It is proposed a new topological method of adjacent matrix of esters which was constructed by taking the characteristic value of the pieces of ester compounds as principal diagonal element.
提出了拓扑方法，即考虑分子图顶点的性质，直接用酯类化合物的分子碎片的特征值为主元来构建邻接矩阵。
Taking maximum net present value as an optimum target and considering factors in mining, milling and metallurgy, a dynamic optimum method for optimizing cutoff grade of underground orebody is given.
以净现值最大为优化目标，同时考虑采、选、冶三阶段因素，给出了地下开采矿体边界品位动态优化的方法。
On this basis, the classification of chemical absorption is presented by a more reasonable method of division a new method for taking value of the appropriate conc...
在此基础上对化学吸收类别提出了一种较为合理的划分方法，对吸收剂中反应物适宜浓度的取值提出了一种新的方法。
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