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. O |
Its O |
area O |
is O |
24 O |
mm/sup O |
2 O |
/ O |
and O |
its O |
power O |
consumption O |
is O |
120 B-KEY |
mW I-KEY |
Application O |
of O |
nonlinear B-KEY |
time I-KEY |
series I-KEY |
analysis O |
techniques O |
to O |
high-frequency B-KEY |
currency I-KEY |
exchange I-KEY |
data I-KEY |
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this O |
work O |
we O |
have O |
applied O |
nonlinear B-KEY |
time I-KEY |
series I-KEY |
analysis O |
to O |
high-frequency B-KEY |
currency I-KEY |
exchange I-KEY |
data I-KEY |
. O |
The O |
time O |
series O |
studied O |
are O |
the O |
exchange B-KEY |
rates I-KEY |
between O |
the O |
US B-KEY |
Dollar I-KEY |
and O |
18 O |
other O |
foreign B-KEY |
currencies I-KEY |
from O |
within O |
and O |
without O |
the O |
Euro B-KEY |
zone I-KEY |
. O |
Our O |
goal O |
was O |
to O |
determine O |
if O |
their O |
dynamical O |
behaviours O |
were O |
in O |
some O |
way O |
correlated O |
. O |
The O |
nonexistence O |
of O |
stationarity B-KEY |
called O |
for O |
the O |
application O |
of O |
recurrence B-KEY |
quantification I-KEY |
analysis I-KEY |
as O |
a O |
tool O |
for O |