add README.md

README.md

@@ -0,0 +1,8 @@
+The code uses two approaches to fit the experimental data with gamma distribution . 
+
+1) find a0 + a2*P2 + a4*P4, then use a0 to search for mini delta, the mixing ratio
+2) fit the a0 and delta directly .
+
+#simply make
+
+The settings and data are hard coded.