摘要 :
A review of 22 empirical studies examining the use of constant (CTD) and progressive (PTD) time delay procedures employed with children with autism frames an indirect analysis of the demographic, procedural, methodological, and ou...
展开
A review of 22 empirical studies examining the use of constant (CTD) and progressive (PTD) time delay procedures employed with children with autism frames an indirect analysis of the demographic, procedural, methodological, and outcome parameters of existing research. None of the previous manuscripts compared the two response prompting procedures. This review suggests that the effectiveness of the two procedures is similar on some variables. However, the CTD procedure resulted in more errors to criterion, a greater magnitude of procedural modifications, and in a delayed moment of transfer of stimulus control than in the PTD studies. Conclusions may influence clinical and educational practices and indicate a need for research.
收起
摘要 :
A review of 22 empirical studies examining theuse of constant (CTD) and progressive (PTD) time delayprocedures employed with children with autism frames anindirect analysis of the demographic, procedural, method-ological, and outc...
展开
A review of 22 empirical studies examining theuse of constant (CTD) and progressive (PTD) time delayprocedures employed with children with autism frames anindirect analysis of the demographic, procedural, method-ological, and outcome parameters of existing research.None of the previous manuscripts compared the two re-sponse prompting procedures. This review suggests that theeffectiveness of the two procedures is similar on somevariables. However, the CTD procedure resulted in moreerrors to criterion, a greater magnitude of proceduralmodifications, and in a delayed moment of transfer ofstimulus control than in the PTD studies. Conclusions mayinfluence clinical and educational practices and indicate aneed for research.
收起
摘要 :
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationshi...
展开
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationship between these delay times and the delay time in chaotic oscillators is maintained. Furthermore, a systematic procedure for designing a feedback gain and the multiple delay times is provided. These analytical results are experimentally verified by the Mackey-Glass type circuit.
收起
摘要 :
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationshi...
展开
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationship between these delay times and the delay time in chaotic oscillators is maintained. Furthermore, a systematic procedure for designing a feedback gain and the multiple delay times is provided. These analytical results are experimentally verified by the Mackey-Glass type circuit.
收起
摘要 :
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationshi...
展开
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationship between these delay times and the delay time in chaotic oscillators is maintained. Furthermore, a systematic procedure for designing a feedback gain and the multiple delay times is provided. These analytical results are experimentally verified by the Mackey-Glass type circuit.
收起
摘要 :
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationshi...
展开
The present report shows that unstable fixed points of time-delay chaotic oscillators can be stabilized by a multiple time-delay feedback method. This method has a feature that any long delay times are available when a relationship between these delay times and the delay time in chaotic oscillators is maintained. Furthermore, a systematic procedure for designing a feedback gain and the multiple delay times is provided. These analytical results are experimentally verified by the Mackey-Glass type circuit.
收起
摘要 :
In this Letter, dual synchronization in modulated time delay system using delay feedback controller is proposed. Based on Lyapunov stability theory, we suggest a general method to achieve the dual-anticipating, dual, dual-lag sync...
展开
In this Letter, dual synchronization in modulated time delay system using delay feedback controller is proposed. Based on Lyapunov stability theory, we suggest a general method to achieve the dual-anticipating, dual, dual-lag synchronization of time-delayed chaotic systems and we find both its existing and sufficient stability conditions. Numerically it is shown that the dual synchronization is also possible when driving system contain two completely different systems. Effect of parameter mismatch on dual synchronization is also discussed. As an example, numerical simulations for the Mackey-Glass and Ikeda systems are conducted, which is in good agreement with the theoretical analysis.
收起
摘要 :
In this paper, the phase-conditionally stable feature of a closed-loop system is introduced. In any control loop, time delays appear and can produce unexpected changes in the controlled-system performances. Usually, these effects ...
展开
In this paper, the phase-conditionally stable feature of a closed-loop system is introduced. In any control loop, time delays appear and can produce unexpected changes in the controlled-system performances. Usually, these effects are negative and performance is degraded. The possible positive effect of the delays in avoiding oscillatory plant response is here considered. For that purpose, the effect of additional measurement delays, filters or dead time in resonant systems, is analyzed. Some examples illustrate the results. Other than the possible practical relevance of the results, the concepts involved are very important for the control engineers at educational level. (C) 2006 Elsevier B.V. All rights reserved.
收起
摘要 :
In this paper the stability problem of continuous and discrete time fuzzy large-scale systems with uncertainties is studied. Each of these systems consists of J interconnected subsystems which are represented by Takagi-Sugeno mode...
展开
In this paper the stability problem of continuous and discrete time fuzzy large-scale systems with uncertainties is studied. Each of these systems consists of J interconnected subsystems which are represented by Takagi-Sugeno models. The stability conditions are derived by using vector Lyapunov function approach and expressed in terms of linear matrix inequalities. Two examples are given to demonstrate the correctness of the results. (c) 2005 Elsevier Ltd. All rights reserved.
收起
摘要 :
We present a method and devices for highly resolved carrier and information extraction of optically modulated radar signals. The extraction is done by passing the optical beam through a monitoring path that constitutes a finite im...
展开
We present a method and devices for highly resolved carrier and information extraction of optically modulated radar signals. The extraction is done by passing the optical beam through a monitoring path that constitutes a finite impulse response filter. Replications of the monitoring signal realize the required spectral scan of the filter. Despite the fact that the filter configuration is fixed, each replication experiences different spectral filtering. The radar carrier is detected by observing the energy fluctuations in a low-rate output detector. The RF information is extracted by positioning a low-rate tunable filter at the detected carrier frequency. (C) 2005 Optical Society of America.
收起
原文获取