5-year dataset: paired-concept deviations

The paired-concept means and standard deviations of annual co-occurrence rates from the 5-year data set. File format: tab-delimited table; carriage return & newline terminated. Columns: concept id1 - Unique numeric code identifying the first of the paired concepts; concept id2 - Unique numeric code identifying the second of the paired concepts; mean - The mean of the annual co-occurrence rates (1.0 = 100%); std - The standard deviation of the annual co-occurrence rates. The rows are arranged in ascending order by concept_id1, concept_id2.本数据集基于5年期数据计算得到配对概念年度共现率的均值与标准差。文件格式为制表符分隔表格（tab-delimited table），以回车换行符作为行终止符。各列说明如下：概念ID1（concept id1）——用于标识配对概念中首个概念的唯一数字编码；概念ID2（concept id2）——用于标识配对概念中第二个概念的唯一数字编码；均值（mean）——年度共现率的均值（1.0代表100%）；标准差（std）——年度共现率的标准差。数据行按照概念ID1、概念ID2的升序排列。