laser scan vector velocimeter 激光矢量速度计
vector scan [计] 向量扫描 ; 扫描仪 ; 矢向扫描法
vector scan electron beam system 矢量扫描电子束装置
vector scan electron beam lithography 矢量扫描电子束光刻
vector scan electron beam bitey 矢量扫描电子束光刻
monochrome vector scan type display 单色向量扫描显示器
vector scan electron axle system 矢量扫描电子整装置
The item of attribute frequency in the scan vector was taken as heuristic information to improve the efficiency of attributes reduction.
以扫描向量中的属性频率项作为属性约简搜索的启发信息，提高了属性约简效率。
Then for each row from the fact table scan, the foreign key is also hashed and probed into the bit vector to determine whether the current fact table row is filtered out.
然后针对事实表扫描的每一行，外键也被散列并探测到位向量中，从而判断当前的事实表行是否被过滤掉了。
The time_id join keys that meet the filter requirements on the Time dimension table are hashed to create a bit vector that filters rows of the Orders table from the skip scan above.
Time 维度表中满足过滤条件的 time_id 连接键被散列以创建一个位向量，用于过滤以上跳跃式扫描的 Orders 表行。
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