Results 61 to 70 of about 925 (179)
Subharmonics with Minimal Periods for Convex Discrete Hamiltonian Systems
Abstract and Applied Analysis, 2013 We consider the subharmonics with minimal periods for convex discrete Hamiltonian systems. By using variational methods and dual functional, we obtain that the system has a -periodic solution for each positive integer , and solution of system has minimal
Honghua Bin
doaj +1 more source
Integrals of Subharmonic Functions
Irish Mathematical Society Bulletin, 1989 See also Bull. Math. Soc. 19, 343-349 (1987; Zbl 0596.31003).
openaire +2 more sources
Subharmonic and multiple subharmonic solutions for second order differential systems
Differential and Integral Equations, 2003 The authors seek for subharmonic solutions of a system of second-order differential equations in \(\mathbb R^N\) of the form \[ \ddot u(t)+G'(u(t))=f(t) \quad \text{for } t\in \mathbb R, \tag{1} \] where \(N\) is a natural number, \(f\in C(\mathbb R,\mathbb R^N)\) is \(T\)-periodic, \(G\in C^2(\mathbb R^N,\mathbb R)\) is nonconvex, \(\ddot u={d^2u\over
Hirano, Norimichi, Shioji, Naoki
openaire +3 more sources
Effect of Rectangular Voltage Fluctuations on Currents of Single-Phase Induction Motors
Scientific Journal of Gdynia Maritime UniversityVarious power quality disturbances commonly occur in a power system, including voltage fluctuations. These can be analysed as simultaneous occurrences of voltage subharmonics and interharmonics of various frequencies – components of frequency less than ...
Marcin Pepliński, Piotr Gnaciński
doaj +1 more source
Subharmonic versions of Fatou’s theorem [PDF]
Proceedings of the American Mathematical Society, 1971 A theorem of Fatou concerning the boundary behavior of bounded harmonic functions in the unit disk is extended to normal subharmonic functions. A question—which has been answered in the normal holomorphic and normal harmonic cases—concerning existence of Fatou points for normal subharmonic functions is posed.
openaire +2 more sources
Journal of Differential Equations, 1986 We consider a piecewise linear second order ordinary differential equation which is topologically equivalent to the sine-Gordon equation. The system is subjected to a time harmonic disturbance and the behavior of the periodic solutions is examined. It is shown that subharmonic motions with period n times that of the disturbance appear via saddle- node ...
Chow, S.N, Shaw, S.W
openaire +2 more sources
Applied SciencesThe effects of harmonics, interharmonics, and subharmonics on low-voltage distribution networks, leading to a deterioration in electrical power quality, have become more evident in recent years.
Germán Martínez-Navarro +3 more
doaj +1 more source
Subharmonics are not an infallible safety metric for cavitation dynamics
International Journal of HyperthermiaObjective There has been a substantial increase in the range of applications for focused ultrasound in recent years with multiple clinical trials reporting promising results.
Qiang Wu +6 more
doaj +1 more source
Convexity and Subharmonic Functions
Irish Mathematical Society Bulletin, 1986 In diesem Tagungsbericht macht der Autor auf neueste Ergebnisse im Zusammenhang von Konvexität und subharmonischen Funktionen und über verallgemeinerte Mittelwerte aufmerksam. Ausführlich sind oder werden diese behandelt: vom Autor [J. Math. Anal. Appl. 108, 507-514 (1985; Zbl 0582.31005)], vom Autor und \textit{M. Klimek} [Bull. Lond. Math. Soc.
openaire +2 more sources
Study of Non-Linearities in Humpback Whale Song Units
Journal of Marine Science and EngineeringUnique in mammals, the vocal generator of mysticete species comprises membranes covering the two arytenoid cartilages that vibrate as the airflow passes through the trachea from the lungs to the laryngeal sac.
Yann Doh +8 more
doaj +1 more source