使用方差标定基准值3。

src/rank.rs

@@ -76,7 +76,9 @@ pub fn generate_rank_by_indicator_map(indicator_map: &MutexGuard<HashMap<String,
 
             total / effective_count
         };
-        let mut coverted_open_base = (msv_abs_max + msv_variance) / TWO_HUNDRED;
+        // 标准差
+        let standard_deviation = msv_variance.sqrt().unwrap();
+        let mut coverted_open_base = (msv_abs_max + standard_deviation) / TWO_HUNDRED;
         coverted_open_base.rescale(8);
 
         // ============== epr相关数据的计算 =================