Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Michaël Antonie Van Wyk"'
Publikováno v:
Viruses, Vol 14, Iss 7, p 1482 (2022)
Vaccination is an important means to fight against the spread of the SARS-CoV-2 virus and its variants. In this work, we propose a general susceptible-vaccinated-exposed-infected-hospitalized-removed (SVEIHR) model and derive its basic and effective
Externí odkaz:
https://doaj.org/article/58a3c8d6a5df4606a41722c101a84fde
Publikováno v:
Mathematics, Vol 9, Iss 24, p 3305 (2021)
This paper proposes a class of time-delay fractional complex Lu¨ system and utilizes the adomian decomposition algorithm to study the dynamics of the system. Firstly, the time chaotic attractor, coexistence attractor and parameter space are studied.
Externí odkaz:
https://doaj.org/article/424bc74e6c9f48358f977f737d6948a4
Vaccination is an important means to fight against the spread of the SARS-CoV-2 virus and its variants. In this work, we propose a general susceptible-vaccinated-exposed-infected-hospitalized-removed (SVEIHR) model and derive its basic and effective
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd0b903de9acd70376227aa674d10a1f
https://doi.org/10.21203/rs.3.rs-1171015/v1
https://doi.org/10.21203/rs.3.rs-1171015/v1
Publikováno v:
Nonlinear Dynamics. 60:443-457
In this paper, several smooth canonical 3-D continuous autonomous systems are proposed in terms of the coefficients of nonlinear terms. These systems are derived from the existing 3-D four-wing smooth continuous autonomous chaotic systems. These new
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9a957d0413826bd8eca5a52966899bb
https://doi.org/10.1007/s11071-009-9607-8
https://doi.org/10.1007/s11071-009-9607-8
Publikováno v:
Chaos, Solitons & Fractals. 40:2544-2549
A new hyperchaotic system which has two large positive Lyapunov exponents is presented and physically implemented. Spectral analysis shows that the system in the hyperchaotic mode has an extremely broad frequency bandwidth of high magnitudes, verifyi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a57aee2177b4d15c0509a5e045844770
https://doi.org/10.1016/j.chaos.2007.10.053
https://doi.org/10.1016/j.chaos.2007.10.053
Publikováno v:
Chaos, Solitons & Fractals. 40:2016-2030
In this paper, new properties of a four-dimensional chaotic system are investigated. These properties explain the behavior of the system and clarify why it can only generate two coexisting double-wing chaotic attractors but cannot produce a single fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90fb28da5a5b0191db819bdf8981a949
https://doi.org/10.1016/j.chaos.2007.09.095
https://doi.org/10.1016/j.chaos.2007.09.095
Publikováno v:
Chaos, Solitons & Fractals. 38:705-721
This paper introduces a new 3-D quadratic autonomous system, which can generate two coexisting single-wing chaotic attractors and a pair of diagonal double-wing chaotic attractors. More importantly, the system can generate a four-wing chaotic attract
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5e58695a3ce6eaf8081369730a6d800
https://doi.org/10.1016/j.chaos.2007.01.029
https://doi.org/10.1016/j.chaos.2007.01.029
Publikováno v:
Physics Letters A. 372:124-136
A new hyperchaotic system is presented, which has two large positive and one small negative Lyapunov exponent over a large range of parameters. As a consequence, system orbits strongly expand in some directions but rapidly shrink in some other direct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8837b09ce586811ac3c5413289c6958
https://doi.org/10.1016/j.physleta.2007.10.082
https://doi.org/10.1016/j.physleta.2007.10.082
Publikováno v:
The Lens
In many image analysis applications, such as image retrieval, the shape of an object is of primary importance. In this paper, a new shape descriptor, namely the Normalized Wavelet Descriptor (NWD), which is a generalization and extension of the Wavel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4a818602cfe9c97f43787ef6beea38b
https://doi.org/10.1142/s0219691308002197
https://doi.org/10.1142/s0219691308002197
Publikováno v:
IFAC Proceedings Volumes. 40:898-903
This paper considers time-varying nonlinear SISO affine systems with unknown models and unknown bounded disturbance. A high order differentiator is proposed to extract derivatives of the measured signals up to n th -order. Stability and convergence o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cc32ec06d2582fa0cac7756bc936b8d
https://doi.org/10.3182/20070822-3-za-2920.00149
https://doi.org/10.3182/20070822-3-za-2920.00149