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Table 2 Notations used

From: Tracking intruder ship in wireless environment

Notations Descriptions
N, E Represents a set of nodes and a set of edges of the graph
S Sink node deployed at the centre of a grid
F A set of unknown faulty nodes or tampered nodes
R A set of ACTIVE relay nodes in the bottleneck zone (area around the sink nodes)
R′ Set of SLEEP relay nodes
Vector x Consisting of n measured features of size and shape of waveform created by objects
Vector y A set of objects
Vector x′ Modified set of vector x due to faulty sensors