... KCKB key control keyboard 键控键盘，键控板 KEYMAT key matrix 键矩阵 Key operation 操纵键 ...
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用形态学矩阵或键合图法来进行方案设计时，通常存在组合爆炸现象。
There is "combinational explosion" phenomena, when morphological matrix method is used to solve project design.
EVM为醇中烷基的键连接矩阵特征根之和，PEI为烷基的极化效应指数。
Where EVM is the sum of eigenvalue of bonding orbital-connection matrix of the alkyl group and PEI is the polarizibility of alkyl.
新的键指数X考虑了分子的图形特征，顶点原子的性质，顶点原子与相邻原子的键合情况，并以矩阵的形式把这些特征表达出来。
A novel link index X proposed deals with the feature of molecule graph, the property of vertical atom and the bonding of atoms connected to each other. Matrices are used to represent these characters.
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