本文将区间灰数进行了推广，给出了复区间灰数的定义，并讨论了它的运算及其性质。
This paper extends interval grey number, gives the definition of complex interval grey number, and discusses its operation and characteristics.
将信息获取能力分指标取数域延拓，求得相关对象关于灰类的综合聚类系数。
The number field continuation was adopted by information acquire ability sub index, and the gray comprehensive clustering coefficients of relative objects were also acquired.
将地震现象视为一内部信息部分已知、部分未知的灰色系统，表征强震发生前地震危险性的指标值实际上是灰数。
Earthquake phemomen as grey system is treated in which information is known partly and unknown partly. Actually, the index of seismic risk prior to strong earthquake is a grey number.
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