In this thesis we have concentrated on energy consumption issue and aim to develop an energy efficient data aggregation protocol. To provide energy efficiency we have considered a cluster-based wireless sensor network.

I am doing research in wireless sensor network in data aggregation. here cluster head send packet to base station .by using k means cluster algorthim A network is divided into k layer. k cluster are formed in k layer . each cluster has one cluster he

A New Differentially Private Data Aggregation With Fault Tolerance for Smart Grid Communications

选定 CIM 模型中的核心、电线、拓扑、量测等包中的相关类和关系作为构建配电网 GIS 数据模型的 CIM 子集，并对空 间数据交换模型进行了阐述。采用关系型数据库实现配电网 GIS 空间数据库的设计，将数据模型中的泛化、聚合和简单关联 映射为关系型数据库的表间引用关系。提出的数据模型存储方法避免了类间关联全部下落于叶节点类，降低了叶节点对象之 间关系的复杂度。通过对配电网 GIS 数据模型中的类进行适当扩展，为其添加数据维护操作和必要的属性扩展，进而生成数 据维护命令，使数据和关系维护变成类对