- Iasi, Iaşi, Romania
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This driven top is quite a novelty and can, with some trials, be made using the principles outlined here. This new top has many applications in developing both understanding and skills and these are detailed in the article. Depending on... more
This driven top is quite a novelty and can, with some trials, be made using the principles outlined here. This new top has many applications in developing both understanding and skills and these are detailed in the article. Depending on reader's available time and motivation they may feel an urge to make one themselves, or simply invest a few pounds in the one that has been designed, tested and manufactured to a high standard. Either way the unique design of the driven top can provide several hours of interesting experimentation. Our aim here is simply to inform and inspire readers to further investigation and experimentation.
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The main goal of this paper is to study the synchronization of two identical chemical chaotic systems proposed by Peng and coworkers, which is based on six rections and three intermediary species, using an adaptive feedback method. The... more
The main goal of this paper is to study the synchronization of two identical chemical chaotic systems proposed by Peng and coworkers, which is based on six rections and three intermediary species, using an adaptive feedback method. The transient time until synchronization depends on initial conditions of two systems, the strength and the number of the controllers. To achieve the synchronization is absolutely necessary to use two controllers, for example in the second and in the third equation from the slave system; if the time of synchronization might be longer than the previous case we can use only one controller, applied in the second equation of the tridimensional system.
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Synchrony is an amazing natural phenomenon ubiquitous in the living world and also verified in laboratory scale systems: chemical reaction, laser, and electronic circuits. Over the last two decades, the theoretical framework of... more
Synchrony is an amazing natural phenomenon ubiquitous in the living world and also verified in laboratory scale systems: chemical reaction, laser, and electronic circuits. Over the last two decades, the theoretical framework of synchronization of nonlinear oscillators, limit cycle and chaotic, is mainly established under unidirectional or mutual interactions and with complex topology. However, most of the theories start with an approximation of identical oscillators to reduce the burden of mathematical complexity to develop an understanding ...
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A computer experiment for a driven gravitational pendulum is presented. It is shown linear and nonlinear and chaotic behaviour.
In this work we present the synchronization of two Lotka-Volterra with four competitive species in order to formulate the biological control with two preys, two predators. Our results show that the transient until synchronization depends... more
In this work we present the synchronization of two Lotka-Volterra with four competitive species in order to formulate the biological control with two preys, two predators. Our results show that the transient until synchronization depends on the initial conditions of two systems and on the control strength. For practical reasons we need a single controller in order to achieve the synchronization; for these systems the synchronization is about four times faster when we use all the controllers than when we use a single controller. In addition the only way we can use a single controller is if we apply it in the first or in the third equation. If we must interfere on the second population, we must use two controllers. We suggest that we can control the pests by synchronizing the pest population with the population of the parasitoid by varying the initial conditions and the control strength.
ABSTRACT In this study we propose a novel method for discrimination of the attributes of biomedical sensory datasets using Master-Slave Synchronization of chaotic Lorenz Systems. As part of the performance testing, three benchmark... more
ABSTRACT In this study we propose a novel method for discrimination of the attributes of biomedical sensory datasets using Master-Slave Synchronization of chaotic Lorenz Systems. As part of the performance testing, three benchmark biomedical datasets (Vertebral Column dataset, E. Coli dataset and Iris dataset) were presented to our novel algorithm and the output vector were then used as input matrices to three classifier algorithms, namely Artificial Neural Networks (ANN), Decision Tree (DT) and K-Nearest Neighbour (KNN). The performance of the classifiers was then evaluated using the original and pre-processed datasets.
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It is well known that the human genome presents enormous DNA sequences formed mostly by introns, only 5 - 10% of the human genome correspond to exons. Exons are the part of DNA sequences known to code for some protein synthesis, while... more
It is well known that the human genome presents enormous DNA sequences formed mostly by introns, only 5 - 10% of the human genome correspond to exons. Exons are the part of DNA sequences known to code for some protein synthesis, while introns are portions located in between exons with no apparent biological function (5,6,7). The role of introns and intergenic sequences constituting large portions of the genome remains unknown. In the last time has been an enormous interest in unrevealing the mysteries of DNA (8,9). It has become very important to improve on new theoretical methods for analysis the DNA sequence and develop new tools for analysis with a view toward uncovering mechanisms used to code other types of information. For this moment, only a few quantitative methods are available for analyzing information, which is possibly encrypted in the noncoding part of the human genome. Statistical analysis of DNA sequences using modern statistical methods is proven to be encouraging. R...
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ABSTRACT Jackson and Grosu developed a method for controlling complex dynamic systems that employs an open-plus-closed-loop control components (the OPCL method), and proved that it is capable of entraining the dynamics of standard dynamic... more
ABSTRACT Jackson and Grosu developed a method for controlling complex dynamic systems that employs an open-plus-closed-loop control components (the OPCL method), and proved that it is capable of entraining the dynamics of standard dynamic systems to arbitrary goal dynamics, g(t) ∈ Rn [Jackson & Grosu, 1995]. Rather than use this control for entrainment, one of us has shown [Jackson, 1995] how the OPCL can be easily employed to transfer the dynamics of a multiple-attractor system from one attractor to another ("migration controls" [Jackson, 1990]). For this purpose, a Chua-circuit model with five distinct attractors was used. In the present study we will show how to experimentally implement the OPCL migration control on such a circuit, by using prerecorded signals, which makes it possible to restrict the control action to only one dynamic component.