为此将数据副本机制与信息安全结合起来，提出一种决定数据资源副本数量的数学模型。
Combining data replication with security, we proposed a mathematic model which can determine data replication quantity.
地理信息系统技术与水质预测数学模型相接合，创建了水系信息查询及水质实时预测系统。该系统运用于九洲江水系水资源保护规划，起到了数据整理分析和管理决策的作用。
The joint between the technology of GIS and the model on predicting water quality, has established the system used to inquiry the information of water quality and predict the water quality instantly.
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