Update app.py

app.py

@@ -29,8 +29,8 @@ def create_qa_system():
         
         # Text splitting
         text_splitter = CharacterTextSplitter(
-            chunk_size=800,
-            chunk_overlap=100,
+            chunk_size=1100,
+            chunk_overlap=200,
             separator="\n\n"
         )
         texts = text_splitter.split_documents(documents)
@@ -49,8 +49,10 @@ def create_qa_system():
             "text2text-generation",
             model="google/flan-t5-base",
             tokenizer=tokenizer,
-            max_length=300,
-            temperature=0.3,
+            max_length=600,
+            temperature=0.7,
+            do_sample=True,
+            top_k=50,
             device=-1
         )
         
@@ -60,7 +62,7 @@ def create_qa_system():
         # Create QA chain
         return RetrievalQA.from_llm(
             llm=llm,
-            retriever=db.as_retriever(search_kwargs={"k": 2}),
+            retriever=db.as_retriever(search_kwargs={"k": 3}),
             return_source_documents=True
         )
     except Exception as e: