Hierarchical indexed direct access method ( HIDAM ) It is made of a bed of wool felting together. 分层索引直接存取法(DAM);分级索引直接存取法(DAM);层次索引直接存取方法它是由一层层毛毡螺旋缠绕粘接制作而成。
the RID_BIT equals predicate is implemented as a new direct access method in order to efficiently locate the row. 中,RIDBIT等于谓词被实现为一种新的直接访问方法,从而可以更有效地定位行。
It also explains the principles of USB ( Universal Serial Bus ) communication, the characteristics of its protocol and the DMA ( Direct Memory Access ) communication method. 同时也介绍了变压器绕组变形测试仪的通信模块的设计,说明了USB(通用串行总线)通信原理,协议特点,以及DMA通信方式。
Throughout the whole course of the investigation, We used the field direct observation method, the access method and data collection method to investigate, and the field direct observation method is the survey method that the sample line combined with sample quadrat. 在整个调查过程中,采用的是野外直接观察法、访问法和资料收集法进行调查,其中野外直接观察法具体采取的是样线和样方相结合的调查方法。
By providing a direct access, replaced the default full table scan retrieval method, to determine the data only, at the same time, improve data retrieval performance. 索引通过提供一种直接存取的方法来取代默认的全表扫描检索的方法,在确定数据唯一性的同时,也改善数据检索性能。