理学 国际空间数据处理大会 释 International Symposium on Spatial Data Handling; SDH 国际空间数据处理大会 国际地理联合会地理信息科学委员会发起的国际会议系列，是地理信息科学领域最早和最有代表性的国际会议之一。
网络与数据通信 协议体系与组成结构 释文 synchronous digital hierarchy, SDH 同步数字体系
- directed family of sets
- directed flow
- directed forgetting
- directed graph
- directed graph; digraph
- directed graphics
- directed group
- directed infinity
- Directed Infrared Countermeasures
- direct editing
- directed limit
- directed line
- directed line-segment
- directed mutagenesis
- directed network
- directed order
- directed ortho metallation
- directed ortho-metallation
- directed oxidation processing of ceramic matrix composites
- directed path
- directed plane
- directed point set
- directed quantity
- directed quasiorder
- directed relation graph