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semeval2010_ke_tagged

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A O
High-Accuracy O
, O
Low-Cost O
Localization O
System O
for O
Wireless O
Sensor O
Networks O
ABSTRACT O
The O
problem O
of O
localization B-KEY
of O
wireless O
sensor O
nodes O
has O
long O
been O
regarded O
as O
very O
difficult O
to O
solve O
, O
when O
considering O
the O
realities O
of O
real O
world O
environments O
. O
In O
this O
paper O
, O
we O
formally O
describe O
, O
design O
, O
implement O
and O
evaluate O
a O
novel O
localization B-KEY
system O
, O
called O
Spotlight O
. O
Our O
system O
uses O
the O
spatio-temporal O
properties O
of O
well O
controlled O
events O
in O
the O
network O
-LRB- O
e.g. O
, O
light O
-RRB- O
, O
to O
obtain O
the O
locations O
of O
sensor O
nodes O
. O
We O
demonstrate O
that O
a O
high O
accuracy B-KEY
in O
localization B-KEY
can O
be O
achieved O
without O
the O
aid O