Base stations 1 Cluster analysis 1 Clustering techniques 1 Energy consumption 1 Energy efficiency 1 Energy efficient 1 Energy efficient wireless sensor networks Fuzzy logic 1 Leaching 1 Lifetime improvement 1 Limited attentions 1 Low energy adaptive clustering hierarchies (LEACH) 1 Maximum distance 1 Network lifetime 1 Power management (telecommunication) 1 Routing protocols 1 Sensor nodes 1 Unequal clustering 1 Wireless sensor networks 1