设Tn,k表示具有n个顶点和恰有k个悬挂点的非像星树的集合,利用比较特征多项式的方法刻画出了Tn,k中谱半径最大的树.......

In this research project, we measured and analyzed the spatial distribution of neutron beam Bragg diffracted from the fr......

The preparation of new types of poly(imide-urea)s (PIUs) with high thermal stability and improved solubility was investi......