所述的滤波器的输出端连接运算放大器的输入端;
The output end of the filter is connected to the input end of OA.
空间连接运算是空间数据库中的一种基本操作,但它也是最复杂、最耗时的操作之一。
Spatial join is one of the most complex and time-consuming operations in spatial database systems.
和关系数据库中的连接运算一样,结构连接顺序的选择是XML数据库查询优化的核心。
As join operation to relational database, structural join order selection is at the heart of query optimization in an XML database.
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