Results 131 to 140 of about 6,898 (176)

Commissioning of a gantry-mounted synchrocyclotron for preclinical FLASH studies utilizing spread-out Bragg peaks. [PDF]

J Appl Clin Med Phys
Lowe M, Zhang H, Owen D, Darafsheh A, Zhao T.   +4 more
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Humans can find rhythm in randomly timed sounds. [PDF]

R Soc Open Sci
van der Werff J, Tufarelli T, Verga L, Ravignani A.   +3 more
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Restoration of Cambrian Paleogeomorphology and Its Geological Significance in the Tabei Area, Tarim Basin. [PDF]

ACS Omega
Shen L, Liao Q, Chen Y, Han Y, Zhu Z, Shi J, Wu Q.   +6 more
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Analysis of the influencing factors of vitality and built environment of shopping centers based on mobile-phone signaling data. [PDF]

PLoS One
Bai X, Zhou M, Li W.
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Overview of High-Performance Timing and Position-Sensitive MCP Detectors Utilizing Secondary Electron Emission for Mass Measurements of Exotic Nuclei at Nuclear Physics Facilities. [PDF]

Sensors (Basel)
Ge Z.
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Assessing the impact of 24-hour activity behaviors on cardiorespiratory fitness in the older adult: a component analysis approach. [PDF]

Front Public Health
Lu D, Zhang W, Tan S.
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Development of a new reference material for accurate measurements of lithium in Li-clays. [PDF]

Sci Rep
Quiroz Garduño LD, Mora García TD, Domínguez AS, Valle Moya E, Martínez Ríos FJ, Del Rocío Arvizu Torres M, Amezcua Vergara M, Hernández Leos R, Hernández Rodríguez C, Pérez García MR, de Jesús Pérez Bueno J.   +10 more
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Finding Hamiltonian isochronous centers by non-canonical transformations

, 2021
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Centers and Isochronous Centers of Liénard Systems

Differential Equations, 2019
Holomorphic Liénard systems are studied. The authors give necessary and sufficient conditions for the existence of a center and an isochronous center which are obtained without calculating the focus quantities and the isochronicity constants.
Amel'kin, V. V., Rudenok, A. E.
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Isochronous Centers in Planar Polynomial Systems

SIAM Journal on Mathematical Analysis, 1997
The authors consider the following planar system \[ \dot x = P(x,y),\quad \dot y = Q(x,y),\qquad (x,y)\in \mathbb{R}^2 \tag{1} \] where \(P\) and \(Q\) are polynomials in \(x\) and \(y\). Let the system (1) have a center, and let \(T\) be a period-function, i.e.
Christopher, C. J., Devlin, J.
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