diff --git a/radar-admin/src/main/java/com/pgmmers/radar/controller/ActivationApiController.java b/radar-admin/src/main/java/com/pgmmers/radar/controller/ActivationApiController.java
index d4cba0a..5ad34fe 100644
--- a/radar-admin/src/main/java/com/pgmmers/radar/controller/ActivationApiController.java
+++ b/radar-admin/src/main/java/com/pgmmers/radar/controller/ActivationApiController.java
@@ -34,6 +34,9 @@ import java.util.List;
 @Api(value = "ActivationApi", description = "策略集管理相关操作",  tags = {"策略集API"})
 public class ActivationApiController {
 
+    /**
+     * service.
+     */
     @Autowired
     private ActivationService activationService;
 
diff --git a/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/engine/AggregateCommandImpl.java b/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/engine/AggregateCommandImpl.java
index 5febef1..57f2d23 100644
--- a/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/engine/AggregateCommandImpl.java
+++ b/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/engine/AggregateCommandImpl.java
@@ -30,6 +30,7 @@ public class AggregateCommandImpl implements AggregateCommand {
         return count(modelId, searchField, searchFieldValue, refDateName,"1", begin, end);
     }
 
+    @Override
     public long count(String modelId, String searchField, Object searchFieldValue, String refDateName, String status, Date begin,
                       Date end) {
         String collectionName = "entity_" + modelId;
@@ -123,12 +124,14 @@ public class AggregateCommandImpl implements AggregateCommand {
         } else {
             int model = docList.size() % 2;
             if (model == 1) {
-                doc = docList.get(model);
+                int pos = docList.size() / 2;
+                doc = docList.get(pos);
                 median = new BigDecimal(doc.get(funcField).toString());
             } else {
-                doc = docList.get(model);
+                int pos = docList.size() / 2;
+                doc = docList.get(pos);
                 median = new BigDecimal(doc.get(funcField).toString());
-                doc = docList.get(model - 1);
+                doc = docList.get(pos - 1);
                 BigDecimal tmp = new BigDecimal(doc.get(funcField).toString());
                 median = median.add(tmp).divide(new BigDecimal(2), 2, 4);
             }
diff --git a/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/EntityServiceImpl.java b/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/EntityServiceImpl.java
index 72efa9d..1404616 100644
--- a/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/EntityServiceImpl.java
+++ b/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/EntityServiceImpl.java
@@ -55,7 +55,7 @@ public class EntityServiceImpl implements EntityService {
         Document filter = new Document();
         filter.append(model.getEntryName(), eventId);
         Document updateDoc = new Document();
-        updateDoc.append("status",status);
+        updateDoc.append("status", status);
         String collectionName = buildCollectionName(modelId);
         return mongoService.update(collectionName, filter, updateDoc);
     }
@@ -68,7 +68,7 @@ public class EntityServiceImpl implements EntityService {
         Document attach = Document.parse(attachJson);
         ModelVO model = modelService.getModelById(modelId);
         attach.put("radar_ref_datetime", new Date(doc.getLong(model.getReferenceDate())));
-        attach.put("status", 1);
+        attach.put("status", "1");
         doc.putAll(attach);
         if (!isAllowDuplicate) {
             //设置查询条件
diff --git a/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/ModelServiceImpl.java b/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/ModelServiceImpl.java
index b75b52d..36601e8 100644
--- a/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/ModelServiceImpl.java
+++ b/radar-service-impl/src/main/java/com/pgmmers/radar/service/impl/model/ModelServiceImpl.java
@@ -208,7 +208,7 @@ public class ModelServiceImpl extends BaseLocalCacheService implements ModelServ
 
         // add status.
         Document statusKey = new Document();
-        statusKey.put("status", 1);
+        statusKey.put("status", "1");
         IndexModel statusIndex = new IndexModel(statusKey);
         indexes.add(statusIndex);
 
diff --git a/radar-service/src/main/java/com/pgmmers/radar/service/cache/CacheService.java b/radar-service/src/main/java/com/pgmmers/radar/service/cache/CacheService.java
index eb400a0..8bba477 100644
--- a/radar-service/src/main/java/com/pgmmers/radar/service/cache/CacheService.java
+++ b/radar-service/src/main/java/com/pgmmers/radar/service/cache/CacheService.java
@@ -11,7 +11,10 @@ import com.pgmmers.radar.vo.model.ModelVO;
 import com.pgmmers.radar.vo.model.PreItemVO;
 import com.pgmmers.radar.vo.model.RuleVO;
 
-
+/**
+ * cache service.
+ * @author feihu.wang
+ */
 public interface CacheService {
      void saveAntiFraudResult(String modelId, String sessionId, CommonResult result);
 
diff --git a/sql/radar-1.0.8.sql b/sql/radar-1.0.8.sql
index 5e769df..b0d5f79 100644
--- a/sql/radar-1.0.8.sql
+++ b/sql/radar-1.0.8.sql
@@ -2,4 +2,4 @@ ALTER TABLE `engine_rule`
     ADD COLUMN `MAX` int(11)  NOT NULL DEFAULT 0 COMMENT '最大得分值' AFTER `RATE`;
 	
 ALTER TABLE  `engine_data_list_records`
-   ADD COLUMN  `DATA_REMARK` varchar(32) NULL COMMENT '数据备注';
+   ADD COLUMN  `DATA_REMARK` varchar(32) NULL COMMENT '数据备注' AFTER `DATA_RECORD`;