改进rerank效果

backend/.env.xinference

@@ -3,6 +3,16 @@
 SQL_DATABASE_URL=mysql+pymysql://zjinfo1:Dy2Bcr53Hm5xRkba@110.42.234.166:3306/zjinfo1
 #SQL_DATABASE_URL=mysql+pymysql://zjinfo2:GSKcziSdBixDXwcd@110.42.234.166:3306/zjinfo2
 
+#--------------------------
+# 是否启用检索重排功能
+ENABLE_RERANK=true
+# The number of similar embeddings to return when retrieving documents.
+TOP_K=5
+# Rerank model
+RERANK_MODEL=bge-reranker-v2-m3
+RERANK_BASE_URL=http://10.1.16.39:9995
+RERANK_TOP_N=5
+RERANK_THRESHOLD=0.3
 #----------   Xinference    ----------------
 # The provider for the AI models to use.
 MODEL_PROVIDER=xinference
@@ -19,9 +29,7 @@ EMBEDDING_MODEL=bge-m3
 EMBEDDING_BASE_URL=http://10.1.16.39:9995
 # Dimension of the embedding model to use.
 EMBEDDING_DIM=1024
-# Rerank model
-RERANK_MODEL=bge-reranker-v2-m3
-RERANK_BASE_URL=http://10.1.16.39:9995
+
 ##----------   OpenAI    ----------------
 ## The provider for the AI models to use.
 #MODEL_PROVIDER=openai
@@ -46,17 +54,10 @@ RERANK_BASE_URL=http://10.1.16.39:9995
 ## Name of the embedding model to use.
 #EMBEDDING_MODEL=text-embedding-v2
 
-#--------------------------
-# 是否启用检索重排功能
-ENABLE_RERANK=true
-
 
 # The questions to help users get started (multi-line).
 CONVERSATION_STARTERS=本工程指什么？\n总算表有哪些费用？\n项目划分哪些内容构成？\n其他费用表有哪些内容？
 
-# The number of similar embeddings to return when retrieving documents.
-TOP_K=5
-
 # The time in milliseconds to wait for the stream to return a response.
 STREAM_TIMEOUT=60000