with Matlab truetime toolbox, and the simulation results show that networked control systems based...
Let T be a time scale. Let T be a time scale. We study the existence of positive solutions for the nonlinear three-point singular boundary value problem with higher-order p-Laplacian dynamic delay differential equations on time scales, subject to some boundary conditions. By using the fixed-point index theory, the existence of positive solution and many positive solutions for nonlinear four-point...
The delay-dependent adaptive variable structure control problem for a class of uncertain time-delay Markov jump hybrid systems is considered. Under the assumption of matched system uncertainties, the sufficient conditions are proposed to guarantee exponentially stable in the mean square of reduced-order sliding mode system in terms of delay-dependent matrix inequalities. Under the assumption of matched...
Network Calculus is a set of recent developments that provide deep performance analysis of communication networks. Central to the theory is the use of alternate algebras such as the min-plus algebra to transform complex network systems into analytically tractable systems. With network calculus, we are able to understand some fundamental properties of integrated services networks, window flow control,...
In this paper, a new direct adaptive interval type-2 fuzzy controller is proposed to synchronize between two different chaotic time-delay systems with noisy training data or rule uncertainties. Based on the adaptive time-delay interval type-2 fuzzy logic systems in which linguistic fuzzy control rules can be directly incorporated into the controller and by adjusting weights, centers and widths, the...
This paper is concerned with the guaranteed cost fault tolerant control of networked control systems with both time-varying network-induces delay and data dropout. Using LMI approach, new criteria are proposed for the networked guaranteed cost controller design. The new criteria are irrelevant to the bound of the derivative of the delay, no constrain is imposed to the matrix structure. A numerical...
For many control systems, control performance is strongly dependent on delay variations of the control tasks. Such variations can come from a number of sources including task preemptions, variations in task workloads and perturbations in the physical environment. Existing work has considered improving control task delay variations due to task preemption only. This paper presents a general adaptive...
In this paper, an improved blind source separation algorithm based on generalized variance is proposed. The observation signal is partitioned to nonoverlapping blocks and the covariance matrix is estimated at some time delay. An algorithm that converts the nonpositive definite covariance matrix into positive definite matrix is presented; thus, without searching for the positive definite covariance...
In wireless sensor network studies the main objective is minimizing the energy consumption so that the lifetime is maximized under the limited battery capacity constraints. In most event-driven surveillance applications, the end-to-end delay should also be minimized. In this paper we present a new EDO-MAC (energy and delay optimization Media Access Control) which reaches a good balance between energy...
In the paper, support vector machine is adopted to predict the time delay induced in the networked control system by using time delay historical data. We employ the reaction curve of sine to testify the feasibility of support vector machine. Finally, BP neural network delay predictor is used to compare with support vector machine delay predictor. The testing results demonstrate that the prediction...
This paper considered the non-fragile guaranteed cost fault tolerant control problem of networked control systems with both fast-varying network-induces delay and data dropout. Using Lyapunov stability theory and the linear matrix inequality (LMI) approach, new criteria are proposed for the non-fragile controller design. A simulation example is given to verify the validity of the proposed method.
This paper is concerned with the state feed-back guaranteed cost fault tolerant control of networked control systems with both network-induces delay and data dropout. Using LMI approach, The sufficient condition for the existence of the networked guaranteed quadratic cost controller is obtained in terms of matrix inequalities, and the controller design method is deduced in terms of linear matrix inequalities...
In this paper we consider the approximate controllability for a class of semilinear delayed control systems described by a semigroup formulation with boundary control and nonlinear perturbations appearing in boundary conditions. Sufficient conditions for approximate controllability are established provided the approximate controllability of corresponding linear systems.
The key point of the network control systems is that conventional generalized predictive control algorithm cannot deal with random delays, packet losses and vacant sampling. In this paper, the time-stamped multivariable generalized predictive control (TSMGPC) was proposed to deal with this problem. The TSMGPC used time-stamped to calculate the real delay, and the LMS algorithm to estimate the induced...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.