Update index_retriever.py

index_retriever.py

@@ -71,18 +71,18 @@ def create_query_engine(vector_index):
         
         bm25_retriever = BM25Retriever.from_defaults(
             docstore=vector_index.docstore, 
-            similarity_top_k=80 
+            similarity_top_k=40 
         )
         
         vector_retriever = VectorIndexRetriever(
             index=vector_index, 
-            similarity_top_k=80,
-            similarity_cutoff=0.45
+            similarity_top_k=40,
+            similarity_cutoff=0.35
         )
         
         hybrid_retriever = QueryFusionRetriever(
             [vector_retriever, bm25_retriever],
-            similarity_top_k=160,
+            similarity_top_k=60,
             num_queries=1
         )