【摘要】 本文运用镇江月平均气温一维时间序列作相空间拓展，和假定相空间状态变量随时间的演化方程含有线性项和二次非线性项，利用最小二乘法求解各项系数，保留其大差贡献较大的项，重建动力系统．并用镇江月平均气温实测值作检验．结果表明，重建的动力方程对月平均气温的演变能作出较好的描写．更多还原

【Abstract】 A dynamical system for monthly average temperature in Zhengjiang city Jiangsu Prorince, was reconstructed by means the extension of Phase space and the evolation equation of phase space transformation. The reconstructed dynamical equation can be satisfactorily used to describe the evolutional trenrd of monthly average temperature更多还原