I have never done any serious SQL design before. Anyways I have to store a hierarchical data structure, similar to a tree in a SQL database.<BR><BR>Right now I simply add a "parent_id" column in ...

The objective of this study is to shed new light on the industrial flow structure embedded in microscopic supplier-buyer relations. We first construct directed networks from actual data from interfirm ...

A novel Bayesian Hierarchical Network Model (BHNM ... By utilizing the river network's structure to integrate flow and stage data from upstream gauges, along with precipitation data from the immediate ...

China is mulling establishing a hierarchical data classification ... Liu believes that core data may include map data of the country's villages and cities such as geographic location of sensitive ...