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				@@ -147,6 +147,12 @@ class UpdateAccountReadAvgTaskConst: 
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				     USING_STATUS = 1 
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				     NOT_USING_STATUS = 0 
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				+    # 统计周期 
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				+    STAT_PERIOD = 30 
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				+ 
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				+    # default upper_quantile, confidence = 0.95 
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				+    DEFAULT_UPPER_QUANTILE = 0.975 
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				+ 
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				     ACCOUNT_READ_RATE_TABLE = "long_articles_read_rate" 
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				     ACCOUNT_READ_AVG_TABLE = "account_avg_info_v3" 
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