A circular-sided square microcavity laser etched a central hole has achieved chaos operation with bandwidth of 20.8 GHz without external optical feedback or injection, in which the intensity probability distribution chaotic signal two-peak pattern was observed. Based on self-chaotic microlaser, physical random numbers at 400 Gb/s were generated by extracting four least significant bits other co...

Numerical findings of natural convection flows in a trapezoidal cavity are reported this study. This study focuses on the shift from symmetric steady to chaotic flow within cavity. has heated bottom wall, cooled top and adiabatic inclined sidewalls. The unsteady occurring numerically simulated using finite volume (FV) method. fluid used is air, calculations performed for different dimensionless...

In this letter, taking the well known (2+1)-dimensional soliton systems, Davey-Stewartson (DS) model and the asymmetric Nizhnik-Novikov-Veselov (ANNV) model, as two special examples, we show that some types of lower dimensional chaotic behaviors may be found in higher dimensional soliton systems. Especially, we derive the famous Lorenz system and its general form from the DS equation and the AN...

We investigate toy dynamical models of energy-level repulsion in quantum eigenvalue sequences. We focus on parametric (with respect to a running coupling or ”complexity” parameter) stochastic processes that are capable of relaxing towards a stationary regime (e. g. equilibrium, invariant asymptotic measure). In view of ergodic property, that makes them appropriate for the study of short-range f...

This paper implements a combined pseudo-random sequence generator based on neural networks and chaotic, random variable color images an algorithm for chaotic encryption, secure image storage, transmission. The that controls the operation of encryption algorithm: arrangement pixel positions, use AES to achieve creation algorithms, by dynamically updating control parameters numbers increase gener...

Walking, as an important transportation mode, plays a large part in urban transportation systems. This mode is of great importance for planners and decision-makers because of its impact on environmental and health aspects of communities. However, this mode is so complex in nature that makes it difficult to study or model. On the other hand, chaos theory studies complex dynamical nonlinear syste...

Analysis of nonlinear autonomous systems has been a popular field of study in recent decades. As an interesting nonlinear behavior, chaotic dynamics has been intensively investigated since Lorenz discovered the first physical evidence of chaos in his famous equations. Although many chaotic systems have been ever reported in the literature, a systematic and qualitative approach for chaos generat...

BACKGROUND National Strategic Plans (NSPs) for HIV have become foundational documents that frame responses to HIV. Both Global Fund and PEPFAR require coordination with NSPs as a component of their operations. Despite the role of NSPs in country planning, no rigorous assessment of NSP targets and performance outcomes exists. We performed a quantitative analysis of the quality of NSP indicators ...

A measure describing the chaos of a dynamics was introduced by two complexities in information dynamics, and it is called the chaos degree. In particular, the entropic chaos degree has been used to characterized several dynamical maps such that logistis, Baker’s, Tinckerbel’s in classical or quantum systems. In this paper, we give a new treatment of quantum chaos by defining the entropic chaos ...