The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Focusing on detection technology for autonomous underwater detection device which found marine target which radiated noise signal submerged in background noise, chaotic detector based on Duffing oscillator is researched. In this paper, the Duffing oscillator and chaotic detector based on Duffing oscillator are described. Through numerical simulation and theoretical analysis, it is proved that the...
This paper presents a new concept of PUF based on a chaotic behavior. Chaos is essentially not a random phenomenon but a deterministic non-periodic flow which can be utilized to extract reproducible unique ID entropy. The strong parametric sensitivity of the chaos guarantees ID variety and unclonability over unpredictable manufacturing variations. An undesirable disturbance due to dynamic parametric...
Feature selection is an important task in data mining, which aims to reduce the dimensionality of the data sets while at least maintaining the classification performance. Chicken swarm optimization algorithm (CSO) has been widely applied to feature selection because of its efficiency and effectiveness. However, since feature selection is a challenging task with a complex search space, CSO quickly...
This paper presents an investigation of the chaotic behavior of power electronic converters. The DC-DC converters are highly nonlinear devices. The switches and passive components make the behavior of these converters difficult to be characterized with the conventional analytical tools. Therefore, investigating modeling methods and analysis is necessary. Knowing the behavior of these converters allows...
In this paper is proposed the methodology for determining the true chaos from the position of nonlinear dynamics for distributed mechanical systems in the form of a beam structure of two beams described by the kinematic firstapproximation hypothesis (Euler-Bernoulli). There is a small gap between the beams. The lower beam (beam 2) will be considered as an elastic base for the upper beam (beam 1)....
This paper proposes a low-power, small formfactor all-digital RNG utilizing a concept of capacitive coupling between two ROs to amplify jitter and a dual-edge sampling scheme to increase the data rate. It is the most useful in battery-powered IoT applications where both energy and silicon area are critical constraints. The capacitive coupling effect with all digital circuit allows our design to operate...
This paper aims for the transmission of an RGB image mixed with a chaotic signal generated by the Sprott chaotic system which is simulated in Matlab-Simulink. Open-Plus-Closed-Loop is used in order to synchronize the systems from the Sprott's collection, only five cases of Sprott are shown which are known as cases A, B, C, H, and R. These cases were simulated to carry out the transmission of information,...
In the modern digital era, the storage of digital data in multi-users systems and transmission over the internet is prime important in the society. The cryptographic technique is one of the possible solutions for protecting digital information for unauthorized uses. In this technique, the encryption algorithm should be simple to design and implementation. In the proposed article, a novel color image...
The power/signal synchronous transmission between converters has attracted much attention since no extra independent signal transmitting equipment is required. In this paper, bifurcation behaviors of a cascaded two-stage Buck-Boost converter are discussed by simplifying the second stage boost converter as constant power load. The amplitude variation of the bus voltage caused by bifurcation is used...
A detection method of short-time double-Duffing chaotic oscillator array with variable amplitude coefficients (VASTD-Duffing) is proposed for the problem of Duffing chaotic oscillator system's miss detection generated by envelope fluctuation and distribution information in the time domain of the signals. A short-time characteristic window approach and periodic extension method to envelope fluctuation...
The short reference differential chaos shift keying (SR-DCSK) is a variant of DCSK which increases data rata and enhances energy efficiency without extra complexity. However, the advantages of bit error ratio (BER) performance of the SR-DCSK over the conventional DCSK is not notable even if the optimal length of reference signal is applied. In this paper, we propose an improved SR-DCSK scheme where...
This paper presents a chaotic analysis method based on adjacent data dependence, which is based on the distance change between adjacent data. The method converts complex one-dimensional raw data columns into new adjacent distance value sequences to avoid phase space reconstruction. In this paper, several typical chaotic models are analyzed to illustrate the effectiveness of the proposed method. Finally,...
This paper investigates the nonlinear dynamical features such as the bifurcation route of chaos and fractional structure in Superconducting Quantum Interference Device (SQUID). The dynamical equation of a superconducting quantum interference device composed of two Josephson junctions and a bias current source is derived, based on which we plot the bifurcation diagram and power spectral diagram of...
Contrary information is recorded in the process of Ribonucleic Acid transcription, which is similar to the anti-synchronization process. In this paper, the anti-synchronization of coupled Boolean networks is investigated. Firstly, the definition of anti-synchronization is introduced, and the drive-response Boolean networks dynamics are translated into linear representations with the semi-tensor product...
Although chaos based cryptology studies are an active research area, it does not make a significant contribution to the mainstream cryptology literature. Many design proposals have weaknesses. The most important reason is that the proposals are not adequately analyzed. For example, statistical tests such as NPCR and UACI are used in the analysis of chaos based image encryption algorithms. In this...
The chaotic system and cryptography have some common features. Due to the close relationship between chaotic system and cryptosystem, researchers try to combine the chaotic system with cryptosystem. In this study, security analysis of an encryption algorithm which aims to encrypt the data with ECG signals and chaotic functions was performed using the Logistic map in text encryption and Henon map in...
The death of the patients is an important event in the intensive care unit (ICU), mortality risk prediction thus offers much information for clinical decision making. However, Patient ICU mortality prediction faces challenges in many aspects, such as high dimensionality, imbalance distribution. In this paper, we modified the cost-sensitive principal component analysis (CSPCA), which is denoted by...
This paper studies chaotic behavior in cancer dynamics when a treatment procedure is introduced. Recently introduced virotherapy is considered for the cancer treatment. Chaotic behaviors are investigated by using the Lyapunov Exponent for a set of parameters. The chaotic behavior is studied by using the mathematical model of the cancer dynamics involving the virotherapy. Through simulations and the...
In order to achieve effective protection of digital image information and provide anti-attack capability for encrypted image, this paper proposed an ACP-based Approach to color image encryption using DNA sequence operation and hyper-chaotic system. By using the ACP method which is a way to solve the social computing problem, the influence of the chaotic data from the real world and the influence of...
This paper deals with the sensorless direct torque control (DTC) scheme for the permanent magnet synchronous motor (PMSM), where a new estimation algorithm is developed based on the polynomial chaos theory and the extended Kalman filter (EKF) for the sensorless obtaining of the rotor speed, stator flux and electromagnetic torque. The proposed estimator can effectively deal with parametric uncertainties...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.