Taking photographs and labeling them reinforce memories too.
拍摄照片并加上备注也能强化记忆。
Many optimal bus-labeling methods have been proposed in order to improve the efficiency of computation of nodal admittance matrix in power systems and to save the computer memories.
电力系统的节点导纳方程组一般是维数很大的线性方程组。为了减少导纳矩阵的运算量，节省计算机内存，人们提出了很多优化编号方法。
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