Gu Changgui, Wang Jianxiong, Liu Zonghua
Department of Physics, East China Normal University, Institute of Theoretical Physics, Shanghai 200062, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Sep;80(3 Pt 1):030904. doi: 10.1103/PhysRevE.80.030904. Epub 2009 Sep 30.
The suprachiasmatic nucleus (SCN) pacemaker shows a free-running period ranging from 20 to 28 h for different species, which was usually explained from the angle of coupling strength. Based on the assumption of nonidentical coupling strengths in SCN, we find an alternative mechanism that the diversity of free-running period can be also caused by the distribution of coupling strengths. The free-running period is proportional to the average coupling strength and inverse proportional to the dispersion of couplings. Moreover, we present an analytic phase model to confirm our finding, which shows a solid foundation of our finding and opens a window to study the collective behaviors of SCN oscillators.
视交叉上核（SCN）起搏器在不同物种中的自由运转周期为20至28小时，这通常是从耦合强度的角度来解释的。基于SCN中耦合强度不同的假设，我们发现了另一种机制，即自由运转周期的多样性也可能由耦合强度的分布引起。自由运转周期与平均耦合强度成正比，与耦合的离散度成反比。此外，我们提出了一个解析相位模型来证实我们的发现，这为我们的发现奠定了坚实的基础，并为研究SCN振荡器的集体行为打开了一扇窗口。
