Environmental Engineering Reference
In-Depth Information
12.292
θ
v
=
2
0%
12.291
12.290
12.289
12.288
12.287
12.286
0.0
0.1
0.2
0.3
0.4
0.5
f
(GHz)
(a)
350
θ
v
= 20%
300
250
200
150
100
50
0
0.0
0.1
0.2
0.3
0.4
0.5
f
(GHz)
(b)
Fig. 5.10
Permittivity spectra, as obtained from the adopted dielectric mixing model after op-
timization, for the sand sample moistened at θ
=
20%.
a
real part of permittivity.
b
imaginary
part of permittivity [48]
5.5
Enhancements of TDR-Based Static Electrical Conductivity
Measurement
Static electrical conductivity (
0
) is a fundamental physical parameter that is ex-
tremely useful in many research and industrial areas. Two major fields in which
the estimation of
σ
0
is particularly important are soil science and the agro-food in-
dustry: in the former,
σ
0
can be associated with several different properties such as
salinity, solute transport, etc.; whereas in the latter,
σ
σ
0
may be used as an indicator
of the quality status of the products.
Search WWH ::
Custom Search