This is BibTeX, Version 0.99d (TeX Live 2019/dev/Debian)
Capacity: max_strings=100000, hash_size=100000, hash_prime=85009
The top-level auxiliary file: main.aux
A level-1 auxiliary file: figure08.aux
A level-1 auxiliary file: mafigure.aux
A level-1 auxiliary file: filter.aux
A level-1 auxiliary file: structure.aux
A level-1 auxiliary file: figure07.aux
A level-1 auxiliary file: figure09.aux
A level-1 auxiliary file: figure01.aux
A level-1 auxiliary file: figurecov01.aux
A level-1 auxiliary file: figure02.aux
A level-1 auxiliary file: data02.aux
The style file: IEEEtran.bst
Reallocated singl_function (elt_size=4) to 100 items from 50.
Reallocated singl_function (elt_size=4) to 100 items from 50.
Reallocated singl_function (elt_size=4) to 100 items from 50.
Reallocated wiz_functions (elt_size=4) to 6000 items from 3000.
Reallocated singl_function (elt_size=4) to 100 items from 50.
Database file #1: main.bib
-- IEEEtran.bst version 1.14 (2015/08/26) by Michael Shell.
-- http://www.michaelshell.org/tex/ieeetran/bibtex/
-- See the "IEEEtran_bst_HOWTO.pdf" manual for usage information.
** IEEEtran BST control entry "IEEEexample:BSTcontrol" detected.
Warning--missing nationality in barrauAligment2016
Warning--empty journal in qinGeneral2019

Done.
You've used 42 entries,
            4087 wiz_defined-function locations,
            1080 strings with 15806 characters,
and the built_in function-call counts, 31039 in all, are:
= -- 2479
> -- 703
< -- 269
+ -- 410
- -- 121
* -- 1595
:= -- 4653
add.period$ -- 88
call.type$ -- 42
change.case$ -- 41
chr.to.int$ -- 601
cite$ -- 44
duplicate$ -- 2271
empty$ -- 2501
format.name$ -- 156
if$ -- 7255
int.to.chr$ -- 0
int.to.str$ -- 41
missing$ -- 389
newline$ -- 148
num.names$ -- 41
pop$ -- 746
preamble$ -- 1
purify$ -- 0
quote$ -- 4
skip$ -- 2489
stack$ -- 0
substring$ -- 1377
swap$ -- 1863
text.length$ -- 72
text.prefix$ -- 0
top$ -- 6
type$ -- 42
warning$ -- 2
while$ -- 125
width$ -- 43
write$ -- 421
(There were 2 warnings)