Pàgina inicial > Resultats de la cerca: Physica
  Consells de cerca
Cerca avançada
Cerca col·leccions:
Ordena'ls per: Mostrar els resultats: Format de visualizació:
Dipòsit Digital de Documents de la UAB 20 registres trobats  1 - 10següent  anar al registre: La cerca s'ha fet en 0.02 segons. 
1.
28 p, 2.1 MB Local Piezoelectric Behavior of Potassium Sodium Niobate Prepared by a Facile Synthesis via Water Soluble Precursors / Senes, Nina (University of Sassari. Department of Chemistry and Pharmacy) ; Iacomini, Antonio (University of Sassari. Department of Chemistry and Pharmacy) ; Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia) ; Enzo, Stefano (University of Sassari. Department of Chemistry and Pharmacy) ; Mulas, Gabriele (University of Sassari. Department of Chemistry and Pharmacy) ; Cuesta-Lopez, Santiago (University of Burgos) ; Garroni, Sebastiano (University of Burgos)
Due to the ever-increasing restrictions connected to the use of toxic lead-based materials, the developing of lead-free piezoceramics has become one of the most urgent tasks. In this context, potassium sodium niobate materials (KNN) have attracted a lot of interest as promising candidates due to their excellent piezo properties. [...]
2018 - 10.1002/pssa.201700921
Physica Status Solidi (A) Applications and Materials Science, Vol. 215, Issue 16 (February 2018) , art. 1700921  
Registre complet -
2.
8 p, 144.4 KB Phenomenological test of the large N_c ChPT predictions for the pseudoscalar mixing parameters / Escribano, Rafel (Universitat Autònoma de Barcelona. Departament de Física) ; Institut de Física d'Altes Energies
A phenomenological analysis of various decay processes is performed in order to test the large Nc Chiral Perturbation Theory predictions for the octet and singlet pseudoscalar decay constants and mixing angles. [...]
2006
Acta Physica Polonica B, Vol. 37, no. 3 (2006), p. 867-874  
Registre complet - Creative Commons
3.
10 p, 2.1 MB Saddle-node bifurcation of limit cycles in an epidemic model with two levels of awareness / Juher, David (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística) ; Rojas, David (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística) ; Saldaña, Joan (Universitat de Girona. Departament d'Informàtica, Matemàtica Aplicada i Estadística)
In this paper we study the appearance of bifurcations of limit cycles in an epidemic model with two types of aware individuals. All the transition rates are constant except for the alerting decay rate of the most aware individuals and the rate of creation of the less aware individuals, which depend on the disease prevalence in a non-linear way. [...]
2023 - 10.1016/j.physd.2023.133714
Physica D. Nonlinear phenomena, Vol. 448 (June 2023) , art. 133714  
Registre complet - Creative Commons
4.
26 p, 910.3 KB Limit cycles in piecewise polynomial systems allowing a non-regular switching boundary / Li, Tao (Sichuan University. Department of Mathematics (China)) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Continuing the investigation for the piecewise polynomial perturbations of the linear center ẋ = −y, ẏ = x from Buzzi et al. (2018) for the case where the switching boundary is a straight line, in this paper we allow that the switching boundary is non-regular, i. [...]
2021 - 10.1016/j.physd.2021.132855
Physica D. Nonlinear phenomena, Vol. 419 (May 2021) , p. 132855  
Registre complet - Creative Commons
5.
12 p, 572.5 KB Periodic orbits of a Hamiltonian system related with the Friedmann-Robertson-Walker system in rotating coordinates / Buzzi, Claudio (Universidade Estadual Paulista. Instituto de Biociências, Letras e Ciências Exatas (Brazil)) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Santana, Paulo (Universidade Estadual Paulista. Instituto de Biociências, Letras e Ciências Exatas (Brazil))
We provide sufficient conditions on the four parameters of a Hamiltonian system, related with the Friedmann-Robertson-Walker Hamiltonian system in a rotating reference frame, which guarantee the existence of 12 continuous families of periodic orbits, parameterized by the values of the Hamiltonian, which born at the equilibrium point localized at the origin of coordinates. [...]
2020 - 10.1016/j.physd.2020.132673
Physica D. Nonlinear phenomena, Vol. 413 (December 2020) , art. 132673  
Registre complet - Creative Commons
6.
31 p, 382.8 KB Integrability by separation of variables / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Ramírez, Rafael Orlando (Universitat Rovira i Virgili. Departament d'Enginyeria Informàtica i Matemàtiques)
We study the integrability in the Jacobi sense (integrability by separation of variables), of the Hamiltonian differential systems using the Levi-Civita Theorem. In particular we solve the Stark problem for N>3.
2020 - 10.1016/j.physd.2020.132523
Physica D. Nonlinear phenomena, Vol. 409 (August 2020) , art. 132523  
Registre complet - Creative Commons
7.
10 p, 754.9 KB Non-existence, existence, and uniqueness of limit cycles for a generalization of the Van der Pol-Duffing and the Rayleigh-Duffing oscillators / Cândido, Murilo R. (Universidade Estadual de Campinas. Departamento de Matemática (Brazil)) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Valls, Clàudia 1973- (Universidade de Lisboa. Instituto Superior Técnico. Departamento de Matemática)
We study the limit cycles of some cubic family of differential equations, containing the well-known Van der Pol-Duffing and Rayleigh-Duffing oscillators. In particular, we characterize for the class of differential systems here studied the non-existence, existence and uniqueness of limit cycles. [...]
2020 - 10.1016/j.physd.2020.132458
Physica D. Nonlinear phenomena, Vol. 407 (June 2020) , art. 132458  
Registre complet - Creative Commons
8.
24 p, 390.1 KB Bifurcations from families of periodic solutions in piecewise differential systems / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Novaes, Douglas D. (Universidade Estadual de Campinas. Departamento de Matemática (Brazil)) ; Rodrigues, Camila A. B. (Universidade Federal de Santa Catarina. Departamento de Matemática (Brazil))
Consider a differential system of the form x'=F0(t,x)+∑ki=1εiFi(t,x)+εk+1R(t,x,ε),where Fi:S1×D → Rm and R:S1×D×(−ε0,ε0)→ Rm are piecewise Ck+1 functions and T-periodic in the variable t. [...]
2020 - 10.1016/j.physd.2020.132342
Physica D. Nonlinear phenomena, Vol. 404 (March 2020) , art. 132342  
Registre complet - Creative Commons
9.
38 p, 502.2 KB Limit cycles via higher order perturbations for some piecewise differential systems / Buzzi, Claudio. (Universidade Estadual Paulista (Brasil). Department of Mathematics) ; Lima, Mauricio Firmino Silva (Universidade Federal do ABC(Brazil). Centro de Matemática Computacâo e Cognicâo) ; Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
A classical perturbation problem is the polynomial perturbation of the harmonic oscillator, (x',y')=(-y + εf(x,y,ε),x εg(x,y,ε)). In this paper we study the limit cycles that bifurcate from the period annulus via piecewise polynomial perturbations in two zones separated by a straight line. [...]
2018 - 10.1016/j.physd.2018.01.007
Physica D. Nonlinear phenomena, Vol. 371 (May 2018) , p. 28-47  
Registre complet -
10.
31 p, 777.3 KB A numerical estimate of the regularity of a family of Strange non-chaotic Attractors / Alsedà i Soler, Lluís (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Mondelo González, José María (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Romero, David (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We estimate numerically the regularities of a family of Strange Non-Chaotic Attractors related with one of the models studied in C. Grebogy et al. (1984) (see also G. Keller (1996)). To estimate these regularities we use wavelet analysis in the spirit of R. [...]
2017 - 10.1016/j.physd.2016.12.006
Physica D. Nonlinear phenomena, Vol. 347 (May 2017) , p. 74-89  
Registre complet -

Dipòsit Digital de Documents de la UAB : 20 registres trobats   1 - 10següent  anar al registre:
Us interessa rebre alertes sobre nous resultats d'aquesta cerca?
Definiu una alerta personal via correu electrònic o subscribiu-vos al canal RSS.
Dipòsit Digital de Documents de la UAB :: Cerca :: Lliura :: Personalitza :: Ajuda
Powered by Invenio v1.1.6
Mantingut per ddd.bib@uab.cat  :: Metadades subjectes a:
Col·laborem