A Diagnostic Technique for Generalized Synchronization in Systems with a Complex Chaotic Attractor Topology

AbstractA diagnostic technique is proposed for the mode of generalized synchronization in systems with a complex chaotic attractor topology based on consideration of tubes of trajectories in the phase space of interacting systems. The method functionality is tested by the numerical simulation of two mutually coupled modified Lorentz systems: one in the chaotic state, and another in the hyperchaotic state. The results are compared to the data obtained by calculating the Lyapunov exponent spectrum and show good agreement.

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A New Approach to Breaking Down Chaotic Secure Communication

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127403008193 ◽

2003 ◽

Vol 13 (09) ◽

pp. 2689-2698 ◽

Cited By ~ 2

Author(s):

Chao Tao ◽

Gonghuan Du

Keyword(s):

Fixed Point ◽

Chaotic Attractor ◽

Secure Communication ◽

Time Varying ◽

Generalized Synchronization ◽

Stable Fixed Point ◽

Chaotic Communication ◽

New Approach ◽

System Parameters ◽

Chaotic Secure Communication

In this paper, we propose the time-varying stable fixed point concept to advance the generalized synchronization and present a general approach to calculating the value of chaotic system parameters according to some signal data. It provides a new approach to studying an unknown chaotic attractor and unmask the chaotic communication. We break down two chaotic communication schemes as examples with this approach.

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Перемежающееся поведение на границе обобщенной синхронизации во взаимно связанных системах со сложной топологией аттрактора

Журнал технической физики ◽

10.21883/jtf.2019.03.47165.325-18 ◽

2019 ◽

Vol 89 (3) ◽

pp. 338

Author(s):

О.И. Москаленко ◽

А.А. Короновский ◽

В.А. Ханадеев

Keyword(s):

Chaotic Attractor ◽

Coupled Systems ◽

Generalized Synchronization ◽

Imaging Point ◽

Supercriticality Parameter

AbstractThe mechanisms of occurrence and characteristics of intermittency at the boundary of generalized synchronization in mutually coupled systems with complex (two-sheet) chaotic attractor topology are investigated. It has been established that the occurrence of intermittency in this case is due to the imaging point jump from one sheet of the chaotic attractor to another. At the same time, distributions of laminar phase durations and dependences of average laminar phase durations on the supercriticality parameter obey exponential laws.

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Aspiration cytology and transmission electron microscopy (TEM): A novel tissue-collection technique with useful diagnostic applications

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110751 ◽

1984 ◽

Vol 42 ◽

pp. 90-93

Author(s):

J.A. Maksem ◽

C. VanDyke ◽

H.W. Carter ◽

C.F. Galang

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Diagnostic Technique ◽

Needle Aspiration ◽

Large Series ◽

Aspiration Cytology ◽

Fine Needle ◽

Transmission Electron ◽

Diagnostic Applications ◽

Microscopic Slide

In the last decade fine needle aspiraration biopsy has gained recognition as a valuable diagnostic technique, and its benefits have been demonstrated in large series of patients with almost every type of tumor (1,2). The usual way to collect cellular material from needle-aspiration biopsies is to discharge the needle and syringe contents onto a microscopic slide and smear the material with another slide. The entire specimen is contained on the slides prepared at the time of biopsy. Serious technical difficulties are inherent to this method. 1) Inconsistent fixation, 2) drying artifact, 3) loss of tissue fragments, 4) inability to confirm impressions by a “second method”, and 5) retention of significant diagnostic material in the needle hub. Our technique avoids these difficulties.

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