We have found out the equation of density matrix evolution of the two-level atomic system in the classic electromagnetism field. The Law of coherence of the state is obtained.
求解了经典电磁场中二能级原子系统的密度矩阵演化方程，得到了系统状态的相干特性。
In this paper, a new Evolution Strategy method for solving matrix eigenvalues and eigenvectors was proposed.
提出了一种基于进化策略求解矩阵特征值及特征向量方法。
Based on the remote sensing image of Yiwu and GIS, this paper conducts some research on transfer matrix analysis of landscape evolution of Yiwu.
以义乌市遥感影像为基础，在GIS支持下，对义乌城市景观演化进行转移矩阵研究。
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