id: 06137747 dt: j an: au: You, Xiong ti: Limit-cycle-preserving simulation of gene regulatory oscillators. so: Discrete Dyn. Nat. Soc. 2012, Article ID 673296, 22 p. (2012). py: 2012 pu: Hindawi Publishing Corporation, New York, NY la: EN cc: 92C42 92D10 65L06 65C20 ut: ci: li: doi:10.1155/2012/673296 ab: Summary: In order to simulate gene regulatory oscillators more effectively, Runge-Kutta (RK) integrators are adapted to the limit-cycle structure of the system. Taking into account the oscillatory feature of the gene regulatory oscillators, phase-fitted and amplification-fitted Runge-Kutta (FRK) methods are designed. New FRK methods with phase-fitted and amplification-fitted updated are also considered. The error coefficients and the error constant for each of new FRK methods are obtained. In the numerical simulation of the two-gene regulatory system, the new methods are shown to be more accurate and more efficient than their prototype RK methods in the long-term integration. It is a new discovery that the best fitting frequency not only depends on the problem to be solved, but also depends on the method. rv: