\documentclass[a4paper,12pt]{report}
\usepackage{graphicx} % inserting images
\usepackage{colortbl, booktabs} % Highlight table
\usepackage{hyperref} % PDF links
\usepackage{setspace} % for switching between double/single space in document
\usepackage{fancyhdr} % package for changing Headings style
% setting the margins of page
\usepackage{amsmath}
\usepackage{multicol}
\usepackage[intoc, english]{nomencl}
\makenomenclature
\usepackage{subfigure}
\usepackage{caption}
\usepackage{subcaption}
\usepackage{chemfig}
\usepackage{float}
\usepackage[top=3cm,right=3cm,bottom=2.5cm,left=2.5cm]{geometry}            
\usepackage{tocbibind}% bib.. in table of content    
\setcounter{tocdepth}{4}
\usepackage{notoccite}
\usepackage{perpage}\MakePerPage{footnote}  %restart footnote
\usepackage{rotating} 						% Rotating table   
\usepackage{cite}
\usepackage{enumitem}						% itemize bullets
\usepackage[labelsep=space]{caption}		% chnage caption sep
\usepackage{slashbox}						% 
\usepackage{xepersian}
\renewcommand{\contentsname}{فهرست}
\renewcommand{\listfigurename}{فهرست شکل‌ها}
\renewcommand{\listtablename}{فهرست جدول‌ها}
\renewcommand{\bibname}{مرجع‌ها}
\renewcommand{\nomname}{فهرست نشان‌ها و اختصارات}
\renewcommand{\nomgroup}[1]{%
 \ifthenelse{\equal{#1}{A}}{\item[\textbf{اختصارات}]}{%
 \ifthenelse{\equal{#1}{F}}{\item[\textbf{پاورقی‌ها}]}{}}{
 \ifthenelse{\equal{#1}{L}}{\item[\textbf{زیرنویس‌ها}]}{}}{
 \ifthenelse{\equal{#1}{U}}{\item[\textbf{بالانویس‌ها}]}{}}{
 \ifthenelse{\equal{#1}{S}}{\item[\textbf{نمادها}]}{}}
 }
\DefaultMathsDigits
\SepMark{-}
\LTRdfnmakecol

% tell tex engine address of folder containing your pictures
\graphicspath{{images/}}

% commands to print the page number in header
\pagestyle{fancy}
\cfoot{}
\lhead{\thepage}

% commands related to XePersian package
\settextfont[Scale=1.1]{HM XKayhan}
\setdigitfont{HM XKayhan}
%\setlatintextfont{LinLibertine}
% -------------------------------------

\input{jeld_info}

\begin{document}

\include{cover_fa}
%\include{taeid}
%\settextfont[Scale=1.1]{IranNastaliq}
%\include{Taghdim}
%\include{Tashakor}
\settextfont[Scale=1.1]{HM XKayhan}
\setdigitfont{HM XKayhan}
\setstretch{2}
\include{abstract_fa}

\pagenumbering{harfi}
\tableofcontents
\listoffigures
\listoftables
\newpage 
\begin{multicols}{2}
	\printnomenclature
\end{multicols}
% insert each of your chapters with a \inlcude{filename} command as below
\setstretch{2}
\include{chap1}
\include{chap2}
\include{chap3}
\include{chap4}
% -----------------------------------------------------------------------

% If do not have appendix then comment following 3 lines
%\appendix
%\include{app1}
%\include{peyvast2}
% -------------------------------------------------------

\singlespacing
\include{references}
\include{abstract_en}
\include{cover_en}

\end{document}