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1)  isometric matrix
等距矩阵
2)  partial isometry matrix of quaternions
部分等距四元数矩阵
3)  distance matrix
距离矩阵
1.
Study on the improved topological index of distance matrix and its application;
改进的距离矩阵指数W_1~*及其应用研究
2.
The element of matrix in the distance matrix S*_~ij is defined and the topological index W* based on the distance matrix is defined as well.
定义了矩阵元Sij和基于距离矩阵的拓扑指数W。
3.
According to the adjacency matrix and distance matrix of the two units, the sequential formulas to calculate Wiener topological indices or molecular topological indices have been given.
将任一枝状烷烃拆分为由直链单元与余下烷基两部分构成,从隐氢图的距离矩阵和邻接矩阵出发,分别导出了计算该烷烃的MTI和Wiener拓扑指数的递推公式,进而证明了直链烷烃的MTI与Wiener指数间存在3。
4)  matrix distance
矩阵距离
1.
Based on the minimum matrix distance criterion, the method equals to aggregating individual pairwise judgment matrices to find a matrix, the sum of whose distances to the individual matrices is minimized, and then the latter reduces to a goal programming model.
在分析了基于层次分析法的群体决策方法的类型、评价准则后,提出了一种基于最小矩阵距离准则的群体决策方法。
5)  isometric line array
等距线阵
1.
Beamforming in strong jamming based on isometric line array is proposed.
提出强干扰条件下等距线阵的波束形成方法。
6)  Idempotent matrix
幂等矩阵
补充资料:等距抽样
分子式:
CAS号:

性质:又称系统抽样或机械抽样。将总体中各样品按某标志顺序(如按时间顺序、地区顺序或其他人为的顺序)排列,然后依照固定顺序或间隔来抽样,比方说先由头k个单位中抽一个单位样本,以后每隔k个单位抽取一个单位样本等。等距抽样的优点。能保证样本单位在总体中均匀地分布,抽样方法简便,易于实施。

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