normalize a passage according to its position in the document . typically passages towards the beginning of the document are more useful for summarizing the contents . the default implementation is 1 + 1/log pivot + passagestart concode_field_sep float b concode_elem_sep float k1 concode_elem_sep float pivot concode_field_sep float tf concode_elem_sep float weight
float function ( int arg0 ) { return 1 + 1 / ( float ) Math . log ( pivot + arg0 ) ; }