updated readme

Author: liminchen

9_reduced_DOF/readme.md

@@ -1,6 +1,6 @@
-# Mass-Spring Solids Simulation
+# Reduced Simulation of Neo-Hookean Solids 
 
-A square falling onto the ground under gravity is simulated with mass-spring elasticity potential and implicit Euler time integration.
+A square falling onto the ground under gravity is simulated using neo-Hookean elasticity and implicit Euler time integration in the reduced solution space constructed via polynomial functions or modal-order reduction.
 Each time step is solved by minimizing the Incremental Potential with the projected Newton method.
 
 ## Dependencies