df180a78_eXpress___Manual__Description
[#] 8 [Column Name] eff_counts [Example] 74.399258 [Description] 
The estimated number of fragments generated from this target in the sequencing experiment, adjusted for fragment and length biases. In other words, his is the expected number of reads from the experiment if these biases did not exist. This is the value recommended for input to count-biased differential expression tools.
eXpress • Manual
Description