Replace README.md

README.md

@@ -4,9 +4,9 @@ Petri Net for Electric Car-Sharing System (ECSS).
 
 ## Background
 
-Implementation of the ECSS Petri Net model described in [this paper]([Modelling and Performance Analysis of Electric Car-Sharing Systems Using Petri Nets | E3S Web of Conferences (e3s-conferences.org)](https://www.e3s-conferences.org/articles/e3sconf/abs/2020/30/e3sconf_evf2020_03001/e3sconf_evf2020_03001.html)) (shown as below) in Modelica.
+Implementation of the ECSS Petri Net model described in [this paper](https://www.e3s-conferences.org/articles/e3sconf/abs/2020/30/e3sconf_evf2020_03001/e3sconf_evf2020_03001.html) (shown as below) in Modelica.
 
-![ECSS](C:\Users\wang\Documents\Modelica\PN4ECSS\PN4ECSS.JPG)
+![ECSS](./PN4ECSS.JPG)
 
 
 
@@ -29,7 +29,7 @@ There are two Modelica models
 * `CarSharing.mo` is the model of a subnet of "The City" part.
 * `CarSharingSystem.mo` is the model of the whole ECSS system.
 
-![](C:\Users\wang\Documents\Modelica\PN4ECSS\CarSharingSystem.png)
+![](./CarSharingSystem.png)
 
 This model generates some stochastic user (demands), you can simulate: 
 
@@ -41,4 +41,4 @@ This model generates some stochastic user (demands), you can simulate:
 
 Here you will find a gif to visualize the simulation result.
 
-![](C:\Users\wang\Documents\Modelica\PN4ECSS\PN4ECSS.gif)
\ No newline at end of file
+![](./PN4ECSS.gif)
\ No newline at end of file