Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy-efficient Deployment of Relay Nodes in Wireless Sensor Networks
  using Evolutionary Techniques   Random deployment of sensor nodes is susceptible to initial communication
hole, even when the network is densely populated. However, eliminating holes
using structural deployment poses its difficulties. In either case, the
resulting coverage holes can degrade overall network performance and lifetime.
Many solutions utilizing Relay Nodes (RNs) have been proposed to alleviate this
problem. In this regard, one of the recent solutions proposed using Artificial
Bee Colony (ABC) to deploy RNs. This paper proposes RN deployment using two
other evolutionary techniques - Gravitational Search Algorithm (GSA) and
Differential Evolution (DE) and compares them with existing solution that uses
ABC. These popular optimization tools are deployed to optimize the positions of
relay nodes for lifetime maximization. Proposed algorithms guarantee
satisfactory RNs utilization while maintaining desired connectivity level. It
is shown that DE-based deployment improves the network lifetime better than
other optimization heuristics considered.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph