Results 1 to 10 of about 23,378 (222)

Spread spectrum modulation recognition based on phase diagram entropy [PDF]

open access: goldFrontiers in Signal Processing, 2023
Wireless communication technologies are undergoing intensive study and are experiencing accelerated progress which leads to a large increase in the number of end-users. Because of this, the radio spectrum has become more crowded than ever.
Denis Stanescu   +6 more
doaj   +2 more sources

Corrigendum: Spread spectrum modulation recognition based on phase diagram entropy [PDF]

open access: goldFrontiers in Signal Processing, 2023
Denis Stanescu   +6 more
doaj   +2 more sources

Entropy-Based Characterization of the Transient Phenomena—Systemic Approach

open access: yesMathematics, 2021
The difficulties of predictive maintenance of power grids are related to the large spread of electrical infrastructures and the definition of early warning indicators. Such indicator is the partial discharge activities—which can be very informative about
Denis Stanescu   +3 more
doaj   +1 more source

A Hidden Chaotic System with Multiple Attractors

open access: yesEntropy, 2021
This paper reports a hidden chaotic system without equilibrium point. The proposed system is studied by the software of MATLAB R2018 through several numerical methods, including Largest Lyapunov exponent, bifurcation diagram, phase diagram, Poincaré map,
Xiefu Zhang   +4 more
doaj   +1 more source

Research on the Threshold Determination Method of the Duffing Chaotic System Based on Improved Permutation Entropy and Poincaré Mapping

open access: yesEntropy, 2023
The transition from a chaotic to a periodic state in the Duffing chaotic oscillator detection system is crucial in detecting weak signals. However, accurately determining the critical threshold for this transition remains a challenging problem ...
Jing Zhou, Yaan Li, Mingzhou Wang
doaj   +1 more source

Effective Design of Cr-Co-Ni-Ta Eutectic Medium Entropy Alloys with High Compressive Properties Using Combined CALPHAD and Experimental Approaches

open access: yesApplied Sciences, 2021
Alloy design of Cr-Co-Ni-Ta eutectic medium entropy alloys (EMEAs) was performed through a CALPHAD method coupled with experimental study, with the aim to attain high phase stability as well as excellent mechanical properties.
Taiwen Huang   +3 more
doaj   +1 more source

Coexisting Infinite Orbits in an Area-Preserving Lozi Map

open access: yesEntropy, 2020
Extreme multistability with coexisting infinite orbits has been reported in many continuous memristor-based dynamical circuits and systems, but rarely in discrete dynamical systems.
Houzhen Li   +3 more
doaj   +1 more source

A New Fractional Chaotic System and Its Application in Image Encryption With DNA Mutation

open access: yesIEEE Access, 2021
In this paper, a color image encryption algorithm based on the fractional-order multi-scroll Chen chaotic system and DNA mutation principle is proposed.
Jin Hao   +3 more
doaj   +1 more source

Effect of pre-transitional element X on structure and performance of TiAlXN coatings

open access: yesCailiao gongcheng, 2022
The TiAlN-based coatings have good mechanical and anti-oxidation properties. Therefore, they have been widely used in the surface protection of typical mechanical parts, such as aero-engine compressor blades, cutting tools and precision molds.
WANG Lu   +6 more
doaj   +1 more source

Searching for Next Single-Phase High-Entropy Alloy Compositions

open access: yesEntropy, 2013
There has been considerable technological interest in high-entropy alloys (HEAs) since the initial publications on the topic appeared in 2004. However, only several of the alloys investigated are truly single-phase solid solution compositions.
David E. Alman, Michael C. Gao
doaj   +1 more source

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